Stator assembly, electric machine and vehicle

Abstract

This utility model discloses a stator assembly, a motor, and a vehicle. The stator assembly includes a housing assembly, a stator core, stator windings, and a slot wedge assembly. The stator core has multiple stator slots spaced circumferentially, each slot having an opening that extends radially inward from the stator core. At least a portion of the stator windings is embedded within the stator slots. The slot wedge assembly closes the openings of the multiple stator slots. Each stator slot has an in-slot flow channel extending axially from the stator core between the slot wall and the stator winding embedded within the slot. One end of the housing assembly has a medium inlet communicating with the inlets of the multiple in-slot flow channels, and the other end of the housing assembly has a medium outlet communicating with the outlets of the multiple in-slot flow channels. According to this utility model's stator assembly, the cooling medium flowing through the in-slot flow channels can directly cool the windings, improving heat dissipation efficiency, effectively reducing winding temperature rise, and alleviating problems such as insulation aging, performance degradation, and even burnout caused by overheating.

Description

Technical Field

[0001] This utility model relates to the field of electric motors, and in particular to a stator assembly, an electric motor, and a vehicle. Background Technology

[0002] In related technologies, drive motors commonly employ water cooling for heat dissipation. However, water cooling methods are mostly limited to directly cooling the motor housing. For the windings, the part of the motor that generates the most heat, water cooling systems struggle to provide direct and effective cooling. This is particularly pronounced in permanent magnet motors, where thermal failure is a significant problem, primarily manifesting as insulation failure caused by overheating of the windings. Insulation failure not only severely impacts the normal operation of the motor and reduces its efficiency but can even lead to complete motor damage, posing a serious threat to the safety and reliability of the entire vehicle. Utility Model Content

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a stator assembly. According to the stator assembly of this invention, the cooling medium can directly cool the windings by flowing through the channels in the slots, improving heat dissipation efficiency, effectively reducing the temperature rise of the windings, and alleviating problems such as insulation aging, performance degradation, and even burnout caused by overheating.

[0004] This utility model also proposes a motor having the above-mentioned stator assembly.

[0005] This utility model also proposes a vehicle having the above-mentioned motor.

[0006] The stator assembly according to this utility model includes: a housing assembly; a stator core housed within the housing assembly, the stator core having a plurality of stator slots spaced apart circumferentially, each stator slot having an opening that opens radially inward along the inner side of the stator core; a stator winding, at least a portion of which is embedded in the stator slot; and a slot wedge assembly disposed radially inward of the stator core and closing the openings of the plurality of stator slots; wherein, an in-slot flow channel extending axially along the stator core is formed between the slot wall of each stator slot and the stator winding embedded in the stator slot, one end of the housing assembly having a medium inlet communicating with the inlet of the plurality of in-slot flow channels, and the other end of the housing assembly having a medium outlet communicating with the outlet of the plurality of in-slot flow channels.

[0007] According to the stator assembly of this utility model, a gap is formed between the slot wall of each stator slot and the stator winding embedded in the stator slot on the stator core, forming an axially extending in-slot flow channel. The in-slot flow channel provides a path for the cooling medium to flow, allowing the cooling medium to directly contact the stator winding. Since the stator winding is the heat-generating component during motor operation, the cooling medium can fully exchange heat with the stator winding when flowing in the in-slot flow channel, absorbing the heat generated by the stator winding, thereby achieving the purpose of cooling the winding. One end of the housing assembly is provided with a medium inlet communicating with the inlets of multiple in-slot flow channels. The cooling medium entering from the medium inlet can be distributed to the inlets of each in-slot flow channel. When it is necessary to cool the stator winding, the cooling medium (such as cooling oil) is injected from the medium inlet, and the cooling medium begins to enter each in-slot flow channel and exchange heat with the stator winding. The other end of the housing assembly is provided with a medium outlet communicating with the outlets of multiple in-slot flow channels. After heat exchange, the cooling medium flows out from the outlets of the various channels within the tanks and collects at the medium outlet. After absorbing heat from the stator windings in the channels, the cooling medium's temperature rises, and it is discharged from the medium outlet, carrying away the heat.

