A new energy vehicle motor based on a polyphase winding and a use method thereof

Abstract

The application relates to the technical field of workpiece internal defect detection, in particular to a new energy automobile motor based on a multi-phase winding and a use method thereof, which comprises a multi-phase winding motor body, an output shaft and a mounting cylinder, the middle part of the multi-phase winding motor body is rotationally connected with the output shaft, the surface of the output shaft is fixedly provided with a transmission assembly, one end of the multi-phase winding motor body is fixedly provided with a liquid cooling assembly, the other end of the multi-phase winding motor body is fixedly provided with the mounting cylinder, the inner wall of the mounting cylinder is fixedly provided with an air cooling assembly on one side, and the inner wall of the mounting cylinder is fixedly provided with an oil cooling assembly in the middle part; the magnetic field of the connecting disc transmits torque to drive the connecting disc to rotate; the connecting disc accelerates the flow of the cooling liquid through the plurality of blades; the plurality of cooling pipes are used for absorbing the heat emitted from the surface of the multi-phase winding motor body; since the output shaft and the connecting disc are contactless transmission, the heat generated due to mechanical friction is reduced, and the operation burden of the multi-phase winding motor body is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, specifically to a new energy vehicle motor based on multiphase windings and its usage method. Background Technology

[0002] With the increasing global energy shortage and environmental problems, new energy vehicles are receiving more and more attention due to their clean and efficient energy use. In the power system of these new vehicles, the motor is the core component, and its performance plays a decisive role in the power output, energy efficiency and driving experience of the whole vehicle. Every innovation and optimization of the motor has brought the possibility of improving the overall performance and user experience of new energy vehicles.

[0003] In the core structure of drive motors for new energy vehicles, the stator, as a key component for electromagnetic energy conversion, directly affects the overall performance of the motor. The multiphase winding, as a direct participant in the energy conversion of the motor, achieves precise control of the magnetic field through carefully designed phase band angles and pitches. The optimization of the phase band angle is like laying smooth and unobstructed "high-speed channels" for the magnetic field, reducing the generation of harmonic magnetic fields, making the motor run more smoothly, and reducing vibration and noise. The precise calculation and adjustment of the pitch further improves the utilization rate of the winding, making the current distribution in the winding more uniform, and improving the efficiency and power density of the motor.

[0004] However, in order to save space, multiphase winding motors drive fan blades to rotate through a drive shaft to achieve heat dissipation during operation. However, this cooling method has significant limitations. Specifically, the fan blades increase the load on the motor due to their own rotation. As the motor continues to run for a long time, this inefficient heat dissipation mechanism gradually reveals its inadequacy and cannot fully meet the heat dissipation needs of the core components and casing inside the motor, leading to frequent local overheating and affecting the overall performance and service life of the motor.

[0005] Therefore, this paper proposes a new energy vehicle motor based on multiphase windings and its application method to address the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a new energy vehicle motor based on multiphase windings and its usage method, in order to solve the problem in the background art that heat dissipation is achieved by driving the fan blades to rotate through the transmission shaft. However, the fan blades themselves increase the load burden on the motor due to their rotation, making it difficult to fully meet the heat dissipation requirements of the core components and the casing inside the motor, thereby affecting the overall performance and service life of the motor.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A new energy vehicle motor based on multiphase windings and its usage method are disclosed. The motor includes a multiphase winding motor body, an output shaft, and a mounting cylinder. The output shaft is rotatably connected to the middle of the multiphase winding motor body. A transmission assembly is fixedly mounted on the surface of the output shaft. A liquid cooling assembly is fixedly mounted at one end of the multiphase winding motor body, and a mounting cylinder is fixedly mounted at the other end. An air-cooling assembly is fixedly mounted on one side of the inner wall of the mounting cylinder, and an oil-cooling assembly is fixedly mounted in the middle of the inner wall of the mounting cylinder. The transmission assembly includes a connecting plate, and the surface of the connecting plate has... There is a first mounting slot, and several mounting slots are provided. A magnetic block is provided inside the first mounting slot. The liquid cooling assembly includes a sealed box. A water outlet groove is opened on one side of the sealed box, and several water outlet grooves are provided. A support plate is rotatably connected inside the sealed box. A blade is provided on the surface of the support plate, and several blades are provided. A second mounting slot is opened on the inner wall of the support plate, and several second mounting slots are provided. A magnetic block is provided inside the second mounting slot. A cooling pipe is provided at one end of the water outlet groove, and a liquid storage assembly is provided at one end of several cooling pipes.

