CN209642410U - Stator and rotating electric machine - Google Patents

Abstract

The stator and rotating electric machine of the utility model can inhibit structure to become complicated and improve cooling efficiency.Stator (14) includes the stator core (21) for being formed with multiple slots (25) and multiple coils (22) of the multiple slots (25) of insert.Stator core (21) has guide portion (41) on the outer peripheral surface (23A) of expanding magnetic yoke portion (23a), and the guide portion (41) guides refrigerant (F) towards the 2nd external coil-end (22b) of slot (25) is located at.Rotating electric machine has the refrigerant supply unit (15) of the rotor of stator (14), configuration on the inside of stator (14) and guide portion (41) supply refrigerant (F) at least towards magnetic yoke portion (23).

Description

Stator and rotating electric machine

Technical field

The utility model relates to a kind of stator (stator) and rotating electric machines.

Background technique

Conventionally, there is known a kind of cooling structure, is to configure from the stator relative to motor in diameter direction peripheral side The squit hole of refrigerant pipe sprays refrigerant towards coil-end (coil end), with to coil and motor carry out it is cooling (such as Referring to patent document 1).

[existing technical literature]

[patent document]

Patent document 1: Japanese Patent Laid-Open 2015-116101 bulletin

Utility model content

[utility model problem to be solved]

However, refrigerant pipe is numerous by bending machining and drawing processing etc. in the cooling structure of the conventional art Trivial processing and be formed as complicated structure, so as to adjust internal refrigerant circulation status (circulating direction, flow velocity etc.) and Ejection state (directional spreding etc. of spray volume) of the refrigerant from squit hole.That is, generating following ask in the conventional art Topic: in order to supply refrigerant to coil-end, it is necessary to have complicated refrigerant pipe, and in order to ensure refrigerant to coil-end Desired ejection state, the requirement for the configuration precision of refrigerant pipe are also stringent.

The utility model is completed in view of the situation, its purpose is to provide a kind of stator and rotating electric machine, Structure can be inhibited to become complicated and improve cooling efficiency.

[technical means to solve problem]

Reach this purpose in order to solve described problem, the utility model uses the following embodiments and the accompanying drawings.

(1) stator (such as stator 14 in embodiment) of an embodiment of the utility model includes: stator core (such as stator core 21 in embodiment) is formed with multiple slots (such as slot 25 in embodiment)；And multiple coils (such as coil 22 in embodiment), inserts the multiple slot, and the stator core is in peripheral part (such as in embodiment Magnetic yoke portion 23) surface (such as outer peripheral surface 23A in embodiment) on have guide portion (such as the guide portion in embodiment 41), refrigerant (such as refrigerant F in embodiment) direction is located at the coil outside the slot by the guide portion Transition part (such as the 1st coil-end 22a and the 2nd coil-end 22b in embodiment) guidance.

(2) in stator described in (1), the guide portion can also be the groove portion being located on the surface of the peripheral part (such as groove portion 42 in embodiment).

(3) in stator described in (2), the groove portion may be alternatively provided at the opposite increase of diameter direction thickness of the peripheral part Wide diameter portion (such as expanding magnetic yoke portion 23a in embodiment).

(4) in stator described in any one of described (1) to (3), the guide portion can also be on the surface of the peripheral part On have multiple refrigerant flow paths (such as the 1st opening portion 43a and the 2nd opening portion in embodiment towards the transition part 43b)。

(5) in stator described in any one of described (1) to (4), the guide portion can also have the storage refrigerant Storage unit (such as storage unit 43 in embodiment).

(6) rotating electric machine of an embodiment of the utility model includes: to determine described in any one of described (1) to (5) Sub (such as stator 14 in embodiment)；Rotor (such as rotor 13 in embodiment) is configured in the inside of the stator； And refrigerant supply part (such as refrigerant supply unit 15 in embodiment), at least peripheral part to the stator core Supply the refrigerant.

[effect of utility model]

According to (1), guide portion can by the refrigerant of movement due to gravity from the peripheral part of stator core accurately It guides to the transition part of coil, cools down stator core and coil well so as to efficiency.

In the case where (2), by being formed with the peripheral part of groove portion, can by refrigerant from stator core guide to The transition part of coil, therefore need not have the component additional to stator core, structure can be inhibited to become complicated and improve cold But efficiency.