[0008] According to some embodiments of the present invention, a flow guide extending circumferentially along the stator core is defined between the housing assembly and at least one end of the stator core, and at least another portion of the stator winding is housed within the flow guide; wherein the flow guide is respectively connected to the medium inlet and the inlet of a plurality of slot channels, or the flow guide is respectively connected to the medium outlet and the outlet of a plurality of slot channels.

[0009] According to some embodiments of the present invention, the housing assembly includes: a first housing, at least a portion of which is disposed around the outer periphery of the stator core; and a second housing disposed at at least one axial end of the stator core, the second housing being connected to the first housing, and the flow channel being defined between the second housing and at least one end of the stator core.

[0010] According to some embodiments of the present invention, the second housing includes: a radially extending section, the radially extending section being configured as an annulus surrounding the central axis of the stator core, one end of the radially extending section being connected to the first housing, and the other end of the radially extending section extending radially inward along the stator core; and an axially extending section, the axially extending section being configured as an annulus surrounding the central axis of the stator core, one end of the axially extending section being connected to the radially inner edge of the radially extending section, and the other end of the axially extending section extending axially toward the end face of the stator core, wherein the flow guide channel is defined between the axially extending section, the radially extending section, and the end face of the stator core.

[0011] According to some embodiments of the present invention, an outer peripheral flow channel suitable for the flow of cooling medium is formed between the outer peripheral wall of the stator core and the inner peripheral wall of the first housing, and at least one end of the outer peripheral flow channel is connected to the guide flow channel.

[0012] According to some embodiments of the present invention, the outer peripheral wall of the stator core is formed with a flow channel groove that extends axially and is open at both ends, and the outer peripheral flow channel is formed between the groove wall of the flow channel groove and the inner peripheral wall of the first housing.

[0013] According to some embodiments of the present invention, the flow channel groove is configured as a plurality of grooves spaced apart circumferentially along the stator core.

[0014] According to some embodiments of the present invention, the stator core is formed with a plurality of stator teeth spaced apart in the circumferential direction, and a stator slot is defined between two adjacent stator teeth. The end of each stator tooth is formed with a toothed shoe portion extending in the circumferential direction of the stator core, and an opening of the stator slot is formed between two adjacent toothed shoes. The slot wedge assembly includes a plurality of slot wedges arranged in the circumferential direction of the stator core. The end of each slot wedge is formed with an engaging portion extending in the circumferential direction of the stator core. The engaging portion is embedded in the stator slot and abuts against the toothed shoe portion in the radial direction of the stator core.

[0015] The motor according to this utility model is briefly described below.

[0016] The motor according to this utility model includes the stator assembly described in any of the above embodiments. Since the motor according to this utility model includes the stator assembly described in any of the above embodiments, the cooling medium can directly act on the stator windings, effectively improving heat dissipation efficiency, reducing winding temperature rise, and significantly mitigating the risks of insulation aging, performance degradation, and burnout caused by overheating.

[0017] The vehicle according to this utility model is briefly described below.

[0018] The vehicle according to this utility model includes the motor described in any of the above embodiments. Because the vehicle according to this utility model includes the motor described in any of the above embodiments, the vehicle's power system operates more stably, significantly reducing the risk of failures caused by overheating, and its overall performance and durability are significantly improved.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a cross-sectional structural schematic diagram of a stator assembly according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram of a stator assembly according to an embodiment of the present invention;

[0023] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 4 This is a schematic diagram of the stator core of a stator assembly according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic cross-sectional view of the first housing and stator core of a stator assembly according to an embodiment of the present invention.

[0026] Figure label:

[0027] 1. Stator assembly;

[0028] 10. Housing assembly; 101. First housing; 1011. Medium inlet; 1012. Medium outlet; 102. Second housing; 1021. Radial extension section; 1022. Axial extension section;

[0029] 11. Stator core; 111. Stator slot; 112. Stator tooth; 1121. Tooth shoe; 113. Flow channel groove.