[0009] As a further optimization of the present invention, the surface of the cooling pipe is fixedly connected to the multiphase winding motor body, and the outer surface of the multiphase winding motor body is provided with a mounting groove three that matches the cooling pipe.

[0010] As a further optimization of the present invention, a heat dissipation pipe is provided on one side of the surface of the sealing box, a heat dissipation fin is provided on the surface of the heat dissipation pipe, and a mounting base is provided on the other side of the surface of the sealing box.

[0011] As a further optimization of the present invention, the liquid storage assembly includes a liquid storage tank, which is disposed at one end inside the mounting cylinder. One side of the mounting cylinder is fixedly connected to a plurality of cooling pipes. The other side of the liquid storage tank is provided with a heat dissipation plate. The surface of the heat dissipation plate is provided with heat fins II. There are a plurality of heat fins II, and the plurality of heat fins II are arranged in a cross pattern. The surface of the heat fins II is provided with ventilation grooves.

[0012] As a further optimization of the present invention, a reflux pipe is provided between the bottom end of the sealing box and the bottom end of the liquid storage tank, and a one-way valve is provided on one side of the reflux pipe.

[0013] As a further optimization of the present invention, the air-cooling component includes a fixing rod, a small motor is mounted on the middle of the fixing rod via a motor mount, the drive shaft of the small motor is provided with fan blades, and the surface of the mounting cylinder is provided with heat dissipation holes, and a plurality of heat dissipation holes are provided.

[0014] As a further optimization of the present invention, one end of the mounting cylinder is threadedly connected to a protective frame, the interior of the protective frame is provided with a protective rod, and the surface of the protective frame is provided with anti-slip texture.

[0015] As a further optimization of the present invention, the oil cooling assembly includes two support rods, an oil storage pan is provided between the two support rods, and the oil storage pan is located in front of the second hot fin. An oil inlet pipe is provided at the top of one side of the oil storage pan, one end of the oil inlet pipe passes through the top of the inner wall of the multiphase winding motor body, an oil outlet pipe is provided at the bottom of one side of the oil storage pan, one end of the oil outlet pipe passes through the bottom of the inner wall of the multiphase winding motor body, and a small infusion pump is provided on one side of the middle of the oil outlet pipe.

[0016] As a further optimization of the present invention, wherein: a second mounting seat is provided on one side of the surface of the mounting cylinder, and a plurality of second mounting seats are provided, and a fixing plate is provided between every two adjacent second mounting seats.

[0017] As a further optimization of the present invention, wherein: S1: Firstly, a suitable amount of coolant is filled inside the sealed box, the sealed box is connected to several cooling pipes, and the coolant can flow into several cooling pipes through the water outlet, and absorb the heat emitted from the surface of the multiphase winding motor body through several cooling pipes, thereby achieving the external cooling effect of the multiphase winding motor body.

[0018] S2: The output shaft drives the connecting plate to rotate synchronously. Several magnetic blocks are set on the surface of the connecting plate through the first mounting groove. The magnetic blocks are arranged in a ring with the N pole and the S pole in sequence. At the same time, several magnetic blocks are set on the inner wall of the support plate through the second mounting groove. The magnetic blocks are arranged in a ring with the S pole and the N pole in sequence. The magnetic blocks are magnetically connected to the corresponding magnetic blocks. The output shaft drives the connecting plate to rotate by transmitting torque through the magnetic field. The connecting plate accelerates the flow of coolant into the storage tank for cooling circulation through several blades. The cooled coolant will flow into the sealed box through the return pipe under the action of water pressure for cooling circulation.

[0019] S3: The oil reservoir is filled with an appropriate amount of cooling oil. A small infusion pump provides power for the delivery of cooling oil. Since the cooling oil is non-conductive and non-magnetic, the cooling oil enters the interior of the multiphase winding motor body through the oil inlet pipe to cool the rotor. Then, it flows into the oil reservoir through the oil outlet pipe to cool the multiphase winding motor body, thus achieving a cooling cycle.

