A high-efficiency permanent magnet synchronous motor

Abstract

The application discloses a high-efficiency heat-dissipation permanent magnet synchronous motor, relates to the technical field of permanent magnet synchronous motors, and comprises a heat-dissipation device, a stator-rotor device, a junction box and an end cover. The stator-rotor device converts electric energy into mechanical energy. The heat-dissipation device adopts a double-layer circulating heat-dissipation mechanism. Under normal working conditions, internal circulation cooling liquid is adopted to continuously dissipate heat from the motor body. The heat generated by the motor body is taken away through the flow of the cooling liquid in the internal passage of the motor. The cooling liquid cold end is cooled by a fan, the temperature rise in the motor is reduced, and the temperature of the motor is continuously controlled. When the heat in the motor is too large, the heat-absorbing cooling liquid is introduced into an external circulation passage, the heat-absorbing cooling liquid is mixed with the external standby cooling liquid, the temperature of the overall cooling liquid is rapidly reduced, and the internal circulation work is introduced again. The double-layer circulating heat-dissipation mechanism improves the heat exchange capacity of the cooling liquid, improves the heat dissipation efficiency, and prolongs the service life of the motor.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet synchronous motor technology, specifically a high-efficiency heat dissipation permanent magnet synchronous motor. Background Technology

[0002] A permanent magnet synchronous motor is an electric motor that uses permanent magnets to generate a magnetic field. When the stator is energized with alternating current, it generates a rotating magnetic field that drives the permanent magnet rotor to rotate synchronously, thus converting electrical energy into mechanical energy. It has advantages such as high efficiency, small size, and high power, and is widely used in new energy vehicles, industrial servo systems, and wind power generation.

[0003] During operation, permanent magnet synchronous motors generate a large amount of heat due to copper losses in the stator windings, iron losses in the core, and eddy current losses in the rotor. Excessive operating temperature can lead to aging of the winding insulation and shorten the service life of the motor. Existing motor cooling mainly relies on internal fans and heat sinks to remove heat, which has poor cooling effect and low cooling efficiency, thus reducing the stability of motor operation. Summary of the Invention

[0004] The purpose of this invention is to provide a permanent magnet synchronous motor with high-efficiency heat dissipation, so as to solve the problems of poor heat dissipation and low efficiency of existing motors.

[0005] To achieve the above objectives, the present invention provides the following technical solution: including a stator and rotor device, a junction box installed on the stator and rotor device, an end cover installed on one side of the stator and rotor device, and a heat dissipation device installed inside the end cover; power is supplied to the stator and rotor device through the junction box, the stator and rotor device converts electrical energy into mechanical energy, and the heat dissipation device removes the heat generated inside the stator and rotor device, thereby reducing the temperature rise of the stator and rotor device.

[0006] The heat dissipation device includes a liquid storage component and a switching component. The switching component is mounted on the stator and rotor assembly, and a drive component is mounted on one side of the switching component. The drive component provides power for the circulation of the coolant. The switching component switches the internal and external circulation of the coolant according to the temperature of the coolant. The liquid storage component stores the spare coolant and dissipates heat from the spare coolant to keep it at a low temperature.

[0007] The liquid storage assembly includes a liquid storage box, which is mounted on the stator and rotor assembly. A flow-dissipating element is rotatably mounted inside the liquid storage box, and a temperature control ring is installed inside the flow-dissipating element, which is also mounted on the stator and rotor assembly. The liquid storage box is filled with coolant. The flow-dissipating element agitates the coolant inside the box, improving its heat dissipation efficiency. The temperature control ring controls the operating time of the flow-dissipating element, saving kinetic energy generated by the motor.

[0008] The switching assembly includes a switching valve, which is mounted on the stator and rotor unit. A damping element is installed on one side of the switching valve. The switching valve is used to switch the flow direction of the internal and external circulating coolant, and the damping element is used to slow down the switching speed and prevent the switching valve from starting frequently when the coolant temperature exceeds the threshold.

[0009] The stator and rotor assembly includes a main body, within which a water-cooling system is installed. The main body converts the motor into mechanical energy, while the water-cooling system provides channels for the internal circulation of coolant.

[0010] The coolant reservoir includes a reservoir ring mounted on the main body. The reservoir ring has an outlet pipe and an inlet pipe. A retaining ring with a through hole and an arc-shaped groove on its inner side is also installed on one side of the reservoir ring. The reservoir ring is filled with coolant. When the external circulation is activated, the heat-absorbing coolant enters the reservoir ring through the inlet pipe and mixes with the spare coolant already inside. The mixed coolant then flows through the outlet pipe into the water-cooling assembly.

