Rotor composite support and global layered oil injection circulating cooling motor module

Abstract

The invention relates to the technical field of motors, in particular to a rotor composite support and global layered oil injection circulating cooling motor module which comprises an axial magnetic flux joint motor and a secondary planetary reducer. The axial magnetic flux joint motor adopts a double-stator / single-rotor topology; the axial magnetic flux joint motor comprises a non-driving end stator, a driving end stator and a rotor. The non-driving end stator comprises a non-driving end cover, a non-driving end stator winding and a non-driving end stator iron core. The driving end stator comprises a driving end cover, a driving end stator winding and a driving end stator iron core; a rotor of the axial magnetic flux joint motor is provided with a plurality of sets of guide wheels in the circumferential direction, and the guide wheels are arranged on the periphery of a non-driving end cover, extend into a groove of a rotor support and are used for limiting and supporting the rotor in the axial direction. According to the invention, the stability and precision of the rotor under high torque output are ensured through the composite support structure, and the winding, the iron core and the permanent magnet are cooled through the global layered oil injection circulating cooling system.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a motor module with rotor composite support and full-area layered oil spray circulation cooling. Background Technology

[0002] Currently, most joint motors used in humanoid robots rely on natural heat dissipation for cooling. However, under conditions of short-term high load, long-distance running under rated load, and overload, natural cooling often fails to meet the heat dissipation requirements. Overheating can lead to faults such as controller overcurrent protection shutdown and motor insulation degradation and burnout. Therefore, in order to meet the challenges of the above conditions, it is increasingly urgent to develop joint motors with high heat dissipation efficiency.

[0003] An axial flux joint motor system with integrated oil-spray micro-circulation cooling (authorization announcement number: CN118713376B) employs a combination of direct oil spray cooling at the stator winding ends and circulating oil cooling for the stator core. The end face of the end cover cavity uses a single spiral oil channel. The outermost ring of the spiral oil channel is designed with small oil spray holes to spray oil onto the outer ends of the stator windings, while the innermost ring is designed with small oil spray holes to spray oil onto the inner ends of the stator windings. The middle oil channel of the spiral oil channel circulates and cools the stator core. This effectively solves the heat dissipation problem of the stator section and creates a lower internal temperature environment for the motor. However, the heat dissipation capacity of the rotor magnets remains relatively low under high load conditions.

[0004] Axial flux motors are often troubled by uneven physical air gaps on both sides of the rotor assembly, or by unbalanced axial forces caused by factors such as armature reaction and suction deformation. This can lead to excessive bearing load or even accidents such as bearing seizure and stator-rotor scraping. This problem is particularly prominent in large-diameter, high-speed axial flux motors.

[0005] Traditional oil-cooled motors, such as the YASA axial flux motor, often employ a closed stator oil-cooling scheme, neglecting the rotor's heat dissipation requirements. Under high load conditions, this frequently leads to demagnetization of the rotor magnets. To improve stator slot fill factor, flat wire windings have been commonly used in recent years, employing a closed stator oil-cooling scheme. However, this leaves very limited space for oil channels, which increases the resistance of the flow path and reduces the heat exchange efficiency of the oil-cooling scheme. Summary of the Invention

[0006] To address the aforementioned issues, this invention ensures the stability and accuracy of the rotor under high torque output through the composite support structure. The full-area layered oil spray circulation cooling system achieves efficient and targeted cooling of the stator windings, stator core, and permanent magnets. Combined with the layered core design, it effectively reduces iron loss and significantly improves the power density, efficiency, and reliability of the motor module. This results in a motor module with rotor composite support and full-area layered oil spray circulation cooling.

[0007] The technical solution adopted in this invention is: a motor module with rotor composite support and full-area layered oil spray circulation cooling, including an axial flux joint motor and a two-stage planetary reducer; the axial flux joint motor adopts a dual stator / single rotor topology; The axial flux joint motor includes a non-driving end stator, a driving end stator, and a rotor. The non-driving end stator includes a non-driving end cover, a non-driving end stator winding, and a non-driving end stator core. The driving end stator includes a driving end cover, a driving end stator winding, and a driving end stator core. The rotor of the axial flux joint motor is equipped with multiple sets of guide wheels along the circumferential direction. The guide wheels are set on the outer periphery of the non-drive end cover and extend into the groove of the rotor support, which is used to limit and support the rotor in the axial direction. The non-drive end stator is provided with a non-drive oil injection mechanism for oil injection cooling of the non-drive end stator winding; the drive end stator is provided with a drive oil injection mechanism for oil injection cooling of the drive end stator winding.