[0030] 12. Stator windings;

[0031] 13. Slotted wedge assembly; 131. Slotted wedge component; 1311. Fitting part;

[0032] 14. Inner channel; 15. Guide channel; 16. Outer channel. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In related technologies, drive motors commonly employ water cooling for heat dissipation. However, water cooling methods are mostly limited to directly cooling the motor housing. For the windings, the part of the motor that generates the most heat, water cooling systems struggle to provide direct and effective cooling. This is particularly pronounced in permanent magnet motors, where thermal failure is a significant problem, primarily manifesting as insulation failure caused by overheating of the windings. Insulation failure not only severely impacts the normal operation of the motor and reduces its efficiency but can even lead to complete motor damage, posing a serious threat to the safety and reliability of the entire vehicle.

[0037] The following is for reference. Figures 1-5 The stator assembly 1 according to an embodiment of the present utility model is described.

[0038] like Figures 1-5As shown, the stator assembly 1 according to this utility model includes a housing assembly 10, a stator core 11, a stator winding 12, and a slot wedge assembly 13. The stator core 11 is housed within the housing assembly 10. The housing assembly 10 is the outer shell structure of the stator assembly 1, used to support and protect the internal components (stator core 11, stator winding 12, etc.). The stator core 11 carries the stator winding 12 and generates an electromagnetic field. The stator core 11 has multiple stator slots 111 spaced apart circumferentially, and each stator slot 111 has an opening that opens radially inward from the stator core 11. At least a portion of the stator winding 12 is embedded in the stator slot 111. When energized, the stator winding 12 generates a magnetic field that interacts with the rotor magnetic field. The slot wedge assembly 13 is disposed radially inward from the stator core 11 and closes the openings of the multiple stator slots 111, preventing the stator winding 12 from loosening and facilitating the flow of cooling medium.

[0039] Each stator slot 111 has an in-slot flow channel 14 extending axially along the stator core 11 between its slot wall and the stator winding 12 embedded within it. A gap is formed between the slot wall of each stator slot 111 and the stator winding 12 embedded within it, creating the axially extending in-slot flow channel 14. The in-slot flow channel 14 provides a path for the cooling medium to flow, allowing it to directly contact the stator winding 12. Since the stator winding 12 is the heat-generating component during motor operation, the cooling medium flowing in the in-slot flow channel 14 can fully exchange heat with the stator winding 12, absorbing the heat generated by the stator winding 12, thereby achieving the purpose of cooling the winding.

[0040] One end of the housing assembly 10 is provided with a medium inlet 1011 that communicates with the inlets of multiple slot flow channels 14. The cooling medium entering from the medium inlet 1011 can be distributed to the inlets of each slot flow channel 14. When it is necessary to cool the stator winding 12, the cooling medium (such as cooling oil) is injected from the medium inlet 1011, and the cooling medium begins to enter each slot flow channel 14 and exchange heat with the stator winding 12.

[0041] The other end of the housing assembly 10 is provided with a medium outlet 1012 that communicates with the outlets of the multiple in-slot flow channels 14. After heat exchange, the cooling medium flows out from the outlets of each in-slot flow channel 14 and collects at the medium outlet 1012. After absorbing heat from the stator winding 12 in the in-slot flow channels 14, the cooling medium's temperature rises and it is discharged from the medium outlet 1012, carrying away the heat.

[0042] Therefore, according to the stator assembly 1 of this utility model, the cooling medium can directly cool the winding by flowing through the channel 14 in the slot, thereby improving heat dissipation efficiency, effectively reducing the temperature rise of the winding, and alleviating problems such as insulation aging, performance degradation, or even burnout caused by overheating.

[0043] It should be noted that the cooling medium can flow into the channel 14 in the slot through the medium inlet 1011 located below the stator core 11. Due to gravity, the cooling medium can fill the channel 14 on its own. During the flow of the cooling medium in the channel 14, it comes into direct contact with the stator winding 12, thereby generating convective heat transfer. This achieves a highly efficient and direct cooling effect on the stator winding 12 of the motor, ultimately increasing the rated power of the motor.

