WO2015045517A1 - 磁気誘導子型電動機 - Google Patents
磁気誘導子型電動機 Download PDFInfo
- Publication number
- WO2015045517A1 WO2015045517A1 PCT/JP2014/066139 JP2014066139W WO2015045517A1 WO 2015045517 A1 WO2015045517 A1 WO 2015045517A1 JP 2014066139 W JP2014066139 W JP 2014066139W WO 2015045517 A1 WO2015045517 A1 WO 2015045517A1
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- WIPO (PCT)
- Prior art keywords
- core
- stator
- circumferential direction
- core back
- rotor
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
- H02K21/44—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with armature windings wound upon the magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/12—Transversal flux machines
Definitions
- the present invention relates to a magnetic inductor type electric motor applied to an application such as an electric assist turbo driven in a high speed rotation range.
- a permanent magnet type synchronous rotating machine in which a magnet as a field means is mounted on a rotor has been known.
- a motor used in a so-called electric assist turbo in which an electric motor is disposed between a turbine and a compressor of an automobile supercharger, requires high-speed rotation exceeding 100,000 rotations / min.
- the permanent magnet type motor is used, a problem of magnet holding strength occurs.
- magnets as field means are arranged on the stator, two rotor cores having gear-like magnetic saliency are arranged in the axial direction, and shifted by a semipolar pitch in the circumferential direction.
- a conventional magnetic inductor type rotating machine in which a rotor is arranged by arranging (see, for example, Patent Document 1). Since this rotor is comprised only with the iron member of a simple shape, high anti-centrifugal strength is obtained. Therefore, the conventional magnetic inductor type rotating machine is used for applications requiring high-speed rotation such as an electric assist turbo.
- the bearing is desired to have a large diameter from the viewpoint of securing rigidity and securing an oil cooling channel. Therefore, when the bearing is arranged on the inner diameter side of the coil end of the stator coil, a problem of interference between the bearing and the coil end of the stator coil occurs.
- each of the concentrated winding stator coils is composed of a plurality of concentrated winding coils that are produced by winding a conductor wire around one tooth without straddling the slot.
- stator cores In a conventional magnetic inductor type rotating machine, two stator cores are arranged and integrated in the axial direction with a permanent magnet sandwiched between core backs and stored in a housing.
- the permanent magnet is divided into a plurality of magnet blocks in the circumferential direction, but the plurality of magnet blocks are positioned on a single component stator core and fixed with an adhesive or the like. There is no such thing as touching.
- the present invention has been made to solve such a problem, and when the core block pairs sandwiching the magnet blocks are arranged in an annular shape and integrated, the magnet blocks are not in contact with each other.
- An object of the present invention is to obtain a magnetic inductor type electric motor that can suppress the occurrence of cracks and chips.
- a housing made of a non-magnetic material and teeth forming a slot opening on the inner peripheral side protrude radially inward from the inner peripheral surface of the cylindrical core back.
- the first stator core and the second stator core which are arranged at an equiangular pitch in the circumferential direction and are manufactured in the same shape, are separated in the axial direction and the circumferential positions of the teeth are made to coincide with each other.
- a stator core arranged coaxially, and a stator coil wound in concentrated winding around each pair of teeth facing in the axial direction of the stator core, and disposed in the housing
- the stator and the first rotor core and the second rotor core manufactured in the same shape in which the salient poles protrude from the outer peripheral surface of the cylindrical base portion at an equiangular pitch in the circumferential direction.
- stator core and the second stator core A rotor that is positioned on the side and that is offset from each other by a half salient pole pitch in the circumferential direction and coaxially fixed to the rotation shaft, and that is rotatably disposed in the housing, the first stator core, and the second fixed A permanent magnet that is disposed between the first rotor core and the second rotor core so that the salient poles of the first rotor core and the second rotor core have different polarities.
- the first stator core and the second stator core are separated from each other in the axial direction by a core block formed of an arc-shaped core back portion and the teeth protruding radially inward from an inner peripheral surface of the core back portion.
