Self-cooling motor

Abstract

The present application relates to a radiator and a self-cooling motor, belonging to the field of motor heat dissipation technology, which includes a heat dissipation bracket, in which a plurality of heat dissipation air ducts, a first circulating oil channel and a second circulating oil channel are provided, the heat dissipation air ducts pass through the top and side walls of the heat dissipation bracket, the first circulating oil channel is arranged adjacent to the heat dissipation air duct, an oil inlet is provided on the side wall of the heat dissipation bracket, the oil inlet is connected to the first circulating oil channel, the second circulating oil channel is connected and arranged at the bottom of the heat dissipation bracket, the first circulating oil channel and the second circulating oil channel are connected, the heat dissipation bracket is provided with an oil outlet, and the oil outlet is connected to the second circulating oil channel. The present application has the effect of reducing the occupied space of the oil-cooled motor, facilitating the assembly and installation of the oil-cooled motor, so that it can be used in more scenes and improving its adaptability.

Description

Technical Field

[0001] The present application relates to the technical field of motor heat dissipation, and in particular to a self-heating motor. Background Art

[0002] The higher the motor speed, torque density and power density, the higher the heat it generates. Therefore, the heat dissipation and cooling structure of the motor are essential for the reliable, stable and efficient operation of the motor. The cooling of the motor can be divided into air cooling, water cooling and oil cooling. Oil cooling is becoming the first choice for high-performance motor cooling solutions due to its natural electrical insulation and high degree of freedom in structural design.

[0003] In oil-cooled motors, using wind to cool the cooling oil is a common method. The main cooling principle and process are as follows: The cooling oil circulates in the cooling circuit inside the motor. It absorbs the heat inside the motor by contacting the stator and other heat-generating components. After absorbing the heat, the cooling oil flows out of the motor through the pipe and enters the external radiator or cooler. The cooling oil flows through the air-cooled radiator installed outside the motor to dissipate heat. Then the oil pump re-injects the cooling oil into the motor.

[0004] The existing oil-cooled motor has a complex cooling system and requires additional space, which increases the size of the entire motor system and is not suitable for applications with limited space. In addition, when installing this type of motor, high precision is required for pipe wiring and connection, and multiple cooling oil pipelines and cooling air ducts are wound around the motor, making installation complicated. Summary of the invention

[0005] In order to reduce the space occupied by the oil-cooled motor, facilitate the assembly and installation of the oil-cooled motor, enable it to be used in more scenarios, and improve its adaptability, the present application provides a self-heating motor.

[0006] The present application provides a self-heating motor adopting the following technical solution:

[0007] A self-heating motor comprises a heat dissipation bracket, wherein a plurality of heat dissipation air ducts, a first circulating oil channel and a second circulating oil channel are provided in the heat dissipation bracket, wherein the heat dissipation air ducts pass through the top and side walls of the heat dissipation bracket, wherein the first circulating oil channel is arranged adjacent to the heat dissipation air ducts, wherein an oil inlet is provided on the side wall of the heat dissipation bracket, wherein the oil inlet is connected to the first circulating oil channel, wherein the second circulating oil channel is connected and arranged at the bottom of the heat dissipation bracket, wherein the first circulating oil channel is connected to the second circulating oil channel, wherein the heat dissipation bracket is provided with an oil outlet, wherein the oil outlet is connected to the second circulating oil channel.

[0008] By adopting the above technical scheme, the stator can be installed on the heat dissipation bracket, and the stator can be sealed. The sealed space surrounding the stator, the first circulation oil channel and the second circulation oil channel are filled with cooling oil, so that the stator is immersed in the cooling oil. Then, a heat dissipation fan and an oil pump are installed on the heat dissipation bracket. When cooling, the cooling oil cools the stator and absorbs heat. The heat dissipation fan and the oil pump are continuously started. The oil pump transports the cooling oil with low temperature in the second circulation oil channel to the sealed space through the oil outlet, and then the cooling oil with high temperature flows into the first circulation oil channel through the oil inlet. The heat dissipation fan causes continuous gas flow in the heat dissipation air duct, thereby cooling the cooling oil with high temperature in the first circulation oil channel. The cooled cooling oil flows into the second circulation oil channel and is discharged by the oil pump again to cool the stator.