[0044] According to some embodiments of this utility model, such as Figure 1 As shown, a flow channel 15 extending circumferentially along the stator core 11 is defined between the housing assembly 10 and at least one end of the stator core 11, and at least another portion of the stator winding 12 is housed within the flow channel 15. The flow channel 15 can distribute or collect the cooling medium, optimize the flow path of the cooling medium, and improve cooling efficiency. The circumferential extension of the flow channel 15 allows the cooling medium to uniformly cover the end of the stator core 11. The portion of the stator winding 12 extending out of the stator slot 111 is located within the flow channel 15, allowing the cooling medium to simultaneously cool the stator winding 12.

[0045] According to some embodiments of this utility model, the flow guide channel 15 is connected to the medium inlet 1011 and the inlets of multiple in-slot flow channels 14. After the cooling medium is injected, it first enters the flow guide channel 15 and is evenly distributed in the circumferential direction. Then, it is distributed to the inlets of each in-slot flow channel 14 through the flow guide channel 15 to ensure that the cooling medium flow rate of each stator slot 111 is balanced.

[0046] According to some embodiments of this utility model, the guide channel 15 is connected to the medium outlet 1012 and the outlets of multiple in-tank channels 14. The cooling medium after heat exchange flowing out from each in-tank channel 14 first collects in the guide channel 15, and then is discharged uniformly through the medium outlet 1012, thereby improving cooling efficiency.

[0047] According to some embodiments of this utility model, such as Figure 1 As shown, the housing assembly 10 includes a first housing 101 and a second housing 102. At least a portion of the first housing 101 is disposed around the outer periphery of the stator core 11. The second housing 102 is disposed at at least one axial end of the stator core 11 and is connected to the first housing 101. A flow channel 15 is defined between the second housing 102 and at least one end of the stator core 11.

[0048] The first housing 101 primarily encloses and protects the stator core 11, while also providing a stable installation environment to ensure the positional stability of the stator core 11 during motor operation, reducing structural deviations caused by vibration and other factors, and ensuring the overall smooth operation of the motor. After the first housing 101 and the stator core 11 are assembled, the second housing 102, as an end cover, is sealed to the first housing 101, forming a complete outer shell structure, which is convenient for assembly. A circumferentially extending guide channel 15 is formed between the second housing 102 and the end face of the stator core 11, which can achieve uniform distribution or efficient collection of the cooling medium. When the guide channel 15 is located on the medium inlet 1011 side, the cooling medium enters the guide channel 15 from the external pipeline and diffuses in a circumferential direction, ensuring balanced inlet pressure in each channel 14. When the guide channel 15 is located on the medium outlet 1012 side, the cooling medium flowing out from each channel 14 is mixed in the guide channel 15 and then discharged in a concentrated manner.

[0049] According to some embodiments of this utility model, such as Figure 1 As shown, the second housing 102 includes a radially extending section 1021 and an axially extending section 1022. The radially extending section 1021 is configured as an annular ring surrounding the central axis of the stator core 11, such that the radially extending section 1021 forms a circular shape with the central axis of the stator core 11 as the center, and is evenly distributed around the stator core 11. One end of the radially extending section 1021 is connected to the first housing 101, so that the second housing 102 and the first housing 101 form an integral structure. The other end of the radially extending section 1021 extends radially inward along the stator core 11, that is, towards the center of the stator core 11, laying the foundation for the subsequent connection of the axially extending section 1022 and the formation of the flow channel 15.

[0050] The axial extension segment 1022 is constructed as a ring surrounding the central axis of the stator core 11. Similar to the radial extension segment 1021, the axial extension segment 1022 forms a ring shape centered on the central axis of the stator core 11, but its extension direction differs from that of the radial extension segment 1021. One end of the axial extension segment 1022 is connected to the radial inner edge of the radial extension segment 1021; that is, the axial extension segment 1022 begins at the inwardly extending end of the radial extension segment 1021 and continues to extend along a specific direction. The other end of the axial extension segment 1022 extends along the axial direction of the stator core 11 towards the end face of the stator core 11, i.e., along the central axis direction of the stator core 11, approaching the end face of the stator core 11.