- the core block pairs configured to overlap each other are arranged in an annular shape so that the side surfaces in the circumferential direction of the core back portion are in contact with each other.
- Each of the permanent magnets is divided into a plurality of magnet blocks sandwiched between the core block pair so as to be accommodated in the core block pair, and the magnet block is sandwiched between the core back portions. Both side surfaces have a base portion having an outer shape located on the inner side in the circumferential direction from both circumferential surfaces of the core back portion.
- both side surfaces of the base portion of the magnet block sandwiched between the core back portions are located on the inner side in the circumferential direction from both side surfaces of the core back portion. Therefore, when the first and second stator cores are manufactured by arranging the core block pairs sandwiching the magnet blocks in an annular shape by abutting the side surfaces in the circumferential direction of the core back portion and integrating them, they are adjacent to each other in the circumferential direction. Contact between matching magnet blocks is avoided. Therefore, the occurrence of cracks and chipping in the magnet block is suppressed.
- FIG. 1 It is a partially broken perspective view which shows the main structures of the magnetic inductor type electric motor which concerns on Embodiment 1 of this invention. It is a perspective view which shows the core block pair arranged in the axial direction in the magnetic inductor type
- FIG. 1 is a partially broken perspective view showing a main configuration of a magnetic inductor type electric motor according to Embodiment 1 of the present invention, and FIG. 2 is arranged in the axial direction in the magnetic inductor type electric motor according to Embodiment 1 of the present invention.
- FIG. 3 is a perspective view showing a magnet block in the magnetic inductor type electric motor according to Embodiment 1 of the present invention.
- a magnetic inductor type electric motor 1 includes a rotor 3 that is coaxially fixed to a rotating shaft 2 made of a massive magnetic material such as iron, and a stator that is disposed so as to surround the rotor 3.
- the rotor 3 includes first and second rotor cores 4 and 5 that are manufactured by laminating and integrating a large number of magnetic steel plates formed in a predetermined shape.
- the first and second rotor cores 4 and 5 are formed in the same shape, and have cylindrical base portions 4a and 5a each having a rotation shaft insertion hole drilled at an axial center position, and diameters from the outer peripheral surfaces of the base portions 4a and 5a. It protrudes outward in the direction and extends in the axial direction, and is composed of two salient poles 4b and 5b provided at equiangular pitches in the circumferential direction.
- the first and second rotor cores 4 and 5 are arranged in contact with each other with a half salient pole pitch shifted in the circumferential direction, and are fixed to the rotary shaft 2 inserted through the rotary shaft insertion holes, A rotor 3 is configured.
- the rotor 3 is rotatably disposed in the housing 14 with both ends of the rotating shaft 2 supported by bearings (not shown).
- the stator core 8 includes first and second stator cores 9A and 9B manufactured in the same shape.
- the first and second stator cores 9A and 9B each have a cylindrical core back and six teeth 10b that protrude inward in the radial direction from the inner peripheral surface of the core back and are provided at equiangular pitches in the circumferential direction. And comprising.
- a slot 10c opened to the inner peripheral side is formed by the core back and the adjacent tooth 10b.
- the first and second stator cores 9A and 9B are arranged in the axial direction so that the circumferential positions of the teeth 10b coincide with each other and are spaced apart in the axial direction so as to surround the first and second rotor cores 4 and 5, respectively. Arranged and disposed in the housing 14.
- the first and second stator cores 9A and 9B are each composed of six core blocks 10 divided into six equal parts in the circumferential direction.
- the core block 10 includes an arc-shaped core back portion 10a and teeth 10b protruding radially inward from the circumferential center position of the inner peripheral surface of the core back portion 10a, and is punched into a substantially T shape.
- a large number of magnetic steel plates are laminated and integrated.
- Each of the first and second stator cores 9A and 9B is configured by arranging six core blocks 10 in an annular shape by abutting the side surfaces in the circumferential direction of the core back portion 10a.