In the case where (3), groove portion is formed in the wide diameter portion of stator core, therefore is able to suppress to stator core Inside magnetic circuit interference, the torque for preventing the rotating electric machine for having this stator from being exported (torque) decline.

In the case where (4), multiple positions in the transition part of coil can be cooled down simultaneously, so as to improve system The cooling efficiency of cryogen.

In the case where (5), by having storage unit, refrigeration is accurately-supplied so as to the transition part to coil Agent.

According to (6), refrigerant supply part can be to the stator core efficiency for having guide portion the supply system well Cryogen, so as to improve refrigerant to the cooling performance of the transition part of coil.

Detailed description of the invention

Fig. 1 is the sectional view for schematically showing the structure of rotating electric machine of the embodiments of the present invention.

Fig. 2 is cuing open for a part of structure amplification expression of the stator in the rotating electric machine by the embodiments of the present invention Face figure.

Fig. 3 is the segmentation coil (segment of the stator in the rotating electric machine for indicate the embodiments of the present invention Coil perspective view).

Fig. 4 is the figure of the connection example of multiple segmentation coils in the rotating electric machine for indicate the embodiments of the present invention.

Fig. 5 is the perspective view of the superstructure of the stator in the rotating electric machine for indicate the embodiments of the present invention.

Fig. 6 is the superstructure of the stator in the rotating electric machine for the 1st variation for indicating the embodiments of the present invention Perspective view.

Fig. 7 is the superstructure of the stator in the rotating electric machine for the 2nd variation for indicating the embodiments of the present invention Perspective view.

[explanation of symbol]

10: rotating electric machine

11: shell

12: axis

13: rotor

14: stator

15: refrigerant supply unit (refrigerant supply part)

21: stator core

22: coil

22a: the 1 coil-end (transition part)

22b: the 2 coil-end (transition part)

23: magnetic yoke portion (peripheral part)

23a: expanding magnetic yoke portion (wide diameter portion)

23A: outer peripheral surface (surface)

24: teeth portion

25: slot

26: segmentation coil

27: the 1 milliken conductors

27e: the 2 interconnecting piece

28: the 2 milliken conductors

28e: the 2 interconnecting piece

31: conductive terminal component

32: neutral conductive component

33: connection conductive member

41: guide portion

42: groove portion

43: storage unit

43a: the 1 opening portion (refrigerant flow path)

43b: the 2 opening portion (refrigerant flow path)

F: refrigerant

Specific embodiment

Hereinafter, illustrating an embodiment of the rotating electric machine of the utility model on one side referring to attached drawing on one side.

The rotating electric machine of present embodiment is for example equipped in the vehicles such as electric vehicle.Electric vehicle be electric car, Hybrid power (hybrid) vehicle and fuel-cell vehicle etc..Electric car is driven using battery (battery) as power source It is dynamic.Hybrid vehicle is driven using battery and internal combustion engine as power source.Fuel-cell vehicle be using fuel cell as Power source drives.Rotating electric machine generates rotary driving force by the electric power supplied from battery in driving.Rotating electric machine exists Regenerated electric power is generated by being input to the rotary driving force of rotary shaft when power generation.

Fig. 1 is the sectional view for schematically showing the structure of rotating electric machine 10 of the embodiments of the present invention.

As shown in Figure 1, the rotating electric machine 10 of present embodiment include shell (case) 11, axis (shaft) 12, rotor 13, Stator 14 and refrigerant supply unit 15.For example, rotating electric machine 10 is internal rotor (innerrotor) type, it is the brushless of three-phase alternating current (brush less) direct current (Direct Current, DC) motor.Three-phase is U phase, V phase and W phase.

Shell 11 be pivotably supported axis 12 around the axis of central axis C, and inside contain rotor 13, stator 14 and Refrigerant supply unit 15.

Axis 12 is installed in rotor 13 in the inside of shell 11, and in the external connection of shell 11 in other equipment.

Rotor 13 includes being fixed on the rotor core (rotor core) of axis 12 and being installed on the exciting multiple of rotor core Permanent magnet.