[0051] Because there is a specific spatial relationship between the end faces of the axial extension section 1022, the radial extension section 1021 and the stator core 11, a flow channel 15 is defined between the end faces of the axial extension section 1022, the radial extension section 1021 and the stator core 11, so that the cooling medium can uniformly cover the end of the stator core 11, thereby effectively cooling the part of the stator winding 12 that extends out of the stator slot 111.

[0052] According to some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, an outer peripheral flow channel 16 is formed between the outer peripheral wall of the stator core 11 and the inner peripheral wall of the first housing 101, suitable for the flow of cooling medium. A spatial gap exists between the outer peripheral wall of the stator core 11 and the inner peripheral wall of the first housing 101, thus forming the outer peripheral flow channel 16. The outer peripheral flow channel 16 provides a flow path for the cooling medium. During motor operation, the stator core 11 generates heat due to electromagnetic induction and current flow. When the cooling medium flows in the outer peripheral flow channel 16, it directly contacts the outer peripheral wall of the stator core 11, thereby absorbing the heat generated by the stator core 11 and cooling it. By setting the outer peripheral flow channel 16, the contact area between the cooling medium and the stator core 11 is increased, allowing the cooling medium to more fully absorb the heat from the stator core 11 and improving cooling efficiency.

[0053] At least one end of the outer peripheral flow channel 16 is connected to the guide flow channel 15. When the cooling medium enters the housing assembly 10 from the medium inlet 1011, it first enters the guide flow channel 15, and then a portion of the cooling medium flows into the outer peripheral flow channel 16 through the end connected to it. After cooling the outer periphery of the stator core 11, the cooling medium flows from the other end of the outer peripheral flow channel 16 to another guide flow channel 15, and finally exits from the medium outlet 1012. By connecting the outer peripheral flow channel 16 and the guide flow channel 15, the flow path of the cooling medium is optimized, ensuring that the cooling medium flows along a predetermined route, thus achieving effective cooling of the stator core 11.

[0054] According to some embodiments of this utility model, such as Figure 4 As shown, the outer peripheral wall of the stator core 11 has a flow channel groove 113 that extends axially and is open at both ends. The flow channel groove 113 is arranged along the central axis of the stator core 11, and both ends of the flow channel groove 113 are open, that is, the flow channel groove 113 has no closed structure at both ends of the axial direction of the stator core 11, so that the cooling medium can flow smoothly from one end of the flow channel groove 113 and flow out from the other end.

[0055] An outer peripheral flow channel 16 is formed between the channel wall of the flow channel 113 and the inner peripheral wall of the first housing 101. When the stator core 11 is installed into the first housing 101, the outer peripheral flow channel 16 is formed due to the spatial gap between the flow channel 113 on the outer peripheral wall of the stator core 11 and the inner peripheral wall of the first housing 101. In other words, the channel wall of the flow channel 113 on the outer peripheral wall of the stator core 11 and the inner peripheral wall of the first housing 101 cooperate with each other to form the outer peripheral flow channel 16.

[0056] By forming an outer peripheral flow channel 16 by providing flow channel grooves 113 on the outer peripheral wall of the stator core 11, the space between the stator core 11 and the first housing 101 can be fully utilized. This effectively guides the flow of the cooling medium and improves cooling efficiency without adding excessive complexity to the structure.