[0020] S4: The transmission shaft of a small motor drives the fan blades to generate airflow. The airflow blows onto the surface of the oil reservoir and the surface of the second hot fin, thereby cooling the liquid tank and the oil reservoir. Several ventilation slots help improve the airflow between the second hot fin, and the heat dissipation holes on the surface of the mounting cylinder facilitate the dissipation of heat.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In this invention, the liquid cooling component is set up to drive the connecting plate to rotate by transmitting torque through the magnetic field of the connecting plate. The connecting plate accelerates the flow of coolant through several blades. The sealing box is connected to several cooling pipes. The cooling pipes absorb the heat emitted from the surface of the multiphase winding motor body, thereby achieving an external cooling effect on the multiphase winding motor body. The cooling effect is better. Since the output shaft and the connecting plate are non-contact transmissions, the heat generated by mechanical friction is reduced, which greatly reduces the operating burden of the multiphase winding motor body and extends the service life of the motor.

[0023] 2. In this invention, the oil cooling component is designed to provide power for the delivery of cooling oil using a small infusion pump. Since the cooling oil is non-conductive and non-magnetic, it can efficiently cool the high-speed rotating rotor. This process not only effectively suppresses the internal temperature rise of the motor, but also ensures the stability and safety of the multiphase winding motor body. Through the cooperation of the oil cooling component and the liquid cooling component, the overall heat dissipation efficiency of the multiphase winding motor body is greatly improved, ensuring the continuous stability of the motor under long-term, high-load operation.

[0024] 3. In this invention, the air-cooling component is set up to drive the fan blades to generate airflow through the transmission shaft of a small motor. The airflow blows onto the surface of the oil storage pan and the surface of the second hot fin, which can cool the liquid storage tank and the oil storage pan at the same time. This design not only significantly reduces operating costs, but also improves cooling efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a side view of the present invention;

[0027] Figure 3 This is a schematic diagram of the exploded structure of the present invention;

[0028] Figure 4 This is a cross-sectional structural diagram of the sealing box of the present invention;

[0029] Figure 5 This is a schematic diagram of the transmission component of the present invention;

[0030] Figure 6 This is an exploded structural diagram of the sealed box of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the support disk of the present invention;

[0032] Figure 8This is a schematic diagram of the exploded structure of the liquid storage component of the present invention;

[0033] Figure 9 This is a schematic diagram of the structure of the oil cooling assembly of the present invention.

[0034] In the diagram: 1. Multiphase winding motor body; 2. Output shaft; 3. Transmission assembly; 31. Connecting plate; 32. Mounting slot one; 33. Magnetic block one; 4. Liquid cooling assembly; 41. Sealing box; 411. Heat sink pipe; 412. Heat sink fin one; 42. Water outlet; 421. Cooling pipe; 4211. Mounting slot three; 422. Liquid storage assembly; 4221. Liquid storage tank; 4222. Heat sink plate; 4223. Heat sink fin two; 4224. Ventilation slot; 4225. Return pipe; 42 26. Check valve; 43. Support plate; 44. Blade; 45. Mounting slot two; 46. Magnetic block two; 47. Mounting base one; 5. Mounting cylinder; 51. Air-cooled assembly; 511. Fixing rod; 512. Small motor; 513. Fan blade; 514. Heat dissipation hole; 515. Protective frame; 516. Protective rod; 52. Mounting base two; 53. Fixing plate; 6. Oil-cooled assembly; 61. Support rod; 62. Oil reservoir; 63. Oil inlet pipe; 64. Oil outlet pipe; 65. Small infusion pump. Detailed Implementation

[0035] Please see Figure 1-9 The present invention provides a technical solution:

[0036] A new energy vehicle motor based on multiphase windings and its usage method include a multiphase winding motor body 1, an output shaft 2, and a mounting cylinder 5. The output shaft 2 is rotatably connected to the middle of the multiphase winding motor body 1. A transmission assembly 3 is fixedly mounted on the surface of the output shaft 2. A liquid cooling assembly 4 is fixedly mounted on one end of the multiphase winding motor body 1, and a mounting cylinder 5 is fixedly mounted on the other end of the multiphase winding motor body 1. An air cooling assembly 51 is fixedly mounted on one side of the inner wall of the mounting cylinder 5, and an oil cooling assembly 6 is fixedly mounted in the middle of the inner wall of the mounting cylinder 5. The transmission assembly 3 includes a connecting plate 31, and a mounting groove 32 is formed on the surface of the connecting plate 31. The first mounting slot 32 has several of these slots, and the interior of the first mounting slot 32 is equipped with a magnetic block 33. The liquid cooling assembly 4 includes a sealed box 41, one side of which has a water outlet slot 42, and several water outlet slots 42 are provided. The interior of the sealed box 41 is rotatably connected to a support plate 43, the surface of which is provided with blades 44, and several blades 44 are provided. The inner wall of the support plate 43 has a second mounting slot 45, and several second mounting slots 45 are provided. The interior of the second mounting slot 45 is equipped with a magnetic block 46. One end of the water outlet slot 42 is equipped with a cooling pipe 421, and one end of each cooling pipe 421 is equipped with a liquid storage assembly 422.

[0037] As a further implementation of this solution, the surface of the cooling pipe 421 is fixedly connected to the multiphase winding motor body 1, and the outer surface of the multiphase winding motor body 1 is provided with a mounting groove 4211 that matches the cooling pipe 421.

[0038] As a further implementation of this solution, a heat dissipation pipe 411 is provided on one side of the surface of the sealing box 41, and heat dissipation fins 412 are provided on the surface of the heat dissipation pipe 411. A mounting base 47 is provided on the other side of the surface of the sealing box 41.

[0039] As a further implementation of this solution, the liquid storage assembly 422 includes a liquid storage tank 4221. The liquid storage tank 4221 is located at one end inside the mounting cylinder 5. One side of the mounting cylinder 5 is fixedly connected to several cooling pipes 421. The other side of the liquid storage tank 4221 is provided with a heat dissipation plate 4222. The surface of the heat dissipation plate 4222 is provided with several heat fins 4223, and the several heat fins 4223 are arranged in a cross pattern. The surface of the heat fins 4223 is provided with ventilation slots 4224.

[0040] As a further implementation of this solution, a reflux pipe 4225 is provided between the bottom end of the sealing box 41 and the bottom end of the liquid storage tank 4221, and a one-way valve 4226 is provided on one side of the reflux pipe 4225.

[0041] As a further implementation of this solution, the air-cooled component 51 includes a fixing rod 511. A small motor 512 is mounted on the middle of the fixing rod 511 via a motor mount. The drive shaft of the small motor 512 is equipped with a fan blade 513. The surface of the mounting cylinder 5 is provided with heat dissipation holes 514, and several heat dissipation holes 514 are provided.

[0042] As a further implementation of this solution, a protective frame 515 is threaded to one end of the mounting cylinder 5. The protective frame 515 has a protective rod 516 inside and anti-slip texture is provided on the surface of the protective frame 515.

[0043] As a further implementation of this solution, the oil cooling assembly 6 includes two support rods 61, with an oil storage pan 62 between the two support rods 61. The oil storage pan 62 is located in front of the second heat fin 4223. An oil inlet pipe 63 is provided at the top of one side of the oil storage pan 62, with one end of the oil inlet pipe 63 penetrating through the top of the inner wall of the multiphase winding motor body 1. An oil outlet pipe 64 is provided at the bottom of one side of the oil storage pan 62, with one end of the oil outlet pipe 64 penetrating through the bottom of the inner wall of the multiphase winding motor body 1. A small infusion pump 65 is provided on one side of the middle of the oil outlet pipe 64.

[0044] As a further implementation of this scheme, a mounting base 52 is provided on one side of the surface of the mounting cylinder 5, and several mounting bases 52 are provided, with a fixing plate 53 between every two adjacent mounting bases 52.

[0045] S1: First, according to the following: The sealed box 41 is filled with an appropriate amount of coolant. The sealed box 41 is connected to several cooling pipes 421. The coolant can flow into several cooling pipes 421 through the water outlet 42. The cooling pipes 421 absorb the heat emitted from the surface of the multiphase winding motor body 1, thereby achieving the external cooling effect of the multiphase winding motor body 1.