[0009] The heat sink can be used not only as a mounting seat for the stator, but also as a mounting seat for the oil pump and the cooling fan, so that the entire cooling system can be integrated into the motor and no external complex heat dissipation pipeline is required, thus simplifying the structural design and facilitating the installation of the motor.

[0010] This can reduce the space occupied by the oil-cooled motor, facilitate the assembly and installation of the oil-cooled motor, and enable it to be used in more scenarios, improving its adaptability. Compared with air-cooled motors, the oil-cooled motor using the heat sink has better heat dissipation effect, can absorb and conduct heat more effectively, can provide a higher speed, and has a reduced volume, so it can be better used in electric vehicles, electric propulsion aircraft and other fields.

[0011] Optionally, the heat dissipation bracket includes a first cylindrical frame and a second cylindrical frame, the outer diameter of the first cylindrical frame is smaller than the outer diameter of the second cylindrical frame, and the first cylindrical frame and the second cylindrical frame are integrally formed and coaxially arranged;

[0012] The heat dissipation duct is opened along the axial direction of the first cylindrical frame and the radial direction of the second cylindrical frame, one end of the heat dissipation duct passes through the top surface of the first cylindrical frame, and the other end of the heat dissipation duct passes through the side wall of the second cylindrical frame, and a plurality of the heat dissipation ducts are arranged equidistantly around the central axis of the first cylindrical frame.

[0013] Optionally, the first circulating oil channel is a spiral channel, the first circulating oil channel is located between the heat dissipation air channel and the outer side wall of the first cylindrical frame, the first circulating oil channel is arranged around a plurality of the heat dissipation air channels, and the oil inlet is opened on the side wall of the first cylindrical frame;

[0014] The second circulating oil passage is opened in the second cylindrical frame, and the oil outlet is opened on the top surface of the second cylindrical frame.

[0015] By adopting the above technical solution, the first circulating oil channel is arranged around a plurality of heat dissipation air ducts, and the plurality of heat dissipation air ducts are ventilated at the same time, which can accelerate the cooling of the cooling oil, thereby further improving the heat dissipation effect.

[0016] Optionally, a plurality of fins are provided in each of the heat dissipation ducts, the fins are L-shaped and matched with the heat dissipation duct, and the plurality of fins divide the heat dissipation duct into a plurality of independent ventilation ducts.

[0017] By adopting the above technical solution, the fins make the gas evenly distributed in the heat dissipation duct, further increasing the heat dissipation capacity, and at the same time the fins also improve the structural strength of the heat dissipation frame.

[0018] Optionally, the first cylindrical frame and the second cylindrical frame are jointly provided with an installation channel, the installation channel is coaxial with the first cylindrical frame and the second cylindrical frame, and the installation channel passes through the top surface of the first cylindrical frame and the bottom surface of the second cylindrical frame.

[0019] By adopting the above technical solution, the installation channel can provide installation space for various components and connectors of the cooling fan and the oil pump, further reducing the space occupied.

[0020] Optionally, the second circulating oil channel includes a first arc flow channel, a second arc flow channel, a third arc flow channel and an oil pump mounting groove, the oil pump mounting groove is located at the center of the second cylindrical frame, the first arc flow channel is located between the second arc flow channel and the third arc flow channel, the second arc flow channel is located between the oil pump mounting groove and the first arc flow channel, the first arc flow channel is connected to the second arc flow channel, the oil pump mounting groove is connected to the second arc flow channel and the third arc flow channel, the first arc flow channel is connected to the first circulating oil channel, the third arc flow channel is connected to the oil outlet, and the oil pump mounting groove is connected to the mounting channel.

[0021] By adopting the above technical solution, after the cooling oil is cooled, it flows from the first circulating oil channel into the first arc-shaped flow channel, and the cooling oil flows from the first circulating flow channel to the second circulating flow channel. The oil pump is installed in the oil pump installation groove, and the oil pump draws the cooling oil from the second circulating flow channel to the third arc-shaped flow channel. Finally, the cooling oil is discharged from the second cylindrical frame from the oil outlet. Such a flow channel design can increase the contact area between the cooling oil and the second cylindrical frame. A controller can be installed at the bottom of the second cylindrical frame so that the cooling oil can also fully dissipate the heat of the controller.

[0022] Optionally, a floating piston is provided in the third arc-shaped flow channel.

[0023] By adopting the above technical solution, the design of the floating piston can compensate for the volume change of the cooling oil caused by the temperature change of the cooling oil, so that the liquid pressure in the second circulation oil channel remains stable.