[0008] A further improvement to the above scheme is that the non-drive end cap is provided with a first oil inlet and a first annular oil passage structure. The first annular oil passage structure includes a first oil passage, a second oil passage, a third oil passage and a fourth oil passage. Each oil passage is independent of each other and arranged in parallel. Each oil passage is connected to the first oil inlet.

[0009] A further improvement to the above scheme is that the first oil passage corresponds to the outer end winding of the non-driving stator winding; the second oil passage corresponds to the second oil injection hole of the non-driving stator core; the third oil passage corresponds to the first oil injection hole of the stator core, and the circulating oil of the third oil passage is sprayed along the first oil injection hole to cool the non-driving stator core and the winding portion inside the slot of the non-driving stator winding; the fourth oil passage corresponds to the inner end winding of the non-driving stator winding.

[0010] A further improvement to the above scheme is that the drive end cap is provided with a second oil inlet and a second annular oil passage structure. The second annular oil passage structure includes a fifth oil passage, a sixth oil passage, a seventh oil passage, and an eighth oil passage. Each oil passage is independent of each other and arranged in parallel, and each oil passage is connected to the second oil inlet.

[0011] A further improvement to the above scheme is that the fifth oil passage corresponds to the outer end winding of the drive-end stator winding; the sixth oil passage corresponds to the second oil injection hole of the drive-end stator core; the seventh oil passage corresponds to the fifth oil injection hole of the stator core, and the circulating oil of the seventh oil passage is sprayed along the fifth oil injection hole to cool the drive-end stator core and the winding portion in the drive-end stator winding slot; the eighth oil passage corresponds to the inner end winding of the drive-end stator winding.

[0012] A further improvement to the above scheme is that the non-drive oil injection mechanism includes a first oil baffle ring and a second oil baffle ring on the inner end face of the non-drive stator; the first oil baffle ring has a plurality of second oil injection holes on its circumference, and the second oil baffle ring has a plurality of third oil injection holes on its circumference.

[0013] A further improvement to the above scheme is that the driving oil injection mechanism includes a third oil baffle ring and a fourth oil baffle ring on the inner end face of the stator at the driving end. The third oil baffle ring has a plurality of fifth oil injection holes on its circumference, and the fourth oil baffle ring has a sixth oil injection hole on its circumference.

[0014] A further improvement to the above scheme is that the rotor support includes a first rotor support and a second rotor support, the first rotor support and the second rotor support are mounted on the main shaft, and a first magnet and a second magnet are pressed and fixed on the rotor support; the guide wheel includes a bearing and a pin, the bearing is set in a hole on the outer circumference of the non-drive end cover, one end of the pin is connected to the bearing, and the other end is embedded in the concave track of the first rotor support.

[0015] A further improvement to the above scheme is that the non-driving end stator core adopts a radial three-layer design, including a first layer of non-driving end stator core, a second layer of non-driving end stator core, and a third layer of non-driving end stator core; a first insulating layer is provided between the first layer of non-driving end stator core and the second layer of non-driving end stator core; a second insulating layer is provided between the second layer of non-driving end stator core and the third layer of non-driving end stator core.

[0016] A further improvement to the above scheme is that the drive-end stator core adopts a radial three-layer design, including a first-layer drive-end stator core, a second-layer drive-end stator core, and a third-layer drive-end stator core; a third insulating layer is provided between the first-layer drive-end stator core and the second-layer drive-end stator core; and a fourth insulating layer is provided between the second-layer drive-end stator core and the third-layer drive-end stator core.

[0017] A further improvement to the above scheme is that the non-drive end stator is provided with a first slot wedge, the first slot wedge is provided with two rectangular slots, the cooling oil enters from the first oil inlet, a first part of the oil is sprayed out from the yoke of the non-drive end stator core, through the slot gap of the non-drive end stator winding and the two rectangular slots of the first slot wedge; the other part is sprayed out from the first oil injection hole and the second oil injection hole and sprayed onto the first magnet.