[0057] According to some embodiments of this utility model, such as Figure 4 As shown, the flow channels 113 are configured as multiple channels spaced apart circumferentially along the stator core 11. These multiple flow channels 113 are distributed on the outer peripheral wall of the stator core 11 and arranged at certain intervals along the circumference of the stator core 11. Due to the presence of multiple flow channels 113, the contact area between the cooling medium and the outer peripheral wall of the stator core 11 is relatively increased. More cooling medium can simultaneously exchange heat with the stator core 11, more effectively absorbing the heat generated by the stator core 11, thereby enhancing the cooling effect. By arranging the multiple flow channels 113 circumferentially, the cooling medium can be more evenly distributed on the outer periphery of the stator core 11. When the cooling medium flows in these flow channels 113, it can cool the stator core 11 from different positions, thereby improving the overall uniformity of cooling of the stator core 11.

[0058] According to some embodiments of this utility model, such as Figure 3 As shown, the stator core 11 has multiple stator teeth 112 spaced apart circumferentially. These teeth 112 support the stator windings 12 and play a crucial role in the formation and distribution of the electromagnetic field within the motor. A stator slot 111 is defined between two adjacent stator teeth 112, providing space for the stator windings 12 to be installed and fixed. The stator windings 12 are embedded within the stator slots 111 and generate a magnetic field when energized.

[0059] Each stator tooth 112 has a toothed shoe 1121 extending circumferentially from the end of the stator core 11, and an opening for a stator slot 111 is formed between two adjacent toothed shoe portions 1121. The opening is a channel for the stator winding 12 to be inserted into the stator slot 111, and also a location for subsequent installation of the slot wedge assembly 13. The slot wedge assembly 13 includes a plurality of slot wedges 131 arranged circumferentially along the stator core 11. The circumferential arrangement allows the slot wedges 131 to be evenly distributed in the circumferential direction of the stator core 11, corresponding to the position of the stator slot 111, and serving to close the stator slot 111.

[0060] The end of the slot wedge 131 has a fitting portion 1311 extending circumferentially into the stator core 11. The fitting portion 1311 is fitted into the stator slot 111 and abuts against the toothed shoe portion 1121 in the radial direction of the stator core 11. When the fitting portion 1311 is inserted into the stator slot 111, the fitting portion 1311 and the toothed shoe portion 1121 come into contact with each other in the radial direction of the stator core 11 and generate a resisting force, which can effectively fix the stator winding 12. By the mutual abutment between the fitting portion 1311 and the toothed shoe portion 1121 in the radial direction, it is ensured that the slot wedge 131 will not move towards the center or the outside of the stator, thereby firmly fixing the stator winding 12 and reliably sealing the opening of the stator slot 111, so that the cooling medium in the slot flow channel 14 will not leak, and ensuring the stable flow of the cooling medium in the slot flow channel 14.

[0061] The motor according to this utility model is briefly described below.

[0062] The motor according to this utility model includes the stator assembly 1 in any of the above embodiments. Since the motor according to this utility model includes the stator assembly 1 in any of the above embodiments, the cooling medium can directly act on the stator winding 12, effectively improving heat dissipation efficiency, reducing winding temperature rise, and significantly mitigating the risks of insulation aging, performance degradation, and burnout caused by overheating.

[0063] The motor according to this embodiment can be used as both a drive motor and a generator. When used as a drive motor, the cooling medium can directly act on the stator winding 12, improving heat dissipation efficiency and effectively reducing the temperature rise of the winding during operation. This not only helps reduce energy loss caused by overheating and improves the overall energy conversion efficiency of the motor, but also significantly alleviates the risks of insulation aging, performance degradation, and even burnout caused by overheating, thereby extending the service life of the drive motor and ensuring its long-term stable operation, providing reliable and efficient power support for various power-driven devices. When used as a generator, the motor, thanks to the efficient heat dissipation characteristics of the stator assembly, can maintain a low winding temperature during long-term, high-load power generation. The lower winding temperature can effectively reduce the thermal stress of the insulation material, slow down the rate of insulation aging, and thus improve the reliability and stability of the generator.

[0064] The vehicle according to this utility model is briefly described below.