[0011] The flow-dispersing element includes a flow-dispersing ring that rotates on a liquid storage ring. A flow-dispersing plate is mounted on one side of the flow-dispersing ring, located inside the liquid storage ring. A sliding groove is provided on the flow-dispersing ring, and a sliding block is slidably mounted within the groove. A first limiting block is mounted on the sliding block, and a first elastic element is mounted on the first limiting block. One end of the first elastic element is mounted on the flow-dispersing ring. The first elastic element is a first spring. When the switching valve is switched to internal circulation, the sliding block moves towards the temperature control ring until it leaves the through hole. When the temperature control ring is activated simultaneously, it drives the sliding block to rotate, which in turn drives the flow-dispersing ring to rotate. The flow-dispersing ring causes the flow-dispersing plate to rotate inside the liquid storage ring, agitating the spare coolant inside and improving its heat dissipation efficiency. When the switching valve is switched to external circulation, the first spring drives the sliding block to slide away from the temperature control ring, sliding from the arc-shaped groove into the through hole, stopping the flow-dispersing ring from rotating.

[0012] The temperature control ring includes a rotating ring mounted on the main body. A temperature control cylinder is installed inside the rotating ring, and a cylinder is slidably mounted inside the temperature control cylinder. A second limiting block is mounted on one side of the cylinder, and a second elastic element is mounted on the second limiting block. One end of the second elastic element is mounted on the temperature control cylinder. The second elastic element is a second spring. The temperature control cylinder is filled with a thermochromic material. A reducer is installed between the main body and the rotating ring. The main body drives the reducer to rotate, which in turn drives the rotating ring to rotate, preventing excessively fast turbulence. When the temperature of the standby coolant in the reservoir ring exceeds a threshold, heat is transferred to the temperature control cylinder through the rotating ring. The thermochromic material melts and expands due to heat, causing the cylinder to move away from the axis of the rotating ring. When the sliding block leaves the through hole, the cylinder contacts the sliding block, and the cylinder drives the sliding block to rotate.

[0013] The switching valve includes a valve body mounted on a main body. The valve body has an inlet pipe, an inner circulation pipe, and an outer circulation pipe installed on it. The outer circulation pipe and the inlet pipe are connected by a pipeline. A valve stem is slidably mounted inside the valve body, and an inner circulation groove and an outer circulation groove are installed on the valve stem. A temperature sensing bulb is installed on one side of the valve body, and the valve stem slides within the temperature sensing bulb. A push plate is installed on one side of the valve stem, and a fork is mounted on the valve stem. A push block is mounted on the fork. When switching to outer circulation, the valve stem drives the fork to move closer to the sliding block, and the fork drives the push block to move closer to the sliding block. The temperature sensing bulb is filled with a thermochromic material. In the initial state, the inner circulation groove of the valve stem is connected to the inlet pipe. During inner circulation, the coolant in the water-cooling assembly enters the inlet pipe from the drive assembly, enters the inner circulation pipe through the inner circulation groove, and returns to the water-cooling assembly from the inner circulation pipe.

[0014] When the temperature sensor detects that the coolant temperature inside the valve body exceeds the threshold, the thermo-degradable material inside the temperature sensor expands due to heat, causing the valve stem to move away from the temperature sensor. The external circulation groove on the valve stem is connected to the inlet pipe. During external circulation, the coolant in the water-cooling assembly enters the inlet pipe from the drive assembly, enters the external circulation pipe through the external circulation groove, enters the liquid storage ring from the external circulation pipe, and returns to the water-cooling assembly from the liquid storage ring.

[0015] The damping element includes a damping box, which is mounted on the main body. A storage box is mounted on one side of the damping box. A connecting pipe and a damping pipe are installed between the damping box and the storage box. A one-way valve is installed inside the connecting pipe. A pusher plate is mounted on one side of the valve stem. A third elastic element is mounted on the pusher plate. One end of the third elastic element is mounted on the damping box.

[0016] The damping box is filled with damping oil, and the third elastic element is a third spring. When the valve stem moves away from the temperature sensing bulb, the one-way valve opens, and the valve stem drives the pusher plate to move away from the temperature sensing bulb. The pusher plate pushes the damping oil in the damping box into the storage box through the connecting pipe, which facilitates a quick switch from internal circulation to external circulation. When the temperature sensing bulb detects that the coolant temperature in the valve body is lower than the threshold, the thermo-deformable material in the temperature sensing bulb cools and shrinks. The third spring drives the valve stem to move closer to the temperature sensing bulb, at which point the one-way valve closes, and the damping oil in the storage box slowly returns to the damping box from the damping tube, increasing the number of external circulation cycles. This ensures that the heat-absorbing coolant in the external circulation and the spare coolant in the reservoir ring are completely mixed, preventing the temperature sensing bulb from immediately switching back to internal circulation when it detects a drop in the coolant temperature in the valve body. This also prevents some heat-absorbing coolant from entering the internal circulation without heat exchange, which would cause the valve stem to move frequently.

[0017] The drive assembly includes a mounting plate mounted on the main body. A pump body is mounted on one side of the mounting plate, and an inlet and outlet pipe are installed on the pump body, connected by a conduit. A coupling is mounted on the other side of the mounting plate, with one side of the coupling mounted on the input shaft of the pump body and the other side mounted on a drive shaft. A buffer groove and a limiting groove are mounted on the coupling. A centrifugal block is slidably mounted inside the drive shaft, and a third limiting block is mounted on the centrifugal block. A fourth elastic element, a fourth spring, is mounted at one end inside the drive shaft. A drive belt is mounted on the outside of the drive shaft and rotor assembly.