[0018] A further improvement to the above scheme is that the drive end stator core is provided with a second slot wedge, the second slot wedge is provided with two rectangular slots, the cooling oil enters from the second oil inlet, the first part passes through the yoke of the drive end stator core and is sprayed out, passing through the slot gap of the drive end stator winding and the two rectangular slots of the second slot wedge; the other part is sprayed out from the third oil injection hole and the fourth oil injection hole and sprayed onto the second magnet.

[0019] The beneficial effects of this invention are: Compared to existing axial flux motors, the rotor of this invention features a composite support consisting of radial bearings combined with axial bearing support provided by eight sets of circumferential guide wheels. This improves the stability of rotor operation, achieving an effect similar to that of a thrust ball bearing. It also solves the problem of bearing overheating and seizing caused by axial force generated by air gap imbalance acting on the bearings on both sides.

[0020] The stator core is made of SMC or silicon steel sheets and uses a radial layered design. It is then isolated with insulating paper, which completely solves the problem of core conductivity caused by the yoke of the stator core being attached to the end cover in the traditional solution. The layered design also reduces the loss of the stator core itself.

[0021] The meaning of full-area layered oil injection circulation cooling is that four parallel branch oil channels are defined, which reduces the resistance of the flow path. The cooling oil is sprayed onto the heat source (stator core, stator winding, rotor magnet) at a relatively fast injection speed, taking into account the heat dissipation requirements of the heat source and achieving the effect of rapid full-area cooling.

[0022] The two-stage planetary reducer is configured with one small and one large component, significantly reducing the axial dimension of the joint motor module. The end cap's circulating oil cooling system provides an excellent low-temperature environment for the motor controller's power module while simultaneously cooling the joint motor, effectively controlling the temperature rise of both the motor and controller and improving the motor's ability to withstand heavy loads. Attached Figure Description

[0023] Figure 1 This is a perspective view of the motor module with full-area layered oil spray circulation cooling according to the present invention. Figure 2 This is a first cross-sectional view of the axial flux joint motor of the present invention; Figure 3 This is a second cross-sectional view of the axial flux joint motor of the present invention; Figure 4 This is a third cross-sectional view of the axial flux joint motor of the present invention; Figure 5 This is a schematic diagram of the axial flux joint motor rotor of the present invention; Figure 6 This is a schematic diagram of the axial flux joint motor stator of the present invention; Figure 7This is a layout diagram of the oil passages in the end cover of the axial flux joint motor of the present invention; Figure 8 This is an exploded view of the axial flux joint motor of the present invention.

[0024] Figure labeling: 1 Axial flux motor; 2 Two-stage planetary reducer; 100 Non-driving end stator, 101 Non-driving end cover, 101a First oil inlet, 101b First oil passage, 101c Second oil passage, 101d Third oil passage, 101e Fourth oil passage, 102 Non-driving end stator winding, 103 Non-driving end stator core, 103a First layer of non-driving end stator core, 103b Second layer of non-driving end stator core, 103c Third layer of non-driving end stator core, 103d First oil injection hole, 103e Second oil injection hole, 104 First oil baffle ring, 104a Third oil injection hole, 105 Second oil baffle ring, 105a Fourth oil injection hole, 106a First insulation layer, 106b Second insulation layer, 107 First slot wedge; 200 Drive end stator, 201 Drive end end cover, 201a Second oil inlet, 201b Fifth oil passage, 201c Sixth oil passage, 201d Seventh oil passage, 201e Eighth oil passage, 202 Drive end stator winding, 203 Drive end stator core, 203a First layer drive end stator core, 203b Second layer drive end stator core, 203c Third layer drive end stator core, 203d Fifth oil injection hole, 203e Sixth oil injection hole, 204 Third oil baffle ring, 204a Seventh oil injection hole, 205 Fourth oil baffle ring, 205a Eighth oil injection hole, 206a Third insulation layer, 206b Fourth insulation layer, 207 Second slot wedge; 300 Rotor, 301 Main shaft, 302a First magnet, 302b Second magnet, 303 Rotor support, 303a First rotor support, 303b Second rotor support, 304a First bearing, 304b Second bearing, 305a First guide wheel, 305b Second guide wheel, 305c Third guide wheel, 305d Fourth guide wheel, 305e Fifth guide wheel, 305f Sixth guide wheel, 305g Seventh guide wheel, 305h Eighth guide wheel. Detailed Implementation

[0025] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-8 As shown, in one embodiment of the present invention, a motor module with rotor composite support and full-area layered oil injection circulation cooling is provided, such as... Figure 1 As shown, it includes an axial flux joint motor 1 and a two-stage planetary reducer 2. The axial flux joint motor 1 adopts a dual-stator / single-rotor topology, which has the advantages of high torque density and efficient heat dissipation.

