WO2013179476A1 - Rotating electrical machine, stator for rotating electrical machine, and vehicle - Google Patents
Rotating electrical machine, stator for rotating electrical machine, and vehicle Download PDFInfo
- Publication number
- WO2013179476A1 WO2013179476A1 PCT/JP2012/064274 JP2012064274W WO2013179476A1 WO 2013179476 A1 WO2013179476 A1 WO 2013179476A1 JP 2012064274 W JP2012064274 W JP 2012064274W WO 2013179476 A1 WO2013179476 A1 WO 2013179476A1
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- WIPO (PCT)
- Prior art keywords
- coil
- stator core
- phase coil
- electrical machine
- rotating electrical
- Prior art date
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0025—Shaping or compacting conductors or winding heads after the installation of the winding in the core or machine ; Applying fastening means on winding heads
- H02K15/0037—Shaping or compacting winding heads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Definitions
- the present invention relates to a rotating electrical machine, a stator for a rotating electrical machine, and a vehicle, and more particularly, to a rotating electrical machine including a coil mounted by concentric winding, a stator for a rotating electrical machine, and a vehicle.
- a rotating electric machine including a coil mounted by concentric winding is known.
- Such a rotating electrical machine is disclosed in, for example, Japanese Patent Application Laid-Open No. 2009-189078.
- the above Japanese Patent Application Laid-Open No. 2009-189078 discloses a rotating electrical machine including a rotor arranged on the inner peripheral side of a stator and a stator including a plurality of coils.
- the stator is formed so that both of the coil ends protrude in the axial direction of the stator and the substantially rectangular first coil and both of the coil ends protrude inward in the radial direction of the stator.
- a third coil formed so that both of the coil ends protrude outward in the radial direction of the stator.
- the second coil is formed so that both the coil ends protrude radially inward
- the third coil is both the coil ends. Is formed so as to protrude outward in the radial direction of the stator, and therefore, it is considered that the peripheral length is longer than that of the first coil because the coil protrudes inward or outward in the radial direction. For this reason, since the electrical resistances of the first coil, the second coil, and the third coil are different from each other, there is a problem that pulsation may occur in the rotating electrical machine when the rotor rotates.
- the present invention has been made to solve the above-described problems, and one object of the present invention is that the electrical resistances of the coils are different while preventing the coils from interfering with each other. It is an object to provide a rotating electrical machine, a rotating electrical machine stator, and a vehicle that can suppress pulsation caused by the above.
- a rotating electrical machine includes a rotor, a stator core having a plurality of slots, the stator core being disposed so as to face the rotor, and a plurality of coils mounted concentrically on the slots of the stator core.
- the coil includes a first coil, a second coil, and a third coil that are provided corresponding to each phase of the three-phase alternating current, and the first coil, the second coil, and the third coil are different from each other. It has a shape and is configured to have substantially the same circumference.
- the first coil, the second coil, and the third coil are configured to be concentrically wound by configuring the first coil, the second coil, and the third coil so as to have mutually different shapes and substantially the same circumference. While mounting the first coil, the second coil, and the third coil in the slot, the first coil, the second coil, and the third coil are electrically connected to each other so that the coil ends of the coils do not interfere with each other. Therefore, the pulsation when the rotating electrical machine rotates can be suppressed while suppressing the first coil, the second coil, and the third coil from interfering with each other.
- a stator for a rotating electrical machine includes a stator core having a plurality of slots, and a plurality of coils mounted concentrically on the slots of the stator core, and the coils are provided corresponding to each phase of a three-phase alternating current.
- the first coil, the second coil, and the third coil are configured such that the first coil, the second coil, and the third coil have different shapes and have substantially the same circumferential length. Yes.
- the first coil, the second coil, and the third coil are configured so as to have different shapes and substantially the same circumferential length, thereby being concentric.
- the shapes of the first coil, the second coil, and the third coil are made different from each other so that the coil ends of the coils do not interfere with each other. Since electrical resistance can be made substantially the same, it is possible to suppress pulsation when the rotating electrical machine rotates while suppressing interference between the first coil, the second coil, and the third coil.
- a stator for a rotating electric machine can be provided.
- a vehicle is a vehicle including a rotating electrical machine, and the rotating electrical machine is provided with a rotor, a plurality of slots, a stator core disposed so as to face the rotor, and concentrically wound around the slots of the stator core.
- a stator having a plurality of mounted coils, the coil including a first coil, a second coil, and a third coil provided corresponding to each phase of the three-phase alternating current, the first coil
- the second coil and the third coil have different shapes and are configured to have substantially the same circumference.
- the first coil, the second coil, and the third coil are concentrically wound by configuring the first coil, the second coil, and the third coil so as to have mutually different shapes and substantially the same circumference. While mounting the 1 coil, the 2nd coil, and the 3rd coil in the slot, while making the shape different from each other so that the coil ends of each coil do not interfere, the electrical of the 1st coil, the 2nd coil, and the 3rd coil Since the resistances can be made substantially the same, a vehicle capable of suppressing pulsation when the rotating electrical machine rotates while suppressing interference between the first coil, the second coil, and the third coil. Can be provided.
- the rotating electrical machine the stator for the rotating electrical machine, and the vehicle, it is possible to suppress pulsation caused by different electrical resistances of the coils while suppressing the interference of the coils with each other.
- FIG. 1 planarly, and seeing from the radial direction outer side. It is a schematic diagram for demonstrating the structure of the coil of each phase of the electric motor shown in FIG. It is the perspective view which showed typically the whole structure of the electric motor by 2nd Embodiment. It is the top view which looked at the electric motor shown in FIG. 9 from the axial direction (above). It is the bottom view which looked at the electric motor shown in FIG. 9 from the axial direction (downward). It is the perspective view which showed the U-phase coil of the electric motor by 2nd Embodiment. It is the perspective view which showed the V phase coil of the electric motor by 2nd Embodiment. It is the perspective view which showed the W phase coil of the electric motor by 2nd Embodiment.
- the electric motor 100 includes a stator 1 that is a fixed portion and a rotor 2 that is a rotating portion (refer to a one-dot chain line).
- the rotor 2 includes a shaft 21 (see an alternate long and short dash line), a rotor core 22 (see an alternate long and short dash line), and a plurality of permanent magnets (not shown), and is rotatable around the shaft 21.
- the stator 1 is an example of a “rotor electric machine stator”.
- the stator 1 includes a stator core 1a having a plurality of slots 11 and a plurality of coils 1b mounted in the slots.
- the stator core 1a is formed in a cylindrical shape, and has a plurality of teeth 12 extending inward in the radial direction B on the inner peripheral side.
- the teeth 12 are provided at equiangular intervals along the circumferential direction C of the stator core 1 a, and a portion between the teeth 12 is a slot 11.
- the electric motor 100 is a three-phase AC rotating electric machine in which a three-phase coil is concentrically wound in a distributed winding and mounted in each slot 11.
- the plurality of coils 1b are composed of three types of coils, a U-phase coil 30, a V-phase coil 40, and a W-phase coil 50, corresponding to each phase of the three-phase alternating current.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 have shapes different from each other and have substantially the same circumferential length. It is configured. Details of the shape of each coil will be described later.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are examples of “first coil”, “second coil”, and “third coil”, respectively.
- each coil 1b occupies two different slots 11 at intervals (four slots in FIG. 7), and two adjacent coils 1b of other phases are arranged in the slot 11 between one side at a time. Therefore, each coil 1b is arranged in two slots in the order of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 from the right side in FIG.
- each coil 1b is a flat strip-shaped edgewise coil in which flat conductor wires are wound and stacked.
- the flat conducting wire has a substantially rectangular cross section having a width W1 and a thickness t1 (W1> t1) in the cross section.
- the flat conducting wires are stacked in a row in the thickness direction in the slot 11.
- the coil 1b has the laminated surface f formed by laminating
- the lamination width W2 of the lamination surface f is substantially equal to the thickness t1 of the flat conductor wire ⁇ the number of laminations, and the width of the end face e (the thickness of the coil 1b) is equal to the width W1 of the flat conductor wire.
- each coil 1b arranged in the slot 11 has a portion (coil end) that protrudes (exposes) in the axial direction from both ends in the axial direction A of the stator core 1a (slot 11).
- the axial direction A of the cylindrical stator core 1a is referred to as “axial direction”
- the radial direction B of the stator core 1a is referred to as “radial direction”
- the circumferential direction C of the stator core 1a is referred to as “circumferential direction”.
- the U-phase coil 30 includes a pair of coil side portions 31 inserted into different slots 11 and one side in the axial direction of the stator core 1 a at the coil end (arrow A1 direction side).
- the pair of bent portions 32 that are continuous from the pair of coil side portions 31 and the connecting portion 33 that connects the pair of bent portions 32 are provided.
- the coil side portion 31 is an example of an “axial portion”.
- the connecting portion 33 is an example of a “first connecting portion”.
- the pair of bent portions 32 have the same shape. Specifically, the bent portion 32 is formed by folding a coil side portion 31 protruding in the axial direction from the slot 11 into a substantially U shape radially outward at the coil end (see FIG. 1). As shown in FIG. 7, the protrusion height (maximum height) from the core end surface 1c of the bent portion 32 is H1. Further, the bent portion 32 has a front end surface 32a (see FIG. 7) of the bent portion 32 at a distance D1 (D1 ⁇ H1) in the vicinity of the axial end surface (hereinafter referred to as the core end surface 1c) of the stator core 1a. The stator core 1a is formed to face the stator core 1a.
- the connecting portion 33 is formed so as to extend in the circumferential direction, and connects the tip portions of the bent portion 32 in the vicinity of the core end surface 1c.
- the connecting portion 33 is arranged so that the laminated surface f of the edgewise coil faces the core end surface 1c and is substantially parallel to the core end surface 1c.
- the coil end of the U-phase coil 30 is formed in a shape having a concave portion 34 that is opened in the axial direction and includes a pair of bent portions 32 and a connecting portion 33 when viewed from the radial direction.
- a part of a coil end of another coil (W-phase coil 50) is arranged inside the concave portion 34.
- the U-phase coil 30 is substantially L-shaped radially inward at the coil end on the other axial side (arrow A2 direction side) of the stator core 1a. It includes a pair of bent portions 35 that are bent, and a connecting portion 36 that connects the pair of bent portions 35 to each other.
- U-phase coil 30 is bent in the radial direction of stator core 1a along the lamination direction of the rectangular conductive wires so as to have a shape different from that of V-phase coil 40 and W-phase coil 50.
- the U-phase coil 30 is bent radially inward at the coil end on the other axial side (arrow A2 direction side) of the stator core 1a, and extends in the axial direction of the stator core 1a along the axial direction of the stator core 1a. It is configured to be insertable into the slot 11 from the coil end side on the other side (arrow A2 direction side).
- the protruding amount L1 of the bent portion 35 to the inner side in the radial direction of the stator core 1a is the protruding amount L2 (see FIG. 5) of the bent portion 43 of the V-phase coil 40 to be described later to the inner side in the radial direction.
- L3 see FIG. 6
- the protruding amount is the length from the radially outer end of the bent portion 35 to the inner end.
- the connecting portion 36 is formed so as to extend along the circumferential direction.
- the circumferential length L4 of the connecting portion 36 is the circumferential length L5 (see FIG. 5) of the connecting portion 44 of the V-phase coil 40 described later and the connecting portion of the W-phase coil 50. It is the largest compared with the circumferential length L6 of 55 (see FIG. 6).
- the connecting portion 36 is disposed such that the end face e of the edgewise coil faces the axial direction and faces the end face in the axial direction of the rotor 2.
- the connecting portion 36 is an example of a “second connecting portion”.
- the V-phase coil 40 directly connects the tips of a pair of coil side portions 41 protruding in the axial direction from the slot 11 on one side of the coil end (arrow A1 direction side).
- the connecting part 42 is included.
- the connecting portion 42 is formed to extend along the circumferential direction across the bent portion 32 of the U-phase coil 30 and the bent portion 52 of the W-phase coil 50 described later.
- the connecting portion 42 is disposed such that the laminated surface f of the edgewise coil faces the axial direction and faces the axial end surface of the rotor 2.
- the protruding height of the connecting portion 42 from the core end surface 1c is H2 (see FIG. 7).
- the coil side portion 41 is an example of an “axial portion”.
- the connecting portion 42 is an example of a “first connecting portion”.
- the V-phase coil 40 includes a pair of substantially S-shaped bent portions 43 and tip ends of the pair of bent portions 43 on the other side (arrow A2 direction side) of the coil end. And a connecting portion 44 to be connected.
- V-phase coil 40 is bent in the radial direction of stator core 1a along the lamination direction of the rectangular conductive wires so as to have a shape different from that of U-phase coil 30 and W-phase coil 50.
- the V-phase coil 40 is bent radially inward at the coil end on the other axial side (arrow A2 direction side) of the stator core 1a, and extends in the axial direction of the stator core 1a along the axial direction of the stator core 1a.
- the protruding amount L2 of the bent portion 43 toward the inner side in the radial direction of the stator core 1a is the protruding amount L1 of the bent portion 35 of the U-phase coil 30 toward the inner side in the radial direction (see FIG. 4).
- the amount of protrusion L3 (see FIG. 6) inward in the radial direction of the bent portion 54 of the coil 50 is the largest.
- the bent portion 43 is formed so as to pass through the inner side in the axial direction of the connecting portion 36 of the U-phase coil 30 so as not to contact the connecting portion 36, and the axial direction of the bent portion 54 of the W-phase coil 50. It is formed so as to pass through the inside so as not to contact the connecting portion 55 (see FIG. 6).
- the connecting portion 44 is an example of a “second connecting portion”.
- the circumferential length L5 of the connecting portion 44 is equal to the circumferential length L4 (see FIG. 4) of the connecting portion 36 of the U-phase coil 30 and the connecting portion of the W-phase coil 50 described later. It is the smallest compared with the circumferential length L6 of 55 (see FIG. 6). Further, the connecting portion 44 is disposed such that the laminated surface f of the edgewise coil faces the axial direction and faces the axial end surface of the rotor 2.
- the W-phase coil 50 is continuous from a pair of coil side portions 51 on one side (arrow A1 direction side) of the coil end, and is bent into a substantially S shape radially outward.
- the pair of bent portions 52 and a connecting portion 53 that connects the pair of bent portions 52 are provided.
- the bending part 52 is arrange
- the bent portion 52 is disposed in the concave portion 34 of the U-phase coil 30.
- Connecting portion 53 is formed so as to extend along the circumferential direction, and is arranged to overlap with connecting portion 33 of U-phase coil 30 in the axial direction.
- the connecting portion 53 is disposed so that the laminated surface f of the edgewise coil faces the axial direction and faces the axial end surface of the rotor 2.
- the protrusion height from the core end surface 1c of the connection part 53 is H2 (refer FIG. 7). Therefore, at one coil end, the connecting portion 53 of the W-phase coil 50 and the connecting portion 42 of the V-phase coil 40 are arranged so as to be aligned along the radial direction (see FIG. 2).
- the coil side 51 is an example of an “axial portion”.
- the connecting portion 53 is an example of a “first connecting portion”.
- the W-phase coil 50 includes a pair of bent portions 54 that are bent in a substantially S shape radially inward on the other side (arrow A2 direction side) of the coil end, and a pair of folded portions. It includes a connecting portion 55 that connects the curved portion 54.
- W-phase coil 50 is bent in the radial direction of stator core 1a along the laminating direction of the rectangular conductive wire so as to have a shape different from that of U-phase coil 30 and V-phase coil 40.
- W-phase coil 50 is bent radially inward at the coil end on the other side (arrow A2 direction side) of stator core 1a in the axial direction, and in the axial direction of stator core 1a along the axial direction of stator core 1a.
- the protruding amount L3 of the bent portion 54 toward the radially inner side of the stator core 1a is larger than the bent portion 35 (see FIG. 4) of the U-phase coil 30, and the bent portion 43 (see FIG. 5) of the V-phase coil 40. Smaller than see). That is, as shown in FIG. 3, the connecting portion 36 of the U-phase coil 30, the connecting portion 55 of the W-phase coil 50, and the connecting portion 44 of the V-phase coil 40 are viewed from the outside in the radial direction. They are arranged in this order toward the inside.
- the connecting portion 55 is an example of a “second connecting portion”.
- the bent portion 54 is formed so as to pass through the inner side in the axial direction of the connecting portion 36 of the U-phase coil 30 so as not to contact the connecting portion 36.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are not in contact at the coil end on the other side in the axial direction of the stator core 1a.
- the connecting portion 55 is formed so as to extend along the circumferential direction.
- the circumferential length L6 of the connecting portion 55 is smaller than the circumferential length L4 (see FIG. 4) of the connecting portion 36 of the U-phase coil 30, and the V-phase coil 40 is connected. It is larger than the circumferential length L5 of the portion 44 (see FIG. 5).
- the connecting portion 55 is disposed such that the laminated surface f of the edgewise coil faces the axial direction and faces the end surface in the axial direction of the rotor 2.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are bent inward in the radial direction of the stator core 1a at the other coil end in the axial direction of the stator core 1a. At the coil end on one side, it extends along the axial direction of the stator core 1a like the V-phase coil 40, or is bent outward in the radial direction of the stator core like the U-phase coil 30 and the W-phase coil 50. ing.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are configured to have mutually different shapes and substantially the same circumference. Specifically, first, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are folded inward in the radial direction at the coil end on the other axial side of the stator core 1 a (arrow A2 direction side).
- the circumferential lengths L1, L2, and L3 of the curved portions 35, 43, and 54 are different from each other so that the circumferential lengths are substantially the same.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are arranged at the coil end on the other axial side of the stator core 1a in addition to the protruding amounts L1, L2, and L3.
- 40 and the shape of the bent portion of the W-phase coil 50 (the bent portion 35 of the U-phase coil 30 is L-shaped, the bent portion 43 of the V-phase coil 40 is S-shaped, and the bent portion 54 of the W-phase coil 50 is Are different from each other in S shape, so that the circumferences are substantially the same.
- the U-phase coil 30, the V-phase coil 40 and the W-phase coil 50 are respectively connected to the stator core 1 a of the connecting portion 36, the connecting portion 44 and the connecting portion 55 of the U-phase coil 30, the V-phase coil 40 and the W-phase coil 50.
- the circumferential lengths (L4, L5 and L6) are made substantially the same.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are configured to have different shapes and substantially the same circumference. Accordingly, when the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are mounted concentrically on the slot 11, the U-phase coil 30 is made different in shape so that the coil ends of the coils do not interfere with each other. Since the electrical resistances of the V-phase coil 40 and the W-phase coil 50 can be made substantially the same, while suppressing the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 from interfering with each other, The pulsation when the electric motor 100 rotates can be suppressed.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 have substantially the same circumference by making the coil end shapes different from each other. Constitute. Thereby, unlike the case where the shape of the coil end of U phase coil 30, V phase coil 40, and W phase coil 50 is mutually the same, the length of a coil end can be adjusted easily.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are made to have different shapes by making the coil ends bend different from each other, so that The length is configured to be substantially the same. Thereby, since the length of a coil end is easily adjusted by making the bending state of a coil end different from each other, it is possible to make the circumferential lengths of each other almost the same.
- At least two of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are connected to the shaft of the stator core 1a.
- the stator core 1a is bent outward in the radial direction, and at least two of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 (the U-phase coil 30 and the W-phase coil 50). ) Are overlapped along the axial direction.
- the connecting portion 33, the connecting portion 42, and the connecting portion 53 of the U-phase coil 30 are shifted in the radial direction without overlapping, the radial direction of the electric motor 100 is increased. An increase in length can be suppressed.