[0018] When the main body rotates, it drives the transmission belt to rotate, which in turn drives the transmission shaft to rotate. The transmission shaft then drives the centrifugal block to slide away from the axis of the transmission shaft, preventing the pump body from starting when the motor starts and reducing the load on the motor during startup. When the speed of the transmission shaft reaches a certain threshold, the centrifugal block enters the limiting groove through the buffer groove. The centrifugal block drives the coupling ring to rotate, which in turn drives the input shaft of the pump body to rotate. This causes the pump body to pump the coolant in the water-cooled components from the inlet pipe to the outlet pipe, providing power for the circulation of the coolant.

[0019] The main body includes a housing, a junction box mounted on the housing, heat sinks mounted on the outside of the housing, a stator assembly mounted inside the housing, a rotor assembly rotatably mounted inside the stator assembly, and an axial fan mounted on one side of the rotor assembly. When powered on, the rotor assembly drives the rotating ring, transmission belt, and axial fan to rotate, and the axial fan dissipates heat from the liquid reservoir ring and heat pipes.

[0020] The water-cooling assembly includes a spiral tube installed inside the housing. An outflow pipe is installed on one side of the spiral tube, connected to the pump inlet pipe via a conduit. An inflow pipe is installed on the other side of the spiral tube, with a heat dissipation pipe installed on one side of the inflow pipe. An internal circulation pipe is connected to the heat dissipation pipe via a conduit, and an outlet pipe is connected to the inflow pipe via a conduit. The spiral tube is filled with coolant. During internal circulation, the coolant in the spiral tube absorbs heat generated by the main body and enters the pump body through the outflow pipe. The pump body pumps the coolant into a switching valve, from which it enters the heat dissipation pipe, and then returns to the spiral tube through the inflow pipe. During external circulation, the heat-absorbing coolant in the spiral tube enters the pump body through the outflow pipe. The pump body pumps the coolant into a switching valve, from which it enters a reservoir ring, from which it enters the inflow pipe, and then returns to the spiral tube through the inflow pipe.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: A dual-layer circulating heat dissipation mechanism is adopted. Under normal operating conditions, the internal circulating coolant continuously dissipates heat from the motor body. The heat generated by the motor body is carried away by the flow of coolant in the internal channels of the motor. A fan then dissipates heat from the cold end of the coolant, reducing the internal temperature rise of the motor and achieving continuous temperature control. When the heat inside the motor becomes excessive, the heat-absorbing coolant is introduced into the external circulating channel, mixing with the external backup coolant to quickly reduce the overall coolant temperature before being reintroduced into the internal circulation. This dual-layer circulating heat dissipation mechanism enhances the heat exchange capacity of the coolant, strengthens the overall thermal management capability of the motor, reduces the risk of localized overheating, improves heat dissipation efficiency, and extends the service life of the motor. Attached Figure Description

[0022] Figure 1 This is a perspective view of the permanent magnet synchronous motor of the present invention; Figure 2 This is a schematic diagram of the internal structure of the permanent magnet synchronous motor of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the internal structure of the permanent magnet synchronous motor of the present invention. Figure 2 ; Figure 4 This is a perspective view of the heat dissipation device of the present invention; Figure 5 Explosion of the liquid storage assembly of the present invention Figure 1 ; Figure 6 Explosion of the liquid storage assembly of the present invention Figure 2 ; Figure 7 This is an exploded view of the switching valve of the present invention; Figure 8 This is a perspective view of the damping element of the present invention; Figure 9 This is a cross-sectional view of the stator and rotor device of the present invention; Figure 10 This is a perspective view of the driving component of the present invention.

[0023] In the diagram: 1. Heat dissipation device; 11. Liquid storage assembly; 111. Liquid storage box; 1111. Liquid storage ring; 1112. Liquid outlet pipe; 1113. Liquid inlet pipe; 1114. Fixing ring; 1115. Through hole; 1116. Arc groove; 112. Baffle element; 1121. Baffle ring; 1122. Baffle plate; 1123. Sliding block; 1124. First elastic element; 113. Temperature control ring; 1131. Rotating ring; 1132. Temperature control cylinder; 1133. Cylindrical; 1134. Second elastic element; 12. Switching assembly; 121. Switching valve; 1211. Valve body; 1212. Inlet pipe; 1213. Internal circulation pipe; 1214. External circulation pipe; 1215. Temperature sensor; 1216. Valve stem; 1217. External circulation groove; 1218. 1. Internal circulation tank; 1219. Shift fork; 122. Damping element; 1221. Damping box; 1222. Storage box; 1223. Connecting pipe; 1224. Damping tube; 1225. Push plate; 1226. Third elastic element; 13. Drive assembly; 131. Mounting plate; 132. Pump body; 133. Pump inlet pipe; 134. Pump outlet pipe; 135. Coupling ring; 136. Buffer tank; 137. Limiting groove; 138. Centrifugal block; 139. Drive shaft; 2. Stator and rotor assembly; 21. Main body; 211. Housing; 212. Heat sink; 213. Stator assembly; 214. Rotor assembly; 215. Axial flow fan; 22. Water cooling assembly; 221. Spiral tube; 222. Outlet pipe; 223. Inlet pipe; 3. Junction box; 4. End cover. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1-9 The first embodiment of the present invention shown includes a high-efficiency heat dissipation permanent magnet synchronous motor comprising a stator and rotor assembly 2, a junction box 3 mounted on the stator and rotor assembly 2, an end cover 4 mounted on one side of the stator and rotor assembly 2, and a heat dissipation device 1 installed inside the end cover 4; the stator and rotor assembly 2 is powered through the junction box 3, the stator and rotor assembly 2 converts electrical energy into mechanical energy, and the heat dissipation device 1 removes the heat generated inside the stator and rotor assembly 2, thereby reducing the temperature rise of the stator and rotor assembly 2.