- Six core back portions 10a are arranged in an annular shape to constitute the core back of the first and second stator cores 9A and 9B.
- the permanent magnet 12 is configured by arranging six magnet blocks 13 in a ring shape in the circumferential direction.
- the magnet block 13 is formed into a substantially T-shaped lump comprising an arc-shaped base portion 13 a and a shaft portion 13 b that protrudes radially inward from the inner peripheral surface of the base portion 13 a.
- the magnet block 13 has an outer shape that does not protrude from the core block 10 when it is superimposed on the end surface of the core block 10 in a direction orthogonal to the end surface (axial direction), and at least both side surfaces in the circumferential direction of the base portion 13a are core backs. It is formed in an outer shape located on the inner side in the circumferential direction from both side surfaces in the circumferential direction of the portion 10a.
- the magnet block 13 is sandwiched between a pair of core blocks 10 with the base portion 13a positioned between the core back portions 10a and the shaft portion 13b positioned between the teeth 10b.
- the base portion 13a and the shaft portion 13b do not protrude from between the pair of core blocks 10, and both side surfaces in the circumferential direction of the base portion 13a are located on the inner side in the circumferential direction from both side surfaces in the circumferential direction of the core back portion 10a. It arrange
- the concentrated winding coil 11a is wound around a pair of teeth 10b opposite to the pair of core blocks 10 sandwiching the magnet block 13. Then, six pairs of core blocks 10 on which the magnet block 13 is sandwiched and the concentrated winding coil 11a is mounted are arranged in an annular shape with the circumferential side surfaces of the core back portion 10a butting each other. Arranged.
- the stator coil 11 has six concentrated winding coils 11a each formed by winding a conductor wire around a pair of teeth 10b that are opposed to each other in the axial direction without straddling the slot 10c.
- the stator coil 11 is configured, for example, as a three-phase AC winding in which six concentrated winding coils 11a are connected as U-phase, V-phase, W-phase, U-phase, V-phase, and W-phase coils in the circumferential arrangement order. Is done.
- the housing 14 is disposed so as to contact the outer peripheral surface of the core back of the first stator core 9A and the outer peripheral surface of the core back of the second stator core 9B.
- the housing 14 is made of a nonmagnetic material so as not to short-circuit the magnetic path of the permanent magnet 12.
- the magnetic flux of the permanent magnet 12 enters the second stator core 9B, flows in the second stator core 9B in the axial direction and the radially inward direction, and passes from the teeth 10b to the teeth 10b. Enters the salient pole 5b of the second rotor core 5 opposite to.
- the magnetic flux that has entered the second rotor core 5 flows radially inward in the second rotor core 5, and then a part of the magnetic flux flows in the axial direction in the base portion 5 a of the second rotor core 5.
- the remaining portion flows in the axial direction in the rotary shaft 2 and enters the first rotor core 4.
- the magnetic flux entering the first rotor core 4 flows radially outward in the first rotor core 4 and enters the teeth 10b of the first stator core 9A from the salient poles 4b.
- the magnetic flux that has entered the first stator core 9A flows radially outward in the first stator core, then flows axially in the first stator core 9A, and returns to the permanent magnet 12.
- the magnetic inductor type motor 1 operates as a non-commutator motor, and magnetically operates as a permanent magnet type synchronous motor having four poles and six slots.
- the first and second stator cores 9A and 9B are configured so that the substantially T-shaped core block 10 including the arc-shaped core back portion 10a and the teeth 10b is connected to the core back portion 10a.
- the circumferential side surfaces are butted and arranged in an annular shape. Therefore, the core back portions 10a of the adjacent core blocks 10 are in contact with each other, and a magnetic path in the circumferential direction of the magnetic flux generated by the stator coil 11 is secured.
- the magnet block 13 does not protrude from between the pair of core blocks 10, and the side surface of the base portion 13a is formed in an outer shape located on the inner side in the circumferential direction from the side surface of the core back portion 10a.