- the coil is constituted by a band-shaped edgewise coil in which flat conductor wires are wound and laminated, and the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are at least At the other coil end in the axial direction of the stator core 1a, the stator core 1a is bent so as to have different shapes in the radial direction (radial direction) of the stator core 1a along the lamination direction of the rectangular conductive wires.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 which are edgewise coils, can be easily bent in the radial direction.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are bent inward in the radial direction of the stator core 1a at the other coil end in the axial direction of the stator core 1a.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are It can be inserted into the slot 11 from the other coil end side in the axial direction of the stator core 1a along the axial direction of the stator core 1a.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are arranged inside the stator core 1 a in the radial direction at the coil end on the other axial side of the stator core 1 a. It is configured such that it can be bent and inserted into the slot 11 from the coil end side on the other side in the axial direction of the stator core 1a along the axial direction of the stator core 1a. Thereby, unlike the case where the coil is moved from the radially inner side to the outer side and inserted into the slot 11, the assembly work of the electric motor 100 can be easily performed.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are arranged at least on the radially inner side of the stator core 1a at the other coil end in the axial direction of the stator core 1a.
- the circumferential lengths of the bent portion 35, the bent portion 43, and the bent portion 54 that are bent inward are made to be substantially the same by making the protrusion amounts of the stator core 1a inward in the radial direction different from each other.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are added to the U-phase in addition to the protruding amount at the other coil end in the axial direction of the stator core 1 a.
- the circumferential lengths are made substantially the same.
- the peripheral lengths of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are made substantially the same depending on only the amount of protrusion on the radially inner side, such as an electric motor having a relatively small radial size.
- the bent portion 35, the bent portion 43, and the bent portion 35 at the coil end on the other side in the axial direction of the stator core 1a of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 The bent portion 54 is configured to have at least one of a substantially U shape, a substantially L shape, and a substantially S shape. Thereby, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 can be easily bent radially inward at the other coil end in the axial direction.
- the bent portion 35 of the U-phase coil 30 has a substantially L shape, and the amount of protrusion of the stator core 1a in the radial direction is minimized, so that the V-phase
- the bent portion 43 of the coil 40 has a substantially S shape, and the amount of protrusion of the stator core 1a in the radial direction is maximized, and the bent portion 54 of the W-phase coil 50 has a substantially S shape.
- the amount of protrusion of the stator core 1 a inward in the radial direction is larger than the bent portion 35 of the U-phase coil 30 and smaller than the bent portion 43 of the V-phase coil 40.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are connected to the connecting portions 36 of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50,
- the circumferential lengths of the stator core 1a of the connecting portion 44 and the connecting portion 55 are made different from each other so that the circumferential lengths are substantially the same.
- the connecting portion 36, the connecting portion 44, and the connecting portion 55 of the stator core 1a of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are further provided.
- the connecting portion 36, the connecting portion 44, and the connecting portion 55 of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are divided into the wide laminated surface f and the laminated surface. It is configured to have a narrow end surface orthogonal to f, and the stacked surface f or the end surface e is configured to face the axial direction of the stator core 1a.
- the axial direction edge part of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 can be made into a flat surface (lamination surface f or end surface e), the U-phase coil 30, the V-phase coil 40 Further, it is possible to suppress the colliding object from being damaged due to the collision with the axial end of the W-phase coil 50.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are bent inward in the radial direction of the stator core 1a at the other coil end in the axial direction of the stator core 1a.
- the coil end on one side extends along the axial direction of the stator core 1a or bends outward in the radial direction of the stator core 1a.
- the rotor 2 can be easily connected to the stator core 1a. Can be inserted inside.
- the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 intersect with each other without contacting at the coil end on the other axial side of the stator core 1 a. To place. Thereby, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are prevented from being short-circuited due to the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 being in contact with each other. Can do.
- the configuration of the electric motor 200 according to the second embodiment will be described with reference to FIGS.
- the U-phase coil 130 unlike the first embodiment in which the connecting portion 42 of the V-phase coil 40 and the connecting portion 53 of the W-phase coil 50 are arranged along the radial direction, the U-phase coil 130.
- An example in which the connecting portion 33, the connecting portion 144 of the V-phase coil 140, and the connecting portion 53 of the W-phase coil 150 are arranged in the axial direction will be described.
- the electric motor 200 is an example of a “rotary electric machine”.
- the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
- the stator 101 includes a plurality of coils 101b (a U-phase coil 130, a V-phase coil 140, and a W-phase coil 150).
- the U-phase coil 130, the V-phase coil 140, and the W-phase coil 150 are examples of “first coil”, “second coil”, and “third coil”, respectively.
- the stator 101 is an example of a “rotor electric machine stator”.
- the U-phase coil 130 of the second embodiment has the same shape as the U-phase coil 30 of the first embodiment at the coil end on one side (arrow A1 direction side). .
- the U-phase coil 130 connects the pair of bent portions 131 and the pair of bent portions 131 to each other at the coil end on the other side (arrow A2 direction side).
- the front end surface 131a of the bent portion 131 is formed to face outward in the axial direction, and the protruding height of the front end surface 131a of the bent portion 131 from the core end surface 1c is H11.
- a protruding amount L7 of the bent portion 131 to the radially inner side of the stator core 1a is a protruding amount L8 of the bent portion 145 (folded portion 146) of the V-phase coil 140 described later to the radially inner side (see FIG. 13).
- the connecting portion 132 is an example of a “second connecting portion”.
- the connecting portion 132 is formed so as to extend along the circumferential direction, and is formed so that the laminated surface f of the edgewise coil is opposed to the axial end surface of the rotor 2 and is substantially parallel. Further, the connecting portion 132 is disposed on the radially inner side of the stator core 1a so as not to overlap the stator core 1a in the axial direction.
- the circumferential length L10 of the connecting portion 132 is larger than the circumferential length L11 (see FIG. 13) of the connecting portion 145 of the V-phase coil 140, which will be described later, and the W-phase coil 150.
- the connecting portion 151 is smaller than the circumferential length L12 (see FIG. 14).
- the pair of bent portions 131 and the connecting portion 132 form a concave portion 133 whose inner side in the axial direction is open.
- the V-phase coil 140 has a pair of coil sides 141 that extend in the axial direction and are inserted into different slots 11.
- the V-phase coil 140 includes, at the coil end, a bent portion 142 that is continuous from one coil side portion 141, a bent portion 143 that is continuous from the other coil side portion 141, a bent portion 142, and a bent portion.
- a connecting portion 144 for connecting 143 is an example of an “axial portion”.
- the connecting portion 144 is an example of a “first connecting portion”.
- the bent portion 142 is radially outward, and the distal end surface 142a of the bent portion 142 is folded back toward the connecting portion 33 side (core end surface 1c side) of the U-phase coil 130. It has a substantially U shape similar to that of the bent portion 32.
- the protruding height of the bent portion 142 is H13, and the protruding height of the bent portion 32 is larger than H12 (see FIG. 12).
- the front end surface 142 a of the bent portion 142 is disposed inside the concave portion 34 formed by the pair of bent portions 32 of the U-phase coil 130 and the connecting portion 33 and at a position near the connecting portion 33. Yes.
- the bent portion 143 is such that the coil side portion 141 protruding in the axial direction from the slot 11 is radially outward at the coil end, and the distal end surface 143a of the bent portion 143 is opposite to the connecting portion 33 of the U-phase coil 130. It is bent toward (outside in the axial direction) and has a substantially S shape. Specifically, the bent portion 143 is formed into a substantially S-shape by being folded outward at approximately 90 degrees along the stacking direction (radial direction) of the flat wire, and then internally folded at approximately 90 degrees. Has been. The front end surface 143a of the bent portion 143 faces the opposite side (axially outer side) from the core end surface 1c.
- bent portion 143 is arranged inside concave portion 34 of U-phase coil 130 (adjacent U-phase coil 130) different from bent portion 142.
- the connecting portion 144 connects the distal end portion of the bent portion 142 facing the core end surface 1c side (connecting portion 33 side) and the distal end portion of the bent portion 143 facing the opposite side of the core end surface 1c. Is formed. Further, in the second embodiment, the connecting portion 144 is a convex second portion straddling the concave first portion 144a whose outer side in the axial direction is opened and the bent portion 32 of the U-phase coil 130 when viewed from the radial direction. It has a stepped shape including the portion 144b. The concave first portion 144 a is arranged in the vicinity of the coupling portion 33 in the concave portion 34 of the U-phase coil 130 by coupling with the distal end portion of the bent portion 142.
- the convex second portion 144b is formed so as to straddle the bent portion 32 of the U-phase coil 130 from the outside in the axial direction by being connected to the distal end portion of the bent portion 143.
- the first portion 144a and the second portion 144b are arranged so that the laminated surface f of the edgewise coil faces the core end surface 1c, is substantially parallel to the core end surface 1c, and extends in the circumferential direction, except for the central step portion. Is formed.
- the connecting portion 144 is disposed so as to overlap the connecting portion 33 of the U-phase coil 130 in the axial direction.
- the V-phase coil 140 has a bent portion 145 that is bent in a substantially S shape radially inward and a substantially U shape radially inward at the coil end on the other side.
- the folded portion 146 that is folded back, and the connecting portion 147 that connects the distal end portion of the bent portion 145 and the distal end portion of the bent portion 146 are included.
- a substantially U-shaped bent portion 146 is formed on the opposite side (the other side) of the substantially S-shaped bent portion 143 in the coil end on one side.
- a substantially S-shaped bent portion 145 is formed on the opposite side (the other side) of the substantially U-shaped bent portion 142 in the coil end on one side.
- the protruding amount L8 of the bent portion 145 (the bent portion 146) to the radially inner side of the stator core 1a is the protruding amount L7 of the bent portion 131 of the U-phase coil 130 to the radially inner side. (See FIG. 12) and the amount of protrusion L9 (see FIG. 14) inward in the radial direction of the bent portion 151 of the W-phase coil 150 to be described later is the smallest.
- the connecting portion 147 is an example of a “second connecting portion”.
- the connecting portion 147 has a stepped shape including a concave first portion 147a whose inner side in the axial direction is opened and a convex second portion 147b whose outer side in the axial direction is opened as viewed from the radial direction.
- the first portion 147a and the second portion 147b are formed so as to extend along the circumferential direction, except for the step portion at the center, the laminated surface f of the edgewise coil is opposed to the axial end surface of the rotor 2, and substantially It is formed to be parallel.
- the circumferential length L11 of the connecting portion 147 of the V-phase coil 140 is the circumferential length L10 of the connecting portion 132 of the U-phase coil 130 (see FIG. 12), and will be described later.
- connection part 147 is arrange
- bent portion 131 of the U-phase coil 130 is disposed in the concave first portion 147a.
- the W-phase coil 150 has the same shape as the W-phase coil 50 of the first embodiment at the coil end on one side (arrow A1 direction side).
- the W-phase coil 150 has a pair of bent portions 151 that are bent in a substantially L shape radially inward at the coil end on the other side (arrow A2 direction side), and tip portions of the pair of bent portions 151.
- the connecting portion 152 is an example of a “second connecting portion”.
- the pair of bent portions 151 extend linearly inward in the radial direction and are disposed so as to fit inside the concave first portion 147a of the V-phase coil 140 (inward in the axial direction). Further, the bent portion 151 is disposed so as to be accommodated inside the concave portion 133 (the inner side in the axial direction) of the U-phase coil 130. Further, the bent portion 151 passes through the inner side in the axial direction of the connecting portion 132 of the U-phase coil 130 and extends further inward in the radial direction than the connecting portion 147 of the V-phase coil 140 and the connecting portion 132 of the U-phase coil 130.
- the protrusion amount L9 to the radial inside of the stator core 1a of the bending part 151 is the protrusion amount L7 (refer FIG. 12) to the radial inside of the bending part 131 of the U-phase coil 130, And it is the largest compared with the protrusion amount L8 (refer FIG. 13) to the radial inside of the bending part 145 (bending part 146) of the V-phase coil 140.
- the connecting portion 152 is formed so as to extend along the circumferential direction, and is disposed at a position radially inward of the connecting portion 147 of the V-phase coil 140 and the connecting portion 132 of the U-phase coil 130. That is, as shown in FIG. 11, when viewed from the axial direction, the connecting portion 147 of the V-phase coil 140, the connecting portion 132 of the U-phase coil 130, and the connecting portion 152 of the W-phase coil 150 are from the radially outer side. They are arranged in this order toward the inside. As shown in FIG. 14, the connecting portion 152 is formed so that the end face e of the edgewise coil faces the axial direction, faces the axial end face of the rotor 2, and is substantially parallel.
- the connecting portion 152 is disposed on the radially inner side of the stator core 1a so as not to overlap the stator core 1a in the axial direction.
- the circumferential length L12 of the connecting portion 152 of the W-phase coil 150 is equal to the circumferential length L10 of the connecting portion 132 of the U-phase coil 130 (see FIG. 12) and the V-phase. Compared to the circumferential length L11 of the coupling portion 147 of the coil 140 (see FIG. 13), it is the smallest.
- the maximum protrusion height at the coil end on the other end side of the stator 101 of the second embodiment is the protrusion height H11 of the tip surface 131a of the bent portion 131 of the U-phase coil 130. Therefore, the coil ends of the respective phases are arranged so as to be located on the inner side in the axial direction from the concave portion 133 of the U-phase coil 130 having the protruding height H11.
- the U-phase coil 130, the V-phase coil 140, and the W-phase coil 150 have shapes different from each other and have circumferential lengths. It is comprised so that it may become substantially the same.
- the U-phase coil 130, the V-phase coil 140, and the W-phase coil 150 are bent portions that are bent radially inward at the other coil end (arrow A2 direction side) in the axial direction of the stator core 1a.
- the 131, 145 (146) and 151 projecting amounts L7, L8 and L9 inward in the radial direction are made different from each other, and the shape of the bent portion (the bent portion 131 of the U-phase coil 130 is S-shaped, and the V-phase coil 140 is The bent portion 145 is S-shaped, the bent portion 146 is U-shaped, and the bent portion 151 of the W-phase coil 150 is L-shaped). Further, the connecting portion 132, the connecting portion 147, and the connecting portion The circumferential lengths (L10, L11, and L12) of the stator core 1a of 152 are made different from each other so that the circumferential lengths are substantially the same.
- the connecting portion 147 of the V-phase coil 140 is configured to include the concave first portion 147a and the convex second portion 147b, and the convex shape of the V-phase coil 140 is formed.
- the second portion 147b of the U-phase coil 130 is disposed so as to straddle the second portion 147b. Thereby, the bending part 131 of the U-phase coil 130 can be protruded radially inward without the U-phase coil 130 and the V-phase coil 140 colliding with each other.
- the configuration of the electric motor 300 according to the third embodiment will be described with reference to FIGS.
- the first and second embodiments are configured such that the coil ends at both ends are asymmetrical (one is bent radially outward and the other is bent radially inner). Unlike the above, an example will be described in which the coil ends at both ends have substantially the same shape (substantially symmetrical shape).
- the electric motor 300 is an example of a “rotary electric machine”.
- the same components as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.
- the stator 201 includes a plurality of coils 201b (a U-phase coil 230, a V-phase coil 240, and a W-phase coil 250).
- the U-phase coil 230, the V-phase coil 240, and the W-phase coil 250 are examples of “first coil”, “second coil”, and “third coil”, respectively.
- the stator 201 is an example of a “rotor electric machine stator”.
- the U-phase coil 230 is substantially L connected to a pair of coil side portions 231 on one side (arrow A1 direction side) and the other side (arrow A2 direction side) of the coil end.
- a pair of bent portions 232 having a letter shape and a connecting portion 233 for connecting the tip portions of the pair of bent portions 232 are included.
- the connecting portion 232 is formed so that the end face e of the edgewise coil faces the core end face 1c.
- connecting portion 233 is arranged radially outside of connecting portion 244 of V-phase coil 240 and connecting portion 253 of W-phase coil 250 described later.
- the coil side portion 231 is an example of an “axial portion”.
- the connecting portion 233 is an example of a “first connecting portion”.
- the V-phase coil 240 is radially connected to one of the coil side portions 241 on one side (arrow A1 direction side) and the other side (arrow A2 direction side) of the coil end.
- a bent portion 242 bent in a substantially S shape on the outer side, a bent portion 243 folded back in a substantially U shape on the radially outer side, a distal end portion of the bent portion 242 and a distal end portion of the bent portion 243
- a connecting portion 244 to be connected.
- the connecting portion 244 has a stepped shape including a concave first portion 245 that is open on the outer side in the axial direction and a convex second portion 246 that is open on the inner side in the axial direction when viewed from the radial direction.
- the first portion 245 and the second portion 246 are formed so as to extend along the circumferential direction, except for the step portion at the center, the laminated surface f of the edgewise coil is opposed to the axial end surface of the rotor 2, and substantially It is formed to be parallel.
- the convex second portion 246 of the V-phase coil 240 is arranged so as to straddle the bent portion 232 of the U-phase coil 230.
- a bent portion 252 of the W-phase coil 250 to be described later is arranged so as to straddle the concave first portion 245 of the V-phase coil 240.
- the coil side 241 is an example of an “axial portion”.
- the connecting portion 244 is an example of a “first connecting portion”.
- the W-phase coil 250 is continuous from the pair of coil side portions 251 on one side (arrow A1 direction side) and the other side (arrow A2 direction side) of the coil end. It has a pair of bending part 252 bent by the substantially S shape outside, and the connection part 253 which connects a pair of bending part 252.
- the connecting portion 253 of the W-phase coil 250 and the connecting portion 244 of the V-phase coil 240 are spaced apart from each other in the axial direction. It is arranged to overlap along.
- the coil side 251 is an example of an “axial portion”.
- the connecting portion 253 is an example of a “first connecting portion”.
- the U-phase coil 230, the V-phase coil 240, and the W-phase coil 250 have shapes different from each other and have circumferential lengths. It is comprised so that it may become substantially the same.
- U-phase coil 230, V-phase coil 240, and W-phase coil 250 have a protruding amount L 13 of the bent portion 232 of U-phase coil 230 protruding outward in the radial direction of stator core 1 a and a concave shape of V-phase coil 240.
- the circumferential lengths are substantially the same.
- the effect of the third embodiment is the same as that of the first and second embodiments.
- the coil shape of each phase is arbitrary, and can be applied to any of the coil shapes shown in the first to third embodiments. Therefore, here, an example in which the configuration of the fourth embodiment is applied to the coils of the first embodiment (the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50) will be described.
- the coils 401b composed of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are respectively connected to the low-speed coil section 460 and the low-speed coil section.
- a coil portion 470 Specifically, in each coil 401 b, a part of the laminated rectangular conductor wire constitutes a low-speed coil part 460 and the other part constitutes a low-speed coil part 470.
- the low-speed coil portion 460 and the low-speed coil portion 470 are separated from each other by an insulating member 480.
- each coil 401 b is configured such that the low-speed coil portion 460 and the low-speed coil portion 470 are arranged in the common slot 11.
- the stator 401 is an example of a “rotor electric machine stator”.
- the low speed / high speed coil section 460 of each coil 401b is used both when the electric motor 400 is driven at low speed and during high speed driving, and the low speed coil section 470 is configured to be used only when the electric motor 400 is driven at low speed. Yes.
- These low-speed coil section 460 and low-speed coil section 470 can be switched in a connection state by a winding switching section CS as shown in FIG.
- the electric motor 400 is connected to the power supply unit BU and the winding switching unit CS, respectively.