[0046] S2: Due to the gap between the inner wall of the connecting plate 31 and the sealing box 41, and the fact that the sealing box 41 is made of insulating plastic, the output shaft 2 drives the connecting plate 31 to rotate synchronously. Several magnetic blocks 33 are set on the surface of the connecting plate 31 through the mounting groove 32, and the magnetic blocks 33 are arranged in a ring with the N pole and the S pole in sequence. At the same time, several magnetic blocks 46 are set on the inner wall of the support plate 43 through the mounting groove 45, and the magnetic blocks 46 are arranged in a ring with the S pole and the N pole in sequence. The magnetic blocks 46 are magnetically connected to the corresponding magnetic blocks 33. The output shaft 2 drives the connecting plate 31 to rotate by transmitting torque through the magnetic field. The connecting plate 31 accelerates the flow of coolant into the storage tank 4221 for cooling circulation through several blades 44. The cooled coolant will flow into the sealing box 41 through the return pipe 4225 under the action of water pressure for cooling circulation.

[0047] S3: The oil storage pan 62 is filled with an appropriate amount of cooling oil. The small infusion pump 65 provides power for the delivery of cooling oil. Since the cooling oil is non-conductive and non-magnetic, the cooling oil enters the interior of the multiphase winding motor body 1 through the oil inlet pipe 63 to cool the rotor. Then, it flows into the oil storage pan 62 through the oil outlet pipe 64 to cool down, thus achieving a cooling cycle for the multiphase winding motor body 1.

[0048] S4: The transmission shaft of the small motor 512 drives the fan blade 513 to generate airflow. The airflow blows onto the surface of the oil storage pan 62 and the surface of the second heat fin 4223, thereby cooling the liquid storage tank 4221 and the oil storage pan 62. Several ventilation slots 4224 help improve the airflow between the second heat fin 4223. The heat dissipation holes 514 on the surface of the mounting cylinder 5 facilitate the dissipation of heat.

[0049] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A new energy vehicle motor based on multiphase windings, comprising a multiphase winding motor body (1), an output shaft (2), and a mounting sleeve (5), characterized in that: The multiphase winding motor body (1) is rotatably connected to an output shaft (2) in the middle. A transmission assembly (3) is fixedly provided on the surface of the output shaft (2). A liquid cooling assembly (4) is fixedly provided at one end of the multiphase winding motor body (1). An installation cylinder (5) is fixedly provided at the other end of the multiphase winding motor body (1). An air cooling assembly (51) is fixedly provided on one side of the inner wall of the installation cylinder (5). An oil cooling assembly (6) is fixedly provided in the middle of the inner wall of the installation cylinder (5). The transmission assembly (3) includes a connecting plate (31), and the surface of the connecting plate (31) is provided with a mounting groove (32), and there are several mounting grooves (32). The interior of the mounting groove (32) is provided with a magnetic block (33). The liquid cooling assembly (4) includes a sealed box (41), a water outlet groove (42) is provided on one side of the sealed box (41), and there are several water outlet grooves (42). A support plate (43) is rotatably connected inside the sealed box (41). The surface of the support plate (43) is provided with blades (44), and there are several blades (44). The inner wall of the support plate (43) is provided with a second mounting groove (45), and there are several second mounting grooves (45). The interior of the second mounting groove (45) is provided with a second magnetic block (46). One end of the water outlet groove (42) is provided with a cooling pipe (421). One end of several cooling pipes (421) is provided with a liquid storage assembly (422). The surface of the cooling pipe (421) is fixedly connected to the multiphase winding motor body (1). The outer surface of the multiphase winding motor body (1) is provided with a third mounting groove (4211) that matches the cooling pipe (421). The liquid storage assembly (422) includes a liquid storage tank (4221), which is located at one end inside the mounting cylinder (5). One side of the mounting cylinder (5) is fixedly connected to several cooling pipes (421). The other side of the liquid storage tank (4221) is provided with a heat dissipation plate (4222). The surface of the heat dissipation plate (4222) is provided with heat fins (4223). Several heat fins (4223) are provided and are arranged in a cross pattern. Ventilation slots (4224) are opened on the surface of the heat fins (4223). The oil cooling assembly (6) includes two support rods (61), with an oil storage pan (62) between the two support rods (61) and the oil storage pan (62) located in front of the second hot fin (4223). An oil inlet pipe (63) is provided at the top of one side of the oil storage pan (62), with one end of the oil inlet pipe (63) penetrating the top of the inner wall of the multiphase winding motor body (1). An oil outlet pipe (64) is provided at the bottom of one side of the oil storage pan (62), with one end of the oil outlet pipe (64) penetrating the bottom of the inner wall of the multiphase winding motor body (1). A small infusion pump (65) is provided on one side of the middle of the oil outlet pipe (64).