[0026] The heat dissipation device 1 includes a liquid storage component 11 and a switching component 12. The switching component 12 is mounted on the stator and rotor device 2, and a drive component 13 is mounted on one side of the switching component 12. The drive component 13 provides power for the circulation of the coolant. The switching component 12 switches the internal and external circulation of the coolant according to the temperature of the coolant. The liquid storage component 11 stores the spare coolant and dissipates heat from the spare coolant to keep the spare coolant at a low temperature.

[0027] The liquid storage assembly 11 includes a liquid storage box 111, which is mounted on the stator-rotor assembly 2. A flow-dissipating element 112 is rotatably mounted inside the liquid storage box 111, and a temperature control ring 113 is mounted inside the flow-dissipating element 112. The temperature control ring 113 is also mounted on the stator-rotor assembly 2. The liquid storage box 111 is filled with coolant. The flow-dissipating element 112 agitates the coolant inside the liquid storage box 111, improving the heat dissipation efficiency of the coolant. The temperature control ring 113 controls the operating time of the flow-dissipating element 112, saving the kinetic energy generated by the motor.

[0028] The switching assembly 12 includes a switching valve 121, which is mounted on the stator and rotor assembly 2. A damping element 122 is mounted on one side of the switching valve 121. The switching valve 121 is used to switch the flow direction of the internal and external circulating coolant, and the damping element 122 is used to slow down the switching speed and prevent the switching valve 121 from starting frequently when the coolant temperature exceeds the threshold.

[0029] The stator and rotor assembly 2 includes a main body 21, within which a water-cooling component 22 is installed. The main body 21 is used to convert the motor into mechanical energy, and the water-cooling component 22 is used to provide a flow channel for the internal circulation of coolant.

[0030] The liquid storage box 111 includes a liquid storage ring 1111, which is mounted on the main body 21. The liquid storage ring 1111 has an outlet pipe 1112 and an inlet pipe 1113. A fixing ring 1114 is mounted on one side of the liquid storage ring 1111, with a through hole 1115 and an arc-shaped groove 1116 on its inner side. The liquid storage ring 1111 is filled with coolant. When the external circulation is activated, the heat-absorbing coolant enters the liquid storage ring 1111 from the inlet pipe 1113 and mixes with the spare coolant inside the liquid storage ring 1111. The mixed coolant then enters the water-cooling assembly 22 from the outlet pipe 1112.

[0031] The turbulence element 112 includes a turbulence ring 1121 that rotates on a liquid storage ring 1111. A turbulence plate 1122 is installed on one side of the turbulence ring 1121 and is located inside the liquid storage ring 1111. A sliding groove is provided on the turbulence ring 1121, and a sliding block 1123 is slidably installed in the sliding groove. A first limiting block is installed on the sliding block 1123, and a first elastic element 1124 is installed on the first limiting block. One end of the first elastic element 1124 is installed on the turbulence ring 1121. The first elastic element 1124 is the first spring. When the switching valve 121 switches to internal circulation, the sliding block 1123 moves towards the temperature control ring 113 until the sliding block 1123 leaves the through hole 1115. When the temperature control ring 113 is activated at the same time, the temperature control ring 113 drives the sliding block 1123 to rotate. The sliding block 1123 drives the turbulence ring 1121 to rotate. The turbulence ring 1121 drives the turbulence plate 1122 to rotate inside the liquid storage ring 1111. The turbulence plate 1122 disturbs the spare coolant inside the liquid storage ring 1111, improving the heat dissipation efficiency of the spare coolant. When the switching valve 121 switches to external circulation, the first spring drives the sliding block 1123 to slide away from the temperature control ring 113 and slide from the arc groove 1116 into the through hole 1115, causing the turbulence ring 1121 to stop rotating.