- the electric motor 400 is configured to be driven in response to three-phase AC power supplied from the power supply unit BU.
- the low speed coil section 460 and the low speed coil section 470 of each coil 401b are electrically connected in series.
- Terminals TU1, TV1, and TW1 on one side of the low-speed coil unit 460 are connected to the power supply unit BU.
- terminals TU2, TV2 and TW2 on the other side of the low-speed coil unit 460 and on one side of the low-speed coil unit 470 are connected to the winding switching unit CS.
- the terminals TU3, TV3, and TW3 on the other side of the low speed coil unit 470 are connected to the winding switching unit CS.
- Winding switching unit CS includes a high-speed switch SW1 for short-circuiting terminals TU2, TV2 and TW2 of electric motor 400 and a low-speed switch SW2 for short-circuiting terminals TU3, TV3 and TW3 of electric motor 400.
- the winding switching unit CS turns off the high-speed switch SW1 and turns on the low-speed switch SW2 during low-speed driving.
- the terminals TU3, TV3, and TW3 are short-circuited, and a voltage is applied to both the low-speed coil unit 460 and the low-speed coil unit 470 in each phase coil 401b of the electric motor 400.
- the impedance of the coil 401b of each phase becomes large, a large voltage can be applied to the coil 401b, and the torque of the electric motor 400 during low speed driving can be increased.
- the winding switching unit CS turns on the high-speed switch SW1 and turns off the low-speed switch SW2 during high-speed driving.
- the terminals TU2, TV2, and TW2 are short-circuited, and a voltage is applied only to the low-speed coil section 460 in each phase coil 401b of the electric motor 400.
- the impedance of the coil 401b of each phase is smaller than when driving at low speed, the electric motor 400 can be driven at high speed.
- the coil 401b of each phase is provided with the low-speed coil unit 470 used only at low speeds and the low-high speed coil unit 460 used at both high speeds and low speeds.
- the low speed coil portion 470 and the low speed coil portion 460 are disposed in the common slot 11.
- the automobile 500 is provided with any one of the electric motors 100, 200, 300 and 400 of the first to fourth embodiments.
- the remaining configuration of the fifth embodiment is similar to that of the aforementioned first to fourth embodiments.
- the electric motor and the electric motor stator are shown, but a rotating electric machine such as a generator other than the electric motor and the stator for the electric rotating machine may be used.
- the U-phase coil, the V-phase coil, and the W-phase coil are bent outward on one side of the coil end and bent inward (or outward) on the other side.
- the U-phase coil, the V-phase coil, and the W-phase coil may be folded inward on both sides of the coil end.
- connection portions of the U-phase, V-phase, and W-phase coils are formed so as to extend along the circumferential direction of the stator core. Further, it may be formed so as to extend in an arc shape along the circumferential direction, or may be formed so as to extend linearly along the circumferential direction. Moreover, you may form a connection part so that it may extend in curvilinear form other than circular arc shape along the circumferential direction.
- the coil shown in FIG. 4 is a U-phase coil (first coil), the coil shown in FIG. 5 is a V-phase coil (second coil), and the shape shown in FIG.
- the coil having the shape shown in FIG. 4 is a V-phase coil (W-phase coil)
- the coil having the shape shown in FIG. 5 is a W-phase coil (U). 6 may be used as the U-phase coil (V-phase coil). That is, it is only necessary that coils having the same shape have the same phase.
- the coils of the second embodiment (FIGS. 12, 13, and 14) and the coils of the third embodiment may have the same shape and the same phase. .
- the example in which the motor of the first to fourth embodiments is provided in an automobile has been described.
- the first to the second are applied to a vehicle for a construction machine or an agricultural vehicle. You may provide the electric motor of 4 embodiment.
- the electric motors of the first to fourth embodiments may be provided in a ship, an aircraft, or the like.
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Abstract
In this rotating electrical machine (100), a coil (1b) includes a first coil (30), a second coil (40), and a third coil (50), provided correspondingly with respect to each phase of a triphase current, the first, second, and third coils being configured in differing shapes having a substantially identical circumferential length.
Description
この発明は、回転電機、回転電機用ステータおよび車両に関し、特に、同心巻により装着されたコイルを含む回転電機、回転電機用ステータおよび車両に関する。
The present invention relates to a rotating electrical machine, a stator for a rotating electrical machine, and a vehicle, and more particularly, to a rotating electrical machine including a coil mounted by concentric winding, a stator for a rotating electrical machine, and a vehicle.
従来、同心巻により装着されたコイルを含む回転電機が知られている。このような回転電機は、たとえば、特開2009-189078号公報に開示されている。
Conventionally, a rotating electric machine including a coil mounted by concentric winding is known. Such a rotating electrical machine is disclosed in, for example, Japanese Patent Application Laid-Open No. 2009-189078.
上記特開2009-189078号公報には、ステータの内周側に配置されたロータと、複数のコイルを含むステータとを備えた回転電機が開示されている。ステータは、コイルエンドの両方がステータの軸方向に突出するように形成されている略矩形形状の第1のコイルと、コイルエンドの両方がステータの半径方向の内側に突出するように形成されている第2のコイルと、コイルエンドの両方がステータの半径方向の外側に突出するように形成されている第3のコイルとを含んでいる。
The above Japanese Patent Application Laid-Open No. 2009-189078 discloses a rotating electrical machine including a rotor arranged on the inner peripheral side of a stator and a stator including a plurality of coils. The stator is formed so that both of the coil ends protrude in the axial direction of the stator and the substantially rectangular first coil and both of the coil ends protrude inward in the radial direction of the stator. And a third coil formed so that both of the coil ends protrude outward in the radial direction of the stator.
このように、従来では、上記特開2009-189078号公報のように同心巻により各相に対応するコイル(第1~第3のコイル)をステータに装着する場合、各コイルが互いに干渉するのを防止するために、各相に対応するコイルのコイルエンドの形状を互いに異なるように形成している。
As described above, conventionally, when coils corresponding to each phase (first to third coils) are mounted on the stator by concentric winding as in the above-mentioned JP 2009-189078 A, the coils interfere with each other. In order to prevent this, the coil ends of the coils corresponding to the phases are formed to have different shapes.
しかしながら、上記特開2009-189078号公報の回転電機では、第2のコイルは、コイルエンドの両方が半径方向の内側に突出するように形成されており、第3のコイルは、コイルエンドの両方がステータの半径方向の外側に突出するように形成されているため、コイルが半径方向の内側または外側に突出する分、第1のコイルと比べて周長が長くなると考えられる。このため、第1のコイル、第2のコイルおよび第3のコイルの電気的な抵抗が互いに異なるため、ロータが回転した際に回転電機に脈動が生じる場合があるという問題点がある。
However, in the rotating electrical machine disclosed in the above Japanese Unexamined Patent Publication No. 2009-189078, the second coil is formed so that both the coil ends protrude radially inward, and the third coil is both the coil ends. Is formed so as to protrude outward in the radial direction of the stator, and therefore, it is considered that the peripheral length is longer than that of the first coil because the coil protrudes inward or outward in the radial direction. For this reason, since the electrical resistances of the first coil, the second coil, and the third coil are different from each other, there is a problem that pulsation may occur in the rotating electrical machine when the rotor rotates.
この発明は、上記のような課題を解決するためになされたものであり、この発明の1つの目的は、各々のコイルが互いに干渉するのを抑制しながら、コイルの電気的な抵抗が異なることに起因する脈動を抑制することが可能な回転電機、回転電機用ステータおよび車両を提供することである。
The present invention has been made to solve the above-described problems, and one object of the present invention is that the electrical resistances of the coils are different while preventing the coils from interfering with each other. It is an object to provide a rotating electrical machine, a rotating electrical machine stator, and a vehicle that can suppress pulsation caused by the above.
第1の局面による回転電機は、ロータと、複数のスロットを有し、ロータと対向するように配置されたステータコアと、ステータコアのスロットに同心巻で装着された複数のコイルとを含むステータとを備え、コイルは、3相交流の各相に対応して設けられた第1コイルと、第2コイルと、第3コイルとを含み、第1コイル、第2コイルおよび第3コイルは、互いに異なる形状でかつ互いに周長が略同じになるように構成されている。
A rotating electrical machine according to a first aspect includes a rotor, a stator core having a plurality of slots, the stator core being disposed so as to face the rotor, and a plurality of coils mounted concentrically on the slots of the stator core. The coil includes a first coil, a second coil, and a third coil that are provided corresponding to each phase of the three-phase alternating current, and the first coil, the second coil, and the third coil are different from each other. It has a shape and is configured to have substantially the same circumference.
第1の局面による回転電機では、上記のように、第1コイル、第2コイルおよび第3コイルを、互いに異なる形状でかつ互いに周長が略同じになるように構成することにより、同心巻で第1コイル、第2コイルおよび第3コイルをスロットに装着する際に各コイルのコイルエンドが干渉しないように互いの形状を異ならせながら、第1コイル、第2コイルおよび第3コイルの電気的な抵抗を互いに略同じにすることができるので、第1コイル、第2コイルおよび第3コイルが互いに干渉するのを抑制しながら、回転電機が回転した際の脈動を抑制することができる。
In the rotating electrical machine according to the first aspect, as described above, the first coil, the second coil, and the third coil are configured to be concentrically wound by configuring the first coil, the second coil, and the third coil so as to have mutually different shapes and substantially the same circumference. While mounting the first coil, the second coil, and the third coil in the slot, the first coil, the second coil, and the third coil are electrically connected to each other so that the coil ends of the coils do not interfere with each other. Therefore, the pulsation when the rotating electrical machine rotates can be suppressed while suppressing the first coil, the second coil, and the third coil from interfering with each other.
第2の局面による回転電機用ステータは、複数のスロットを有するステータコアと、ステータコアのスロットに同心巻で装着された複数のコイルとを備え、コイルは、3相交流の各相に対応して設けられた第1コイルと、第2コイルと、第3コイルとを含み、第1コイル、第2コイルおよび第3コイルは、互いに異なる形状でかつ互いに周長が略同じになるように構成されている。
A stator for a rotating electrical machine according to a second aspect includes a stator core having a plurality of slots, and a plurality of coils mounted concentrically on the slots of the stator core, and the coils are provided corresponding to each phase of a three-phase alternating current. The first coil, the second coil, and the third coil are configured such that the first coil, the second coil, and the third coil have different shapes and have substantially the same circumferential length. Yes.
第2の局面による回転電機用ステータでは、上記のように、第1コイル、第2コイルおよび第3コイルを、互いに異なる形状でかつ互いに周長が略同じになるように構成することにより、同心巻で第1コイル、第2コイルおよび第3コイルをスロットに装着する際に各コイルのコイルエンドが干渉しないように互いの形状を異ならせながら、第1コイル、第2コイルおよび第3コイルの電気的な抵抗を互いに略同じにすることができるので、第1コイル、第2コイルおよび第3コイルが互いに干渉するのを抑制しながら、回転電機が回転した際の脈動を抑制することが可能な回転電機用ステータを提供することができる。
In the stator for a rotating electrical machine according to the second aspect, as described above, the first coil, the second coil, and the third coil are configured so as to have different shapes and substantially the same circumferential length, thereby being concentric. When mounting the first coil, the second coil, and the third coil in the slot, the shapes of the first coil, the second coil, and the third coil are made different from each other so that the coil ends of the coils do not interfere with each other. Since electrical resistance can be made substantially the same, it is possible to suppress pulsation when the rotating electrical machine rotates while suppressing interference between the first coil, the second coil, and the third coil. A stator for a rotating electric machine can be provided.
第3の局面による車両は、回転電機を備える車両であって、回転電機は、ロータと、複数のスロットが設けられ、ロータと対向するように配置されたステータコアと、ステータコアのスロットに同心巻で装着された複数のコイルとを有するステータとを含み、コイルは、3相交流の各相に対応して設けられた第1コイルと、第2コイルと、第3コイルとを含み、第1コイル、第2コイルおよび第3コイルは、互いに異なる形状でかつ互いに周長が略同じになるように構成されている。
A vehicle according to a third aspect is a vehicle including a rotating electrical machine, and the rotating electrical machine is provided with a rotor, a plurality of slots, a stator core disposed so as to face the rotor, and concentrically wound around the slots of the stator core. A stator having a plurality of mounted coils, the coil including a first coil, a second coil, and a third coil provided corresponding to each phase of the three-phase alternating current, the first coil The second coil and the third coil have different shapes and are configured to have substantially the same circumference.
第3の局面による車両では、上記のように、第1コイル、第2コイルおよび第3コイルを、互いに異なる形状でかつ互いに周長が略同じになるように構成することにより、同心巻で第1コイル、第2コイルおよび第3コイルをスロットに装着する際に各コイルのコイルエンドが干渉しないように互いの形状を異ならせながら、第1コイル、第2コイルおよび第3コイルの電気的な抵抗を互いに略同じにすることができるので、第1コイル、第2コイルおよび第3コイルが互いに干渉するのを抑制しながら、回転電機が回転した際の脈動を抑制することが可能な車両を提供することができる。
In the vehicle according to the third aspect, as described above, the first coil, the second coil, and the third coil are concentrically wound by configuring the first coil, the second coil, and the third coil so as to have mutually different shapes and substantially the same circumference. While mounting the 1 coil, the 2nd coil, and the 3rd coil in the slot, while making the shape different from each other so that the coil ends of each coil do not interfere, the electrical of the 1st coil, the 2nd coil, and the 3rd coil Since the resistances can be made substantially the same, a vehicle capable of suppressing pulsation when the rotating electrical machine rotates while suppressing interference between the first coil, the second coil, and the third coil. Can be provided.
上記回転電機、回転電機用ステータおよび車両によれば、各々のコイルが互いに干渉するのを抑制しながら、コイルの電気的な抵抗が異なることに起因する脈動を抑制することができる。
According to the rotating electrical machine, the stator for the rotating electrical machine, and the vehicle, it is possible to suppress pulsation caused by different electrical resistances of the coils while suppressing the interference of the coils with each other.
以下、実施形態を図面に基づいて説明する。
Hereinafter, embodiments will be described with reference to the drawings.
(第1実施形態)
まず、図1~図8を参照して、第1実施形態による電動機100の構成について説明する。第1実施形態では、回転電機の一例である電動機100を説明する。 (First embodiment)
First, the configuration of theelectric motor 100 according to the first embodiment will be described with reference to FIGS. 1st Embodiment demonstrates the electric motor 100 which is an example of a rotary electric machine.
まず、図1~図8を参照して、第1実施形態による電動機100の構成について説明する。第1実施形態では、回転電機の一例である電動機100を説明する。 (First embodiment)
First, the configuration of the
図1に示すように、電動機100は、固定部であるステータ1と、回転部であるロータ2(一点鎖線参照)とを備えている。ロータ2は、シャフト21(一点鎖線参照)と、ロータコア22(一点鎖線参照)と、図示しない複数の永久磁石とを含み、シャフト21を中心に回転可能となっている。なお、ステータ1は、「回転電機用ステータ」の一例である。
As shown in FIG. 1, the electric motor 100 includes a stator 1 that is a fixed portion and a rotor 2 that is a rotating portion (refer to a one-dot chain line). The rotor 2 includes a shaft 21 (see an alternate long and short dash line), a rotor core 22 (see an alternate long and short dash line), and a plurality of permanent magnets (not shown), and is rotatable around the shaft 21. The stator 1 is an example of a “rotor electric machine stator”.
ステータ1は、複数のスロット11を有するステータコア1aと、各スロットに装着された複数のコイル1bとを含んでいる。ステータコア1aは、円筒形状に形成され、内周側で半径方向Bの内側に延びる複数のティース12を有する。ティース12は、ステータコア1aの周方向Cに沿って等角度間隔で設けられており、このティース12の間の部分がスロット11である。
The stator 1 includes a stator core 1a having a plurality of slots 11 and a plurality of coils 1b mounted in the slots. The stator core 1a is formed in a cylindrical shape, and has a plurality of teeth 12 extending inward in the radial direction B on the inner peripheral side. The teeth 12 are provided at equiangular intervals along the circumferential direction C of the stator core 1 a, and a portion between the teeth 12 is a slot 11.
電動機100は、3相のコイルが分布巻の同心巻で各スロット11に装着された3相交流の回転電機である。たとえば、電動機100は、8極、48スロットを有し、毎極毎相スロット数qが、q=2(=48/(3×8))の回転電機からなる。複数のコイル1bは、3相交流の各相に対応して、U相コイル30、V相コイル40およびW相コイル50の3種類のコイルから構成されている。ここで、第1実施形態では、図4~図6に示すように、U相コイル30、V相コイル40およびW相コイル50は、互いに異なる形状でかつ互いに周長が略同じになるように構成されている。なお、各コイルの形状の詳細については、後述する。また、U相コイル30、V相コイル40およびW相コイル50は、それぞれ、「第1コイル」、「第2コイル」および「第3コイル」の一例である。
The electric motor 100 is a three-phase AC rotating electric machine in which a three-phase coil is concentrically wound in a distributed winding and mounted in each slot 11. For example, the electric motor 100 is composed of a rotating electrical machine having 8 poles and 48 slots, and the number of slots per phase per pole q = 2 (= 48 / (3 × 8)). The plurality of coils 1b are composed of three types of coils, a U-phase coil 30, a V-phase coil 40, and a W-phase coil 50, corresponding to each phase of the three-phase alternating current. Here, in the first embodiment, as shown in FIGS. 4 to 6, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 have shapes different from each other and have substantially the same circumferential length. It is configured. Details of the shape of each coil will be described later. The U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are examples of “first coil”, “second coil”, and “third coil”, respectively.
同心巻のコイル配置は、一例としては図7に示すものである。1つのコイル1bが間隔(図7では4スロット分)を隔てて異なる2つのスロット11を占有し、他の相の隣接する2つのコイル1bが片側ずつ、間のスロット11に配置される。このため、各コイル1bは、図7の右側からU相コイル30、V相コイル40、W相コイル50の順で2スロットずつ配置される。
As an example, the concentric coil arrangement is shown in FIG. One coil 1b occupies two different slots 11 at intervals (four slots in FIG. 7), and two adjacent coils 1b of other phases are arranged in the slot 11 between one side at a time. Therefore, each coil 1b is arranged in two slots in the order of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 from the right side in FIG.
図8に示すように、それぞれのコイル1bは、平角導線を巻き重ねて積層した扁平な帯状のエッジワイズコイルである。具体的には、平角導線は、断面における幅W1、厚みt1(W1>t1)の略長方形断面を有する。平角導線は、スロット11内で厚み方向に1列に積層されている。これにより、コイル1bは、平角導線が積層されることにより形成された積層面fと、積層方向の端面eとを有する。積層面fの積層幅W2は、平角導線の厚みt1×積層数に略等しく、端面eの幅(コイル1bの厚み)は、平角導線の幅W1に等しい。図1に示すように、スロット11内に配置されるそれぞれのコイル1bは、ステータコア1a(スロット11)の軸方向Aの両端から軸方向に突出(露出)する部分(コイルエンド)を有する。
As shown in FIG. 8, each coil 1b is a flat strip-shaped edgewise coil in which flat conductor wires are wound and stacked. Specifically, the flat conducting wire has a substantially rectangular cross section having a width W1 and a thickness t1 (W1> t1) in the cross section. The flat conducting wires are stacked in a row in the thickness direction in the slot 11. Thereby, the coil 1b has the laminated surface f formed by laminating | stacking a flat conducting wire, and the end surface e of the lamination direction. The lamination width W2 of the lamination surface f is substantially equal to the thickness t1 of the flat conductor wire × the number of laminations, and the width of the end face e (the thickness of the coil 1b) is equal to the width W1 of the flat conductor wire. As shown in FIG. 1, each coil 1b arranged in the slot 11 has a portion (coil end) that protrudes (exposes) in the axial direction from both ends in the axial direction A of the stator core 1a (slot 11).
