Stator assembly, motor and vehicle
By setting the winding groove and the first oil channel on the motor stator core, the problem of poor cooling effect of the motor stator winding is solved, efficient cooling of the interior and ends of the winding is achieved, and production costs are reduced.
Patent Information
- Application Number
- CN202421963048.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The cooling effect of existing motor stator windings is poor, and the water-cooled and oil-cooled heat dissipation methods cannot directly take away the internal heat of the stator windings.
A winding grooves and a first oil passage are provided on the stator core in the axial direction, so that cooling oil can flow directly into the stator core, thereby taking away the heat generated from the inside of the stator winding and the core.
It effectively improves the cooling effect of the stator winding, and can cool the ends and interiors of the winding at the same time, reduces production costs and simplifies structural design.
Smart Images
Figure CN222996385U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle parts, and particularly to a stator assembly, a motor and a vehicle. Background Art
[0002] With the rapid development of the new energy vehicle industry, the continuous performance requirements for motors are getting higher and higher, and the corresponding thermal management difficulty is also getting greater. Therefore, higher requirements are put forward for the heat dissipation method of the motor stator winding.
[0003] At present, there are mainly two heat dissipation methods for the motor stator winding. One is water-cooling, that is, by setting a water channel on the outer surface of the stator core, so that the heat generated by the winding is transferred to the stator core, then to the water channel, and then the heat is carried away by the cooling water in the water channel. However, the heat transfer path of this heat dissipation method is indirect and cannot directly carry away the heat of the stator winding, resulting in poor cooling effect. The other is oil-cooling, that is, by opening oil grooves on the surface of the motor stator core and spraying oil on the end windings to cool the windings. Although this heat dissipation method can directly carry away the heat of the end windings and the surface of the core by using the oil, it cannot directly carry away the heat of the windings inside the stator core, resulting in poor cooling effect of the motor stator winding. Summary of the Utility Model
[0004] The problem solved by the utility model is: how to improve the cooling effect of the motor stator winding.
[0005] To solve the above problems, the utility model provides a stator assembly, a motor and a vehicle.
[0006] In a first aspect, the utility model provides a stator assembly, including a stator core and a stator winding. The stator core is provided with a winding slot and a first oil passage that penetrate axially. The stator winding is arranged in the winding slot, and the first oil passage is located on one side of the winding slot close to the central axis of the stator core.
[0007] Optionally, the stator core is further provided with a second oil passage that penetrates axially, and the second oil passage is located on one side of the winding slot far from the central axis of the stator core.
[0008] Optionally, the winding slot extends radially along the stator core.
[0009] Optionally, there are multiple winding slots, and the multiple winding slots are arranged at intervals along the circumferential direction of the stator core. The first oil passage is arranged corresponding to the winding slot one by one.
[0010] Optionally, the stator assembly further includes a slot wedge, the stator core is provided with a stator slot, the slot wedge is arranged in the stator slot and divides the stator slot into the winding slot and the oil slot, and the slot wall of the oil slot and the slot wedge together form the first oil channel.
[0011] Optionally, the stator slot includes the winding slot, the limiting slot and the oil slot which are sequentially connected along the radial direction of the stator core, the width of the winding slot and the width of the oil slot are respectively smaller than the width of the limiting slot, and the slot wedge is embedded in the limiting slot, wherein the width of the limiting slot is the size of the limiting slot in the circumferential direction of the stator core, the width of the winding slot is the size of the winding slot in the circumferential direction of the stator core, and the width of the oil slot is the size of the oil slot in the circumferential direction of the stator core.
[0012] Optionally, a slot wall of the oil slot on a side away from the winding slot is a closed slot wall.
[0013] Optionally, the stator assembly further includes insulating paper, which is embedded in the winding slots and wrapped around the stator winding.
[0014] In a second aspect, the utility model provides a motor, comprising the stator assembly as described above.
[0015] In a third aspect, the utility model provides a vehicle, comprising the stator assembly as described above, or comprising the motor as described above.