[0032] The temperature control ring 113 includes a rotating ring 1131, which is mounted on the main body 21. A temperature control cylinder 1132 is installed inside the rotating ring 1131. A cylinder 1133 is slidably installed inside the temperature control cylinder 1132. A second limiting block is installed on one side of the cylinder 1133. A second elastic element 1134 is installed on the second limiting block. One end of the second elastic element 1134 is installed on the temperature control cylinder 1132. The second elastic element 1134 is a second spring. The temperature control cylinder 1132 is filled with thermochromic material. A reducer is installed between the main body 21 and the rotating ring 1131. The main body 21 drives the reducer to rotate, and the reducer drives the rotating ring 1131 to rotate to prevent the turbulence speed from being too fast. When the temperature of the standby coolant in the liquid storage ring 1111 exceeds the threshold, heat is transferred to the temperature control cylinder 1132 through the rotating ring 1131. The thermochromic material melts and expands in volume due to heat, causing the cylinder 1133 to move away from the axis of the rotating ring 1131. When the sliding block 1123 leaves the through hole 1115, the cylinder 1133 contacts the sliding block 1123, and the cylinder 1133 drives the sliding block 1123 to rotate.

[0033] The switching valve 121 includes a valve body 1211, which is mounted on the main body 21. The valve body 1211 is equipped with an inlet pipe 1212, an inner circulation pipe 1213, and an outer circulation pipe 1214. The outer circulation pipe 1214 and the inlet pipe 1213 are connected by a pipeline. A valve stem 1216 is slidably mounted inside the valve body 1211. An inner circulation groove 1218 and an outer circulation groove 1217 are mounted on the valve stem 1216. A temperature sensing bulb 1215 is mounted on one side of the valve body 1211. The valve stem 1216 slides inside the temperature sensing bulb 1215. A push plate is mounted on one side of the valve stem 1216. A shift fork 1219 is mounted on the valve stem 1216. A push block is mounted on the shift fork 1219. When switching to external circulation, valve stem 1216 drives shift fork 1219 to move closer to sliding block 1123. Shift fork 1219 drives push block to move closer to sliding block 1123. Temperature sensing bulb 1215 is filled with thermochromic material. In the initial state, valve stem 1216 is connected to internal circulation groove 1218 and inlet pipe 1212. During internal circulation, coolant in water-cooled assembly 22 enters inlet pipe 1212 from drive assembly 13, enters internal circulation pipe 1213 through internal circulation groove 1218, and returns to water-cooled assembly 22 from internal circulation pipe 1213.

[0034] When the temperature sensor 1215 senses that the temperature of the coolant in the valve body 1211 exceeds the threshold, the thermo-deformable material in the temperature sensor 1215 expands due to heat, causing the valve stem 1216 to move away from the temperature sensor 1215. The external circulation groove 1217 on the valve stem 1216 is connected to the inlet pipe 1212. During external circulation, the coolant in the water-cooled assembly 22 enters the inlet pipe 1212 from the drive assembly 13, enters the external circulation pipe 1214 through the external circulation groove 1217, enters the liquid storage ring 1111 from the external circulation pipe 1214, and returns to the water-cooled assembly 22 from the liquid storage ring 1111.

[0035] The damping element 122 includes a damping box 1221, which is mounted on the main body 21. A storage box 1222 is mounted on one side of the damping box 1221. A connecting pipe 1223 and a damping pipe 1224 are installed between the damping box 1221 and the storage box 1222. A one-way valve is installed inside the connecting pipe 1223. A pusher plate 1225 is mounted on one side of the valve stem 1216. A third elastic element 1226 is mounted on the pusher plate 1225. One end of the third elastic element 1226 is mounted on the damping box 1221.

[0036] The damping box 1221 is filled with damping oil. The third elastic element 1226 is a third spring. When the valve stem 1216 moves away from the temperature sensor 1215, the one-way valve opens. The valve stem 1216 drives the pusher plate 1225 to move away from the temperature sensor 1215. The pusher plate 1225 pushes the damping oil in the damping box 1221 into the storage box 1222 through the connecting pipe 1223, facilitating a quick switch from internal circulation to external circulation. When the temperature sensor 1215 senses that the coolant temperature in the valve body 1211 is lower than the threshold, the thermal deformation inside the temperature sensor 1215... As the thermal material cools and shrinks, the third spring drives the valve stem 1216 to move closer to the temperature sensor 1215. At this time, the one-way valve closes, and the damping oil in the storage box 1222 slowly returns to the damping box 1221 from the damping tube 1224, increasing the number of external circulation cycles. This ensures that the heat-absorbing coolant in the external circulation and the spare coolant in the liquid storage ring 1111 are completely mixed, preventing the temperature sensor 1215 from immediately switching back to the internal circulation when it senses a decrease in the coolant temperature in the valve body 1211. This also avoids some heat-absorbing coolant entering the internal circulation without heat exchange, which would cause the valve stem 1216 to move frequently.

[0037] The main body 21 includes a housing 211, a junction box 3 mounted on the housing 211, heat sinks 212 mounted on the outside of the housing 211, a stator assembly 213 mounted inside the housing 211, a rotor assembly 214 rotatably mounted inside the stator assembly 213, and an axial fan 215 mounted on one side of the rotor assembly 214. When powered on, the rotor assembly 214 drives the rotating ring 1131, the transmission belt, and the axial fan 215 to rotate, and the axial fan 215 dissipates heat from the liquid storage ring 1111 and the heat sink.