次に、各相のコイルについて具体的に説明する。以下では、円筒形状のステータコア1aの軸方向Aを「軸方向」、ステータコア1aの半径方向Bを「径方向」、ステータコア1aの周方向Cを「周方向」とする。
Next, the coils for each phase will be specifically described. Hereinafter, the axial direction A of the cylindrical stator core 1a is referred to as “axial direction”, the radial direction B of the stator core 1a is referred to as “radial direction”, and the circumferential direction C of the stator core 1a is referred to as “circumferential direction”.
図1および図4に示すように、U相コイル30は、それぞれ異なるスロット11に挿入される一対のコイル辺部31と、コイルエンドのステータコア1aの軸方向の一方側(矢印A1方向側)において、一対のコイル辺部31から連続した一対の折曲部32と、一対の折曲部32を連結する連結部33とを有している。なお、コイル辺部31は、「軸方向部分」の一例である。また、連結部33は、「第1連結部」の一例である。
As shown in FIGS. 1 and 4, the U-phase coil 30 includes a pair of coil side portions 31 inserted into different slots 11 and one side in the axial direction of the stator core 1 a at the coil end (arrow A1 direction side). The pair of bent portions 32 that are continuous from the pair of coil side portions 31 and the connecting portion 33 that connects the pair of bent portions 32 are provided. The coil side portion 31 is an example of an “axial portion”. The connecting portion 33 is an example of a “first connecting portion”.
一対の折曲部32は、同一形状を有する。具体的には、折曲部32は、スロット11から軸方向に突出したコイル辺部31がコイルエンドにおいて径方向外側に略U字形状に折り返される(図1参照)ことにより形成されている。図7に示すように、折曲部32のコア端面1cから突出高さ(最大高さ)はH1である。また、折曲部32は、折曲部32の先端面32a(図7参照)がステータコア1aの軸方向端面(以下では、コア端面1cという)の近傍の距離D1(D1<H1)の位置で、ステータコア1aと対向するように形成されている。
The pair of bent portions 32 have the same shape. Specifically, the bent portion 32 is formed by folding a coil side portion 31 protruding in the axial direction from the slot 11 into a substantially U shape radially outward at the coil end (see FIG. 1). As shown in FIG. 7, the protrusion height (maximum height) from the core end surface 1c of the bent portion 32 is H1. Further, the bent portion 32 has a front end surface 32a (see FIG. 7) of the bent portion 32 at a distance D1 (D1 <H1) in the vicinity of the axial end surface (hereinafter referred to as the core end surface 1c) of the stator core 1a. The stator core 1a is formed to face the stator core 1a.
図1および図4に示すように、連結部33は、周方向に沿って延びるように形成され、コア端面1c近傍の折曲部32の先端部同士を連結している。また、連結部33は、エッジワイズコイルの積層面fがコア端面1cと対向し、コア端面1cと略平行になるように配置されている。また、U相コイル30のコイルエンドは、径方向から見て、一対の折曲部32と連結部33とからなる軸方向外側が開放された凹状部34を有する形状に形成されている。図1および図7に示すように、凹状部34の内部には、他のコイル(W相コイル50)のコイルエンドの一部が配置されている。
As shown in FIGS. 1 and 4, the connecting portion 33 is formed so as to extend in the circumferential direction, and connects the tip portions of the bent portion 32 in the vicinity of the core end surface 1c. The connecting portion 33 is arranged so that the laminated surface f of the edgewise coil faces the core end surface 1c and is substantially parallel to the core end surface 1c. In addition, the coil end of the U-phase coil 30 is formed in a shape having a concave portion 34 that is opened in the axial direction and includes a pair of bent portions 32 and a connecting portion 33 when viewed from the radial direction. As shown in FIGS. 1 and 7, a part of a coil end of another coil (W-phase coil 50) is arranged inside the concave portion 34.
ここで、第1実施形態では、図4に示すように、U相コイル30は、ステータコア1aの軸方向の他方側(矢印A2方向側)のコイルエンドにおいて、径方向内側に略L字形状に折り曲げられた一対の折曲部35と、一対の折曲部35同士を連結する連結部36とを含む。また、U相コイル30は、平角導線の積層方向に沿ってステータコア1aの径方向にV相コイル40およびW相コイル50と異なる形状になるように折り曲げられている。また、U相コイル30は、ステータコア1aの軸方向の他方側(矢印A2方向側)のコイルエンドにおいて、径方向内側に折り曲げられ、かつ、ステータコア1aの軸方向に沿ってステータコア1aの軸方向の他方側(矢印A2方向側)のコイルエンド側からスロット11に挿入可能に構成されている。また、折曲部35のステータコア1aの径方向内側への突出量L1は、後述するV相コイル40の折曲部43の径方向内側への突出量L2(図5参照)、および、W相コイル50の折曲部54の径方向内側への突出量L3(図6参照)と比べて、最も小さい。なお、突出量とは、折曲部35の径方向の外側の端部から内側の端部までの長さである。
Here, in the first embodiment, as shown in FIG. 4, the U-phase coil 30 is substantially L-shaped radially inward at the coil end on the other axial side (arrow A2 direction side) of the stator core 1a. It includes a pair of bent portions 35 that are bent, and a connecting portion 36 that connects the pair of bent portions 35 to each other. U-phase coil 30 is bent in the radial direction of stator core 1a along the lamination direction of the rectangular conductive wires so as to have a shape different from that of V-phase coil 40 and W-phase coil 50. The U-phase coil 30 is bent radially inward at the coil end on the other axial side (arrow A2 direction side) of the stator core 1a, and extends in the axial direction of the stator core 1a along the axial direction of the stator core 1a. It is configured to be insertable into the slot 11 from the coil end side on the other side (arrow A2 direction side). Further, the protruding amount L1 of the bent portion 35 to the inner side in the radial direction of the stator core 1a is the protruding amount L2 (see FIG. 5) of the bent portion 43 of the V-phase coil 40 to be described later to the inner side in the radial direction. Compared with the amount L3 (see FIG. 6) of the bent portion 54 of the coil 50 protruding inward in the radial direction. The protruding amount is the length from the radially outer end of the bent portion 35 to the inner end.
また、連結部36は、周方向に沿って延びるように形成されている。また、第1実施形態では、連結部36の周方向の長さL4は、後述するV相コイル40の連結部44の周方向の長さL5(図5参照)およびW相コイル50の連結部55の周方向の長さL6(図6参照)に比べて、最も大きい。また、連結部36は、エッジワイズコイルの端面eが軸方向を向き、ロータ2の軸方向端面と対向するように配置されている。なお、連結部36は、「第2連結部」の一例である。
Further, the connecting portion 36 is formed so as to extend along the circumferential direction. In the first embodiment, the circumferential length L4 of the connecting portion 36 is the circumferential length L5 (see FIG. 5) of the connecting portion 44 of the V-phase coil 40 described later and the connecting portion of the W-phase coil 50. It is the largest compared with the circumferential length L6 of 55 (see FIG. 6). Further, the connecting portion 36 is disposed such that the end face e of the edgewise coil faces the axial direction and faces the end face in the axial direction of the rotor 2. The connecting portion 36 is an example of a “second connecting portion”.
図1および図5に示すように、V相コイル40は、コイルエンドの一方側(矢印A1方向側)において、スロット11から軸方向に突出した一対のコイル辺部41の先端部同士を直接連結する連結部42を含む。連結部42は、U相コイル30の折曲部32、および、後述するW相コイル50の折曲部52を跨いで、周方向に沿って延びるように形成されている。連結部42は、エッジワイズコイルの積層面fが軸方向を向き、ロータ2の軸方向端面と対向するように配置されている。連結部42のコア端面1cからの突出高さは、H2(図7参照)である。なお、コイル辺部41は、「軸方向部分」の一例である。また、連結部42は、「第1連結部」の一例である。
As shown in FIGS. 1 and 5, the V-phase coil 40 directly connects the tips of a pair of coil side portions 41 protruding in the axial direction from the slot 11 on one side of the coil end (arrow A1 direction side). The connecting part 42 is included. The connecting portion 42 is formed to extend along the circumferential direction across the bent portion 32 of the U-phase coil 30 and the bent portion 52 of the W-phase coil 50 described later. The connecting portion 42 is disposed such that the laminated surface f of the edgewise coil faces the axial direction and faces the axial end surface of the rotor 2. The protruding height of the connecting portion 42 from the core end surface 1c is H2 (see FIG. 7). The coil side portion 41 is an example of an “axial portion”. The connecting portion 42 is an example of a “first connecting portion”.
また、第1実施形態では、V相コイル40は、コイルエンドの他方側(矢印A2方向側)において、略S字形状の一対の折曲部43と、一対の折曲部43の先端部を連結する連結部44とを含む。また、V相コイル40は、平角導線の積層方向に沿ってステータコア1aの径方向にU相コイル30およびW相コイル50と異なる形状になるように折り曲げられている。また、V相コイル40は、ステータコア1aの軸方向の他方側(矢印A2方向側)のコイルエンドにおいて、径方向内側に折り曲げられ、かつ、ステータコア1aの軸方向に沿ってステータコア1aの軸方向の他方側(矢印A2方向側)のコイルエンド側からスロット11に挿入可能に構成されている。また、折曲部43のステータコア1aの径方向内側への突出量L2は、U相コイル30の折曲部35の径方向内側への突出量L1(図4参照)、および、後述するW相コイル50の折曲部54の径方向内側への突出量L3(図6参照)に比べて、最も大きい。また、折曲部43は、U相コイル30の連結部36の軸方向内側を連結部36と接触しないように通るように形成されているとともに、W相コイル50の折曲部54の軸方向内側を連結部55(図6参照)と接触しないように通るように形成されている。なお、連結部44は、「第2連結部」の一例である。
In the first embodiment, the V-phase coil 40 includes a pair of substantially S-shaped bent portions 43 and tip ends of the pair of bent portions 43 on the other side (arrow A2 direction side) of the coil end. And a connecting portion 44 to be connected. V-phase coil 40 is bent in the radial direction of stator core 1a along the lamination direction of the rectangular conductive wires so as to have a shape different from that of U-phase coil 30 and W-phase coil 50. The V-phase coil 40 is bent radially inward at the coil end on the other axial side (arrow A2 direction side) of the stator core 1a, and extends in the axial direction of the stator core 1a along the axial direction of the stator core 1a. It is configured to be insertable into the slot 11 from the coil end side on the other side (arrow A2 direction side). Further, the protruding amount L2 of the bent portion 43 toward the inner side in the radial direction of the stator core 1a is the protruding amount L1 of the bent portion 35 of the U-phase coil 30 toward the inner side in the radial direction (see FIG. 4). The amount of protrusion L3 (see FIG. 6) inward in the radial direction of the bent portion 54 of the coil 50 is the largest. The bent portion 43 is formed so as to pass through the inner side in the axial direction of the connecting portion 36 of the U-phase coil 30 so as not to contact the connecting portion 36, and the axial direction of the bent portion 54 of the W-phase coil 50. It is formed so as to pass through the inside so as not to contact the connecting portion 55 (see FIG. 6). The connecting portion 44 is an example of a “second connecting portion”.
また、第1実施形態では、連結部44の周方向の長さL5は、U相コイル30の連結部36の周方向の長さL4(図4参照)および後述するW相コイル50の連結部55の周方向の長さL6(図6参照)に比べて、最も小さい。また、連結部44は、エッジワイズコイルの積層面fが軸方向を向き、ロータ2の軸方向端面と対向するように配置されている。
In the first embodiment, the circumferential length L5 of the connecting portion 44 is equal to the circumferential length L4 (see FIG. 4) of the connecting portion 36 of the U-phase coil 30 and the connecting portion of the W-phase coil 50 described later. It is the smallest compared with the circumferential length L6 of 55 (see FIG. 6). Further, the connecting portion 44 is disposed such that the laminated surface f of the edgewise coil faces the axial direction and faces the axial end surface of the rotor 2.
図1および図6に示すように、W相コイル50は、コイルエンドの一方側(矢印A1方向側)において、一対のコイル辺部51から連続し、径方向外側に略S字形状に折り曲げられた一対の折曲部52と、一対の折曲部52を連結する連結部53とを有している。第1実施形態では、折曲部52は、折曲部52の先端面がコア端面1cとは反対側(軸方向外側)を向いて配置されている。折曲部52は、U相コイル30の凹状部34内に配置されている。連結部53は、周方向に沿って延びるように形成され、U相コイル30の連結部33と軸方向に重なるように配置されている。連結部53は、エッジワイズコイルの積層面fが軸方向を向き、ロータ2の軸方向端面と対向するように配置されている。連結部53のコア端面1cからの突出高さは、H2(図7参照)である。したがって、一方側のコイルエンドにおいて、W相コイル50の連結部53とV相コイル40の連結部42とが、径方向に沿って並ぶように配置(図2参照)されている。なお、コイル辺部51は、「軸方向部分」の一例である。また、連結部53は、「第1連結部」の一例である。
As shown in FIGS. 1 and 6, the W-phase coil 50 is continuous from a pair of coil side portions 51 on one side (arrow A1 direction side) of the coil end, and is bent into a substantially S shape radially outward. The pair of bent portions 52 and a connecting portion 53 that connects the pair of bent portions 52 are provided. In 1st Embodiment, the bending part 52 is arrange | positioned with the front end surface of the bending part 52 facing the other side (axial direction outer side) from the core end surface 1c. The bent portion 52 is disposed in the concave portion 34 of the U-phase coil 30. Connecting portion 53 is formed so as to extend along the circumferential direction, and is arranged to overlap with connecting portion 33 of U-phase coil 30 in the axial direction. The connecting portion 53 is disposed so that the laminated surface f of the edgewise coil faces the axial direction and faces the axial end surface of the rotor 2. The protrusion height from the core end surface 1c of the connection part 53 is H2 (refer FIG. 7). Therefore, at one coil end, the connecting portion 53 of the W-phase coil 50 and the connecting portion 42 of the V-phase coil 40 are arranged so as to be aligned along the radial direction (see FIG. 2). The coil side 51 is an example of an “axial portion”. The connecting portion 53 is an example of a “first connecting portion”.
また、第1実施形態では、W相コイル50は、コイルエンドの他方側(矢印A2方向側)において、径方向内側に略S字形状に折り曲げられた一対の折曲部54と、一対の折曲部54を連結する連結部55と含む。また、W相コイル50は、平角導線の積層方向に沿ってステータコア1aの径方向にU相コイル30およびV相コイル40と異なる形状になるように折り曲げられている。また、W相コイル50は、ステータコア1aの軸方向の他方側(矢印A2方向側)のコイルエンドにおいて、径方向内側に折り曲げられ、かつ、ステータコア1aの軸方向に沿ってステータコア1aの軸方向の他方側(矢印A2方向側)のコイルエンド側からスロット11に挿入可能に構成されている。また、折曲部54のステータコア1aの径方向内側への突出量L3は、U相コイル30の折曲部35(図4参照)よりも大きく、V相コイル40の折曲部43(図5参照)よりも小さい。すなわち、図3に示すように、軸方向から見て、U相コイル30の連結部36と、W相コイル50の連結部55と、V相コイル40の連結部44とは、径方向外側から内側に向かってこの順で配置されている。なお、連結部55は、「第2連結部」の一例である。
In the first embodiment, the W-phase coil 50 includes a pair of bent portions 54 that are bent in a substantially S shape radially inward on the other side (arrow A2 direction side) of the coil end, and a pair of folded portions. It includes a connecting portion 55 that connects the curved portion 54. W-phase coil 50 is bent in the radial direction of stator core 1a along the laminating direction of the rectangular conductive wire so as to have a shape different from that of U-phase coil 30 and V-phase coil 40. W-phase coil 50 is bent radially inward at the coil end on the other side (arrow A2 direction side) of stator core 1a in the axial direction, and in the axial direction of stator core 1a along the axial direction of stator core 1a. It is configured to be insertable into the slot 11 from the coil end side on the other side (arrow A2 direction side). Further, the protruding amount L3 of the bent portion 54 toward the radially inner side of the stator core 1a is larger than the bent portion 35 (see FIG. 4) of the U-phase coil 30, and the bent portion 43 (see FIG. 5) of the V-phase coil 40. Smaller than see). That is, as shown in FIG. 3, the connecting portion 36 of the U-phase coil 30, the connecting portion 55 of the W-phase coil 50, and the connecting portion 44 of the V-phase coil 40 are viewed from the outside in the radial direction. They are arranged in this order toward the inside. The connecting portion 55 is an example of a “second connecting portion”.
また、折曲部54は、U相コイル30の連結部36の軸方向内側を連結部36と接触しないように通るように形成されている。そして、第1実施形態では、図1~図3に示すように、U相コイル30、V相コイル40およびW相コイル50は、ステータコア1aの軸方向の他方側のコイルエンドにおいて、接触せずに互いに交差するように(すなわち互いに所定の間隔を隔てた状態で)配置されている。
Further, the bent portion 54 is formed so as to pass through the inner side in the axial direction of the connecting portion 36 of the U-phase coil 30 so as not to contact the connecting portion 36. In the first embodiment, as shown in FIGS. 1 to 3, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are not in contact at the coil end on the other side in the axial direction of the stator core 1a. Are arranged so as to cross each other (that is, at a predetermined interval from each other).
また、連結部55は、周方向に沿って延びるように形成されている。また、第1実施形態では、連結部55の周方向の長さL6は、U相コイル30の連結部36の周方向の長さL4(図4参照)よりも小さく、V相コイル40の連結部44の周方向の長さL5(図5参照)よりも大きい。また、連結部55は、エッジワイズコイルの積層面fが軸方向を向き、ロータ2の軸方向端面と対向するように配置されている。
Further, the connecting portion 55 is formed so as to extend along the circumferential direction. In the first embodiment, the circumferential length L6 of the connecting portion 55 is smaller than the circumferential length L4 (see FIG. 4) of the connecting portion 36 of the U-phase coil 30, and the V-phase coil 40 is connected. It is larger than the circumferential length L5 of the portion 44 (see FIG. 5). Further, the connecting portion 55 is disposed such that the laminated surface f of the edgewise coil faces the axial direction and faces the end surface in the axial direction of the rotor 2.
このように、第1実施形態では、U相コイル30、V相コイル40およびW相コイル50は、ステータコア1aの軸方向の他方側のコイルエンドにおいて、ステータコア1aの径方向内側に折り曲げられているとともに、一方側のコイルエンドにおいて、V相コイル40のようにステータコア1aの軸方向に沿って延びるか、または、U相コイル30およびW相コイル50のようにステータコアの半径方向の外側に折り曲げられている。
Thus, in the first embodiment, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are bent inward in the radial direction of the stator core 1a at the other coil end in the axial direction of the stator core 1a. At the coil end on one side, it extends along the axial direction of the stator core 1a like the V-phase coil 40, or is bent outward in the radial direction of the stator core like the U-phase coil 30 and the W-phase coil 50. ing.