- the directional side surfaces are brought into contact with each other, contact between adjacent magnet blocks 13 is avoided. Therefore, when the stator 7 is assembled, the occurrence of cracks and chipping of the magnet block 13 due to the contact between the magnet blocks 13 is prevented. As a result, it is possible to avoid the occurrence of a situation in which a magnet piece caused by cracking or chipping of the magnet block 13 enters the gap between the stator 7 and the rotor 3 and the rotor 3 is locked or mechanical loss increases. . In addition, since there is no deterioration of the magnetic characteristics due to the crack or chip of the magnet block 13, the permanent magnet 12 will not be irreversibly demagnetized even if the ambient environmental temperature changes.
- heat due to iron loss and copper loss generated in the stator 7 and the stator coil 11 is transmitted to the housing 14 via the core back portion 10a, and is radiated from the housing 14 to the air or liquid refrigerant. From the viewpoint of improving the cooling performance, it is desirable to increase the contact area between the core back portion 10a and the housing 14.
- a cylindrical portion is formed in the housing 14, and a group of pairs of core blocks 10 arranged in an annular shape is fixed to the cylindrical portion of the housing 14 by press-fitting or shrink fitting. It is desirable to increase the rigidity of the stator 7 by increasing the fastening force.
- the first and second rotor cores are arranged in contact with each other in the axial direction.
- the first and second rotor cores have an axis substantially equal to the axial width of the magnet block.
- a disc-shaped partition wall made of a magnetic material having a width in the direction and having an outer diameter substantially equal to the outer diameter of the salient pole may be disposed between the first and second rotor cores.
- the magnet block 13 is shape
- a magnet block is not limited to a substantially T shape, At least a core back part What is necessary is just to have the base 13a clamped between 10a.
- the base portion 13a may be configured as a single part or may be divided into a plurality of parts.
- the magnet block 13 disposed between the pair of core blocks 10 is formed so as not to protrude in the circumferential direction from between the pair of core blocks 10. If the part 13b is not in contact with the concentrated winding coil 11a wound around the pair of teeth 10b of the pair of core blocks 10, it may protrude from between the teeth 10b in the circumferential direction. Thereby, the volume of the shaft portion 13b, that is, the volume of the magnet block 13 is increased, and the magnetic force of the magnet block 13 can be increased.
- the fixing of the pair of core blocks 10 sandwiching the magnet block 13 is not discussed. For example, the pair of core blocks 10 sandwiching the magnet block 13 is replaced with the teeth 10b of the core block 10.
- the concentrated winding coil 11a wound around the pair may be fixed by a fastening force, or may be fixed by a resin or the like.
- FIG. FIG. 4 is a perspective view showing a state in which three core block pairs are arranged in a magnetic inductor type electric motor according to Embodiment 2 of the present invention
- FIG. 5 is a magnetic inductor type electric motor according to Embodiment 2 of the present invention
- FIG. 6 is a schematic view of adjacent core block pairs viewed from the radially inner side in the magnetic inductor type electric motor according to Embodiment 2 of the present invention. is there.
- the concentrated winding coil is omitted for convenience.
- the side surfaces of the core back portion 10a are butted and the core blocks 10 are arranged in an annular shape, the side surfaces of the core back portion 10a are not in contact with each other but are in partial contact with each other.
- FIG. 4 shows, only the outer peripheral parts of the side surface of the core back part 10a contact
- it has exaggerated and illustrated so that only the outer peripheral side of the side surface of the core back part 10a may contact
- the magnetic flux generated by the stator coil 11 flows radially outward in one tooth 10b, branches and flows to both sides in the circumferential direction at the core back portion 10a,
- the teeth 10b flow radially inward in the teeth 10b on both sides in the circumferential direction, enter the first and second rotor cores 4 and 5, and the first teeth 10b from the first and second rotor cores 4 and 5 Flowing back to Thereby, a flow of magnetic flux flowing in the circumferential direction is generated, a magnetic field in the rotational direction is created, and a rotational driving force is obtained.