[0024] Optionally, it includes a stator and a rotor, a sealing shell is installed on the first cylindrical frame, the first cylindrical frame, the second cylindrical frame and the sealing shell form a sealed space, the stator is sleeved on the first cylindrical frame and located in the sealed space, the sealed space is communicated with the oil inlet and the oil outlet, the rotor is sleeved on the sealing shell, the rotor is coaxially connected with a centrifugal fan, the ventilation cavity of the centrifugal fan is communicated with the heat dissipation duct, a centrifugal pump is installed in the installation channel, the oil outlet and oil inlet ends of the centrifugal pump are located in the oil pump installation groove, and the centrifugal pump is coaxially connected to the centrifugal fan.

[0025] By adopting the above technical solution, after the stator is energized, the rotor rotates. When the rotor drives the external equipment connected to it, it also drives the centrifugal fan to start. The centrifugal fan starts and controls the centrifugal pump to start, thereby circulating and cooling the cooling oil to achieve cooling of the stator. Compared with traditional oil-cooled motors, there is no need to redesign additional drive systems and control systems to start the centrifugal fan and centrifugal pump, which simplifies the structural design, reduces space occupancy, and facilitates assembly and installation, so that it can be used in more scenarios and improves its adaptability.

[0026] Optionally, the centrifugal fan is connected to a first rotating shaft, a bearing is provided on the first rotating shaft, the first rotating shaft is connected to a connecting plate, the connecting plate is connected to a second rotating shaft, the second rotating shaft is connected to the centrifugal pump, and the bearing, the first rotating shaft, the connecting plate and the second rotating shaft are all located in the installation channel.

[0027] By adopting the above technical solution, the rotor drives the centrifugal fan to rotate, the centrifugal fan drives the first rotating shaft to rotate, the first rotating shaft drives the second rotating shaft, and the second rotating shaft drives the centrifugal pump to operate, thereby realizing synchronous operation of the centrifugal pump and the centrifugal fan.

[0028] Optionally, a controller is installed at the bottom of the second cylindrical frame, and a plurality of silicon carbide control modules are arranged on the inner top wall of the controller, and the plurality of silicon carbide control modules are directly opposite to the third arc-shaped flow channel.

[0029] By adopting the above technical solution, the cooling oil can also cool the silicon carbide control module at the same time, thereby realizing cooling of the controller.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. The oil-cooled motor using the heat sink has better heat dissipation effect than the air-cooled motor, can absorb and conduct heat more effectively, can provide higher speed, and has reduced volume, so it can be better applied to high-power motors, vehicle power systems, industrial pumps, fans, electric transmission vehicles and electric propulsion aircraft.

[0032] 2. Realize instant start-up. The cooling system starts synchronously when the rotor starts, which can cool the motor immediately to avoid overheating at the beginning of operation and improve cooling efficiency;

[0033] 3. Synchronous adjustment is achieved. The speed of the centrifugal fan and centrifugal pump changes synchronously with the speed of the rotor. The cooling intensity can be automatically adjusted according to the change of the motor load to provide a more accurate cooling effect;

[0034] 4. Simplify system integration and reduce complexity. Directly coupling the cooling system with the rotor simplifies the control and integration of the cooling system. No additional sensors and controllers are required to start and adjust the cooling system separately. The synchronous operation design may reduce the number of independent components and reduce the complexity of maintenance and fault diagnosis.

[0035] 5. The cooling system and the rotor operate synchronously to ensure that the cooling system works properly every time the motor runs, reducing the risk of overheating caused by delayed startup or failure of the cooling system;

[0036] 6. Integrated designs are usually more compact and reliable, reducing external connections and possible leak points;

[0037] 7. The cooling system is load-dependent. When the load is low or idling, the cooling system automatically weakens, thereby saving energy and improving the energy efficiency of the overall system;

[0038] 8. The centrifugal fan and centrifugal pump only work when needed, avoiding the operation of the cooling system when it is not necessary, further saving energy;

[0039] 9. Better dynamic response. Since the operation of the cooling system is directly related to the speed of the rotor, the cooling capacity can quickly respond to changes in the motor's operating state and provide more stable and consistent temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0041] Figure 2 It is a structural schematic diagram of the embodiment of the present application for reflecting the heat dissipation air duct and the first circulation oil duct.