Fig. 2 is that a part of structure amplification of the stator 14 in the rotating electric machine 10 by the embodiments of the present invention indicates Sectional view.Stator 14 includes stator core 21 and multiple coils 22.

As shown in Fig. 2, stator core 21 is, for example, by the multi-disc electromagnetic steel along the axis direction stacking parallel with central axis C Plate is formed.Stator core 21 includes the magnetic yoke portion 23 and portion multiple teeth (teeth) 24 being integrally formed.The shape in magnetic yoke portion 23 It is created as annular shape.Multiple teeth portion 24 are from the position court for separating specified interval in the circumferential direction on the inner peripheral surface in magnetic yoke portion 23 It is protruded inwardly to diameter side.In the circumferential direction between adjacent each two teeth portion 24, it is formed with the slot 25 inserted for coil 22.Slot 25 be so-called open slot (open slot), axially runs through stator core 21, and towards diameter direction inside.

Multiple coils 22 for example including be connected in parallel in each phase of three-phase two coils 22 (such as in U phase the 1st and 2nd coil 22 etc.).Each coil 22 has multiple segmentation coils 26 of series connection.

Fig. 3 is the solid of the segmentation coil 26 of the stator 14 in the rotating electric machine 10 for indicate the embodiments of the present invention Figure.

As shown in figure 3, respectively segmentation coil 26 includes that each two the 1st milliken conductors 27 and the 2nd segmentation being alternately laminated is led Body 28.1st milliken conductor 27 and the respective shape of the 2nd milliken conductor 28 be created as U-shaped substantially identical to each other, with The both ends of U-shaped are towards the curved curved shape in mutually different direction.

1st milliken conductor 27 includes: 1st insertion section 27a and 2nd insertion section 27b, is inserted into mutually different 1st and the 2nd slot In 25；Transition part 27c connects respective 1st end 1st insertion section 27a and 2nd insertion section 27b；And the 1st interconnecting piece 27d and 2nd interconnecting piece 27e extends from respective 2nd end 1st insertion section 27a and 2nd insertion section 27b in mode closer to each other.

2nd milliken conductor 28 includes: 1st insertion section 28a and 2nd insertion section 28b, is inserted into mutually different 1st and the 2nd slot In 25；Transition part 28c connects respective 1st end 1st insertion section 28a and 2nd insertion section 28b；And the 1st interconnecting piece 28d and 2nd interconnecting piece 28e extends in a manner of away from each other from respective 2nd end 1st insertion section 28a and 2nd insertion section 28b.

The 1st insertion section 27a and 2nd insertion section 27b of 1st milliken conductor 27 and the shape of transition part 27c and the 2nd segmentation The 1st insertion section 28a and 2nd insertion section 28b of conductor 28 and the shape of transition part 28c are created as same shape.1st The shape of the 1st interconnecting piece 27d and the 2nd interconnecting piece 27e of milliken conductor 27, with the 1st interconnecting piece 28d of the 2nd milliken conductor 28 and The shape of 2nd interconnecting piece 28e is created as mutually different shape.

The multiple segmentation coils 26 for constituting a coil 22 are to clip by each segmentation coil 26 and in the circumferential direction regulation Several (such as five) slots 25 and configure other segmentation coils 26 connect, to be connected in series.

Fig. 4 is the connection example of multiple segmentation coils 26 in the rotating electric machine 10 for indicate the embodiments of the present invention Figure.

As shown in figure 4, for example, relative to the 1st segmentation coil 26a and in the circumferential direction two sides separate the several slots 25 of regulation And in the case where the 2nd segmentation coil 26b and the 3rd segmentation coil 26c configured, the 1st milliken conductor 27 of the 1st segmentation coil 26a The 1st interconnecting piece 27d be connected to the 2nd segmentation coil 26b the 2nd milliken conductor 28 the 1st interconnecting piece 28d.1st segmentation coil 2nd interconnecting piece 27e of the 1st milliken conductor 27 of 26a is connected to the 2nd connection of the 2nd milliken conductor 28 of the 3rd segmentation coil 26c Portion 28e.1st interconnecting piece 28d of the 2nd milliken conductor 28 of the 1st segmentation coil 26a is connected to the 1st point of the 3rd segmentation coil 26c Cut the 1st interconnecting piece 27d of conductor 27.