- the gap A is formed on the inner diameter side of the contact portion between the side surfaces of the core back portion 10a, and the gap B is formed between the magnet blocks 13 adjacent in the circumferential direction. It is formed between the base parts 13a.
- the circumferential position of the gap A coincides with the circumferential position of the gap B between the base portions 13 a of the magnet block 13. That is, the magnet block 13 does not exist in the axial direction of the contact portion between the side surfaces of the core back portion 10a. Therefore, part of the heat generated at the contact portion between the side surfaces of the core back portion 10 a flows to the housing 14.
- the remaining heat generated at the contact portion between the side surfaces of the core back portion 10a flows in the axial direction in the gaps A and B as indicated by arrows in FIG. Communicated to block 10.
- the heat generated at the contact portion between the side surfaces of the core back portion 10a is transmitted to the magnet block 13 through the air having low heat conductivity, so that the temperature rise of the magnet block 13 is suppressed and the heat is demagnetized. It becomes difficult to realize an electric motor that is resistant to performance deterioration.
- the side surface of the base portion 13a of the magnet block 13 is positioned on the inner side in the circumferential direction from the side surface of the core back portion 10a, but the outer peripheral surface of the base portion 13a is further from the outer peripheral surface of the core back portion 10a. It may be located radially inward.
- the stator 7 when the stator 7 is housed in the housing 14, the stator 7 flows between the pair of core blocks 10 that are separated in the axial direction and radially outward through one side in the circumferential direction of the base portion 13 a of the magnet block 13.
- a ventilation path is formed which flows between the base portion 13a and the housing 14 to the other side in the circumferential direction and flows radially inward on the other circumferential side of the base portion 13a. Therefore, the rotation of the rotor 3 allows the wind generated from the salient poles 4b and 5b to flow through the above-described ventilation path, effectively cools the magnet block 13, and suppresses the temperature rise of the magnet block 13.
- the tooth 10b protrudes radially inward from the circumferential center position of the inner peripheral surface of the core back portion 10a.
- the teeth 10b from the inner peripheral surface of the core back portion 10a. May be displaced in the circumferential direction from the circumferential center position of the core back portion 10a.
- FIG. FIG. 7 is a schematic view of adjacent core block pairs in a magnetic inductor type electric motor according to Embodiment 3 of the present invention as viewed from the inside in the radial direction.
- the core block 20 is divided into two in the axial direction by a first divided core block 21 and a second divided core block 22.
- the first divided core block 21 has an arc-shaped core back portion 21a and teeth (not shown) projecting radially inward from the circumferential center position of the inner peripheral surface of the core back portion 21a.
- the second divided core block 22 includes an arc-shaped core back portion 22a and teeth projecting radially inward from a position displaced from the circumferential center position of the inner peripheral surface of the core back portion 22a to one side in the circumferential direction ( (Not shown).
- the outer shapes of the core back portions 21a and 22b of the first and second divided core blocks 21 and 22 are the same, and the outer shapes of the teeth are the same.
- the core block 20 is manufactured by stacking and integrating the first and second divided core blocks 21 and 22 with teeth.
- the core back portion 22a is displaced to one side in the circumferential direction with respect to the core back portion 21a.
- a pair of core blocks 20 is produced by sandwiching the magnet block 13 between the first divided core blocks 21 and overlapping the core blocks 20 in the axial direction, and concentrated winding coils are wound around a pair of teeth facing in the axial direction. The Then, the side surfaces in the circumferential direction of the core back portion 21a and the side surfaces in the circumferential direction of the core back portion 22a are butted together, and six pairs of core blocks 20 are arranged in an annular shape to constitute a stator. .
- the circumferential position of the gap A ⁇ b> 1 formed on the inner diameter side of the abutting portion between the circumferential side surfaces of the core back portion 21 a is the base portion of the magnet block 13. It coincides with the circumferential position of the gap B between 13a.
- matching part of the circumferential side of the core back part 22a is formed. It is displaced to one side in the circumferential direction with respect to the circumferential position of A1.
- Other configurations are the same as those in the second embodiment.