[0042] Figure 3 It is a structural schematic diagram of the second circulating oil channel used in an embodiment of the present application.

[0043] Figure 4 It is a schematic diagram of the overall structure of a self-heating motor according to an embodiment of the present application.

[0044] Figure 5 It is a structural schematic diagram of the embodiment of the present application for reflecting the stator, rotor, centrifugal fan and centrifugal pump.

[0045] Figure 6 It is a structural diagram of an embodiment of the present application for reflecting the arrangement of a silicon carbide control module.

[0046] Explanation of the reference numerals: 1. heat dissipation bracket; 11. first cylindrical frame; 111. stepped surface; 12. second cylindrical frame; 13. installation channel; 14. heat dissipation air duct; 15. fin; 16. first circulating oil channel; 17. oil inlet; 18. second circulating oil channel; 181. first arc flow channel; 182. second arc flow channel; 183. third arc flow channel; 184. oil pump installation groove; 19. oil outlet; 110. floating piston; 2. stator; 3. rotor; 4. controller; 41. silicon carbide control module; 42. low-voltage power connector; 43. CAN communication connector; 44. high-voltage DC connector; 5. sealing shell; 6. sealing ring; 7. centrifugal fan; 71. first rotating shaft; 72. bearing; 8. centrifugal pump; 81. second rotating shaft; 82. connecting plate. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-6 This application is described in further detail.

[0048] An embodiment of the present application discloses a heat sink.

[0049] like Figure 1 The heat sink includes a heat sink bracket 1, the longitudinal section of the heat sink bracket 1 is T-shaped, and the heat sink bracket 1 includes a first cylindrical frame 11 and a second cylindrical frame 12. The first cylindrical frame 11 and the second cylindrical frame 12 are integrally formed and coaxial, and the outer diameter of the first cylindrical frame 11 is smaller than the outer diameter of the second cylindrical frame 12. The first cylindrical frame 11 and the second cylindrical frame 12 are jointly provided with a mounting channel 13, which is a cylindrical channel, and the mounting channel 13 is coaxial with the first cylindrical frame 11 and the second cylindrical frame 12, and the mounting channel 13 passes through the top surface of the first cylindrical frame 11 and the bottom surface of the second cylindrical frame 12.

[0050] like Figure 1 and Figure 2The first cylindrical frame 11 and the second cylindrical frame 12 are jointly provided with a plurality of heat dissipation ducts 14, which are equally spaced around the central axis of the first cylindrical frame 11 and the second cylindrical frame 12. The heat dissipation ducts 14 are opened along the height direction of the first cylindrical frame 11 and pass through the top surface of the first cylindrical frame 11. The heat dissipation ducts 14 are opened along the radial direction of the second cylindrical frame 12 and pass through the circumferential surface of the second cylindrical frame 12. The longitudinal section of the heat dissipation duct 14 is L-shaped.

[0051] A plurality of fins 15 are arranged in the heat dissipation duct 14. The fins 15 are integrally formed with the first cylindrical frame 11 and the second cylindrical frame 12. The fins 15 are L-shaped and fit with the heat dissipation duct 14. The plurality of fins 15 divide the heat dissipation duct 14 into a plurality of independent ventilation ducts.

[0052] A first oil circulation passage 16 is provided in the first cylindrical frame 11. The first oil circulation passage 16 is a spiral passage. The first oil circulation passage 16 is arranged around a plurality of heat dissipation air passages 14. The first oil circulation passage 16 is located between the heat dissipation air passages 14 and the outer wall of the first cylindrical frame 11. An oil inlet 17 is provided on the side wall of the first cylindrical frame 11. The oil inlet 17 is connected to one end of the first oil circulation passage 16.