[0038] The water-cooling assembly 22 includes a spiral tube 221, which is installed inside the housing 211. An outlet pipe 222 is installed on one side of the spiral tube 221, and the outlet pipe 222 and the pump inlet pipe 133 are connected by a pipe. An inlet pipe 223 is installed on the other side of the spiral tube 221, and a heat dissipation pipe is installed on one side of the inlet pipe 223. The inner circulation pipe 1213 is connected to the heat dissipation pipe by a pipe. The liquid outlet pipe 1112 and the inlet pipe 223 are connected by a pipe. The spiral tube 221 is filled with coolant. During internal circulation, the coolant in the spiral tube 221 absorbs the heat generated by the main body 21 and enters the pump body 132 through the outlet pipe 222. The pump body 132 pumps the coolant into the switching valve 121, from the switching valve 121 into the heat dissipation pipe, and then back into the spiral tube 221 through the inflow pipe 223. During external circulation, the heat-absorbing coolant in the spiral tube 221 enters the pump body 132 through the outlet pipe 222. The pump body 132 pumps the coolant into the switching valve 121, from the switching valve 121 into the liquid storage ring 1111, from the liquid storage ring 1111 into the inflow pipe 223, and then back into the spiral tube 221 through the inflow pipe 223.

[0039] like Figure 10The second embodiment of the present invention shown provides a drive component 13 that is different from that in the first embodiment. The difference is that the starting method of the drive component 13 is changed in this embodiment. When the motor is just started, the drive component 13 is in a stopped state to prevent the load on the motor during startup and avoid damage to the motor, so that the motor can start smoothly. When the motor is running smoothly, the coolant inside the motor is then driven to circulate and dissipate heat.

[0040] Specifically, the drive assembly 13 includes a mounting plate 131, which is mounted on the main body 21. A pump body 132 is mounted on one side of the mounting plate 131, and an inlet pipe 133 and an outlet pipe 134 are mounted on the pump body 132. The inlet pipe 1212 and the outlet pipe 134 are connected by a pipe. A coupling ring 135 is mounted on the other side of the mounting plate 131. One side of the coupling ring 135 is mounted on the input shaft of the pump body 132, and the other side of the coupling ring 135 is mounted on a drive shaft 139. A buffer groove 136 and a limiting groove 137 are mounted on the coupling ring 135. A centrifugal block 138 is slidably mounted inside the drive shaft 139. A third limiting block is mounted on the centrifugal block 138, and a fourth elastic element is mounted on the third limiting block. One end of the fourth elastic element is mounted inside the drive shaft 139. The fourth elastic element is a fourth spring. A drive belt is mounted on the outside of the drive shaft 139 and the rotor assembly 214.

[0041] When the main body 21 rotates, it drives the transmission belt to rotate, which in turn drives the transmission shaft 139 to rotate. The transmission shaft 139 drives the centrifugal block 138 to slide away from the axis of the transmission shaft 139, so that the motor does not start the pump body 132 when it starts, thus reducing the load when the motor starts. When the speed of the transmission shaft 139 reaches a certain threshold, the centrifugal block 138 enters the limiting groove 137 through the buffer groove 136. The centrifugal block 138 drives the coupling ring 135 to rotate, which in turn drives the input shaft of the pump body 132 to rotate, so that the pump body 132 pumps the coolant in the water-cooled component 22 from the inlet pipe 133 into the outlet pipe 134, providing power for the circulation of the coolant.

[0042] Working principle of the invention: In use, the stator and rotor assembly 2 is powered through the junction box 3. The stator assembly 213 drives the rotating ring 1131, the transmission belt, and the axial fan 215 to rotate. The axial fan 215 dissipates heat from the liquid storage ring 1111 and the heat dissipation pipe. When the stator assembly 213 rotates, the rotor assembly 214 drives the transmission belt to rotate. The transmission belt drives the transmission shaft 139 to rotate. The transmission shaft 139 drives the centrifugal block 138 to slide away from the axis of the transmission shaft 139, so that the pump body 132 is not started when the motor starts, reducing the load when the motor starts. When the speed of the transmission shaft 139 reaches a certain threshold, the centrifugal block 138 enters the limiting groove 137 through the buffer groove 136. The centrifugal block 138 drives the coupling ring 135 to rotate. The coupling ring 135 drives the input shaft of the pump body 132 to rotate, so that the pump body 132 pumps the coolant in the water-cooled component 22 from the inlet pipe 133 into the outlet pipe 134, providing power for the circulation of the coolant.

[0043] In the initial state, the valve stem 1216 is connected to the inner circulation tank 1218 and the inlet pipe 1212. During internal circulation, the coolant in the spiral tube 221 enters the inlet pipe 1212 from the pump body 132, enters the inner circulation pipe 1213 through the inner circulation tank 1218, enters the heat dissipation pipe from the inner circulation pipe 1213, and finally enters the inflow pipe 223 from the heat dissipation pipe and returns to the spiral tube 221 from the inflow pipe 223. The coolant in the internal circulation absorbs the heat generated by the main body 21, reduces the temperature rise of the main body 21, and continuously dissipates heat from the main body 21.