以上のように、U相コイル30、V相コイル40およびW相コイル50を構成する(U相コイル30、V相コイル40およびW相コイル50のコイルエンドの形状を互いに異ならせる)ことにより、U相コイル30、V相コイル40およびW相コイル50は、互いに異なる形状でかつ互いに周長が略同じになるように構成されている。具体的には、まず、U相コイル30、V相コイル40およびW相コイル50は、ステータコア1aの軸方向の他方側のコイルエンド(矢印A2方向側)において、径方向内側に折り曲げられた折曲部35、43および54の径方向内側への突出量L1、L2およびL3を互いに異ならせることにより、互いに周長が略同じになるように構成されている。また、U相コイル30、V相コイル40およびW相コイル50は、ステータコア1aの軸方向の他方側のコイルエンドにおいて、突出量L1、L2およびL3に加えて、U相コイル30、V相コイル40およびW相コイル50の折曲部の形状(U相コイル30の折曲部35はL字形状、V相コイル40の折曲部43はS字形状、W相コイル50の折曲部54はS字形状)を異ならせることにより、互いに周長が略同じになるように構成されている。さらに、U相コイル30、V相コイル40およびW相コイル50は、U相コイル30、V相コイル40およびW相コイル50のそれぞれの連結部36、連結部44および連結部55のステータコア1aの周方向の長さ(L4、L5およびL6)を互いに異ならせることにより、互いに周長が略同じになるように構成されている。
As described above, by configuring the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 (the shapes of the coil ends of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are different from each other), The U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are configured to have mutually different shapes and substantially the same circumference. Specifically, first, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are folded inward in the radial direction at the coil end on the other axial side of the stator core 1 a (arrow A2 direction side). The circumferential lengths L1, L2, and L3 of the curved portions 35, 43, and 54 are different from each other so that the circumferential lengths are substantially the same. The U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are arranged at the coil end on the other axial side of the stator core 1a in addition to the protruding amounts L1, L2, and L3. 40 and the shape of the bent portion of the W-phase coil 50 (the bent portion 35 of the U-phase coil 30 is L-shaped, the bent portion 43 of the V-phase coil 40 is S-shaped, and the bent portion 54 of the W-phase coil 50 is Are different from each other in S shape, so that the circumferences are substantially the same. Furthermore, the U-phase coil 30, the V-phase coil 40 and the W-phase coil 50 are respectively connected to the stator core 1 a of the connecting portion 36, the connecting portion 44 and the connecting portion 55 of the U-phase coil 30, the V-phase coil 40 and the W-phase coil 50. By making the circumferential lengths (L4, L5 and L6) different from each other, the circumferential lengths are made substantially the same.
第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50を、互いに異なる形状でかつ互いに周長が略同じになるように構成する。これにより、同心巻でU相コイル30、V相コイル40およびW相コイル50をスロット11に装着する際に各コイルのコイルエンドが干渉しないように互いの形状を異ならせながら、U相コイル30、V相コイル40およびW相コイル50の電気的な抵抗を互いに略同じにすることができるので、U相コイル30、V相コイル40およびW相コイル50が互いに干渉するのを抑制しながら、電動機100が回転した際の脈動を抑制することができる。
In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are configured to have different shapes and substantially the same circumference. Accordingly, when the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are mounted concentrically on the slot 11, the U-phase coil 30 is made different in shape so that the coil ends of the coils do not interfere with each other. Since the electrical resistances of the V-phase coil 40 and the W-phase coil 50 can be made substantially the same, while suppressing the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 from interfering with each other, The pulsation when the electric motor 100 rotates can be suppressed.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50を、コイルエンドの形状を互いに異ならせることにより、互いに周長が略同じになるように構成する。これにより、U相コイル30、V相コイル40およびW相コイル50のコイルエンドの形状が互いに同じ場合と異なり、容易に、コイルエンドの長さを調整することができる。
In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 have substantially the same circumference by making the coil end shapes different from each other. Constitute. Thereby, unlike the case where the shape of the coil end of U phase coil 30, V phase coil 40, and W phase coil 50 is mutually the same, the length of a coil end can be adjusted easily.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50を、コイルエンドの折曲状態を互いに異ならせることにより形状を互いに異ならせて、互いに周長が略同じになるように構成する。これにより、コイルエンドの折曲状態を互いに異ならせることにより、容易にコイルエンドの長さが調整されるので、より容易に互いの周長を略同じにすることができる。
In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are made to have different shapes by making the coil ends bend different from each other, so that The length is configured to be substantially the same. Thereby, since the length of a coil end is easily adjusted by making the bending state of a coil end different from each other, it is possible to make the circumferential lengths of each other almost the same.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50のうちの少なくとも2つ(U相コイル30およびW相コイル50)を、ステータコア1aの軸方向の一方側のコイルエンドにおいて、ステータコア1aの半径方向の外側へ折り曲げて、U相コイル30、V相コイル40およびW相コイル50のうちの少なくとも2つ(U相コイル30およびW相コイル50)の連結部33および連結部53同士を軸方向に沿って重ねる。これにより、U相コイル30、V相コイル40およびW相コイル50の連結部33、連結部42および連結部53を重ねずに径方向にずらして配置する場合と異なり、電動機100の径方向の長さが大きくなるのを抑制することができる。
In the first embodiment, as described above, at least two of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 (the U-phase coil 30 and the W-phase coil 50) are connected to the shaft of the stator core 1a. At one coil end in the direction, the stator core 1a is bent outward in the radial direction, and at least two of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 (the U-phase coil 30 and the W-phase coil 50). ) Are overlapped along the axial direction. Thus, unlike the case where the connecting portion 33, the connecting portion 42, and the connecting portion 53 of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are shifted in the radial direction without overlapping, the radial direction of the electric motor 100 is increased. An increase in length can be suppressed.
また、第1実施形態では、上記のように、コイルを、平角導線を巻き重ねて積層した帯状のエッジワイズコイルから構成し、U相コイル30、V相コイル40およびW相コイル50を、少なくともステータコア1aの軸方向の他方側のコイルエンドにおいて、平角導線の積層方向に沿ってステータコア1aの半径方向(径方向)に互いに異なる形状になるように折り曲げる。これにより、エッジワイズコイルからなるU相コイル30、V相コイル40およびW相コイル50を、容易に、径方向に折り曲げることができる。
In the first embodiment, as described above, the coil is constituted by a band-shaped edgewise coil in which flat conductor wires are wound and laminated, and the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are at least At the other coil end in the axial direction of the stator core 1a, the stator core 1a is bent so as to have different shapes in the radial direction (radial direction) of the stator core 1a along the lamination direction of the rectangular conductive wires. Thereby, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50, which are edgewise coils, can be easily bent in the radial direction.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50を、ステータコア1aの軸方向の他方側のコイルエンドにおいて、ステータコア1aの径方向内側に折り曲げる。これにより、U相コイル30、V相コイル40およびW相コイル50がコイルエンドの両端において径方向外側に折り曲げられている場合と異なり、U相コイル30、V相コイル40およびW相コイル50をステータコア1aの軸方向に沿ってステータコア1aの軸方向の他方側のコイルエンド側からスロット11に挿入することができる。
In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are bent inward in the radial direction of the stator core 1a at the other coil end in the axial direction of the stator core 1a. . Thus, unlike the case where the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are bent radially outward at both ends of the coil end, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are It can be inserted into the slot 11 from the other coil end side in the axial direction of the stator core 1a along the axial direction of the stator core 1a.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50を、ステータコア1aの軸方向の他方側のコイルエンドにおいて、ステータコア1aの半径方向の内側に折り曲げ、かつ、ステータコア1aの軸方向に沿ってステータコア1aの軸方向の他方側のコイルエンド側からスロット11に挿入可能に構成する。これにより、コイルを径方向内側から外側に向かって移動させてスロット11に挿入する場合と異なり、電動機100の組み立て作業を容易に行うことができる。
In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are arranged inside the stator core 1 a in the radial direction at the coil end on the other axial side of the stator core 1 a. It is configured such that it can be bent and inserted into the slot 11 from the coil end side on the other side in the axial direction of the stator core 1a along the axial direction of the stator core 1a. Thereby, unlike the case where the coil is moved from the radially inner side to the outer side and inserted into the slot 11, the assembly work of the electric motor 100 can be easily performed.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50を、ステータコア1aの軸方向の他方側のコイルエンドにおいて、少なくともステータコア1aの半径方向の内側に折り曲げられた折曲部35、折曲部43および折曲部54のステータコア1aの半径方向の内側への突出量を互いに異ならせることにより、互いに周長が略同じになるように構成する。これにより、U相コイル30、V相コイル40およびW相コイル50の軸方向の長さを大きくすることなく、容易に、U相コイル30、V相コイル40およびW相コイル50の周長を互いに略同じにすることができる。
In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are arranged at least on the radially inner side of the stator core 1a at the other coil end in the axial direction of the stator core 1a. The circumferential lengths of the bent portion 35, the bent portion 43, and the bent portion 54 that are bent inward are made to be substantially the same by making the protrusion amounts of the stator core 1a inward in the radial direction different from each other. Thereby, without increasing the axial lengths of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50, the circumferential lengths of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 can be easily increased. They can be substantially the same as each other.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50を、ステータコア1aの軸方向の他方側のコイルエンドにおいて、突出量に加えて、U相コイル30、V相コイル40およびW相コイル50の折曲部35、折曲部43および折曲部54の形状を異ならせることにより、互いに周長が略同じになるように構成する。これにより、たとえば、径方向の大きさが比較的小さい電動機のように、径方向内側の突出量のみによってはU相コイル30、V相コイル40およびW相コイル50の周長を互いに略同じにすることができない場合でも、突出量に加えて、U相コイル30、V相コイル40およびW相コイル50の折曲部35、折曲部43および折曲部54の形状を異ならせることにより、容易に、周長を互いに略同じにすることができる。
In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are added to the U-phase in addition to the protruding amount at the other coil end in the axial direction of the stator core 1 a. By making the shapes of the bent portion 35, the bent portion 43, and the bent portion 54 of the coil 30, the V-phase coil 40, and the W-phase coil 50 different from each other, the circumferential lengths are made substantially the same. Thereby, for example, the peripheral lengths of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are made substantially the same depending on only the amount of protrusion on the radially inner side, such as an electric motor having a relatively small radial size. Even if it is not possible, in addition to the protrusion amount, by making the shapes of the bent portion 35, the bent portion 43 and the bent portion 54 of the U-phase coil 30, the V-phase coil 40 and the W-phase coil 50 different, It is easy to make the circumferences substantially the same.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50のステータコア1aの軸方向の他方側のコイルエンドにおける折曲部35、折曲部43および折曲部54を、略U字形状、略L字形状および略S字形状のうちの少なくとも1つを有するように構成する。これにより、容易に、U相コイル30、V相コイル40およびW相コイル50を、軸方向の他方側のコイルエンドにおいて、径方向内側に折り曲げた形状にすることができる。
Further, in the first embodiment, as described above, the bent portion 35, the bent portion 43, and the bent portion 35 at the coil end on the other side in the axial direction of the stator core 1a of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 The bent portion 54 is configured to have at least one of a substantially U shape, a substantially L shape, and a substantially S shape. Thereby, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 can be easily bent radially inward at the other coil end in the axial direction.
また、第1実施形態では、上記のように、U相コイル30の折曲部35を、略L字形状を有するとともに、ステータコア1aの半径方向の内側への突出量を最も小さくし、V相コイル40の折曲部43を、略S字形状を有するとともに、ステータコア1aの半径方向の内側への突出量を最も大きくし、W相コイル50の折曲部54を、略S字形状を有するとともに、ステータコア1aの半径方向の内側への突出量を、U相コイル30の折曲部35よりも大きく、V相コイル40の折曲部43よりも小さくする。これにより、容易に、U相コイル30、V相コイル40およびW相コイル50の折曲部35、折曲部43および折曲部54の形状を異ならせることができる。
In the first embodiment, as described above, the bent portion 35 of the U-phase coil 30 has a substantially L shape, and the amount of protrusion of the stator core 1a in the radial direction is minimized, so that the V-phase The bent portion 43 of the coil 40 has a substantially S shape, and the amount of protrusion of the stator core 1a in the radial direction is maximized, and the bent portion 54 of the W-phase coil 50 has a substantially S shape. At the same time, the amount of protrusion of the stator core 1 a inward in the radial direction is larger than the bent portion 35 of the U-phase coil 30 and smaller than the bent portion 43 of the V-phase coil 40. Thereby, the shape of the bending part 35 of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50, the bending part 43, and the bending part 54 can be varied easily.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50を、U相コイル30、V相コイル40およびW相コイル50のそれぞれの連結部36、連結部44および連結部55のステータコア1aの周方向の長さを互いに異ならせることにより、互いに周長が略同じになるように構成する。これにより、径方向内側の突出量および折曲部の形状を異ならせても、U相コイル30、V相コイル40およびW相コイル50の周長を互いに略同じにすることができない場合でも、径方向内側の突出量および折曲部の形状に加えて、さらに、U相コイル30、V相コイル40およびW相コイル50のそれぞれの連結部36、連結部44および連結部55のステータコア1aの周方向の長さを互いに異ならせることにより、容易に、周長を互いに略同じにすることができる。
In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are connected to the connecting portions 36 of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50, The circumferential lengths of the stator core 1a of the connecting portion 44 and the connecting portion 55 are made different from each other so that the circumferential lengths are substantially the same. Thereby, even when the amount of protrusion on the radially inner side and the shape of the bent portion are different, even when the circumferential lengths of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 cannot be made substantially the same, In addition to the radially inner protrusion amount and the shape of the bent portion, the connecting portion 36, the connecting portion 44, and the connecting portion 55 of the stator core 1a of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are further provided. By making the circumferential lengths different from each other, the circumferential lengths can be made substantially the same.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50の連結部36、連結部44および連結部55を、幅広の積層面fと、積層面fと直交する幅狭の端面とを有するように構成し、積層面fまたは端面eがステータコア1aの軸方向に面するように構成する。これにより、U相コイル30、V相コイル40およびW相コイル50の軸方向の端部を平坦面(積層面fまたは端面e)にすることができるので、U相コイル30、V相コイル40およびW相コイル50の軸方向の端部に衝突することに起因して、衝突した物が破損するのを抑制することができる。
In the first embodiment, as described above, the connecting portion 36, the connecting portion 44, and the connecting portion 55 of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are divided into the wide laminated surface f and the laminated surface. It is configured to have a narrow end surface orthogonal to f, and the stacked surface f or the end surface e is configured to face the axial direction of the stator core 1a. Thereby, since the axial direction edge part of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 can be made into a flat surface (lamination surface f or end surface e), the U-phase coil 30, the V-phase coil 40 Further, it is possible to suppress the colliding object from being damaged due to the collision with the axial end of the W-phase coil 50.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50を、ステータコア1aの軸方向の他方側のコイルエンドにおいて、ステータコア1aの径方向内側に折り曲げるとともに、一方側のコイルエンドにおいて、ステータコア1aの軸方向に沿って延びるかまたはステータコア1aの半径方向の外側に折り曲げる。これにより、U相コイル30、V相コイル40およびW相コイル50を、ステータコア1aの軸方向の両方側のコイルエンドにおいて、径方向内側に折り曲げる場合と異なり、ロータ2を容易に、ステータコア1aの内側に挿入することができる。
In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are bent inward in the radial direction of the stator core 1a at the other coil end in the axial direction of the stator core 1a. At the same time, the coil end on one side extends along the axial direction of the stator core 1a or bends outward in the radial direction of the stator core 1a. Thus, unlike the case where the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are bent radially inward at the coil ends on both sides in the axial direction of the stator core 1a, the rotor 2 can be easily connected to the stator core 1a. Can be inserted inside.
また、第1実施形態では、上記のように、U相コイル30、V相コイル40およびW相コイル50を、ステータコア1aの軸方向の他方側のコイルエンドにおいて、接触せずに互いに交差するように配置する。これにより、U相コイル30、V相コイル40およびW相コイル50が互いに接触することに起因して、U相コイル30、V相コイル40およびW相コイル50同士が短絡するのを抑制することができる。
In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 intersect with each other without contacting at the coil end on the other axial side of the stator core 1 a. To place. Thereby, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are prevented from being short-circuited due to the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 being in contact with each other. Can do.
(第2実施形態)
次に、図9~図14を参照して、第2実施形態による電動機200の構成について説明する。第2実施形態では、V相コイル40の連結部42とW相コイル50の連結部53とが径方向に沿って並ぶように配置されていた上記第1実施形態とは異なり、U相コイル130の連結部33、V相コイル140の連結部144およびW相コイル150の連結部53が軸方向に沿って並ぶように配置されている例について説明する。なお、電動機200は、「回転電機」の一例である。また、第2実施形態において上記第1実施形態と同様の構成については、同一符号を用いるとともに説明を省略する。 (Second Embodiment)
Next, the configuration of theelectric motor 200 according to the second embodiment will be described with reference to FIGS. In the second embodiment, unlike the first embodiment in which the connecting portion 42 of the V-phase coil 40 and the connecting portion 53 of the W-phase coil 50 are arranged along the radial direction, the U-phase coil 130. An example in which the connecting portion 33, the connecting portion 144 of the V-phase coil 140, and the connecting portion 53 of the W-phase coil 150 are arranged in the axial direction will be described. The electric motor 200 is an example of a “rotary electric machine”. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
次に、図9~図14を参照して、第2実施形態による電動機200の構成について説明する。第2実施形態では、V相コイル40の連結部42とW相コイル50の連結部53とが径方向に沿って並ぶように配置されていた上記第1実施形態とは異なり、U相コイル130の連結部33、V相コイル140の連結部144およびW相コイル150の連結部53が軸方向に沿って並ぶように配置されている例について説明する。なお、電動機200は、「回転電機」の一例である。また、第2実施形態において上記第1実施形態と同様の構成については、同一符号を用いるとともに説明を省略する。 (Second Embodiment)
Next, the configuration of the
図9に示すように、第2実施形態によるステータ101は、複数のコイル101b(U相コイル130、V相コイル140およびW相コイル150)を含む。なお、U相コイル130、V相コイル140およびW相コイル150は、それぞれ、「第1コイル」、「第2コイル」および「第3コイル」の一例である。また、ステータ101は、「回転電機用ステータ」の一例である。
As shown in FIG. 9, the stator 101 according to the second embodiment includes a plurality of coils 101b (a U-phase coil 130, a V-phase coil 140, and a W-phase coil 150). The U-phase coil 130, the V-phase coil 140, and the W-phase coil 150 are examples of “first coil”, “second coil”, and “third coil”, respectively. The stator 101 is an example of a “rotor electric machine stator”.
図9および図12に示すように、第2実施形態のU相コイル130は、一方側(矢印A1方向側)のコイルエンドにおいて、上記第1実施形態のU相コイル30と同一の形状を有する。また、U相コイル130は、他方側(矢印A2方向側)のコイルエンドにおいて、径方向内側に略S字形状に折り曲げられた一対の折曲部131と、一対の折曲部131同士を連結する連結部132とを含む。折曲部131の先端面131aは、軸方向外側を向くように形成されており、折曲部131の先端面131aのコア端面1cからの突出高さはH11である。また、折曲部131のステータコア1aの径方向内側への突出量L7は、後述するV相コイル140の折曲部145(折曲部146)の径方向内側への突出量L8(図13参照)よりも大きく、W相コイル150の折曲部151の径方向内側への突出量L9(図14参照)よりも小さい。なお、連結部132は、「第2連結部」の一例である。
As shown in FIGS. 9 and 12, the U-phase coil 130 of the second embodiment has the same shape as the U-phase coil 30 of the first embodiment at the coil end on one side (arrow A1 direction side). . The U-phase coil 130 connects the pair of bent portions 131 and the pair of bent portions 131 to each other at the coil end on the other side (arrow A2 direction side). Connecting part 132 to be included. The front end surface 131a of the bent portion 131 is formed to face outward in the axial direction, and the protruding height of the front end surface 131a of the bent portion 131 from the core end surface 1c is H11. Further, a protruding amount L7 of the bent portion 131 to the radially inner side of the stator core 1a is a protruding amount L8 of the bent portion 145 (folded portion 146) of the V-phase coil 140 described later to the radially inner side (see FIG. 13). ) And smaller than the protruding amount L9 (see FIG. 14) of the bent portion 151 of the W-phase coil 150 inward in the radial direction. The connecting portion 132 is an example of a “second connecting portion”.