[0053] like Figure 1 , Figure 2 and Figure 3 A second oil circulation passage 18 is provided at the bottom of the second cylindrical frame 12. The second oil circulation passage 18 is located below the heat dissipation air duct 14. The second oil circulation passage 18 includes a first arc flow passage 181, a second arc flow passage 182, a third arc flow passage 183 and an oil pump mounting groove 184. The oil pump mounting groove 184 is a cylindrical groove. The oil pump mounting groove 184 is located at the center of the second cylindrical frame 12 and is coaxial with the mounting channel 13. The first arc flow passage 181 is located between the second arc flow passage 182 and the third arc flow passage 183. The second arc flow channel 182 is located between the oil pump installation groove 184 and the first arc flow channel 181, the first arc flow channel 181 is connected with the second arc flow channel 182, the oil pump installation groove 184 is connected with the second arc flow channel 182 and the third arc flow channel 183, the liquid inlet end of the first arc flow channel 181 is located between two adjacent heat dissipation air channels 14, and the first arc flow channel 181 extends upward along the height direction of the second cylindrical frame 12 to communicate with the liquid outlet end of the first circulation oil channel 16. The top surface of the second cylindrical frame 12 is provided with an oil outlet 19, the oil outlet 19 is located between the other two adjacent heat dissipation air channels 14, the liquid outlet end of the third arc flow channel 183 extends upward along the height direction of the second cylindrical frame 12 to communicate with the oil outlet 19, and the oil pump installation groove 184 is connected with the installation channel 13. A floating piston 110 is arranged in the third arc flow channel 183.

[0054] By using the heat dissipation frame, the stator 2 is installed on the heat dissipation bracket 1, and the stator 2 is sealed. The sealed space surrounding the stator 2, the first circulation oil channel 16 and the second circulation oil channel 18 are filled with cooling oil, so that the stator 2 is immersed in the cooling oil. Then, a heat dissipation fan and an oil pump are installed on the heat dissipation bracket 1. When cooling, the cooling oil cools the stator 2 to absorb heat. The heat dissipation fan and the oil pump are continuously started. The oil pump transports the low-temperature cooling oil in the second circulation oil channel 18 to the sealed space through the oil outlet 19, and then the high-temperature cooling oil flows into the first circulation oil channel 16 through the oil inlet 17. The heat dissipation fan causes the heat dissipation air duct 14 to form a continuous gas flow, thereby cooling the high-temperature cooling oil in the first circulation oil channel 16. The cooled cooling oil flows into the second circulation oil channel 18 and is discharged from the oil outlet 19 through the oil pump again to cool the stator 2.

[0055] The heat sink can not only serve as a mounting base for the stator 2, but also as a mounting base for the oil pump and the heat sink fan, so that the entire cooling system can be integrated into the motor and no external complex heat dissipation pipeline is required, thereby simplifying the structural design and facilitating the installation of the motor.

[0056] This can reduce the space occupied by the oil-cooled motor, facilitate the assembly and installation of the oil-cooled motor, and enable it to be used in more scenarios, improving its adaptability. Compared with air-cooled motors, the oil-cooled motor using the heat sink has better heat dissipation effect, can absorb and conduct heat more effectively, can provide a higher speed, and has a reduced volume, so it can be better used in electric vehicles, electric propulsion aircraft and other fields.

[0057] like Figure 4 , Figure 5 and Figure 6 The embodiment of the present application also provides a self-heating motor, and the heat dissipation frame using the embodiment of the present application includes a stator 2, a rotor 3 and a controller 4. The circumferential surface of the first cylindrical frame 11 is provided with a stepped surface 111, the stator 2 is sleeved in the first cylindrical frame 11, and the iron core of the stator 2 is supported on the stepped surface 111 of the first cylindrical frame 11, and the outer periphery of the first cylindrical frame 11 is provided with a sealing shell 5, and the sealing shell 5 is bolted to the top surface of the first cylindrical frame 11, and the circumferential surface of the second cylindrical frame 12 is provided with a sealing ring 6, and the inner wall of the sealing shell 5 is tightly pressed against the sealing ring 6. The sealing shell 5, the first cylindrical frame 11 and the second cylindrical frame 12 form a sealed space, and the stator 2 is located in the sealed space. The skeleton of the stator 2 on the side away from its iron core is tightly pressed against the inner wall of the sealing shell 5, and the sealed space is connected with the oil outlet 19 and the oil inlet 17.

[0058] The rotor 3 is sleeved on the sealing shell 5, and the rotor 3 is bolted to the centrifugal fan 7, and the centrifugal fan 7 is connected to the first rotating shaft 71, and the first rotating shaft 71 extends into the installation channel 13, and the first rotating shaft 71 is sleeved and installed with a bearing 72 at one end located in the installation channel 13, and the first rotating shaft 71 is bolted to the end away from the centrifugal fan 7. The connecting plate 82 is flat-keyed to the second rotating shaft 81, and the second rotating shaft 81 is connected to the centrifugal pump 8, and the oil outlet and oil inlet ends of the centrifugal pump 8 are located in the oil pump installation groove 184. The ventilation cavity of the centrifugal fan 7 is connected to the heat dissipation duct 14.