- the axial position of the gap A1 formed on the inner diameter side of the abutting portion between the circumferential side surfaces of the core back portion 21a is the circumferential position of the gap B between the base portions 13a of the magnet block 13. Therefore, as in the second embodiment, heat generated by iron loss at the abutting portion between the circumferential side surfaces of the core back portion 21a is not easily transmitted to the magnet block 13, and the magnet block 13 is thermally demagnetized. Hard to do.
- the circumferential position of the gap A2 formed on the inner diameter side of the abutting portion between the circumferential side surfaces of the core back portion 22a is the same as the abutting portion between the circumferential side surfaces of the core back portion 21a. It is displaced to one side in the circumferential direction with respect to the circumferential position of the gap A1 formed on the inner diameter side. Therefore, the magnetic flux flowing through the core back portions 21a and 22a flows in the axial direction between the gaps A1 and A2, as indicated by the arrow C in FIG. 7, and therefore the magnetic flux density of the magnetic path flowing through the core back portions 21a and 22a. Becomes smaller and the amount of change in magnetic flux also becomes smaller.
- the iron loss is reduced and the amount of heat generation is reduced, so that the magnet block 13 is more difficult to thermally demagnetize.
- the magnetic resistance of the magnetic path flowing through the core back portions 21a and 22a is reduced and the amount of magnetic flux flowing through the core back portions 21a and 22a is increased, a high output electric motor can be realized.
- the core block is configured by laminating two divided core blocks in the axial direction.
- the number of core blocks divided in the axial direction is not limited to two, and may be three or more. Good.
- the divided core blocks adjacent to each other in the axial direction are manufactured so that the protruding amounts in the circumferential direction from the teeth of the core back portion are different.
- the magnet block is formed in an outer shape that matches the outer shape of the divided block to be sandwiched.
- FIG. FIG. 8 is a perspective view showing a main part of a stator core in a magnetic inductor type electric motor according to Embodiment 4 of the present invention.
- the first and second stator cores 9A ′ and 9B ′ are connected to each other by connecting the outer peripheral portions of the side portions in the circumferential direction of the core back portion 10a with thin portions 10c as easy-to-bend portions.
- the six core blocks 10 'connected are bent at the thin wall portion 10c and formed into an annular shape.
- the fourth embodiment is configured in the same manner as in the first embodiment except that the six core blocks 10 ′ are continuously connected by the thin portion 10c.
- the core block group in which the six core blocks 10 ′ are continuously connected by the thin-walled portion 10 c is composed of, for example, six substantially T-shaped magnetic steel plate pieces from a thin plate of magnetic steel material.
- the thin strips 10c that are formed by stacking and integrating thin strips are punched, and the thin strips 10c are bendable. Therefore, two core block groups deployed in a straight line are stacked with magnet blocks placed between the core back portions 10a, and concentrated winding coils are wound around each pair of teeth 10b, and then bent at the thin portion 10c.
- the pair of core blocks 10 ' is formed into an annular shape to produce first and second stator cores 9A' and 9B 'in which the magnet blocks are sandwiched between the core blocks 10'.
- the first and second stator cores 9A ′ and 9B7 which are bent into an annular shape, are fixed to the cylindrical portion of the housing by press fitting or shrink fitting to obtain a stator held in the housing.
- the thin-walled portion 10c constitutes a contact portion between the side surfaces of the core back portions 10a adjacent to each other at least in the circumferential direction.
- the magnet block is disposed between the pair of core blocks 10 ′ so as not to protrude from between the pair of core blocks 10 ′. Therefore, also in the fourth embodiment, the same effect as in the first embodiment can be obtained.
- the core back portions 10a are connected by the thin portion 10c, and the six core blocks 10 'are continuously formed.
- the bendable portion that connects the core back portions is the same.
- the mechanism is not limited to the thin-walled portion and may be any mechanism that can be easily bent.