[0016] The beneficial effects of the stator assembly of the utility model are as follows: a winding slot that is axially penetrated can be provided on the stator core to provide an installation position for the stator winding; at the same time, a first oil channel is provided on the stator core and the first oil channel is axially penetrated, so that when the cooling oil enters the motor housing to cool the end winding of the stator winding, the cooling oil can flow into the stator core from the first oil channel to take away the heat generated by the internal winding of the stator winding and the stator core on the inner side of the stator winding, so that the cooling oil entering the motor housing can cool both the end winding of the stator winding and the internal winding of the stator winding, effectively improving the cooling effect of the stator winding. Moreover, by arranging the first oil channel on the side of the winding slot close to the central axis of the stator core, the cooling oil entering the first oil channel can cool the inner side of the stator winding where the heat generation is larger, so as to further improve the cooling effect of the internal winding. In addition, the internal winding of the stator winding is cooled by opening a first oil channel on the stator core. This not only has a simple structure and is easy to manufacture, but also requires little structural change to the original stator core. Therefore, it can be obtained by improving the original stator core, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic cross-sectional structure diagram of the stator assembly in the embodiment of the present utility model;
[0018] Figure 2 It is Figure 1 the partial enlarged view at position A in
[0019] Figure 3 It is a schematic structure diagram of the stator assembly in the embodiment of the present utility model;
[0020] Figure 4 It is a schematic assembly structure diagram of the stator core, slot wedge and insulating paper in the embodiment of the present utility model;
[0021] Figure 5 It is a schematic cross-sectional structure diagram when the stator core and the slot wedge are assembled in the embodiment of the present utility model;
[0022] Figure 6 It is Figure 5 the partial enlarged view at position B in
[0023] Figure 7 It is a schematic structure diagram of the stator slot in the embodiment of the present utility model;
[0024] Figure 8 It is a schematic structure diagram of another situation of the stator slot in the embodiment of the present utility model;
[0025] Figure 9 It is a schematic assembly structure diagram of another situation of the stator core and the slot wedge in the embodiment of the present utility model.
[0026] Explanation of reference numerals:
[0027] 1. Stator core; 11. Winding slot; 12. First oil passage; 13. Second oil passage; 14. Stator slot; 15. Oil groove; 151. Opening; 16. Limit groove; 2. Stator winding; 3. Slot wedge; 4. Insulating paper. Detailed implementation manners
[0028] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings. Although some embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be construed as limited to the embodiments described herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present utility model. It should be understood that the drawings and embodiments of the present utility model are only for exemplary purposes and are not used to limit the protection scope of the present utility model.
[0029] As used herein, the term "comprising" and its variants are open-ended, that is, "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts such as "first" and "second" mentioned in the present utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.
[0030] It should be noted that the modification of "one" and "a plurality of" mentioned in the present utility model is illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".
[0031] In the related art, there are mainly two ways to dissipate heat from the motor stator winding. One is the water-cooled type, that is, by setting a water channel on the outer surface of the stator core, so that the heat generated by the winding is transferred to the stator core, then to the water channel, and then the heat is carried away by the cooling water in the water channel. However, the heat transfer path of this heat dissipation method is indirect and cannot directly carry away the heat of the stator winding, resulting in poor cooling effect; the other is the oil-cooled type, that is, by opening oil grooves on the surface of the motor stator core and spraying oil on the end windings to cool the windings. Although this heat dissipation method can directly carry away the heat of the end windings and the surface of the core by using the oil, it cannot directly carry away the heat of the windings inside the stator core, resulting in poor cooling effect of the motor stator winding.
[0032] In view of the problems existing in the above-mentioned related art, the present utility model provides a stator assembly, a motor and a vehicle.
[0033] Combined with Figure 1 、 Figure 2 and Figure 3 As shown, a stator assembly provided by an embodiment of the present utility model includes a stator core 1 and a stator winding 2. The stator core 1 is provided with a winding slot 11 and a first oil passage 12 that penetrate axially. The stator winding 2 is disposed in the winding slot 11, and the first oil passage 12 is located on one side of the winding slot 11 close to the central axis of the stator core 1.