[0059] The sealed space, the first oil circulation passage 16 and the second oil circulation passage 18 are filled with cooling oil.

[0060] The controller 4 is fixed with the bottom bolts of the second cylindrical frame 12, and a plurality of silicon carbide control modules 41 are installed on the inner top wall of the controller 4, and the plurality of silicon carbide control modules 41 are distributed along the central axis of the rotor 3, and the plurality of silicon carbide control modules 41 are directly opposite to the third arc-shaped flow channel 183. The controller 4 also has components such as a drive board, a control board, a low-voltage power connector 42, a CAN communication connector 43, and a high-voltage DC connector 44 installed therein (the drive board and the control board are not shown in the figure).

[0061] After the stator 2 is powered on, the rotor 3 rotates. When the rotor 3 drives the external device connected to it, it also drives the centrifugal fan 7 to start. The centrifugal fan 7 drives the first rotating shaft 71 to rotate. The first rotating shaft 71 drives the second rotating shaft 81. The second rotating shaft 81 drives the centrifugal pump 8 to operate, thereby realizing the synchronous operation of the centrifugal pump 8 and the centrifugal fan 7, so that the cooling oil circulates and cools down, and the stator 2 is cooled. The iron core of the stator 2 is directly in contact with the first cylindrical frame 11, and another part of the heat of the iron core of the stator 2 is directly taken away by the first cylindrical frame 11. Compared with the traditional oil-cooled motor, it has the following advantages:

[0062] Realize instant start-up. The cooling system starts synchronously when the rotor 3 starts, which can cool the motor immediately to avoid overheating at the beginning of operation and improve cooling efficiency.

[0063] Synchronous adjustment is achieved. The speed of the centrifugal fan 7 and the centrifugal pump 8 changes synchronously with the speed of the rotor 3. The cooling intensity can be automatically adjusted according to the change of the motor load, providing a more accurate cooling effect.

[0064] Simplify system integration and reduce complexity. Directly couple the cooling system to the rotor 3, simplify the control and integration of the cooling system, and do not require additional sensors and control modules to start and adjust the cooling system separately. The synchronous operation design may reduce the number of independent components and reduce the complexity of maintenance and fault diagnosis.

[0065] The cooling system and the rotor 3 operate synchronously, ensuring that the cooling system works properly every time the motor is running, reducing the risk of overheating due to delayed startup or failure of the cooling system;

[0066] Integrated designs are generally more compact and reliable, reducing external connections and possible leak points;

[0067] With load dependence of cooling system, the cooling system will automatically weaken at low load or idling, thus saving energy and improving the energy efficiency of the overall system;

[0068] The centrifugal fan 7 and the centrifugal pump 8 only work when needed, avoiding the operation of the cooling system when it is not necessary, further saving energy;

[0069] Better dynamic response can be achieved, because the operation of the cooling system is directly related to the rotational speed of the rotor 3, the cooling capacity can quickly respond to changes in the operating state of the motor, providing more stable and consistent temperature control.

[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A self-heating motor, characterized in that: The heat dissipation support comprises a heat dissipation support (1), wherein a plurality of heat dissipation air ducts (14), a first circulating oil duct (16) and a second circulating oil duct (18) are provided in the heat dissipation support (1), wherein the heat dissipation air duct (14) passes through the top and side wall of the heat dissipation support (1), wherein the first circulating oil duct (16) is arranged adjacent to the heat dissipation air duct (14), wherein the side wall of the heat dissipation support (1) is provided with an oil inlet (17), wherein the oil inlet (17) is in communication with the first circulating oil duct (16), wherein the second circulating oil duct (18) is in communication with the bottom of the heat dissipation support (1), wherein the first circulating oil duct (16) is in communication with the second circulating oil duct (18), wherein the heat dissipation support (1) is provided with an oil outlet (19), wherein the oil outlet (19) is in communication with the second circulating oil duct (18); The heat dissipation support (1) comprises a first cylindrical frame (11) and a second cylindrical frame (12); the outer diameter of the first cylindrical frame (11) is smaller than the outer diameter of the second cylindrical frame (12); the first cylindrical frame (11) and the second cylindrical frame (12) are integrally formed and coaxially arranged; The self-heating motor further comprises a stator (2) and a rotor (3); a sealing shell (5) is mounted on the first cylindrical frame (11); the first cylindrical frame (11), the second cylindrical frame (12) and the sealing shell (5) form a sealed space; the stator (2) is sleeved on the first cylindrical frame (11) and is located in the sealed space; the sealed space is communicated with the oil inlet (17) and the oil outlet (19); the rotor (3) is sleeved on the sealing shell (5); the rotor (3) is coaxially connected with a centrifugal fan (7); the ventilation cavity of the centrifugal fan (7) is communicated with the heat dissipation duct (14); the first cylindrical frame (11) and the second cylindrical frame (12) are jointly provided with an installation channel (13); a centrifugal pump (8) is installed in the installation channel (13); The second circulating oil passage (18) comprises an oil pump mounting groove (184), the oil outlet and oil inlet of the centrifugal pump (8) are located in the oil pump mounting groove (184), and the centrifugal pump (8) is coaxially connected to the centrifugal fan (7).