[0044] When the coolant temperature in the internal circulation exceeds a threshold, the temperature sensor 1215 senses that the coolant temperature in the valve body 1211 exceeds the threshold. The thermoplastic material inside the temperature sensor 1215 expands due to heat, causing the valve stem 1216 to move away from the temperature sensor 1215. When the valve stem 1216 moves away from the temperature sensor 1215, the one-way valve opens, and the valve stem 1216 causes the push plate 1225 to move away from the temperature sensor 1215. 5. The damping oil in the damping box 1221 is pressed into the storage box 1222 through the connecting pipe 1223, which facilitates the quick switching from internal circulation to external circulation. The external circulation groove 1217 on the valve stem 1216 is connected to the inlet pipe 1212. The heat-absorbing coolant enters the storage ring 1111 from the inlet pipe 1113 and mixes with the spare coolant in the storage ring 1111. The mixed coolant enters the spiral tube 221 from the outlet pipe 1112, which quickly reduces the temperature of the overall coolant.

[0045] When the temperature sensor 1215 senses that the temperature of the coolant mixed in the valve body 1211 is lower than the threshold, the thermo-degradable material in the temperature sensor 1215 cools and shrinks. The third spring drives the valve stem 1216 to move closer to the temperature sensor 1215. At this time, the one-way valve closes, and the damping oil in the storage box 1222 slowly returns from the damping tube 1224 to the damping box 1221, increasing the number of external circulation cycles. This ensures that the heat-absorbing coolant in the external circulation and the spare coolant in the liquid storage ring 1111 are completely mixed, preventing the temperature sensor 1215 from immediately switching back to the internal circulation when it senses that the coolant temperature in the valve body 1211 has dropped. This avoids some heat-absorbing coolant entering the internal circulation without heat exchange, which would cause the valve stem 1216 to move frequently until the switching valve 121 slowly switches back to the internal circulation.

[0046] When the valve stem 1216 moves away from the temperature sensing bulb 1215, the one-way valve opens. The valve stem 1216 drives the pusher plate 1225 to move away from the temperature sensing bulb 1215. The pusher plate 1225 pushes the damping oil in the damping box 1221 into the storage box 1222 through the connecting pipe 1223, which facilitates a quick switch from internal circulation to external circulation.

[0047] When the switching valve 121 switches to internal circulation, the valve stem 1216 drives the shift fork 1219 to move closer to the sliding block 1123. The shift fork 1219 drives the push block to move closer to the sliding block 1123 until the sliding block 1123 leaves the through hole 1115. When the temperature of the standby coolant in the reservoir ring 1111 exceeds the threshold, heat is transferred to the temperature control cylinder 1132 through the rotating ring 1131. The thermochromic material melts and expands due to heat, causing the cylinder 1133 to move away from the axis of the rotating ring 1131. The rotor assembly 214 moves, driving the reducer to rotate. The reducer drives the rotating ring 1131 to rotate, which in turn drives the cylinder 1133 to rotate. The cylinder 1133 contacts the sliding block 1123, which in turn drives the sliding block 1123 to rotate. The sliding block 1123 drives the turbulence ring 1121 to rotate, which in turn drives the turbulence plate 1122 to rotate inside the liquid storage ring 1111. The turbulence plate 1122 disturbs the spare coolant inside the liquid storage ring 1111, improving the heat dissipation efficiency of the spare coolant.

[0048] When the switching valve 121 switches to external circulation, the first spring drives the sliding block 1123 to slide away from the temperature control ring 113 and slide from the arc groove 1116 into the through hole 1115, causing the turbulence ring 1121 to stop rotating. When the temperature of the standby coolant in the reservoir ring 1111 is lower than the threshold, the cylinder 1133 will return to the temperature control cylinder 1132. Only when the switching valve switches to internal circulation and the temperature of the standby coolant in the reservoir ring 1111 exceeds the threshold will the cylinder 1133 contact the sliding block 1123 to prevent the turbulence ring 1121 from rotating ineffectively and reduce the kinetic energy consumption of the rotor assembly 214.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-efficiency heat dissipation permanent magnet synchronous motor, characterized in that: Includes a stator and rotor assembly (2), on which a junction box (3) is installed, and an end cover (4) is installed on one side of the stator and rotor assembly (2), and a heat dissipation device (1) is installed inside the end cover (4). The heat dissipation device (1) includes a liquid storage component (11) and a switching component (12). The switching component (12) is mounted on the stator and rotor device (2), and a drive component (13) is mounted on one side of the switching component (12). The liquid storage assembly (11) includes a liquid storage box (111), which is mounted on the stator and rotor device (2). A flow-turbulence element (112) is rotatably mounted inside the liquid storage box (111), and a temperature control ring (113) is mounted on the inner side of the flow-turbulence element (112). The temperature control ring (113) is mounted on the stator and rotor device (2). The switching assembly (12) includes a switching valve (121), the switching valve (121) includes a valve body (1211), a valve stem (1216) is slidably installed in the valve body (1211), and an inner circulation groove (1218) and an outer circulation groove (1217) are installed on the valve stem (1216).