[0034] Specifically, the stator core 1 is generally in a hollow cylindrical structure, and the hollow part of the cylinder is used for the motor shaft to pass through. The stator core 1 is provided with winding slots 11 for installing the stator winding 2, and the winding slots 11 penetrate along the axial direction of the stator core 1. One end of the winding slot 11 close to the central axis of the stator core 1 is defined as the inner end of the winding slot 11 (which is also the end of the winding slot 11 close to the central axis of the stator core 1), and the end of the winding slot 11 far from the central axis of the stator core 1 is defined as the outer end of the winding slot 11 (which is also the end of the winding slot 11 far from the central axis of the stator core 1). The direction from one end to the other end of the winding slot 11 along the axial direction of the stator core 1 is defined as the first extension direction of the winding slot 11, and the direction from the inner end to the outer end of the winding slot 11 is defined as the second extension direction of the winding slot 11. The second extension direction of the winding slot 11 can be parallel to the radial direction of the stator core 1 (such as Figure 5 shown), or can be set at an acute angle to the radial direction of the stator core 1. At this time, the winding slot 11 is a skewed slot structure. The stator winding 2 is usually an enameled wire winding, and this enameled wire winding can be a flat wire winding. At this time, the stator assembly is usually applied to a flat wire motor. Moreover, the flat wire winding is usually assembled by the method of insertion + welding, that is, the winding is first made into a U-shaped or U-shaped-like shape, and then the U-shaped or U-shaped-like winding is inserted into the winding slot 11 from one end of the winding slot 11, and then the ends of the winding are welded together at the other end of the winding slot 11; the enameled wire winding can also be a round wire winding. At this time, the stator assembly is usually applied to a round wire motor, and the round wire winding is usually installed in the winding slot 11 by the method of winding.
[0035] More specifically, a first oil passage 12 is further provided on the stator core 1, and the first oil passage 12 runs through axially. When the first oil passage 12 is arranged on one side of the winding slot 11 in the circumferential direction, on the one hand, the axial ends of the first oil passage 12 will be blocked by the stator winding 2, affecting the inflow and outflow of the cooling oil to and from the first oil passage 12. On the other hand, it will reduce the insulation distance between the windings in adjacent winding slots 11. Or, in order to ensure the insulation distance, the distance between adjacent winding slots 11 will be increased, resulting in a reduction in the number of winding slots 11, thereby reducing the number of turns of the stator winding 2 and lowering the winding magnetic field strength. Therefore, in this embodiment, the first oil passage 12 is arranged on one side of the winding slot 11 in the radial direction. Moreover, since the heat generated on the inner side of the stator winding 2 (i.e., the side of the stator winding 2 close to the central axis of the stator core 1) is usually greater than that on the outer side, the first oil passage 12 is arranged on the inner side of the winding slot 11, that is, on the side of the winding slot 11 close to the central axis of the stator core 1, so that the cooling oil in the first oil passage 12 can cool the stator winding 2 on the inner side of the stator winding 2. Correspondingly, the side of the winding slot 11 away from the central axis of the stator core 1 is the outer side of the winding slot 11. The first oil passage 12 can be a closed cavity structure independent of the winding slot 11, that is, the inner wall of the first oil passage 12 is a closed ring structure, so that the first oil passage 12 is not connected to the winding slot 11; the first oil passage 12 can also be a semi-surrounding cavity structure connected to the winding slot 11. At this time, a slot wedge 3 described later needs to be provided at the connection between the first oil passage 12 and the winding slot 11, so that the first oil passage 12 and the slot wedge 3 together form a closed cavity structure, which is not specifically limited here. Moreover, the oil inlet end of the first oil passage 12 is usually connected to a sealed oil cover covering one end of the stator winding 2, and the oil outlet end of the first oil passage 12 is usually connected to a sealed oil cover covering the other end of the stator winding 2. When cooling the stator winding 2 with the cooling oil, the cooling oil first enters the sealed oil cover covering one end of the stator winding 2 through the oil inlet hole of the motor housing to cool the end winding of the stator winding 2 (i.e., the part of the stator winding 2 extending outside the winding slot 11). The cooling oil entering this sealed oil cover enters the first oil passage 12 from the oil inlet end of the first oil passage 12 to cool the inner winding of the stator winding 2 (i.e., the part of the stator winding 2 located in the winding slot 11) on the inner side of the stator winding 2 (i.e., the side of the stator winding 2 close to the central axis of the stator core 1), and then flows out from the oil outlet end of the first oil passage 12 through the sealed oil cover covering the other end of the stator winding 2 and the oil outlet hole of the motor housing.