連結部132は、周方向に沿って延びるように形成され、エッジワイズコイルの積層面fがロータ2の軸方向端面と対向し、かつ、略平行になるように形成されている。また、連結部132は、ステータコア1aの径方向内側でステータコア1aとは軸方向に重ならないように配置されている。また、第2実施形態では、連結部132の周方向の長さL10は、後述するV相コイル140の連結部145の周方向の長さL11(図13参照)よりも大きく、W相コイル150の連結部151の周方向の長さL12(図14参照)よりも小さい。U相コイル130の他方側のコイルエンドでは、一対の折曲部131と連結部132とにより、軸方向内側が開放された凹状部133が形成されている。
The connecting portion 132 is formed so as to extend along the circumferential direction, and is formed so that the laminated surface f of the edgewise coil is opposed to the axial end surface of the rotor 2 and is substantially parallel. Further, the connecting portion 132 is disposed on the radially inner side of the stator core 1a so as not to overlap the stator core 1a in the axial direction. In the second embodiment, the circumferential length L10 of the connecting portion 132 is larger than the circumferential length L11 (see FIG. 13) of the connecting portion 145 of the V-phase coil 140, which will be described later, and the W-phase coil 150. The connecting portion 151 is smaller than the circumferential length L12 (see FIG. 14). At the coil end on the other side of the U-phase coil 130, the pair of bent portions 131 and the connecting portion 132 form a concave portion 133 whose inner side in the axial direction is open.
図9および図13に示すように、V相コイル140は、軸方向に延びてそれぞれ異なるスロット11に挿入される一対のコイル辺部141を有する。また、V相コイル140は、コイルエンドにおいて、一方のコイル辺部141から連続する折曲部142と、他方のコイル辺部141から連続する折曲部143と、折曲部142および折曲部143を連結する連結部144とを有する。なお、コイル辺部141は、「軸方向部分」の一例である。また、連結部144は、「第1連結部」の一例である。
As shown in FIGS. 9 and 13, the V-phase coil 140 has a pair of coil sides 141 that extend in the axial direction and are inserted into different slots 11. In addition, the V-phase coil 140 includes, at the coil end, a bent portion 142 that is continuous from one coil side portion 141, a bent portion 143 that is continuous from the other coil side portion 141, a bent portion 142, and a bent portion. And a connecting portion 144 for connecting 143. The coil side portion 141 is an example of an “axial portion”. The connecting portion 144 is an example of a “first connecting portion”.
折曲部142は、径方向外側で、かつ、折曲部142の先端面142aがU相コイル130の連結部33側(コア端面1c側)に向けて折り返されており、U相コイル130の折曲部32と同様の略U字形状を有する。折曲部142の突出高さはH13は、折曲部32の突出高さはH12(図12参照)よりも大きい。折曲部142の先端面142aは、U相コイル130の一対の折曲部32と連結部33とによって形成された凹状部34の内部で、かつ、連結部33の近傍の位置に配置されている。
The bent portion 142 is radially outward, and the distal end surface 142a of the bent portion 142 is folded back toward the connecting portion 33 side (core end surface 1c side) of the U-phase coil 130. It has a substantially U shape similar to that of the bent portion 32. The protruding height of the bent portion 142 is H13, and the protruding height of the bent portion 32 is larger than H12 (see FIG. 12). The front end surface 142 a of the bent portion 142 is disposed inside the concave portion 34 formed by the pair of bent portions 32 of the U-phase coil 130 and the connecting portion 33 and at a position near the connecting portion 33. Yes.
折曲部143は、スロット11から軸方向に突出したコイル辺部141がコイルエンドにおいて径方向外側で、かつ、折曲部143の先端面143aがU相コイル130の連結部33とは反対側(軸方向外側)に向けて折り曲げられており、略S字形状に形成されている。具体的には、折曲部143は、平角導線の積層方向(径方向)に沿って略90度で外折りされた後、略90度で内折りされることにより、略S字形状に形成されている。折曲部143の先端面143aは、コア端面1cとは反対側(軸方向外側)を向いている。折曲部143の先端面143aの突出高さは、折曲部142の突出高さH13と一致する。また、折曲部143は、折曲部142とは別のU相コイル130(隣接するU相コイル130)の凹状部34の内部に配置されている。
The bent portion 143 is such that the coil side portion 141 protruding in the axial direction from the slot 11 is radially outward at the coil end, and the distal end surface 143a of the bent portion 143 is opposite to the connecting portion 33 of the U-phase coil 130. It is bent toward (outside in the axial direction) and has a substantially S shape. Specifically, the bent portion 143 is formed into a substantially S-shape by being folded outward at approximately 90 degrees along the stacking direction (radial direction) of the flat wire, and then internally folded at approximately 90 degrees. Has been. The front end surface 143a of the bent portion 143 faces the opposite side (axially outer side) from the core end surface 1c. The protruding height of the front end surface 143a of the bent portion 143 is equal to the protruding height H13 of the bent portion 142. In addition, bent portion 143 is arranged inside concave portion 34 of U-phase coil 130 (adjacent U-phase coil 130) different from bent portion 142.
連結部144は、コア端面1c側(連結部33側)を向いた折曲部142の先端部と、コア端面1cとは反対側を向いた折曲部143の先端部とを連結するように形成されている。また、第2実施形態では、連結部144は、径方向から見て、軸方向外側が開放された凹状の第1部分144aと、U相コイル130の折曲部32を跨ぐ凸状の第2部分144bとを含む段差状形状を有する。凹状の第1部分144aは、折曲部142の先端部と連結することにより、U相コイル130の凹状部34内で連結部33の近傍に配置されている。凸状の第2部分144bは、折曲部143の先端部と連結することによりU相コイル130の折曲部32を軸方向外側から跨ぐように形成されている。第1部分144aおよび第2部分144bは、中央の段差部分を除き、エッジワイズコイルの積層面fがコア端面1cと対向し、コア端面1cと略平行で、かつ、周方向に沿って延びるように形成されている。以上により、図10に示すように、連結部144は、U相コイル130の連結部33と軸方向に重なるように配置されている。
The connecting portion 144 connects the distal end portion of the bent portion 142 facing the core end surface 1c side (connecting portion 33 side) and the distal end portion of the bent portion 143 facing the opposite side of the core end surface 1c. Is formed. Further, in the second embodiment, the connecting portion 144 is a convex second portion straddling the concave first portion 144a whose outer side in the axial direction is opened and the bent portion 32 of the U-phase coil 130 when viewed from the radial direction. It has a stepped shape including the portion 144b. The concave first portion 144 a is arranged in the vicinity of the coupling portion 33 in the concave portion 34 of the U-phase coil 130 by coupling with the distal end portion of the bent portion 142. The convex second portion 144b is formed so as to straddle the bent portion 32 of the U-phase coil 130 from the outside in the axial direction by being connected to the distal end portion of the bent portion 143. The first portion 144a and the second portion 144b are arranged so that the laminated surface f of the edgewise coil faces the core end surface 1c, is substantially parallel to the core end surface 1c, and extends in the circumferential direction, except for the central step portion. Is formed. As described above, as shown in FIG. 10, the connecting portion 144 is disposed so as to overlap the connecting portion 33 of the U-phase coil 130 in the axial direction.
図9および図13に示すように、V相コイル140は、他方側のコイルエンドでは、径方向内側に略S字形状に折り曲げられた折曲部145と、径方向内側に略U字形状に折り返された折曲部146と、折曲部145の先端部および折曲部146の先端部を連結する連結部147とを含む。ここで、一方側のコイルエンドにおける略S字形状の折曲部143の反対側(他方側)には、略U字形状の折曲部146が形成されている。また、一方側のコイルエンドにおける略U字形状の折曲部142の反対側(他方側)には、略S字形状の折曲部145が形成されている。また、第2実施形態では、折曲部145(折曲部146)のステータコア1aの径方向内側への突出量L8は、U相コイル130の折曲部131の径方向内側への突出量L7(図12参照)、および、後述するW相コイル150の折曲部151の径方向内側への突出量L9(図14参照)に比べて、最も小さい。なお、連結部147は、「第2連結部」の一例である。
As shown in FIGS. 9 and 13, the V-phase coil 140 has a bent portion 145 that is bent in a substantially S shape radially inward and a substantially U shape radially inward at the coil end on the other side. The folded portion 146 that is folded back, and the connecting portion 147 that connects the distal end portion of the bent portion 145 and the distal end portion of the bent portion 146 are included. Here, a substantially U-shaped bent portion 146 is formed on the opposite side (the other side) of the substantially S-shaped bent portion 143 in the coil end on one side. A substantially S-shaped bent portion 145 is formed on the opposite side (the other side) of the substantially U-shaped bent portion 142 in the coil end on one side. Further, in the second embodiment, the protruding amount L8 of the bent portion 145 (the bent portion 146) to the radially inner side of the stator core 1a is the protruding amount L7 of the bent portion 131 of the U-phase coil 130 to the radially inner side. (See FIG. 12) and the amount of protrusion L9 (see FIG. 14) inward in the radial direction of the bent portion 151 of the W-phase coil 150 to be described later is the smallest. The connecting portion 147 is an example of a “second connecting portion”.
連結部147は、径方向から見て、軸方向内側が開放された凹状の第1部分147aと、軸方向外側が開放された凸状の第2部分147bとを含む段差状形状を有する。第1部分147aおよび第2部分147bは、周方向に沿って延びるように形成され、中央の段差部分を除き、エッジワイズコイルの積層面fがロータ2の軸方向端面と対向し、かつ、略平行になるように形成されている。また、第2実施形態では、V相コイル140の連結部147の周方向の長さL11は、U相コイル130の連結部132の周方向の長さL10(図12参照)、および、後述するW相コイル150の連結部152の周方向の長さL12(図14参照)に比べて、最も大きい。また、連結部147は、ステータコア1aの径方向内側でステータコア1aとは軸方向に重ならないように配置されている。また、凹状の第1部分147a内にU相コイル130の折曲部131が配置されている。
The connecting portion 147 has a stepped shape including a concave first portion 147a whose inner side in the axial direction is opened and a convex second portion 147b whose outer side in the axial direction is opened as viewed from the radial direction. The first portion 147a and the second portion 147b are formed so as to extend along the circumferential direction, except for the step portion at the center, the laminated surface f of the edgewise coil is opposed to the axial end surface of the rotor 2, and substantially It is formed to be parallel. In the second embodiment, the circumferential length L11 of the connecting portion 147 of the V-phase coil 140 is the circumferential length L10 of the connecting portion 132 of the U-phase coil 130 (see FIG. 12), and will be described later. Compared to the circumferential length L12 of the connecting portion 152 of the W-phase coil 150 (see FIG. 14), it is the largest. Moreover, the connection part 147 is arrange | positioned so that it may not overlap with an axial direction with the stator core 1a inside the radial direction of the stator core 1a. Further, the bent portion 131 of the U-phase coil 130 is disposed in the concave first portion 147a.
図9および図14に示すように、W相コイル150は、一方側(矢印A1方向側)のコイルエンドにおいて、上記第1実施形態のW相コイル50と同一の形状を有する。また、W相コイル150は、他方側(矢印A2方向側)のコイルエンドでは、径方向内側に略L字形状に折り曲げられた一対の折曲部151と、一対の折曲部151の先端部を連結する連結部152とを含む。なお、連結部152は、「第2連結部」の一例である。
As shown in FIGS. 9 and 14, the W-phase coil 150 has the same shape as the W-phase coil 50 of the first embodiment at the coil end on one side (arrow A1 direction side). The W-phase coil 150 has a pair of bent portions 151 that are bent in a substantially L shape radially inward at the coil end on the other side (arrow A2 direction side), and tip portions of the pair of bent portions 151. And a connecting portion 152 for connecting the two. The connecting portion 152 is an example of a “second connecting portion”.
一対の折曲部151は、径方向内側に向けて直線状に延びるとともに、V相コイル140の凹状の第1部分147aの内部(軸方向内側)に収まるように配置されている。さらに、折曲部151は、U相コイル130の凹状部133の内部(軸方向内側)に収まるように配置されている。また、折曲部151は、U相コイル130の連結部132の軸方向内側を通り、V相コイル140の連結部147およびU相コイル130の連結部132よりも径方向内側まで延びる。また、第2実施形態では、折曲部151のステータコア1aの径方向内側への突出量L9は、U相コイル130の折曲部131の径方向内側への突出量L7(図12参照)、および、V相コイル140の折曲部145(折曲部146)の径方向内側への突出量L8(図13参照)に比べて、最も大きい。
The pair of bent portions 151 extend linearly inward in the radial direction and are disposed so as to fit inside the concave first portion 147a of the V-phase coil 140 (inward in the axial direction). Further, the bent portion 151 is disposed so as to be accommodated inside the concave portion 133 (the inner side in the axial direction) of the U-phase coil 130. Further, the bent portion 151 passes through the inner side in the axial direction of the connecting portion 132 of the U-phase coil 130 and extends further inward in the radial direction than the connecting portion 147 of the V-phase coil 140 and the connecting portion 132 of the U-phase coil 130. Moreover, in 2nd Embodiment, the protrusion amount L9 to the radial inside of the stator core 1a of the bending part 151 is the protrusion amount L7 (refer FIG. 12) to the radial inside of the bending part 131 of the U-phase coil 130, And it is the largest compared with the protrusion amount L8 (refer FIG. 13) to the radial inside of the bending part 145 (bending part 146) of the V-phase coil 140.
連結部152は、周方向に沿って延びるように形成され、V相コイル140の連結部147およびU相コイル130の連結部132よりも径方向内側の位置に配置されている。すなわち、図11に示すように、軸方向から見て、V相コイル140の連結部147と、U相コイル130の連結部132と、W相コイル150の連結部152とは、径方向外側から内側に向かってこの順で配置されている。また、図14に示すように、連結部152は、エッジワイズコイルの端面eが軸方向を向いてロータ2の軸方向端面と対向し、かつ、略平行になるように形成されている。また、連結部152は、ステータコア1aの径方向内側でステータコア1aとは軸方向に重ならないように配置されている。また、第2実施形態では、W相コイル150の連結部152の周方向の長さL12は、U相コイル130の連結部132の周方向の長さL10(図12参照)、および、V相コイル140の連結部147の周方向の長さL11(図13参照)に比べて、最も小さい。
The connecting portion 152 is formed so as to extend along the circumferential direction, and is disposed at a position radially inward of the connecting portion 147 of the V-phase coil 140 and the connecting portion 132 of the U-phase coil 130. That is, as shown in FIG. 11, when viewed from the axial direction, the connecting portion 147 of the V-phase coil 140, the connecting portion 132 of the U-phase coil 130, and the connecting portion 152 of the W-phase coil 150 are from the radially outer side. They are arranged in this order toward the inside. As shown in FIG. 14, the connecting portion 152 is formed so that the end face e of the edgewise coil faces the axial direction, faces the axial end face of the rotor 2, and is substantially parallel. Further, the connecting portion 152 is disposed on the radially inner side of the stator core 1a so as not to overlap the stator core 1a in the axial direction. In the second embodiment, the circumferential length L12 of the connecting portion 152 of the W-phase coil 150 is equal to the circumferential length L10 of the connecting portion 132 of the U-phase coil 130 (see FIG. 12) and the V-phase. Compared to the circumferential length L11 of the coupling portion 147 of the coil 140 (see FIG. 13), it is the smallest.
第2実施形態のステータ101の他端側のコイルエンドにおける最大の突出高さは、U相コイル130の折曲部131の先端面131aの突出高さH11である。したがって、各相のコイルエンドが、突出高さH11のU相コイル130の凹状部133よりも軸方向内側に納まるように配置されている。
The maximum protrusion height at the coil end on the other end side of the stator 101 of the second embodiment is the protrusion height H11 of the tip surface 131a of the bent portion 131 of the U-phase coil 130. Therefore, the coil ends of the respective phases are arranged so as to be located on the inner side in the axial direction from the concave portion 133 of the U-phase coil 130 having the protruding height H11.
以上のように、U相コイル130、V相コイル140およびW相コイル150を構成することにより、U相コイル130、V相コイル140およびW相コイル150は、互いに異なる形状でかつ互いに周長が略同じになるように構成されている。具体的には、U相コイル130、V相コイル140およびW相コイル150は、ステータコア1aの軸方向の他方側のコイルエンド(矢印A2方向側)において、径方向内側に折り曲げられた折曲部131、145(146)および151の径方向内側への突出量L7、L8およびL9を互いに異ならせ、折曲部の形状(U相コイル130の折曲部131はS字形状、V相コイル140の折曲部145はS字形状、折曲部146はU字形状、W相コイル150の折曲部151はL字形状)を互いに異ならせ、さらに、連結部132、連結部147および連結部152のステータコア1aの周方向の長さ(L10、L11およびL12)を互いに異ならせることにより、互いに周長が略同じになるように構成されている。
As described above, by configuring the U-phase coil 130, the V-phase coil 140, and the W-phase coil 150, the U-phase coil 130, the V-phase coil 140, and the W-phase coil 150 have shapes different from each other and have circumferential lengths. It is comprised so that it may become substantially the same. Specifically, the U-phase coil 130, the V-phase coil 140, and the W-phase coil 150 are bent portions that are bent radially inward at the other coil end (arrow A2 direction side) in the axial direction of the stator core 1a. 131, 145 (146) and 151 projecting amounts L7, L8 and L9 inward in the radial direction are made different from each other, and the shape of the bent portion (the bent portion 131 of the U-phase coil 130 is S-shaped, and the V-phase coil 140 is The bent portion 145 is S-shaped, the bent portion 146 is U-shaped, and the bent portion 151 of the W-phase coil 150 is L-shaped). Further, the connecting portion 132, the connecting portion 147, and the connecting portion The circumferential lengths (L10, L11, and L12) of the stator core 1a of 152 are made different from each other so that the circumferential lengths are substantially the same.
第2実施形態のその他の構成は、上記第1実施形態と同様である。
Other configurations of the second embodiment are the same as those of the first embodiment.
第2実施形態では、上記のように、V相コイル140の連結部147を、凹状の第1部分147aと凸状の第2部分147bとを含むように構成し、V相コイル140の凸状の第2部分147bを、U相コイル130の折曲部131を跨ぐように配置する。これにより、U相コイル130とV相コイル140とが衝突することなく、U相コイル130の折曲部131を径方向内側に突出させることができる。
In the second embodiment, as described above, the connecting portion 147 of the V-phase coil 140 is configured to include the concave first portion 147a and the convex second portion 147b, and the convex shape of the V-phase coil 140 is formed. The second portion 147b of the U-phase coil 130 is disposed so as to straddle the second portion 147b. Thereby, the bending part 131 of the U-phase coil 130 can be protruded radially inward without the U-phase coil 130 and the V-phase coil 140 colliding with each other.
第2実施形態のその他の効果は、上記第1実施形態と同様である。
Other effects of the second embodiment are the same as those of the first embodiment.