2nd interconnecting piece 28e of the 2nd milliken conductor 28 of the 1st segmentation coil 26a is connected to the 1st of the 2nd segmentation coil 26b 2nd interconnecting piece 27e of milliken conductor 27.Two the 1st interconnecting pieces 27d, 28d interconnected are each other and two the 2nd interconnecting pieces 27e, 28e are adjacently configured on diameter direction each other.

As shown in Fig. 2, in each slot 25, such as two 1 different divided in coils 26 divide each the two of coil 26 Each two 2nd insertion section 27b and 2nd insertion section 28b of the segmentation coil 26 of a 1st insertion section 27a and 1st insertion section 28a and the 2nd It is configured in a manner of along the stacking of diameter direction.That is, in each slot 25, four the 1st milliken conductors 27 and four the 2nd milliken conductors 28 It is configured in a manner of being arranged in eight layers along diameter direction.In each slot 25, each two 1st insertion section 27a and 1st insertion section 28a Configuration is configured in the inner circumferential side in diameter direction, each two 2nd insertion section 27b and 2nd insertion section 28b in the peripheral side in diameter direction.

Fig. 5 is the solid of the superstructure of the stator 14 in the rotating electric machine 10 for indicate the embodiments of the present invention Figure.

As shown in figure 5, configuring the transition part outside the slot 25 of the 1st direction side of axis direction in each segmentation coil 26 27c, 28c form the 1st coil-end 22a, configure the 1st interconnecting piece 27d, 28d outside the slot 25 of the 2nd direction side of axis direction and 2nd interconnecting piece 27e, 28e forms the 2nd coil-end 22b.

(such as configuration is in the segmentation the 2nd point of coil 26 of the 1st end of coil 22 for the 1st end in the both ends of each coil 22 Cut the 2nd interconnecting piece 28e etc. of conductor 28) be input/output connecting pin, be connected to the 31 (example of conductive terminal component of each phase Such as conductive terminal component 31U, 31V, 31W of U phase, V phase and W phase).(such as configuration is online for the 2nd end in the both ends of each coil 22 The 2nd interconnecting piece 28e etc. of 2nd milliken conductor 28 of the segmentation coil 26 of the 2nd end of circle 22) it is used for the neutral point in Y wiring Connecting pin, be connected to common neutral conductive component 32 relative to multiple coils 22.

In each coil 22, separatedly configures and should be interconnected in the circumferential direction equipped with not abutted on diameter direction Multiple connecting ends are (for example, 1st segmentation of the configuration in the 2nd end of coil 22 and the different segmentation coils 26 of the 2nd end periphery 2nd interconnecting piece 27e of conductor 27 is each other etc.) in the case where, each connecting end passes through connection conductive member 33 (such as U phase, V phase and W Connection conductive member 33U, 33V, 33W of phase) and link.

Conductive terminal component 31, neutral conductive component 32 and the respective shape example of multiple connection conductive members 33 of each phase Such as it is created as plate.Conductive terminal component 31, neutral conductive component 32 and the multiple connection conductive members 33 of each phase are respective For example, copper sheet etc..Conductive terminal component 31, neutral conductive component 32 and the respective example of multiple connection conductive members 33 of each phase Such as it is configured at the 2nd coil-end 22b on the vertical direction top of stator 14, and so that substantially parallel with the diameter direction side of thickness direction Formula and configure.

The conductive terminal component 31 of each phase, neutral conductive component 32 and it is multiple connection conductive member 33 it is each in, It constitutes and drips or the cooling surface of ejector refrigeration agent F towards the surface of diameter direction peripheral side.

In the magnetic yoke portion 23 of stator core 21, the conductive terminal component 31 of each phase, neutral conductive component 32 and multiple The position for linking the periphery of conductive member 33 is the opposite expanding magnetic yoke portion 23a increased of diameter direction thickness.Expanding magnetic yoke portion 23a Such as be located between a pair of of fastening part 29,29, the pair of fastening part 29,29 be on the top of the vertical direction of stator core 21, By in the circumferential direction at intervals from magnetic yoke portion 23 towards diameter direction on the outside of it is outstanding in a manner of and set.It is passed through for example, being formed with It wears the fastening part 29 of the fastener hole 29a of axis direction and is fastened to shell by fastening members such as the bolts that will be installed on fastener hole 29a 11, so that stator core 21 is fixed on shell 11.For example more a pair of of the fastening part 29,29 the outer peripheral surface 23A of expanding magnetic yoke portion 23a Each peripheral side front end and be configured on the inside of diameter direction.