2. The self-heating motor according to claim 1, characterized in that: The heat dissipation duct (14) is opened along the height direction of the first cylindrical frame (11) and the radial direction of the second cylindrical frame (12); one end of the heat dissipation duct (14) passes through the top surface of the first cylindrical frame (11), and the other end of the heat dissipation duct (14) passes through the side wall of the second cylindrical frame (12); a plurality of the heat dissipation ducts (14) are arranged equidistantly around the central axis of the first cylindrical frame (11).

3. The self-heating motor according to claim 2, characterized in that: The first circulating oil channel (16) is a spiral channel. The first circulating oil channel (16) is located between the heat dissipation air channel (14) and the outer wall of the first cylindrical frame (11). The first circulating oil channel (16) is arranged around a plurality of the heat dissipation air channels (14). The oil inlet (17) is opened on the side wall of the first cylindrical frame (11). The second circulating oil passage (18) is opened in the second cylindrical frame (12), and the oil outlet (19) is opened on the top surface of the second cylindrical frame (12).

4. The self-heating motor according to claim 2, characterized in that: A plurality of fins (15) are arranged in each of the heat dissipation air ducts (14); the fins (15) are L-shaped and matched with the heat dissipation air duct (14); the plurality of fins (15) divide the heat dissipation air duct (14) into a plurality of independent ventilation ducts.

5. The self-heating motor according to claim 2, characterized in that: The installation channel (13) is coaxial with the first cylindrical frame (11) and the second cylindrical frame (12), and the installation channel (13) passes through the top surface of the first cylindrical frame (11) and the bottom surface of the second cylindrical frame (12).

6. The self-heating motor according to claim 5, characterized in that: The second circulating oil passage (18) further comprises a first arcuate flow passage (181), a second arcuate flow passage (182) and a third arcuate flow passage (183); the oil pump mounting groove (184) is located at the center of the second cylindrical frame (12); the first arcuate flow passage (181) is located between the second arcuate flow passage (182) and the third arcuate flow passage (183); the second arcuate flow passage (182) is located between the oil pump mounting groove (184) and the first arcuate flow passage (183); The first arc-shaped flow channel (181) is connected to the second arc-shaped flow channel (182), the oil pump installation groove (184) is connected to the second arc-shaped flow channel (182) and the third arc-shaped flow channel (183), the first arc-shaped flow channel (181) is connected to the first circulating oil channel (16), the third arc-shaped flow channel (183) is connected to the oil outlet (19), and the oil pump installation groove (184) is connected to the installation channel (13).

7. The self-heating motor according to claim 6, characterized in that: A floating piston (110) is disposed in the third arc-shaped flow channel (183).

8. The self-heating motor according to claim 1, characterized in that: The centrifugal fan (7) is connected to a first rotating shaft (71), a bearing (72) is arranged on the first rotating shaft (71), the first rotating shaft (71) is connected to a connecting plate (82), the connecting plate (82) is connected to a second rotating shaft (81), the second rotating shaft (81) is connected to the centrifugal pump (8), and the bearing (72), the first rotating shaft (71), the connecting plate (82) and the second rotating shaft (81) are all located in the installation channel (13).

9. The self-heating motor according to claim 6, characterized in that: A controller (4) is installed at the bottom of the second cylindrical frame (12), and a plurality of silicon carbide control modules (41) are arranged on the inner top wall of the controller (4), and the plurality of silicon carbide control modules (41) are directly opposite to the third arc-shaped flow channel (183).

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