(第3実施形態)
次に、図15~図19を参照して、第3実施形態による電動機300の構成について説明する。第3実施形態では、両端のコイルエンドが非対称形状となる(一方が径方向外側に折り曲げられているとともに他方が径方向内側に折り曲げられている)ように構成した上記第1および第2実施形態とは異なり、両端のコイルエンドが略同一形状(略対称形状)となるように形成した例について説明する。なお、電動機300は、「回転電機」の一例である。また、第3実施形態において上記第1および第2実施形態と同様の構成については、同一符号を用いるとともに説明を省略する。 (Third embodiment)
Next, the configuration of theelectric motor 300 according to the third embodiment will be described with reference to FIGS. In the third embodiment, the first and second embodiments are configured such that the coil ends at both ends are asymmetrical (one is bent radially outward and the other is bent radially inner). Unlike the above, an example will be described in which the coil ends at both ends have substantially the same shape (substantially symmetrical shape). The electric motor 300 is an example of a “rotary electric machine”. In the third embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.
次に、図15~図19を参照して、第3実施形態による電動機300の構成について説明する。第3実施形態では、両端のコイルエンドが非対称形状となる(一方が径方向外側に折り曲げられているとともに他方が径方向内側に折り曲げられている)ように構成した上記第1および第2実施形態とは異なり、両端のコイルエンドが略同一形状(略対称形状)となるように形成した例について説明する。なお、電動機300は、「回転電機」の一例である。また、第3実施形態において上記第1および第2実施形態と同様の構成については、同一符号を用いるとともに説明を省略する。 (Third embodiment)
Next, the configuration of the
図15に示すように、第3実施形態によるステータ201は、複数のコイル201b(U相コイル230、V相コイル240およびW相コイル250)を含む。なお、U相コイル230、V相コイル240およびW相コイル250は、それぞれ、「第1コイル」、「第2コイル」および「第3コイル」の一例である。また、ステータ201は、「回転電機用ステータ」の一例である。
As shown in FIG. 15, the stator 201 according to the third embodiment includes a plurality of coils 201b (a U-phase coil 230, a V-phase coil 240, and a W-phase coil 250). The U-phase coil 230, the V-phase coil 240, and the W-phase coil 250 are examples of “first coil”, “second coil”, and “third coil”, respectively. The stator 201 is an example of a “rotor electric machine stator”.
図15および図17に示すように、U相コイル230は、コイルエンドの一方側(矢印A1方向側)および他方側(矢印A2方向側)において、一対のコイル辺部231に接続される略L字形状の一対の折曲部232と、一対の折曲部232の先端部を連結する連結部233とを含む。連結部232は、エッジワイズコイルの端面eがコア端面1cと対向するように形成されている。また、図15および図16に示すように、連結部233は、後述するV相コイル240の連結部244およびW相コイル250の連結部253よりも径方向外側に配置されている。なお、コイル辺部231は、「軸方向部分」の一例である。また、連結部233は、「第1連結部」の一例である。
As shown in FIGS. 15 and 17, the U-phase coil 230 is substantially L connected to a pair of coil side portions 231 on one side (arrow A1 direction side) and the other side (arrow A2 direction side) of the coil end. A pair of bent portions 232 having a letter shape and a connecting portion 233 for connecting the tip portions of the pair of bent portions 232 are included. The connecting portion 232 is formed so that the end face e of the edgewise coil faces the core end face 1c. Further, as shown in FIGS. 15 and 16, connecting portion 233 is arranged radially outside of connecting portion 244 of V-phase coil 240 and connecting portion 253 of W-phase coil 250 described later. The coil side portion 231 is an example of an “axial portion”. The connecting portion 233 is an example of a “first connecting portion”.
図15および図18に示すように、V相コイル240は、コイルエンドの一方側(矢印A1方向側)および他方側(矢印A2方向側)において、コイル辺部241の一方に接続される径方向外側に略S字形状に折り曲げられた折曲部242と、径方向外側に略U字形状に折り返された折曲部243と、折曲部242の先端部および折曲部243の先端部を連結する連結部244とを含む。また、連結部244は、径方向から見て、軸方向外側が開放された凹状の第1部分245と、軸方向内側が開放された凸状の第2部分246とを含む段差状形状を有する。第1部分245および第2部分246は、周方向に沿って延びるように形成され、中央の段差部分を除き、エッジワイズコイルの積層面fがロータ2の軸方向端面と対向し、かつ、略平行になるように形成されている。また、V相コイル240の凸状の第2部分246は、U相コイル230の折曲部232を跨ぐように配置されている。また、後述するW相コイル250の折曲部252は、V相コイル240の凹状の第1部分245を跨ぐように配置されている。なお、コイル辺部241は、「軸方向部分」の一例である。また、連結部244は、「第1連結部」の一例である。
As shown in FIGS. 15 and 18, the V-phase coil 240 is radially connected to one of the coil side portions 241 on one side (arrow A1 direction side) and the other side (arrow A2 direction side) of the coil end. A bent portion 242 bent in a substantially S shape on the outer side, a bent portion 243 folded back in a substantially U shape on the radially outer side, a distal end portion of the bent portion 242 and a distal end portion of the bent portion 243 And a connecting portion 244 to be connected. In addition, the connecting portion 244 has a stepped shape including a concave first portion 245 that is open on the outer side in the axial direction and a convex second portion 246 that is open on the inner side in the axial direction when viewed from the radial direction. . The first portion 245 and the second portion 246 are formed so as to extend along the circumferential direction, except for the step portion at the center, the laminated surface f of the edgewise coil is opposed to the axial end surface of the rotor 2, and substantially It is formed to be parallel. Further, the convex second portion 246 of the V-phase coil 240 is arranged so as to straddle the bent portion 232 of the U-phase coil 230. Further, a bent portion 252 of the W-phase coil 250 to be described later is arranged so as to straddle the concave first portion 245 of the V-phase coil 240. The coil side 241 is an example of an “axial portion”. The connecting portion 244 is an example of a “first connecting portion”.
図15および図19に示すように、W相コイル250は、コイルエンドの一方側(矢印A1方向側)および他方側(矢印A2方向側)において、一対のコイル辺部251から連続し、径方向外側に略S字形状に折り曲げられた一対の折曲部252と、一対の折曲部252を連結する連結部253とを有している。また、第3実施形態では、図15および図16に示すように、W相コイル250の連結部253と、V相コイル240の連結部244とは、互いに所定の間隔を隔てて、軸方向に沿って重なるように配置されている。なお、コイル辺部251は、「軸方向部分」の一例である。また、連結部253は、「第1連結部」の一例である。
As shown in FIG. 15 and FIG. 19, the W-phase coil 250 is continuous from the pair of coil side portions 251 on one side (arrow A1 direction side) and the other side (arrow A2 direction side) of the coil end. It has a pair of bending part 252 bent by the substantially S shape outside, and the connection part 253 which connects a pair of bending part 252. In the third embodiment, as shown in FIGS. 15 and 16, the connecting portion 253 of the W-phase coil 250 and the connecting portion 244 of the V-phase coil 240 are spaced apart from each other in the axial direction. It is arranged to overlap along. The coil side 251 is an example of an “axial portion”. The connecting portion 253 is an example of a “first connecting portion”.
以上のように、U相コイル230、V相コイル240およびW相コイル250を構成することにより、U相コイル230、V相コイル240およびW相コイル250は、互いに異なる形状でかつ互いに周長が略同じになるように構成されている。具体的には、U相コイル230、V相コイル240およびW相コイル250は、U相コイル230の折曲部232のステータコア1aの径方向外側への突出量L13と、V相コイル240の凹状の第1部分245と凸状の第2部分246とを接続する接続部分247の長さL14と、W相コイル50の折曲部252のステータコア1aの軸方向の突出量L15(折曲部252の直線状の部分の長さL15aおよびL15b)とを調整することにより、互いに周長が略同じになるように構成されている。
As described above, by configuring the U-phase coil 230, the V-phase coil 240, and the W-phase coil 250, the U-phase coil 230, the V-phase coil 240, and the W-phase coil 250 have shapes different from each other and have circumferential lengths. It is comprised so that it may become substantially the same. Specifically, U-phase coil 230, V-phase coil 240, and W-phase coil 250 have a protruding amount L 13 of the bent portion 232 of U-phase coil 230 protruding outward in the radial direction of stator core 1 a and a concave shape of V-phase coil 240. The length L14 of the connecting portion 247 that connects the first portion 245 and the convex second portion 246, and the protrusion L15 in the axial direction of the stator core 1a of the bent portion 252 of the W-phase coil 50 (the bent portion 252). By adjusting the lengths L15a and L15b) of the linear portions, the circumferential lengths are substantially the same.
第3実施形態の効果は、上記第1および第2実施形態と同様である。
The effect of the third embodiment is the same as that of the first and second embodiments.
(第4実施形態)
次に、図20および図21を参照して、第4実施形態による電動機400の構成について説明する。第4実施形態では、上記第1~第3実施形態の各相のコイルに低高速用コイル部と低速用コイル部とを設けた例ついて説明する。なお、電動機400は、「回転電機」の一例である。 (Fourth embodiment)
Next, with reference to FIG. 20 and FIG. 21, the structure of theelectric motor 400 by 4th Embodiment is demonstrated. In the fourth embodiment, an example will be described in which a low-speed coil portion and a low-speed coil portion are provided in the coils of the respective phases of the first to third embodiments. The electric motor 400 is an example of a “rotary electric machine”.
次に、図20および図21を参照して、第4実施形態による電動機400の構成について説明する。第4実施形態では、上記第1~第3実施形態の各相のコイルに低高速用コイル部と低速用コイル部とを設けた例ついて説明する。なお、電動機400は、「回転電機」の一例である。 (Fourth embodiment)
Next, with reference to FIG. 20 and FIG. 21, the structure of the
第4実施形態では、各相のコイル形状は任意であり、上記第1~第3実施形態で示したコイル形状のいずれにも適用することが可能である。そのため、ここでは、上記第1実施形態のコイル(U相コイル30、V相コイル40およびW相コイル50)に第4実施形態の構成を適用した例について説明する。
In the fourth embodiment, the coil shape of each phase is arbitrary, and can be applied to any of the coil shapes shown in the first to third embodiments. Therefore, here, an example in which the configuration of the fourth embodiment is applied to the coils of the first embodiment (the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50) will be described.
図20に示すように、第4実施形態によるステータ401では、U相コイル30、V相コイル40およびW相コイル50から構成される各コイル401bが、それぞれ、低高速用コイル部460と低速用コイル部470とを含んでいる。具体的には、各コイル401bでは、積層された平角導線のうち、一部が低高速用コイル部460を構成し、他の一部が低速用コイル部470を構成している。これらの低高速用コイル部460と低速用コイル部470とは、絶縁部材480によって互いに分離されている。これにより、各コイル401bは、低高速用コイル部460と低速用コイル部470とが共通のスロット11内に配置されるように構成されている。なお、ステータ401は、「回転電機用ステータ」の一例である。
As shown in FIG. 20, in the stator 401 according to the fourth embodiment, the coils 401b composed of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are respectively connected to the low-speed coil section 460 and the low-speed coil section. A coil portion 470. Specifically, in each coil 401 b, a part of the laminated rectangular conductor wire constitutes a low-speed coil part 460 and the other part constitutes a low-speed coil part 470. The low-speed coil portion 460 and the low-speed coil portion 470 are separated from each other by an insulating member 480. Thus, each coil 401 b is configured such that the low-speed coil portion 460 and the low-speed coil portion 470 are arranged in the common slot 11. The stator 401 is an example of a “rotor electric machine stator”.
各コイル401bの低高速用コイル部460は、電動機400の低速駆動時および高速駆動時の両方で使用され、低速用コイル部470は、電動機400の低速駆動時にのみ使用されるように構成されている。これらの低高速用コイル部460および低速用コイル部470は、図21に示すように、巻線切替部CSによって接続状態を切替可能である。
The low speed / high speed coil section 460 of each coil 401b is used both when the electric motor 400 is driven at low speed and during high speed driving, and the low speed coil section 470 is configured to be used only when the electric motor 400 is driven at low speed. Yes. These low-speed coil section 460 and low-speed coil section 470 can be switched in a connection state by a winding switching section CS as shown in FIG.
具体的には、電動機400は、電源部BUおよび巻線切替部CSとそれぞれ接続される。電動機400は、電源部BUから供給される3相の交流電力に対応して駆動するように構成されている。
Specifically, the electric motor 400 is connected to the power supply unit BU and the winding switching unit CS, respectively. The electric motor 400 is configured to be driven in response to three-phase AC power supplied from the power supply unit BU.
各コイル401bの低高速用コイル部460および低速用コイル部470は、電気的に直列に接続されている。低高速用コイル部460の一方側の端子TU1、TV1およびTW1は、電源部BUに接続されている。また、低高速用コイル部460の他方側で、かつ、低速用コイル部470の一方側の端子TU2、TV2およびTW2は、巻線切替部CSに接続されている。また、低速用コイル部470の他方側の端子TU3、TV3およびTW3は、巻線切替部CSに接続されている。
The low speed coil section 460 and the low speed coil section 470 of each coil 401b are electrically connected in series. Terminals TU1, TV1, and TW1 on one side of the low-speed coil unit 460 are connected to the power supply unit BU. Further, terminals TU2, TV2 and TW2 on the other side of the low-speed coil unit 460 and on one side of the low-speed coil unit 470 are connected to the winding switching unit CS. The terminals TU3, TV3, and TW3 on the other side of the low speed coil unit 470 are connected to the winding switching unit CS.
巻線切替部CSは、電動機400の端子TU2、TV2およびTW2を短絡させるための高速用スイッチSW1と、電動機400の端子TU3、TV3およびTW3を短絡させるための低速用スイッチSW2とを含む。
Winding switching unit CS includes a high-speed switch SW1 for short-circuiting terminals TU2, TV2 and TW2 of electric motor 400 and a low-speed switch SW2 for short-circuiting terminals TU3, TV3 and TW3 of electric motor 400.
巻線切替部CSは、低速駆動時には、高速用スイッチSW1をオフ状態にするとともに、低速用スイッチSW2をオン状態にする。この結果、端子TU3、TV3およびTW3が短絡され、電動機400の各相のコイル401bにおいて低高速用コイル部460および低速用コイル部470の両方に電圧が印加される。これにより、各相のコイル401bのインピーダンスが大きくなるので、コイル401bに大きな電圧を印加することができ、低速駆動時の電動機400のトルクを大きくすることが可能である。
The winding switching unit CS turns off the high-speed switch SW1 and turns on the low-speed switch SW2 during low-speed driving. As a result, the terminals TU3, TV3, and TW3 are short-circuited, and a voltage is applied to both the low-speed coil unit 460 and the low-speed coil unit 470 in each phase coil 401b of the electric motor 400. Thereby, since the impedance of the coil 401b of each phase becomes large, a large voltage can be applied to the coil 401b, and the torque of the electric motor 400 during low speed driving can be increased.
また、巻線切替部CSは、高速駆動時には、高速用スイッチSW1をオン状態にするとともに、低速用スイッチSW2をオフ状態にする。この結果、端子TU2、TV2およびTW2が短絡され、電動機400の各相のコイル401bにおいて低高速用コイル部460のみに電圧が印加される。この結果、低速駆動時に比べて、各相のコイル401bのインピーダンスが小さくなるので、電動機400を高速駆動することが可能である。
The winding switching unit CS turns on the high-speed switch SW1 and turns off the low-speed switch SW2 during high-speed driving. As a result, the terminals TU2, TV2, and TW2 are short-circuited, and a voltage is applied only to the low-speed coil section 460 in each phase coil 401b of the electric motor 400. As a result, since the impedance of the coil 401b of each phase is smaller than when driving at low speed, the electric motor 400 can be driven at high speed.
第4実施形態のその他の構成は、上記第1実施形態と同様である。
Other configurations of the fourth embodiment are the same as those of the first embodiment.
第4実施形態では、上記のように、各相のコイル401bに、低速時にのみ使用される低速用コイル部470と、高速時および低速時の両方に使用される低高速用コイル部460とを設け、低速用コイル部470と低高速用コイル部460とを共通のスロット11内に配置する。これにより、電動機400が回転した際の脈動を抑制することが可能で、かつ、駆動速度に応じて巻線切り替え可能な電動機400を得ることができる。
In the fourth embodiment, as described above, the coil 401b of each phase is provided with the low-speed coil unit 470 used only at low speeds and the low-high speed coil unit 460 used at both high speeds and low speeds. The low speed coil portion 470 and the low speed coil portion 460 are disposed in the common slot 11. As a result, it is possible to obtain an electric motor 400 that can suppress pulsation when the electric motor 400 rotates and that can switch windings according to the driving speed.
(第5実施形態)
次に、図22を参照して、第5実施形態による自動車500の構成について説明する。なお、自動車500は、「車両」の一例である。 (Fifth embodiment)
Next, with reference to FIG. 22, the structure of themotor vehicle 500 by 5th Embodiment is demonstrated. The automobile 500 is an example of a “vehicle”.
次に、図22を参照して、第5実施形態による自動車500の構成について説明する。なお、自動車500は、「車両」の一例である。 (Fifth embodiment)
Next, with reference to FIG. 22, the structure of the
図22に示すように、自動車500は、上記第1~第4実施形態の電動機100、200、300および400のうちのいずれか1つが備えられている。なお、第5実施形態のその他の構成は、上記第1~第4実施形態と同様である。
As shown in FIG. 22, the automobile 500 is provided with any one of the electric motors 100, 200, 300 and 400 of the first to fourth embodiments. The remaining configuration of the fifth embodiment is similar to that of the aforementioned first to fourth embodiments.
なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。
In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.
たとえば、上記第1~第5実施形態では、電動機および電動機用ステータを示したが、電動機以外の発電機などの回転電機および回転電機用ステータであってもよい。
For example, in the first to fifth embodiments, the electric motor and the electric motor stator are shown, but a rotating electric machine such as a generator other than the electric motor and the stator for the electric rotating machine may be used.
また、上記第1~第5実施形態では、平角導線を巻き重ねて積層したエッジワイズコイルを用いた例を示したが、丸線を束ねたコイルを用いてもよい。
In the first to fifth embodiments, an example of using an edgewise coil in which flat conductor wires are wound and laminated is shown. However, a coil in which round wires are bundled may be used.
また、上記第1~第5実施形態では、U相コイル、V相コイルおよびW相コイルを、コイルエンドの一方側において外側に折り曲げるとともに、他方側において内側(または外側)に折り曲げる例を示したが、U相コイル、V相コイルおよびW相コイルを、コイルエンドの両方側において内側に折り曲げてもよい。
In the first to fifth embodiments, the U-phase coil, the V-phase coil, and the W-phase coil are bent outward on one side of the coil end and bent inward (or outward) on the other side. However, the U-phase coil, the V-phase coil, and the W-phase coil may be folded inward on both sides of the coil end.
また、上記第1~第5実施形態では、U相、V相およびW相の各相コイルの連結部を、ステータコアの周方向に沿って延びるように形成した例を示したが、連結部を、周方向に沿って円弧状に延びるように形成してもよいし、周方向に沿って直線状に延びるように形成してもよい。また、連結部を、周方向に沿って円弧状以外の曲線状に延びるように形成してもよい。
In the first to fifth embodiments, the connection portions of the U-phase, V-phase, and W-phase coils are formed so as to extend along the circumferential direction of the stator core. Further, it may be formed so as to extend in an arc shape along the circumferential direction, or may be formed so as to extend linearly along the circumferential direction. Moreover, you may form a connection part so that it may extend in curvilinear form other than circular arc shape along the circumferential direction.