[0036] In the stator assembly of this embodiment, a winding slot 11 axially penetrating through the stator core 1 can be provided to provide an installation position for the stator winding 2. At the same time, a first oil passage 12 is provided on the stator core 1 and the first oil passage 12 axially penetrates through. In this way, when the cooling oil enters the motor housing to cool the end windings of the stator winding 2, the cooling oil can flow into the stator core 1 from the first oil passage 12 to take away the heat generated by the internal windings of the stator winding 2 and the stator core 1, so that the cooling oil entering the motor housing can not only cool the end windings of the stator winding 2, but also cool the internal windings of the stator winding 2, effectively improving the cooling effect of the stator winding 2. Moreover, by arranging the first oil passage 12 on the side of the winding slot 11 close to the central axis of the stator core 1, the cooling oil entering the first oil passage 12 can cool the inner side of the stator winding 2 with a relatively large heat generation amount, so as to further improve the cooling effect on the internal windings. In addition, the method of opening the first oil passage 12 on the stator core 1 to cool the internal windings of the stator winding 2 not only has a simple structure and is easy to process and manufacture, but also has a small modification to the structure of the original stator core 1, so that it can be obtained by improving the original stator core 1, and thus the production cost can be reduced.
[0037] Optionally, as shown in combination with Figure 5 The winding slot 11 extends along the radial direction of the stator core 1.
[0038] In this optional embodiment, the second extension direction of the winding slot 11 is parallel to the radial direction of the stator core 1. At this time, in the radial direction of the stator core 1, the side of the winding slot 11 close to the central axis of the stator core 1 is the radial inner side of the winding slot 11, and the side of the winding slot 11 far from the central axis of the stator core 1 is the radial outer side of the winding slot 11, and the first oil passage 12 is arranged on the radial inner side of the winding slot 11. In this way, by arranging the winding slot 11 to extend along the radial direction of the stator core 1, on the one hand, it is convenient for processing, and on the other hand, compared with the winding slot 11 being inclined relative to the radial direction of the stator core 1, that is, the winding slot 11 is a skewed slot structure, there is no need to consider the installation direction of the skewed slot during assembly, so as to play a certain anti-fooling role and thus improve the assembly efficiency.
[0039] Optionally, as shown in combination with Figure 1 The winding slot 11 is provided with a plurality of them, and the plurality of winding slots 11 are arranged at intervals along the circumferential direction of the stator core 1, and the first oil passage 12 is arranged corresponding to each winding slot 11.
[0040] In this alternative embodiment, the number of winding slots 11 is the same as that of the first oil ducts 12, and they are arranged in a one-to-one correspondence, that is, one first oil duct 12 is provided inside each winding slot 11. In this way, the cooling area of the first oil duct 12 can be increased, ensuring that the stator windings 2 in each winding slot 11 can have their heat carried away by the cooling oil, thereby further improving the cooling effect of the stator windings 2.
[0041] In other embodiments, the first oil ducts 12 can be provided in multiple numbers and the number of the first oil ducts 12 is less than that of the winding slots 11. For example, the width of the first oil duct 12 (i.e., the dimension of the first oil duct 12 in the circumferential direction of the stator core 1) can be set larger so that every two winding slots 11 correspond to one first oil duct 12; alternatively, the first oil duct 12 can be provided as an annular groove structure that is a complete circle. In practical applications, it can be selected and designed according to needs, and no specific limitation is made here.
[0042] Optionally, as shown in Figure 1 and Figure 2 , the stator core 1 is further provided with a second oil duct 13 that penetrates axially, and the second oil duct 13 is located on the side of the winding slot 11 away from the central axis of the stator core 1.