2. A new energy vehicle motor based on multiphase windings according to claim 1, characterized in that: A heat dissipation pipe (411) is provided on one side of the surface of the sealing box (41), and a heat dissipation fin (412) is provided on the surface of the heat dissipation pipe (411). A mounting base (47) is provided on the other side of the surface of the sealing box (41).

3. A new energy vehicle motor based on multiphase windings according to claim 2, characterized in that: A reflux pipe (4225) is provided between the bottom end of the sealing box (41) and the bottom end of the liquid storage tank (4221), and a one-way valve (4226) is provided on one side of the reflux pipe (4225).

4. A new energy vehicle motor based on multiphase windings according to claim 3, characterized in that: The air-cooled assembly (51) includes a fixing rod (511), a small motor (512) is mounted on the middle of the fixing rod (511) via a motor mount, the drive shaft of the small motor (512) is provided with fan blades (513), and the surface of the mounting cylinder (5) is provided with heat dissipation holes (514), and there are several heat dissipation holes (514).

5. A new energy vehicle motor based on multiphase windings according to claim 4, characterized in that: One end of the mounting cylinder (5) is threadedly connected to a protective frame (515), and a protective rod (516) is provided inside the protective frame (515). Anti-slip textures are provided on the surface of the protective frame (515).

6. A new energy vehicle motor based on multiphase windings according to claim 5, characterized in that: The mounting cylinder (5) has a mounting base (52) on one side of its surface, and there are several mounting bases (52). A fixing plate (53) is provided between every two adjacent mounting bases (52).

7. A method for using a new energy vehicle motor based on multiphase windings as described in claim 6, characterized in that: Includes the following steps: S1: First, according to the method; an appropriate amount of coolant is filled inside the sealed box (41). The sealed box (41) is connected to several cooling pipes (421). The coolant can flow into several cooling pipes (421) through the water outlet (42). The coolant absorbs the heat emitted from the surface of the multiphase winding motor body (1) through several cooling pipes (421) to achieve the external cooling effect of the multiphase winding motor body (1). S2: The output shaft (2) drives the connecting plate (31) to rotate synchronously. The surface of the connecting plate (31) is provided with several magnetic blocks (33) through the mounting groove (32). The magnetic blocks (33) are arranged in a ring with N pole and S pole in sequence. At the same time, the inner wall of the support plate (43) is provided with several magnetic blocks (46) through the mounting groove (45). The magnetic blocks (46) are arranged in a ring with S pole and N pole in sequence. The magnetic blocks (46) are magnetically connected with the corresponding magnetic blocks (33). The output shaft (2) drives the connecting plate (31) to rotate by transmitting torque through the magnetic field. The connecting plate (31) accelerates the flow of coolant into the storage tank (4221) through several blades (44) for cooling circulation. The cooled coolant will flow into the sealed box (41) through the return pipe (4225) under the action of water pressure for cooling circulation. S3: The oil storage pan (62) is filled with an appropriate amount of cooling oil. The small infusion pump (65) provides power for the delivery of cooling oil. Since the cooling oil is non-conductive and non-magnetic, the cooling oil enters the interior of the multiphase winding motor body (1) through the oil inlet pipe (63) to cool the rotor. It then flows into the oil storage pan (62) through the oil outlet pipe (64) to cool down, thus achieving a cooling cycle for the multiphase winding motor body (1). S4: The transmission shaft of the small motor (512) drives the fan blade (513) to generate airflow. The airflow blows onto the surface of the oil storage pan (62) and the surface of the second hot fin (4223), thereby cooling the liquid storage tank (4221) and the oil storage pan (62). Several ventilation slots (4224) help to improve the airflow between the second hot fin (4223). The heat dissipation holes (514) on the surface of the mounting cylinder (5) facilitate the discharge of heat.

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