また、上記第1実施形態では、図4に示す形状のコイルをU相コイル(第1コイル)とし、図5に示す形状のコイルをV相コイル(第2コイル)とし、図6に示す形状のコイルをW相コイル(第3コイル)とする例を示したが、図4に示す形状のコイルをV相コイル(W相コイル)とし、図5に示す形状のコイルをW相コイル(U相コイル)とし、図6に示す形状のコイルをU相コイル(V相コイル)としてもよい。すなわち、同じ形状のコイルが同じ相であればよい。また、第2実施形態のコイル(図12、図13、図14)および第3実施形態のコイル(図17、図18、図19)も同様に、同じ形状のコイルが同じ相であればよい。
In the first embodiment, the coil shown in FIG. 4 is a U-phase coil (first coil), the coil shown in FIG. 5 is a V-phase coil (second coil), and the shape shown in FIG. In the example shown in FIG. 4, the coil having the shape shown in FIG. 4 is a V-phase coil (W-phase coil), and the coil having the shape shown in FIG. 5 is a W-phase coil (U). 6 may be used as the U-phase coil (V-phase coil). That is, it is only necessary that coils having the same shape have the same phase. Similarly, the coils of the second embodiment (FIGS. 12, 13, and 14) and the coils of the third embodiment (FIGS. 17, 18, and 19) may have the same shape and the same phase. .
また、上記第5実施形態では、自動車に上記第1~第4実施形態の電動機が備えられている例を示したが、建設機械用等の車両や、農業用の車両に上記第1~第4実施形態の電動機を備えてもよい。また、車両以外にも、たとえば、船舶や航空機等に上記第1~第4実施形態の電動機を備えてもよい。
In the fifth embodiment, the example in which the motor of the first to fourth embodiments is provided in an automobile has been described. However, the first to the second are applied to a vehicle for a construction machine or an agricultural vehicle. You may provide the electric motor of 4 embodiment. In addition to the vehicle, for example, the electric motors of the first to fourth embodiments may be provided in a ship, an aircraft, or the like.
1、101、201、401 ステータ(回転電機用ステータ)
1a ステータコア
1b、101b、201b、401b コイル
2 ロータ
11 スロット
30、130、230 U相コイル(第1コイル)
31、41、51、141、231、241、251 コイル辺部(軸方向部分)
33、42、53、144、233、244、253 連結部(第1連結部)
35、43、54、131、145、146、151 折曲部
36、44、55、132、147、152 連結部(第2連結部)
40、140、240 V相コイル(第2コイル)
50、150、250 W相コイル(第3コイル)
100、200、300、400 電動機(回転電機)
147a 第1部分
147b 第2部分
460 低速用コイル部
470 低高速用コイル部
500 自動車(車両)
f 積層面(第1面)
e 端面(第2面) 1, 101, 201, 401 Stator (stator for rotating electrical machine)
1a Stator core 1b, 101b, 201b, 401b Coil 2 Rotor 11 Slot 30, 130, 230 U-phase coil (first coil)
31, 41, 51, 141, 231, 241, 251 Coil side part (axial part)
33, 42, 53, 144, 233, 244, 253 connecting portion (first connecting portion)
35, 43, 54, 131, 145, 146, 151 Bending part 36, 44, 55, 132, 147, 152 Connecting part (second connecting part)
40, 140, 240 V-phase coil (second coil)
50, 150, 250 W-phase coil (third coil)
100, 200, 300, 400 Electric motor (rotary electric machine)
147a1st part 147b 2nd part 460 Low speed coil part 470 Low speed coil part 500 Automobile (vehicle)
f Laminated surface (first surface)
e End face (second face)
1a ステータコア
1b、101b、201b、401b コイル
2 ロータ
11 スロット
30、130、230 U相コイル(第1コイル)
31、41、51、141、231、241、251 コイル辺部(軸方向部分)
33、42、53、144、233、244、253 連結部(第1連結部)
35、43、54、131、145、146、151 折曲部
36、44、55、132、147、152 連結部(第2連結部)
40、140、240 V相コイル(第2コイル)
50、150、250 W相コイル(第3コイル)
100、200、300、400 電動機(回転電機)
147a 第1部分
147b 第2部分
460 低速用コイル部
470 低高速用コイル部
500 自動車(車両)
f 積層面(第1面)
e 端面(第2面) 1, 101, 201, 401 Stator (stator for rotating electrical machine)
31, 41, 51, 141, 231, 241, 251 Coil side part (axial part)
33, 42, 53, 144, 233, 244, 253 connecting portion (first connecting portion)
35, 43, 54, 131, 145, 146, 151
40, 140, 240 V-phase coil (second coil)
50, 150, 250 W-phase coil (third coil)
100, 200, 300, 400 Electric motor (rotary electric machine)
147a
f Laminated surface (first surface)
e End face (second face)
Claims (20)
- ロータ(2)と、
複数のスロット(11)を有し、前記ロータと対向するように配置されたステータコア(1a)と、前記ステータコアの前記スロットに同心巻で装着された複数のコイル(1b、101b、201b、401b)とを含むステータ(1、101、201、401)とを備え、
前記コイルは、3相交流の各相に対応して設けられた第1コイル(30、130、230)と、第2コイル(40、140、240)と、第3コイル(50、150、250)とを含み、
前記第1コイル、前記第2コイルおよび前記第3コイルは、互いに異なる形状でかつ互いに周長が略同じになるように構成されている、回転電機(100、200、300、400)。 A rotor (2);
A stator core (1a) having a plurality of slots (11) and arranged to face the rotor, and a plurality of coils (1b, 101b, 201b, 401b) concentrically mounted in the slots of the stator core And a stator (1, 101, 201, 401) including
The coil includes a first coil (30, 130, 230), a second coil (40, 140, 240), and a third coil (50, 150, 250) provided corresponding to each phase of the three-phase alternating current. ) And
The rotating electrical machine (100, 200, 300, 400), wherein the first coil, the second coil, and the third coil have different shapes and have substantially the same circumferential length. - 前記第1コイル、前記第2コイルおよび前記第3コイルは、コイルエンドの形状を互いに異ならせることにより、互いに周長が略同じになるように構成されている、請求項1に記載の回転電機。 2. The rotating electrical machine according to claim 1, wherein the first coil, the second coil, and the third coil are configured to have substantially the same circumferential length by making the shapes of coil ends different from each other. .
- 前記第1コイル、前記第2コイルおよび前記第3コイルは、コイルエンドの折曲状態を互いに異ならせることにより形状を互いに異ならせて、互いに周長が略同じになるように構成されている、請求項2に記載の回転電機。 The first coil, the second coil, and the third coil are configured such that the circumferential ends thereof are substantially the same by making the shapes different from each other by making the bent state of the coil ends different from each other. The rotating electrical machine according to claim 2.
- 前記第1コイル、前記第2コイルおよび前記第3コイルは、それぞれ、前記ステータコアの軸方向に延びる一対の軸方向部分(31、41、51、141、231、241、251)と、前記一対の軸方向部分を軸方向の一方側のコイルエンドにおいて連結する第1連結部(33、42、53、144、233、244、253)とを含み、
前記第1コイル、前記第2コイルおよび前記第3コイルのうちの少なくとも2つが、前記ステータコアの軸方向の一方側のコイルエンドにおいて、前記ステータコアの半径方向の外側へ折り曲げられることにより、前記第1コイル、前記第2コイルおよび前記第3コイルのうちの少なくとも2つの前記第1連結部同士が軸方向に沿って重なるように配置されており、
前記第1コイル、前記第2コイルおよび前記第3コイルの前記ステータコアの軸方向の一方側のコイルエンドにおける形状を互いに異ならせることにより、前記第1コイル、前記第2コイルおよび前記第3コイルの周長が互いに略同じになるように構成されている、請求項2または3に記載の回転電機。 Each of the first coil, the second coil, and the third coil includes a pair of axial portions (31, 41, 51, 141, 231, 241, 251) extending in the axial direction of the stator core, and the pair of coils. A first connecting portion (33, 42, 53, 144, 233, 244, 253) for connecting the axial portion at the coil end on one axial side,
At least two of the first coil, the second coil, and the third coil are bent outward in the radial direction of the stator core at a coil end on one side in the axial direction of the stator core. At least two of the first coil, the second coil, and the third coil are arranged so as to overlap in the axial direction;
The first coil, the second coil, and the third coil have different shapes at the coil ends on one side in the axial direction of the stator core, thereby allowing the first coil, the second coil, and the third coil to have different shapes. The rotating electrical machine according to claim 2, wherein the circumferential lengths are configured to be substantially the same. - 前記コイルは、平角導線を巻き重ねて積層した帯状のエッジワイズコイルであり、
前記第1コイル、前記第2コイルおよび前記第3コイルは、少なくとも前記ステータコアの軸方向の他方側のコイルエンドにおいて、前記平角導線の積層方向に沿って前記ステータコアの半径方向に互いに異なる形状になるように折り曲げられている、請求項1に記載の回転電機。 The coil is a band-shaped edgewise coil in which flat conductor wires are wound and laminated,
The first coil, the second coil, and the third coil have shapes that are different from each other in the radial direction of the stator core along the lamination direction of the rectangular conductive wires, at least at the other coil end in the axial direction of the stator core. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is bent as described above. - 前記第1コイル、前記第2コイルおよび前記第3コイルは、前記ステータコアの軸方向の他方側のコイルエンドにおいて、前記ステータコアの半径方向の内側に折り曲げられている、請求項1に記載の回転電機。 2. The rotating electrical machine according to claim 1, wherein the first coil, the second coil, and the third coil are bent inward in the radial direction of the stator core at a coil end on the other axial side of the stator core. .
- 前記第1コイル、前記第2コイルおよび前記第3コイルは、前記ステータコアの軸方向の他方側のコイルエンドにおいて、前記ステータコアの半径方向の内側に折り曲げられ、かつ、前記ステータコアの軸方向に沿って前記ステータコアの軸方向の他方側のコイルエンド側から前記スロットに挿入可能に構成されている、請求項6に記載の回転電機。 The first coil, the second coil, and the third coil are bent inward in the radial direction of the stator core at the other coil end in the axial direction of the stator core, and along the axial direction of the stator core. The rotating electrical machine according to claim 6, wherein the rotating electrical machine is configured to be inserted into the slot from the coil end side on the other axial side of the stator core.
- 前記第1コイル、前記第2コイルおよび前記第3コイルは、前記ステータコアの軸方向の他方側のコイルエンドにおいて、少なくとも前記ステータコアの半径方向の内側に折り曲げられた折曲部(35、43、54、131、145、146、151)の前記ステータコアの半径方向の内側への突出量を互いに異ならせることにより、互いに周長が略同じになるように構成されている、請求項6に記載の回転電機。 The first coil, the second coil, and the third coil are bent portions (35, 43, 54) bent at least radially inward of the stator core at the coil end on the other axial side of the stator core. , 131, 145, 146, 151), the circumferential lengths of the stator cores are made different from each other so that the circumferential lengths thereof are substantially the same. Electric.
- 前記第1コイル、前記第2コイルおよび前記第3コイルは、前記ステータコアの軸方向の他方側のコイルエンドにおいて、前記突出量に加えて、前記第1コイル、前記第2コイルおよび前記第3コイルの前記折曲部の形状を異ならせることにより、互いに周長が略同じになるように構成されている、請求項8に記載の回転電機。 The first coil, the second coil, and the third coil, in addition to the protruding amount, at the coil end on the other axial side of the stator core, the first coil, the second coil, and the third coil. The rotating electrical machine according to claim 8, wherein the peripheral portions have substantially the same circumferential length by making the bent portions have different shapes.
- 前記第1コイル、前記第2コイルおよび前記第3コイルの前記ステータコアの軸方向の他方側のコイルエンドにおける前記折曲部は、略U字形状、略L字形状および略S字形状のうちの少なくとも1つを有する、請求項9に記載の回転電機。 The bent portion at the coil end on the other side in the axial direction of the stator core of the first coil, the second coil, and the third coil is substantially U-shaped, substantially L-shaped, or substantially S-shaped. The rotating electrical machine according to claim 9, comprising at least one.
- 前記第1コイルの折曲部は、略L字形状を有するとともに、前記ステータコアの半径方向の内側への突出量は、最も小さく、
前記第2コイルの折曲部は、略S字形状を有するとともに、前記ステータコアの半径方向の内側への突出量は、最も大きく、
前記第3コイルの折曲部は、略S字形状を有するとともに、前記ステータコアの半径方向の内側への突出量は、前記第1コイルの折曲部よりも大きく、前記第2コイルの折曲部よりも小さい、請求項10に記載の回転電機。 The bent portion of the first coil has a substantially L shape, and the amount of protrusion of the stator core in the radial direction is the smallest,
The bent portion of the second coil has a substantially S shape, and the amount of protrusion of the stator core inward in the radial direction is the largest,
The bent portion of the third coil has a substantially S-shape, and the amount of protrusion of the stator core in the radial direction is larger than the bent portion of the first coil, and the bent portion of the second coil. The rotating electrical machine according to claim 10, which is smaller than a portion. - 前記第1コイル、前記第2コイルおよび前記第3コイルは、それぞれ、前記ステータコアの軸方向に延びる一対の軸方向部分(31、41、51、141)と、前記折曲部を介して前記一対の軸方向部分を軸方向の他方側のコイルエンドにおいて連結する第2連結部(36、44、55、132、147、152)とを含み、
前記第1コイル、前記第2コイルおよび前記第3コイルは、前記第1コイル、前記第2コイルおよび前記第3コイルのそれぞれの第2連結部の前記ステータコアの周方向の長さを互いに異ならせることにより、互いに周長が略同じになるように構成されている、請求項8に記載の回転電機。 Each of the first coil, the second coil, and the third coil includes the pair of axial portions (31, 41, 51, 141) extending in the axial direction of the stator core, and the pair of the first coil, the second coil, and the third coil. A second connecting portion (36, 44, 55, 132, 147, 152) for connecting the axial direction portion of the coil portion at the coil end on the other axial side,
The first coil, the second coil, and the third coil have different lengths in the circumferential direction of the stator core of the second connecting portions of the first coil, the second coil, and the third coil. Accordingly, the rotating electrical machine according to claim 8, wherein the circumferential lengths are substantially the same. - 前記第2連結部は、幅広の第1面(f)と、前記第1面と直交する幅狭の第2面(e)とを有し、前記第1面または前記第2面が前記ステータコアの軸方向に面するように構成されている、請求項12に記載の回転電機。 The second connecting portion has a wide first surface (f) and a narrow second surface (e) orthogonal to the first surface, and the first surface or the second surface is the stator core. The rotating electrical machine according to claim 12, wherein the rotating electrical machine is configured to face the axial direction of the rotating electrical machine.
- 前記第2コイルの第2連結部は、凹状の第1部分(147a)と、凸状の第2部分(147b)とを含み、
前記第2コイルの凸状の第2部分は、前記第1コイルの前記折曲部を跨ぐように配置されている、請求項12に記載の回転電機。 The second coupling portion of the second coil includes a concave first portion (147a) and a convex second portion (147b).
The rotating electrical machine according to claim 12, wherein the convex second portion of the second coil is disposed so as to straddle the bent portion of the first coil. - 前記第1コイル、前記第2コイルおよび前記第3コイルは、前記ステータコアの軸方向の他方側のコイルエンドにおいて、前記ステータコアの半径方向の内側に折り曲げられているとともに、一方側のコイルエンドにおいて、前記ステータコアの軸方向に沿って延びるかまたは前記ステータコアの半径方向の外側に折り曲げられている、請求項6に記載の回転電機。 The first coil, the second coil, and the third coil are bent inward in the radial direction of the stator core at the other coil end in the axial direction of the stator core, and at one coil end, The rotating electrical machine according to claim 6, wherein the rotating electrical machine extends along an axial direction of the stator core or is bent outward in a radial direction of the stator core.
- 前記第1コイル、前記第2コイルおよび前記第3コイルは、前記ステータコアの軸方向の他方側のコイルエンドにおいて、接触せずに互いに交差するように配置されることにより、互いに周長が略同じになるように構成されている、請求項1に記載の回転電機。 The first coil, the second coil, and the third coil are arranged so as to intersect with each other without contacting at the coil end on the other side in the axial direction of the stator core, so that their circumferential lengths are substantially the same. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is configured to be.
- 前記コイルは、低速時にのみ使用される低速用コイル部(460)と、高速時および低速時の両方に使用される低高速用コイル部(470)とを含み、
前記低速用コイル部と前記低高速用コイル部とが共通の前記スロット内に配置されるように構成されている、請求項1に記載の回転電機。 The coil includes a low speed coil portion (460) used only at a low speed and a low speed coil portion (470) used at both a high speed and a low speed,
The rotating electrical machine according to claim 1, wherein the low-speed coil unit and the low-speed coil unit are configured to be disposed in the common slot. - 複数のスロット(11)を有するステータコア(1a)と、
前記ステータコアの前記スロットに同心巻で装着された複数のコイル(1b、101b、201b、401b)とを備え、
前記コイルは、3相交流の各相に対応して設けられた第1コイル(30、130、230)と、第2コイル(40、140、240)と、第3コイル(50、150、250)とを含み、
前記第1コイル、前記第2コイルおよび前記第3コイルは、互いに異なる形状でかつ互いに周長が略同じになるように構成されている、回転電機用ステータ(1、101、201、401)。 A stator core (1a) having a plurality of slots (11);
A plurality of coils (1b, 101b, 201b, 401b) mounted concentrically on the slots of the stator core;
The coil includes a first coil (30, 130, 230), a second coil (40, 140, 240), and a third coil (50, 150, 250) provided corresponding to each phase of the three-phase alternating current. ) And
The stator for a rotating electrical machine (1, 101, 201, 401), wherein the first coil, the second coil, and the third coil have different shapes and have substantially the same peripheral length. - 前記第1コイル、前記第2コイルおよび前記第3コイルは、コイルエンドの形状を互いに異ならせることにより、互いに周長が略同じになるように構成されている、請求項19に記載の回転電機用ステータ。 The rotating electrical machine according to claim 19, wherein the first coil, the second coil, and the third coil are configured to have substantially the same circumference by making the shapes of coil ends different from each other. Stator.
- 回転電機(100、200、300、400)を備える車両(500)であって、
前記回転電機は、
ロータ(2)と、
複数のスロット(11)が設けられ、前記ロータと対向するように配置されたステータコア(1a)と、前記ステータコアの前記スロットに同心巻で装着された複数のコイル(1b、101b、201b、401b)とを有するステータ(1、101、201、401)とを含み、
前記コイルは、3相交流の各相に対応して設けられた第1コイル(30、130、230)と、第2コイル(40、140、240)と、第3コイル(50、150、250)とを含み、
前記第1コイル、前記第2コイルおよび前記第3コイルは、互いに異なる形状でかつ互いに周長が略同じになるように構成されている、車両。 A vehicle (500) comprising a rotating electrical machine (100, 200, 300, 400),
The rotating electric machine is
A rotor (2);
A stator core (1a) provided with a plurality of slots (11) and arranged to face the rotor, and a plurality of coils (1b, 101b, 201b, 401b) concentrically mounted in the slots of the stator core A stator (1, 101, 201, 401) having
The coil includes a first coil (30, 130, 230), a second coil (40, 140, 240), and a third coil (50, 150, 250) provided corresponding to each phase of the three-phase alternating current. ) And
The vehicle, wherein the first coil, the second coil, and the third coil have different shapes and have substantially the same circumferential length.
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JP5910738B2 (en) | 2016-04-27 |
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