[0065] The vehicle according to this utility model includes the motor in any of the above embodiments. Because the vehicle according to this utility model includes the motor in any of the above embodiments, the vehicle's power system operates more stably, significantly reducing the risk of failures caused by overheating, and its overall performance and durability are significantly improved.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator assembly characterized by, include: Housing assembly (10); A stator core (11) is housed within the housing assembly (10). The stator core (11) has a plurality of stator slots (111) spaced apart circumferentially. Each stator slot (111) has an opening that opens radially inward along the stator core (11). Stator winding (12), at least a portion of which is embedded in the stator slot (111); Slot wedge assembly (13), the slot wedge assembly (13) is disposed on the radial inner side of the stator core (11) and closes the openings of the plurality of stator slots (111); In this configuration, each stator slot (111) has a slot wall and a stator winding (12) embedded in the stator slot (111) forming a slot flow channel (14) extending axially along the stator core (11). One end of the housing assembly (10) is provided with a medium inlet (1011) communicating with the inlets of the multiple slot flow channels (14), and the other end of the housing assembly (10) is provided with a medium outlet (1012) communicating with the outlets of the multiple slot flow channels (14).

2. The stator assembly of claim 1, wherein, A flow channel (15) extending circumferentially along the stator core (11) is defined between the housing assembly (10) and at least one end of the stator core (11), and at least another portion of the stator winding (12) is received within the flow channel (15). The guide channel (15) is connected to the medium inlet (1011) and the inlet of the multiple in-slot channels (14), or the guide channel (15) is connected to the medium outlet (1012) and the outlet of the multiple in-slot channels (14).

3. The stator assembly of claim 2, wherein, The housing assembly (10) includes: A first housing (101) is disposed at least partially around the outer periphery of the stator core (11); The second housing (102) is disposed at at least one axial end of the stator core (11), the second housing (102) is connected to the first housing (101), and the flow channel (15) is defined between the second housing (102) and at least one end of the stator core (11).

4. The stator assembly of claim 3, wherein, The second housing (102) includes: A radial extension segment (1021) is constructed as an annulus surrounding the central axis of the stator core (11). One end of the radial extension segment (1021) is connected to the first housing (101), and the other end of the radial extension segment (1021) extends radially inward along the stator core (11). An axial extension segment (1022) is constructed as an annulus surrounding the central axis of the stator core (11). One end of the axial extension segment (1022) is connected to the radial inner edge of the radial extension segment (1021), and the other end of the axial extension segment (1022) extends along the axial direction of the stator core (11) toward the end face of the stator core (11). The flow channel (15) is defined between the axial extension segment (1022), the radial extension segment (1021), and the end face of the stator core (11).

5. The stator assembly of claim 3, wherein, An outer peripheral flow channel (16) suitable for the flow of cooling medium is formed between the outer peripheral wall of the stator core (11) and the inner peripheral wall of the first housing (101), and at least one end of the outer peripheral flow channel (16) is connected to the guide flow channel (15).

6. The stator assembly of claim 5, wherein, The outer peripheral wall of the stator core (11) is formed with an axially extending flow channel groove (113) that is open at both ends, and the outer peripheral flow channel (16) is formed between the groove wall of the flow channel groove (113) and the inner peripheral wall of the first housing (101).

7. The stator assembly of claim 6, wherein, The flow channel grooves (113) are configured as a plurality of grooves spaced apart circumferentially along the stator core (11).

8. The stator assembly of claim 1, wherein, The stator core (11) is formed with a plurality of stator teeth (112) spaced apart in the circumferential direction, and the stator slot (111) is defined between two adjacent stator teeth (112). Each stator tooth (112) has a toothed shoe (1121) extending in the circumferential direction of the stator core (11) at its end, and the stator slot (111) has an opening between two adjacent toothed shoes (1121). The slot wedge assembly (13) includes a plurality of slot wedges (131) arranged circumferentially along the stator core (11), the ends of the slot wedges (131) having a fitting portion (1311) extending circumferentially in the stator core (11), the fitting portion (1311) being fitted into the stator slot (111) and abutting against the toothed shoe portion (1121) radially in the stator core (11).

9. An electric motor comprising a stator assembly (1) as described in any one of claims 1-8.

10. A vehicle comprising the motor of claim 9.

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