[0043] Specifically, the second oil duct 13 is provided outside the winding slot 11. It can be a closed cavity structure independent of the winding slot 11, that is, the inner wall of the second oil duct 13 is a closed annular structure, so that the second oil duct 13 is not connected to the winding slot 11; the second oil duct 13 can also be a semi-surrounding cavity structure connected to the winding slot 11. In this case, a slot wedge 3 needs to be provided at the connection between the second oil duct 13 and the winding slot 11 so that the second oil duct 13 and the slot wedge 3 together form a closed cavity structure. In practical applications, it can be selected and designed according to needs, and no specific limitation is made here.
[0044] In this alternative embodiment, by providing the second oil duct 13 on the side of the winding slot 11 away from the central axis of the stator core 1, when the cooling oil enters the motor housing to cool the end windings of the stator windings 2, the cooling oil can not only flow into the stator core 1 from the first oil duct 12 to carry away the heat generated by the inner windings of the stator windings 2 and the stator core 1 inside the stator windings 2, but also flow into the stator core 1 from the second oil duct 13 to further carry away the heat generated by the inner windings of the stator windings 2 and the stator core 1 outside the stator windings 2, thereby cooling the stator windings 2 simultaneously on the inner and outer sides of the stator windings 2 and further improving the cooling effect of the stator windings 2.
[0045] Furthermore, as shown in Figure 1 , the second oil ducts 13 and the winding slots 11 are arranged in a one-to-one correspondence.
[0046] In this embodiment, the number of the second oil channels 13 is the same as that of the winding slots 11, and they are arranged in one-to-one correspondence, that is, one second oil channel 13 is provided outside each winding slot 11. In this way, the cooling area of the second oil channels 13 can be increased, and further ensure that the heat of the stator windings 2 in each winding slot 11 can be carried away by the cooling oil, thereby further improving the cooling effect of the stator windings 2.
[0047] In other embodiments, the second oil channels 13 can be set to be multiple, and the number of the second oil channels 13 is less than that of the winding slots 11. For example, the width of the second oil channels 13 (i.e., the dimension of the second oil channels 13 in the circumferential direction of the stator core 1) can be set larger, so that every two winding slots 11 correspond to one second oil channel 13; it can also be that the second oil channels 13 are set as an integral circular groove structure. In practical applications, it can be selected and designed according to needs, and no specific limitation is made here.
[0048] Optionally, as shown in Figure 1 and Figure 2 , the stator assembly further includes a slot wedge 3. The stator core 1 is provided with a stator slot 14. The slot wedge 3 is arranged in the stator slot 14 and divides the stator slot 14 into a winding slot 11 and an oil slot 15. The slot wall of the oil slot 15 and the slot wedge 3 together enclose the first oil channel 12.
[0049] In this optional embodiment, the winding slot 11 and the oil slot 15 are connected in the radial direction to form the stator slot 14, and the slot wedge 3 is arranged at the connection of the winding slot 11 and the oil slot 15 and encloses the first oil channel 12 together with the slot wall of the oil slot 15. In this way, the stator slot 14 can be divided into a winding slot 11 and a first oil channel 12 by arranging the slot wedge 3 in the stator slot 14, so as to reduce the modification of the original structure of the stator core 1, thereby reducing the production difficulty and production cost. Moreover, the setting of the slot wedge 3 can also prevent the stator windings 2 from shifting or vibrating during high-speed rotation, thereby ensuring the stability and reliability of the motor.
[0050] Optionally, as shown in Figure 6 and Figure 7 , the stator slot 14 includes a winding slot 11, a limiting slot 16 and an oil slot 15 that are sequentially connected in the radial direction of the stator core 1. The width of the winding slot 11 and the width of the oil slot 15 are respectively smaller than the width of the limiting slot 16, and the slot wedge 3 is embedded in the limiting slot 16. Among them, the width of the limiting slot 16 is the dimension of the limiting slot 16 in the circumferential direction of the stator core 1, the width of the winding slot 11 is the dimension of the winding slot 11 in the circumferential direction of the stator core 1, and the width of the oil slot 15 is the dimension of the oil slot 15 in the circumferential direction of the stator core 1.