[0028] like Figure 2 and Figure 3 As shown, the axial flux joint motor 1 includes a non-driving end stator 100, a driving end stator 200, and a rotor 300. The non-driving end stator 100 and the driving end stator 200 are fixedly connected by screws.

[0029] Specifically, the non-driving end stator 100 includes a non-driving end cover 101, a non-driving end stator winding 102, and a non-driving end stator core 103. The driving end stator 200 includes a driving end cover 201, a driving end stator winding 202, and a driving end stator core 203.

[0030] To further optimize heat dissipation, the non-drive stator 100 is provided with a non-drive oil injection mechanism for spraying oil to cool the non-drive stator winding 102. This mechanism includes a first non-drive oil baffle ring 104 and a second non-drive oil baffle ring 105 disposed on the inner end face of the non-drive stator 100. The first non-drive oil baffle ring 104 has multiple third oil injection holes 104a around its circumference, and the second non-drive oil baffle ring 105 has multiple fourth oil injection holes 105a around its circumference.

[0031] Similarly, the drive-end stator 200 is provided with a drive oil injection mechanism for spraying oil to cool the drive-end stator winding 202. This mechanism includes a third drive-end oil baffle ring 204 and a fourth drive-end oil baffle ring 205 disposed on the inner end face of the drive-end stator 200. The third drive-end oil baffle ring 204 has a plurality of seventh oil injection holes 204a around its circumference, and the fourth drive-end oil baffle ring 205 has a plurality of eighth oil injection holes 205a around its circumference.

[0032] To achieve stable support for the rotor 300, this invention employs a composite support structure. For example... Figure 3 , Figure 4 , Figure 5 As shown, the rotor support 303 of the rotor 300 includes a first rotor support 303a and a second rotor support 303b. The first rotor support 303a and the second rotor support 303b are fitted onto the main shaft 301 and fixed with screws. A first magnet 302a and a second magnet 302b are pressed and fixed onto the rotor support 303.

[0033] The rotor 300 is equipped with multiple sets of guide wheels 305 along its circumference, including a first guide wheel 305a, a second guide wheel 305b, a third guide wheel 305c, a fourth guide wheel 305d, a fifth guide wheel 305e, a sixth guide wheel 305f, a seventh guide wheel 305g, and an eighth guide wheel 305h. Each set of guide wheels 305 consists of a bearing and a pin. The bearing is disposed in a hole on the outer circumference of the non-drive end cover 101. One end of the pin is connected to the bearing, and the other end is embedded in the concave track of the first rotor support 303a, for axial limiting support of the rotor 300. In addition, the first bearing 304a and the second bearing 304b are distributed at both ends of the rotor 300, providing radial support. The multiple sets of guide wheels 305, together with the first bearing 304a and the second bearing 304b, constitute the composite support system of the rotor 300.

[0034] To achieve precise, layered oil spray cooling across the entire surface, the non-drive end cap 101 is provided with a first oil inlet 101a and a first annular oil passage structure. For example... Figure 7 As shown, the first annular oil passage structure includes a first oil passage 101b, a second oil passage 101c, a third oil passage 101d, and a fourth oil passage 101e. Each oil passage is independent of the others and arranged in parallel, and all are connected to the first oil inlet 101a.

[0035] The first oil passage 101b corresponds to the outer end winding of the non-driving stator winding 102, and its circulating oil is sprayed out through the third oil spray hole 104a to cool the outer end of the winding; the second oil passage 101c corresponds to the second oil spray hole 103e of the non-driving stator core 103, and its circulating oil is used to cool the core and the winding in the slot; the third oil passage 101d corresponds to the first oil spray hole 103d of the non-driving stator core 103, and its circulating oil is used to cool the core and the winding in the slot; the fourth oil passage 101e corresponds to the inner end winding of the non-driving stator winding 102, and its circulating oil is sprayed out through the fourth oil spray hole 105a to cool the inner end of the winding.