- the core block is configured by laminating magnetic steel plate pieces, a fitting hole is formed in the magnetic steel plate piece of one core block, and a shaft portion is formed in the magnetic steel plate piece of the other core block.
- the adjacent core blocks may be pivotably connected around the shaft portion by fitting the portions into the fitting holes. In this case, the fitting portion between the fitting hole and the shaft portion becomes the easily bendable portion.
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Abstract
Description
図1はこの発明の実施の形態1に係る磁気誘導子型電動機の主要構成を示す一部破断斜視図、図2はこの発明の実施の形態1に係る磁気誘導子型電動機における軸方向に配列されたコアブロック対を示す斜視図、図3はこの発明の実施の形態1に係る磁気誘導子型電動機における磁石ブロックを示す斜視図である。
永久磁石12の磁束は、図1に矢印で示されるように、第2固定子コア9B内に入り、第2固定子コア9B内を軸方向および径方向内方に流れ、ティース10bからティース10bに相対する第2回転子コア5の突極5bに入る。そして、第2回転子コア5に入った磁束は、第2回転子コア5内を径方向内方に流れた後、その一部が第2回転子コア5の基部5aを軸方向に流れ、残部が回転軸2内を軸方向に流れて、第1回転子コア4に入る。そして、第1回転子コア4に入った磁束は、第1回転子コア4内を径方向外方に流れ、突極4bから第1固定子コア9Aのティース10bに入る。第1固定子コア9Aに入った磁束は、第1固定子コア内を径方向外方に流れた後、第1固定子コア9A内を軸方向に流れて、永久磁石12に戻る。
また、上記実施の形態1では、磁石ブロック13を挟み込んだコアブロック10の対の固定については論じていないが、例えば、磁石ブロック13を挟み込んだコアブロック10の対を、コアブロック10のティース10bの対に巻回された集中巻コイル11aの締着力で固定してもよいし、樹脂などで固定してもよい。
図4はこの発明の実施の形態2に係る磁気誘導子型電動機において3つのコアブロック対を配列した状態を示す斜視図、図5はこの発明の実施の形態2に係る磁気誘導子型電動機において隣り合うコアブロック対を径方向内方から見た斜視図、図6はこの発明の実施の形態2に係る磁気誘導子型電動機において隣り合うコアブロック対を径方向内方から見た模式図である。なお、図4では、便宜上、集中巻コイルを省略している。
図7はこの発明の実施の形態3に係る磁気誘導子型電動機における隣り合うコアブロック対を径方向内方から見た模式図である。
コアブロック20の対が、磁石ブロック13を第1分割コアブロック21間に挟持させてコアブロック20を軸方向に重ねて作製され、集中巻コイルが軸方向に相対するティースの対に巻装される。そして、コアバック部21aの周方向の側面同士、およびコアバック部22aの周方向の側面同士を突き合わせて、6対のコアブロック20対を円環状に配列して、固定子を構成している。
なお、他の構成は上記実施の形態2と同様に構成されている。
図8はこの発明の実施の形態4に係る磁気誘導子型電動機における固定子コアを示す要部斜視図である。
なお、実施の形態4は、6つのコアブロック10’が薄肉部10cで一続きに連結されている点を除いて、上記実施の形態1と同様に構成されている。
そこで、直線状に展開した2つのコアブロック群を、各コアバック部10a間に磁石ブロックを配して重ね、ティース10bの対のそれぞれに集中巻コイルを巻装した後、薄肉部10cで曲げてコアブロック10’の群の対を円環状に成形して、磁石ブロックがコアブロック10’間に挟み込まれた第1および第2固定子コア9A’,9B’が作製される。そして、円環状に曲げ成形された第1および第2固定子コア9A’,9B7をハウジングの円筒部に圧入、あるいは焼きばめにより固着し、ハウジングに保持された固定子が得られる。この場合、薄肉部10cが少なくとも周方向に隣り合うコアバック部10aの側面同士の接触部を構成する。
Claims (3)
- 非磁性材料で作製されたハウジングと、
内周側に開口するスロットを形成するティースが円筒状のコアバックの内周面から径方向内方に突出して周方向に等角ピッチで配設されてなる、同一形状に作製された第1固定子コアおよび第2固定子コアを、軸方向に離反して、かつ上記ティースの周方向位置を一致させて同軸に配置して構成された固定子コア、および上記固定子コアの軸方向に相対する上記ティースの各対に集中巻きに巻装された固定子コイルを有し、上記ハウジング内に配設された固定子と、