[0051] In this alternative embodiment, the stator slot 14 is formed by sequentially connecting a winding slot 11, a limiting slot 16, and an oil groove 15 along the radial direction of the stator core 1, that is to say, the stator slot 14 extends along the radial direction of the stator core 1. The shape and size of the slot wedge 3 respectively match the shape and size of the limiting slot 16, and moreover, the widths of the winding slot 11 and the oil groove 15 are respectively smaller than the width of the limiting slot 16. This enables there to be partial slot walls both on the radially inner side and the radially outer side of the limiting slot 16 to limit and fix the slot wedge 3 in the radial direction, preventing the slot wedge 3 from moving when installed in the limiting slot 16, so that the slot wedge 3 can better limit the stator winding 2 from shifting or vibrating in the radial direction, further ensuring the stability and reliability of the motor.
[0052] Furthermore, as shown in Figure 7 and Figure 8 , the width of the oil groove 15 is smaller than the width of the winding slot 11. Since an overly large width of the oil groove 15 is likely to affect the magnetic field saturation, the width of the oil groove 15 is generally set to be smaller than the width of the winding slot 11 to cool the inner side of the stator winding 2 without affecting the magnetic field saturation.
[0053] Optionally, as shown in Figure 8 and Figure 9 , an opening 151 is provided on the slot wall on the side of the oil groove 15 away from the winding slot 11, and the opening 151 and the connection between the winding slot 11 and the oil groove 15 are respectively blocked by the slot wedge 3.
[0054] In this alternative embodiment, an opening 151 is provided on the inner slot wall of the oil groove 15, making the stator slot 14 have an open slot structure. Moreover, when the stator slot 14 does not include the limiting slot 16, the oil groove 15 communicates with the winding slot 11. At this time, the slot wedge 3 is respectively embedded at the opening 151 and the connection between the oil groove 15 and the winding slot 11 to form a non-communicating winding slot 11 and a first oil passage 12; when the stator slot 14 includes the limiting slot 16, the oil groove 15 communicates with the limiting slot 16. At this time, the slot wedge 3 is respectively embedded at the limiting slot 16 and the opening 151 to form a non-communicating winding slot 11 and a first oil passage 12. In this way, when the stator winding 2 is a round wire winding, it is convenient to wind the wire at the opening 151, enabling the stator core 1 to be used not only for installing a flat wire winding but also for installing a round wire winding.
[0055] Optionally, as shown in Figure 1 and Figure 2 , the slot wall on the side of the oil groove 15 away from the winding slot 11 is a closed slot wall.
[0056] In this alternative embodiment, an opening 151 is not provided on the groove wall on the side of the oil groove 15 away from the winding groove 11, that is, the inner groove wall of the oil groove 15 is not provided with the opening 151. That is to say, the groove wall on the side of the oil groove 15 away from the winding groove 11 is a closed groove wall, so that the stator groove 14 has a closed groove structure. At this time, the stator core 1 is usually used to install the flat wire winding. Compared with the stator groove 14 having an open groove structure, on the one hand, the sealing performance of the first oil passage 12 can be improved, and on the other hand, the number of slot wedges 3 used can be saved, and the assembly efficiency can be improved.
[0057] Optionally, as shown in Figure 1 and Figure 4 , the stator assembly further includes an insulating paper 4, and the insulating paper 4 is embedded in the winding groove 11 and covers the stator winding 2.
[0058] In this alternative embodiment, the shape of the insulating paper 4 is generally adapted to the shape of the winding groove 11. For example, if the winding groove 11 is a rectangular groove, the insulating paper 4 is a rectangular ring, and if the winding groove 11 is a U-shaped groove, the insulating paper 4 is a U-shaped ring. During assembly, the insulating paper 4 is usually first embedded in the winding groove 11, and then the stator winding 2 is installed in the winding groove 11, so that the insulating paper 4 covers the inner winding of the stator winding 2. In this way, the setting of the insulating paper 4 can not only prevent the stator winding 2 from rubbing or scraping against the groove wall of the winding groove 11 or the edge of the open end of the winding groove 11 when the stator winding 2 is installed in a winding or insertion manner, so as to protect the stator winding 2, but also form an isolation layer between the stator winding 2 and the stator core 1 to improve the insulation strength of the stator winding 2, thereby reducing the discharge phenomenon and prolonging the service life of the motor.
[0059] A motor provided by the present utility model includes the stator assembly as described above.