[0036] Similarly, the drive end cap 201 is provided with a second oil inlet 201a and a second annular oil passage structure. The second annular oil passage structure includes a fifth oil passage 201b, a sixth oil passage 201c, a seventh oil passage 201d, and an eighth oil passage 201e. Each oil passage is independent of the others and arranged in parallel, and all are connected to the second oil inlet 201a.

[0037] The fifth oil passage 201b corresponds to the outer end winding of the drive-end stator winding 202, and its circulating oil is sprayed out through the seventh oil injection hole 204a; the sixth oil passage 201c corresponds to the sixth oil injection hole 203e of the drive-end stator core 203; the seventh oil passage 201d corresponds to the fifth oil injection hole 203d of the drive-end stator core 203; the eighth oil passage 201e corresponds to the inner end winding of the drive-end stator winding 202, and its circulating oil is sprayed out through the eighth oil injection hole 205a.

[0038] To further reduce iron loss, the non-drive end stator core 103 adopts a radial three-layer design, such as... Figure 6 As shown, it includes a first non-driving end stator core 103a, a second non-driving end stator core 103b, and a third non-driving end stator core 103c. A first insulating layer 106a is provided between the first non-driving end stator core 103a and the second non-driving end stator core 103b for isolation; a second insulating layer 106b is provided between the second non-driving end stator core 103b and the third non-driving end stator core 103c for isolation.

[0039] The drive-end stator core 203 also adopts a radially three-layer design, comprising a first-layer drive-end stator core 203a, a second-layer drive-end stator core 203b, and a third-layer drive-end stator core 203c. A third insulating layer 206a is provided between the first-layer drive-end stator core 203a and the second-layer drive-end stator core 203b for isolation; a fourth insulating layer 206b is provided between the second-layer drive-end stator core 203b and the third-layer drive-end stator core 203c for isolation.

[0040] The final flow direction of the cooling oil is as follows: In the non-drive end stator 100, the cooling oil enters from the first oil inlet 101a, part of which flows through the yoke of the non-drive end stator core 103, passes through the slot gap of the non-drive end stator winding 102, and is finally sprayed out from the two rectangular slots of the first slot wedge 107; the other part is sprayed out from the first oil spray hole 103d and the second oil spray hole 103e, and is directly sprayed onto the first magnet 302a to cool it.

[0041] In the drive-end stator 200, cooling oil enters from the second oil inlet 201a. Part of it flows through the yoke of the drive-end stator core 203, passes through the slot gap of the drive-end stator winding 202, and is finally sprayed out from the two rectangular slots of the second slot wedge 207. The other part is sprayed out from the fifth oil injection hole 203d and the sixth oil injection hole 203e, and is directly sprayed onto the second magnet 302b to cool it.

[0042] The present invention ensures the stability and accuracy of rotor 300 under high torque output through the composite support structure, and achieves efficient and targeted cooling of stator winding, stator core and permanent magnet through the full-domain layered oil injection circulation cooling system. Combined with the layered core design, it effectively reduces iron loss and significantly improves the power density, efficiency and reliability of motor module.

[0043] The second-stage planetary reducer 2 is configured with a small planetary reducer and a large planetary reducer.

[0044] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A motor module with rotor composite support and full-area layered oil spray circulation cooling, characterized in that: It includes an axial flux joint motor and a two-stage planetary reducer; the axial flux joint motor adopts a dual-stator / single-rotor topology; The axial flux joint motor includes a non-driving end stator, a driving end stator, and a rotor. The non-driving end stator includes a non-driving end cover, a non-driving end stator winding, and a non-driving end stator core. The driving end stator includes a driving end cover, a driving end stator winding, and a driving end stator core. The rotor of the axial flux joint motor is equipped with multiple sets of guide wheels along the circumferential direction. The guide wheels are set on the outer periphery of the non-drive end cover and extend into the groove of the rotor support, which is used to limit and support the rotor in the axial direction. The non-drive end stator is provided with a non-drive oil injection mechanism for oil injection cooling of the non-drive end stator winding; the drive end stator is provided with a drive oil injection mechanism for oil injection cooling of the drive end stator winding.

2. The motor module with rotor composite support and full-area layered oil spray circulation cooling according to claim 1, characterized in that: The non-drive end cap is provided with a first oil inlet and a first annular oil passage structure. The first annular oil passage structure includes a first oil passage, a second oil passage, a third oil passage and a fourth oil passage. Each oil passage is independent of each other and arranged in parallel. Each oil passage is connected to the first oil inlet.