On the outer peripheral surface 23A of expanding magnetic yoke portion 23a, for example, equipped with by refrigerant F towards the 2nd coil-end 22b guidance Guide portion 41.Guide portion 41 for example has set groove portion 42 on the outer peripheral surface 23A of expanding magnetic yoke portion 23a.

Groove portion 42 is e.g. formed in a manner of extending in the circumferential direction, and relative to neutral conductive component 32 Position on the outside of diameter direction is formed with the opening portion 42a open towards axis direction.As a result, to the outer peripheral surface of expanding magnetic yoke portion 23a The refrigerant F supplied on 23A is wandered after being stranded in groove portion 42 from opening portion 42a towards neutral conductive component 32.

Refrigerant supply unit 15 is, for example, to be set to shell 11, and configure in the top of vertical direction relative to stator 14. Refrigerant supply unit 15 for example has the tubular element 15a axially extended.The inside of tubular element 15a and it is formed in shell 11 refrigerant flow path (illustration omitted) communicates, the refrigeration to be circulated in refrigerant flow path by pump (pump) (illustration omitted) The inside of agent F inflow tubular element 15a.In tubular element 15a, it is formed with the guide portion 41 at least towards magnetic yoke portion 23 Mode and the squit hole (illustration omitted) being open.In turn, in tubular element 15a, be formed with towards the 1st coil-end 22a and The mode of 2nd coil-end 22b and the multiple squit holes (illustration omitted) being open.Flow through refrigerant F inside tubular element 15a from The guide portion 41 in squit hole towards magnetic yoke portion 23 sprays.Refrigerant F is, for example, automatic transmission fluid (Automatic Transrnission Fluid, ATF) etc. lubricating oil.

As described above, stator 14 according to the present embodiment, the groove portion being located on the outer peripheral surface 23A of expanding magnetic yoke portion 23a 42 can accurately guide the refrigerant F of movement due to gravity to the 2nd coil-end 22b from expanding magnetic yoke portion 23a, so as to Efficiency cools down stator core 21 and coil 22 well.

In turn, since groove portion 42 is formed at expanding magnetic yoke portion 23a, it is able to suppress the inside magnetic circuit to magnetic yoke portion 23 Interference, the decline for the torque for preventing rotating electric machine 10 from being exported.

Moreover, need not for example have the component additional to stator core 21, and slot can be formed on expanding magnetic yoke portion 23a Portion 42, therefore it is able to suppress the increase of weight and the increase of structure required cost.In turn, the outer peripheral surface 23A of expanding magnetic yoke portion 23a It is the front end of each peripheral side of more a pair of of fastening part 29,29 and is configured on the inside of diameter direction, therefore the decline of yield can be prevented.

Moreover, rotating electric machine 10 according to the present embodiment, refrigerant supply unit 15 can be to the expansion for being formed with groove portion 42 Diameter magnetic yoke portion 23a efficiency supplies refrigerant F well, so as to improve refrigerant F to the cooling performance of stator 14.

Hereinafter, the variation to embodiment is illustrated.

In the embodiment, groove portion 42 is provided on the outer peripheral surface 23A of expanding magnetic yoke portion 23a, and but not limited to this.

Fig. 6 is the top of the stator 14 in the rotating electric machine 10 for the 1st variation for indicating the embodiments of the present invention The perspective view of structure.

As shown in fig. 6, in the stator core 21 of the 1st variation, the diameter in the magnetic yoke portion 23 between a pair of of fastening part 29,29 The thickness in direction is to be formed as identical with the thickness in the diameter direction at other positions in magnetic yoke portion 23.That is, the magnetic yoke portion of the 1st variation The thickness in 23 diameter direction is formed as identical throughout complete cycle.The groove portion 42 of the 1st variation is formed in a pair of of fastening part as a result, 29, on the outer peripheral surface 23A in the magnetic yoke portion 23 between 29.