[0060] In this embodiment, the motor generally further includes a motor housing and sealing oil covers provided at both ends of the stator assembly. The motor housing is usually provided with an oil inlet hole and an oil outlet hole. The axial two ends of the stator winding 2 are respectively covered in these two sealing oil covers. The internal space of one of the sealing oil covers is communicated with the oil inlet hole on the motor housing, the oil inlet end of the first oil passage 12, and the oil inlet end of the second oil passage 13, and the other sealing oil cover is communicated with the oil outlet hole on the motor housing, the oil outlet end of the first oil passage 12, and the oil outlet end of the second oil passage 13. The cooling oil enters one of the sealing oil covers from the oil inlet hole on the motor housing, then enters the first oil passage 12 from the oil inlet end of the first oil passage 12, and finally flows out from the oil outlet end of the first oil passage 12 through the other sealing oil cover and the oil outlet hole of the motor housing; in this process, the cooling oil flowing into the sealing oil cover can cool the end windings of the stator winding 2, and the cooling oil flowing into the first oil passage 12 can cool the inner windings of the stator winding 2. In this way, the cooling effect on the stator winding 2 can be improved.
[0061] A vehicle provided by the present utility model includes the stator assembly as described above, or includes the motor as described above.
[0062] The beneficial effects of the vehicle in this embodiment are the same as those of the above-mentioned stator assembly with respect to the prior art, and will not be elaborated here.
[0063] Although the present utility model is disclosed as above, the protection scope of the present utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model, and these changes and modifications will all fall within the protection scope of the present utility model.
Claims
1. A stator assembly, characterized in that: The invention comprises a stator core (1) and a stator winding (2), wherein the stator core (1) is provided with a winding slot (11) and a first oil passage (12) which are arranged to penetrate the stator core in the axial direction, the stator winding (2) is arranged in the winding slot (11), and the first oil passage (12) is located on one side of the winding slot (11) close to the central axis of the stator core (1).
2. The stator assembly according to claim 1, characterized in that: The stator core (1) is further provided with a second oil passage (13) which is arranged to penetrate along the axial direction, and the second oil passage (13) is located on a side of the winding slot (11) away from the central axis of the stator core (1).
3. The stator assembly according to claim 1, characterized in that: The winding slots (11) are arranged to extend in the radial direction of the stator core (1).
4. The stator assembly according to claim 1, characterized in that: A plurality of winding slots (11) are provided, and the plurality of winding slots (11) are arranged at intervals along the circumference of the stator core (1), and the first oil passages (12) are arranged in one-to-one correspondence with the winding slots (11).
5. The stator assembly according to claim 1, characterized in that: It also includes a slot wedge (3), the stator core (1) is provided with a stator slot (14), the slot wedge (3) is arranged in the stator slot (14), and divides the stator slot (14) into the winding slot (11) and the oil slot (15), and the slot wall of the oil slot (15) and the slot wedge (3) together enclose the first oil channel (12).
6. The stator assembly according to claim 5, characterized in that: The stator slot (14) comprises the winding slot (11), the limiting slot (16) and the oil slot (15) which are sequentially connected along the radial direction of the stator core (1); the width of the winding slot (11) and the width of the oil slot (15) are respectively smaller than the width of the limiting slot (16); and the slot wedge (3) is embedded in the limiting slot (16); wherein the width of the limiting slot (16) is the size of the limiting slot (16) in the circumferential direction of the stator core (1); the width of the winding slot (11) is the size of the winding slot (11) in the circumferential direction of the stator core (1); and the width of the oil slot (15) is the size of the oil slot (15) in the circumferential direction of the stator core (1).
7. The stator assembly according to claim 5, characterized in that: The groove wall of the oil groove (15) on the side away from the winding groove (11) is a closed groove wall.
8. The stator assembly according to claim 1, characterized in that: It also comprises insulating paper (4), wherein the insulating paper (4) is embedded in the winding slot (11) and wrapped around the stator winding (2).
9. A motor, characterized in that: Comprising a stator assembly as described in any one of claims 1-8.
10. A vehicle, characterized in that: It comprises the stator assembly as described in any one of claims 1 to 8, or it comprises the motor as described in claim 9.