3. The motor module with rotor composite support and full-area layered oil spray circulation cooling according to claim 2, characterized in that: The first oil passage corresponds to the outer end winding of the non-driving stator winding; the second oil passage corresponds to the second oil injection hole of the non-driving stator core; the third oil passage corresponds to the first oil injection hole of the stator core, and the circulating oil of the third oil passage is sprayed along the first oil injection hole to cool the non-driving stator core and the winding portion in the slot of the non-driving stator winding; the fourth oil passage corresponds to the inner end winding of the non-driving stator winding.

4. The motor module with rotor composite support and full-area layered oil spray circulation cooling according to claim 3, characterized in that: The drive end cap is provided with a second oil inlet and a second annular oil passage structure. The second annular oil passage structure includes a fifth oil passage, a sixth oil passage, a seventh oil passage, and an eighth oil passage. Each oil passage is independent of each other and arranged in parallel. Each oil passage is connected to the second oil inlet.

5. The motor module with rotor composite support and full-area layered oil spray circulation cooling according to claim 4, characterized in that: The fifth oil passage corresponds to the outer end winding of the drive-end stator winding; the sixth oil passage corresponds to the second oil injection hole of the drive-end stator core; the seventh oil passage corresponds to the fifth oil injection hole of the stator core, and the circulating oil of the seventh oil passage is sprayed along the fifth oil injection hole to cool the drive-end stator core and the winding portion in the drive-end stator winding slot; the eighth oil passage corresponds to the inner end winding of the drive-end stator winding.

6. The motor module with rotor composite support and full-area layered oil spray circulation cooling according to claim 1, characterized in that: The non-drive oil injection mechanism includes a first oil baffle ring and a second oil baffle ring on the inner end face of the non-drive stator; the first oil baffle ring has a plurality of second oil injection holes on its circumference, and the second oil baffle ring has a plurality of third oil injection holes on its circumference.

7. The motor module with rotor composite support and full-area layered oil spray circulation cooling according to claim 6, characterized in that: The drive injection mechanism includes a third oil baffle ring and a fourth oil baffle ring on the inner end face of the stator at the drive end. The third oil baffle ring has a plurality of fifth injection holes on its circumference, and the fourth oil baffle ring has a sixth injection hole on its circumference.

8. The motor module with rotor composite support and full-area layered oil spray circulation cooling according to claim 1, characterized in that: The rotor support includes a first rotor support and a second rotor support, which are mounted on the main shaft. A first magnet and a second magnet are pressed and fixed on the rotor support. The guide wheel includes a bearing and a pin. The bearing is set in a hole on the outer circumference of the non-drive end cover. One end of the pin is connected to the bearing, and the other end is embedded in the concave track of the first rotor support.

9. The motor module with rotor composite support and full-area layered oil spray circulation cooling according to claim 7, characterized in that: The non-drive end stator core adopts a radial three-layer design, including a first layer of non-drive end stator core, a second layer of non-drive end stator core, and a third layer of non-drive end stator core; a first insulation layer is provided between the first layer of non-drive end stator core and the second layer of non-drive end stator core; a second insulation layer is provided between the second layer of non-drive end stator core and the third layer of non-drive end stator core. The drive-end stator core adopts a radial three-layer design, including a first-layer drive-end stator core, a second-layer drive-end stator core, and a third-layer drive-end stator core; a third insulating layer is provided between the first-layer drive-end stator core and the second-layer drive-end stator core; a fourth insulating layer is provided between the second-layer drive-end stator core and the third-layer drive-end stator core.

10. The motor module with rotor composite support and full-area layered oil spray circulation cooling according to claim 9, characterized in that: The non-drive end stator is provided with a first slot wedge, which has two rectangular slots. Cooling oil enters from the first oil inlet. A first part of the oil is sprayed out from the yoke of the non-drive end stator core, through the slot gap of the non-drive end stator winding, and through the two rectangular slots of the first slot wedge. The other part is sprayed out from the first and second oil injection holes and onto the first magnet. The drive end stator core is provided with a second slot wedge, which has two rectangular slots. Cooling oil enters from the second oil inlet. A first part of the oil is sprayed out through the yoke of the drive end stator core, passing through the slot gap of the drive end stator winding and the two rectangular slots of the second slot wedge. The other part is sprayed out from the third and fourth oil injection holes and sprayed onto the second magnet.

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