Stator core can be prevented compared with the embodiment that expanding magnetic yoke portion 23a is set according to the 1st variation 21 weight increases.

In the embodiment and the 1st variation, guide portion 41 has groove portion 42, and but not limited to this.

Fig. 7 is the top of the stator 14 in the rotating electric machine 10 for the 2nd variation for indicating the embodiments of the present invention The perspective view of structure.

As shown in fig. 7, the guide portion 41 of the 2nd variation other than groove portion 42, can also have the storage of storage refrigerant F Portion 43.Storage unit 43 be, for example, from groove portion 42 towards formed on the inside of diameter direction deep single order recess portion etc..

In turn, guide portion 41 is not limited to single refrigerant flow path (the i.e. embodiment towards neutral conductive component 32 In opening portion 42a), can also have multiple refrigerant flow paths.For example, can also be in the storage unit 43 of guide portion 41, opposite Position on the outside of the diameter direction at multiple and different positions in neutral conductive component 32 is formed with towards the more of axis direction opening A opening portion (the 1st opening portion 43a and the 2nd opening portion 43b etc.).

Whereby, the refrigerant F being supplied on the outer peripheral surface 23A of expanding magnetic yoke portion 23a flows into storage unit 43 from groove portion 42 And after being stranded in storage unit 43, wandered from the 1st opening portion 43a and the 2nd opening portion 43b towards neutral conductive component 32.

It, can be from multiple refrigerant flow paths to multiple and different in neutral point conductive member 32 according to the 2nd variation Position supplies refrigerant F simultaneously, so as to improve cooling efficiency.Moreover, by adjusting multiple opening portions (the 1st opening portion 43a And the 2nd opening portion 43b etc.) size, the flow of each refrigerant flow path can be adjusted, therefore can be according to cooling object position Temperature characterisitic etc., to carry out cooling appropriate.

In addition, guiding to neutral conductive in the embodiment, the 1st variation and the 2nd variation by refrigerant F The guide portion 41 of component 32 is illustrated, and but not limited to this, can also conductive terminal component 31 in each phase and multiple companies Tie conductive member 33 it is each in, in the same manner as neutral conductive component 32 setting guidance refrigerant F guide portion 41.As a result, Can efficiency cool down multiple coils 22 well.

In addition, in the embodiment, stator core 21 can also by by the multiple segmentation iron cores arranged in the circumferential direction according to Sequence links and is formed.

In addition, coil 22 has multiple segmentation coils 26, and but not limited to this in the embodiment.Coil 22 It can be the winding of other forms.

In addition, slot 25 can also be the so-called closed slot that the end on the inside of diameter direction be closed in the embodiment (closed slot)。

In addition, rotating electric machine 10 is mounted in vehicle, and but not limited to this in the embodiment, can also be equipped on Other equipment.

The embodiments of the present invention is only illustration person, it is not intended to limit the range of utility model.These embodiment party Formula can be implemented in such a way that others are various, in the range of not departing from the purport of utility model, be able to carry out various omissions, set It changes, change.These embodiments or its deformation are included in the range or purport of utility model, similarly, are wanted included in right In the range of utility model documented by asking and its equalization.

Claims (6)

1. a kind of stator characterized by comprising

Stator core is formed with multiple slots；And

Multiple coils insert multiple slots,

The stator core has guide portion on the surface of peripheral part, and refrigerant direction is located at the slot by the guide portion The transition part guidance of the external coil.

2. stator according to claim 1, which is characterized in that

The guide portion is the groove portion being located on the surface of the peripheral part.

3. stator according to claim 2, which is characterized in that

The groove portion is the opposite wide diameter portion increased of diameter direction thickness for being located at the peripheral part.

4. stator according to any one of claim 1 to 3, which is characterized in that

The guide portion has multiple refrigerant flow paths towards the transition part on the surface of the peripheral part.

5. stator according to any one of claim 1 to 3, which is characterized in that

The guide portion has the storage unit for storing the refrigerant.

6. a kind of rotating electric machine characterized by comprising

Stator described in any one of claims 1 to 5；

Rotor is configured in the inside of the stator；And

Refrigerant supply part supplies the refrigerant at least towards the peripheral part of the stator core.