2. The high-efficiency heat dissipation permanent magnet synchronous motor according to claim 1, characterized in that: The switching valve (121) is installed on the stator and rotor device (2), and a damping element (122) is installed on one side of the switching valve (121). The stator and rotor device (2) includes a main body (21), and a water-cooling assembly (22) is installed inside the main body (21).

3. The high-efficiency heat dissipation permanent magnet synchronous motor according to claim 2, characterized in that: The liquid storage box (111) includes a liquid storage ring (1111), which is mounted on the main body (21). The liquid storage ring (1111) is equipped with an outlet pipe (1112) and an inlet pipe (1113). A fixing ring (1114) is installed on one side of the liquid storage ring (1111), and a through hole (1115) is provided on the fixing ring (1114). An arc groove (1116) is provided on the inner side of the fixing ring (1114).

4. The high-efficiency heat dissipation permanent magnet synchronous motor according to claim 3, characterized in that: The turbulence element (112) includes a turbulence ring (1121) that rotates on a liquid storage ring (1111). A turbulence plate (1122) is installed on one side of the turbulence ring (1121) and is located inside the liquid storage ring (1111). A sliding groove is provided on the turbulence ring (1121), and a sliding block (1123) is slidably installed in the sliding groove. A first limiting block is installed on the sliding block (1123), and a first elastic element (1124) is installed on the first limiting block. One end of the first elastic element (1124) is installed on the turbulence ring (1121).

5. A high-efficiency heat-dissipating permanent magnet synchronous motor according to claim 4, characterized in that: The temperature control ring (113) includes a rotating ring (1131), which is mounted on the main body (21). A temperature control cylinder (1132) is installed inside the rotating ring (1131). A cylinder (1133) is slidably installed inside the temperature control cylinder (1132). A second limiting block is installed on one side of the cylinder (1133). A second elastic element (1134) is installed on the second limiting block. One end of the second elastic element (1134) is installed on the temperature control cylinder (1132).

6. A high-efficiency heat-dissipating permanent magnet synchronous motor according to claim 3, characterized in that: The valve body (1211) is mounted on the main body (21). The valve body (1211) is equipped with an inlet pipe (1212), an inner circulation pipe (1213) and an outer circulation pipe (1214). The outer circulation pipe (1214) and the liquid inlet pipe (1113) are connected by a pipeline. A temperature sensing bulb (1215) is mounted on one side of the valve body (1211). The valve stem (1216) slides inside the temperature sensing bulb (1215). A push plate is mounted on one side of the valve stem (1216). A shift fork (1219) is mounted on the valve stem (1216). A push block is mounted on the shift fork (1219).

7. A high-efficiency heat-dissipating permanent magnet synchronous motor according to claim 6, characterized in that: The damping element (122) includes a damping box (1221), which is mounted on the main body (21). A storage box (1222) is mounted on one side of the damping box (1221). A connecting pipe (1223) and a damping pipe (1224) are installed between the damping box (1221) and the storage box (1222). A one-way valve is installed inside the connecting pipe (1223). A pusher plate (1225) is mounted on one side of the valve stem (1216). A third elastic element (1226) is mounted on the pusher plate (1225). One end of the third elastic element (1226) is mounted on the damping box (1221).

8. A high-efficiency heat-dissipating permanent magnet synchronous motor according to any one of claims 1-7, characterized in that: The drive assembly (13) includes a mounting plate (131) mounted on the main body (21). A pump body (132) is mounted on one side of the mounting plate (131). An inlet pipe (133) and an outlet pipe (134) are mounted on the pump body (132). The inlet pipe (1212) and the outlet pipe (134) are connected by a pipe. A coupling (135) is mounted on the other side of the mounting plate (131). A drive shaft (139) is installed on the other side of the coupling ring (135) on the input shaft of the pump body (132). A buffer groove (136) and a limiting groove (137) are installed on the coupling ring (135). A centrifugal block (138) is slidably installed inside the drive shaft (139). A third limiting block is installed on the centrifugal block (138). A fourth elastic element is installed on the third limiting block. One end of the fourth elastic element is installed inside the drive shaft (139).

9. A high-efficiency heat-dissipating permanent magnet synchronous motor according to claim 8, characterized in that: The main body (21) includes a housing (211), the junction box (3) is mounted on the housing (211), a heat sink (212) is mounted on the outside of the housing (211), a stator assembly (213) is mounted inside the housing (211), a rotor assembly (214) is rotatably mounted inside the stator assembly (213), and an axial fan (215) is mounted on one side of the rotor assembly (214).

10. A high-efficiency heat-dissipating permanent magnet synchronous motor according to claim 9, characterized in that: The water-cooling assembly (22) includes a spiral tube (221), which is installed inside the housing (211). An outlet pipe (222) is installed on one side of the spiral tube (221), and the outlet pipe (222) and the pump inlet pipe (133) are connected by a pipe. An inlet pipe (223) is installed on the other side of the spiral tube (221), and a heat dissipation pipe is installed on one side of the inlet pipe (223). The internal circulation pipe (1213) and the heat dissipation pipe are connected by a pipe. The liquid outlet pipe (1112) and the inlet pipe (223) are connected by a pipe.

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