突極が円筒状の基部の外周面に周方向に等角ピッチで突設されてなる同一形状に作製された第1回転子コアおよび第2回転子コアを、それぞれ上記第1固定子コアおよび上記第2固定子コアの内周側に位置させ、かつ互いに周方向に半突極ピッチずらして回転軸に同軸に固着され、上記ハウジング内に回転可能に配設された回転子と、
上記第1固定子コアと上記第2固定子コアとの間に配設され、上記第1回転子コアの突極と上記第2回転子コアの突極とが異なる極性となるように界磁磁束を発生する永久磁石と、を備え、
上記第1固定子コアおよび上記第2固定子コアは、円弧形のコアバック部および上記コアバック部の内周面から径方向内方に突出する上記ティースからなるコアブロックを軸方向に離間させて重ね合わせて構成されたコアブロック対を、上記コアバック部の周方向の側面同士が接するように円環状に配列して構成され、
上記永久磁石は、それぞれ、上記コアブロック対内に収まるように上記コアブロック対間に挟持された複数の磁石ブロックに分割構成され、
上記磁石ブロックは、上記コアバック部間に挟持された、周方向両側面が上記コアバック部の周方向両側面より周方向内側に位置する外形形状の基部を有する磁気誘導子型電動機。 - 上記第1固定子コアおよび上記第2固定子コアは、それぞれ、上記コアバック部を曲げ容易部で連結して上記コアブロックを一続きに連結して構成されている請求項1記載の磁気誘導子型電動機。
- 上記コアブロックは、複数の分割コアブロックを軸方向に重ね合わせて構成され、
軸方向に隣り合う上記分割コアブロックは、上記コアバック部の上記ティースからの周方向の突出量が異なるように構成されている請求項1又は請求項2記載の磁気誘導子型電動機。
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US14/916,197 US20160226355A1 (en) | 2013-09-24 | 2014-06-18 | Magnetic inductor electric motor |
JP2015538955A JP6025998B2 (ja) | 2013-09-24 | 2014-06-18 | 磁気誘導子型電動機 |
DE112014004356.7T DE112014004356B4 (de) | 2013-09-24 | 2014-06-18 | Magnetinduktions-Elektromotor |
CN201480052210.3A CN105580255B (zh) | 2013-09-24 | 2014-06-18 | 磁感应式电动机 |
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JP (1) | JP6025998B2 (ja) |
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EP3116112A3 (de) * | 2015-07-08 | 2017-03-08 | FGB A. Steinbach GmbH & Co. KG | Sekundärteil und primärteil für eine transversalflussmaschine |
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CN107534361B (zh) * | 2015-05-15 | 2019-07-16 | 三菱电机株式会社 | 旋转电机 |
JP6067078B1 (ja) * | 2015-09-09 | 2017-01-25 | アイダエンジニアリング株式会社 | サーボプレス機械、及びそれに用いるモータ、及びモータ組み付け取り外し方法 |
CN107181382B (zh) * | 2017-07-19 | 2023-11-28 | 沈阳工业大学 | 一种转子错角定子隔磁式轴向永磁辅助双凸极电机 |
CN109038991A (zh) * | 2018-09-12 | 2018-12-18 | 北京航空航天大学 | 一种36/4结构高速永磁电机 |
JP7031619B2 (ja) * | 2019-01-23 | 2022-03-08 | トヨタ自動車株式会社 | 回転電機 |
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- 2014-06-18 CN CN201480052210.3A patent/CN105580255B/zh active Active
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CN105580255A (zh) | 2016-05-11 |
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