Permanent magnet synchronous motor

Abstract

The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a permanent magnet synchronous motor which comprises a stator assembly, a rotor assembly, a shell, a cooling module and an intelligent control unit, a winding coil is embedded in a stator groove, a permanent magnet ring is installed on the outer side of a rotor, the width of an air gap ranges from 0.8 mm to 1.2 mm, a diversion trench is formed, the heat dissipation effect is enhanced, and the service life of the rotor is prolonged. The cooling module is dynamically cooled through cooling liquid, the intelligent control unit monitors the rotating speed and the load in real time and dynamically adjusts current input so as to accurately control the torque, heat dissipation fins are arranged on the outer surface of the shell, and the overall heat dissipation performance is improved. The problems of overheating and torque fluctuation under high rotating speed and high load are effectively solved, the operation efficiency and stability are remarkably improved, and the service life is remarkably prolonged.

Description

Technical Field

[0001] This utility model relates to the field of electric motor technology, and in particular to a permanent magnet synchronous motor. Background Technology

[0002] Permanent magnet synchronous motors are used in various fields such as transportation and home appliances. However, in practical applications, existing permanent magnet synchronous motors still have many problems that need to be solved under high speed and high load conditions. For example, when running at high speed, the motor is prone to large torque fluctuations, leading to a decrease in output stability; at the same time, under high load conditions, the internal losses of the motor increase, which can easily cause overheating problems, thereby affecting its efficiency, reliability and service life.

[0003] Currently, permanent magnet synchronous motors on the market struggle to achieve efficient, stable, and reliable operation under high speed and high load conditions, especially under variable operating conditions. Therefore, there is an urgent need for a new type of permanent magnet synchronous motor design to overcome the shortcomings of existing technologies and provide a more efficient, stable, and adaptable solution for various operating conditions. Utility Model Content

[0004] The purpose of this invention is to provide a permanent magnet synchronous motor that avoids the shortcomings of the prior art. This permanent magnet synchronous motor effectively solves the overheating problem and torque fluctuation problem under high speed and high load conditions by optimizing the structural design between the stator and rotor and introducing a dynamic cooling system and intelligent torque control module, thereby improving the operating efficiency, stability and service life of the motor.

[0005] A permanent magnet synchronous motor is provided, including a stator assembly, a rotor assembly, and a housing. The stator assembly is fixedly installed inside the housing, and the rotor assembly is rotatably connected to the housing via bearings. The inner side of the stator assembly has multiple evenly distributed stator slots, and winding coils are embedded in the stator slots. A permanent magnet ring is fixedly installed on the outer side of the rotor assembly, and an air gap is formed between the outer surface of the permanent magnet ring and the inner surface of the stator assembly. A cooling module is fixedly installed on the top of the housing, and the output end of the cooling module extends between the stator assembly and the rotor assembly and communicates with the air gap. An intelligent control unit is fixedly installed on the bottom of the housing, and the signal output end of the intelligent control unit is electrically connected to the stator assembly.

[0006] The cooling module includes a coolant storage tank, a micro pump is fixedly installed on the side of the coolant storage tank, the output end of the micro pump is connected to the cooling nozzle through a conduit, the cooling nozzle is fixedly installed on the inner wall of the outer shell, the spray direction of the cooling nozzle is towards the air gap, a return channel is provided at the bottom of the coolant storage tank, the return channel is connected to the coolant storage tank, and a filter screen is installed at the inlet of the return channel.

[0007] Specifically, the intelligent control unit includes a signal processor. The input of the signal processor is electrically connected to the speed sensor on the rotor assembly, and the output of the signal processor is electrically connected to the power regulation module. The output of the power regulation module is electrically connected to the winding coil of the stator assembly. The signal processor dynamically adjusts the current input of the winding coil to achieve precise control of the output torque by monitoring the rotational speed and load status of the rotor assembly in real time.

[0008] Preferably, the width of the air gap is between 0.8 mm and 1.2 mm, and multiple guide grooves are provided in the air gap, which are evenly distributed along the circumference. The depth of the guide grooves is between 0.2 mm and 0.4 mm, which is used to enhance the fluidity and heat dissipation effect of the coolant.

[0009] Specifically, the permanent magnet ring is composed of multiple arc-shaped permanent magnet segments. Each arc-shaped permanent magnet segment has positioning protrusions at both ends. The positioning protrusions cooperate with the grooves of adjacent arc-shaped permanent magnet segments to ensure the integrity and stability of the permanent magnet ring.

[0010] Furthermore, the outer surface of the casing is provided with multiple heat dissipation fins, which are evenly distributed along the axial direction of the casing. The thickness of the heat dissipation fins is 1mm to 2mm, which is used to improve the heat dissipation performance of the casing.

[0011] This invention effectively solves the overheating and torque fluctuation problems under high speed and high load conditions by optimizing the structural design between the stator and rotor, and combining a dynamic cooling system and an intelligent torque control module. This significantly improves the operating efficiency, stability and service life of the motor, and meets the usage requirements under various operating conditions. Attached Figure Description

[0012] The present invention will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the present invention.

[0013] Figure 1 This is a schematic diagram of the permanent magnet synchronous motor of this utility model.

[0014] Figure 2 This is a schematic diagram of the cooling module in the permanent magnet synchronous motor of this utility model.

[0015] from Figures 1 to 2 Including:

[0016] 1. Housing; 2. Stator assembly; 3. Rotor assembly; 4. Bearing; 5. Stator slot; 6. Winding coil; 7. Permanent magnet ring; 8. Air gap; 9. Cooling module; 10. Coolant storage tank; 11. Micro pump; 12. Conduit; 13. Cooling nozzle; 14. Return channel; 15. Filter screen; 16. Intelligent control unit; 17. Signal processor; 18. Speed ​​sensor; 19. Power regulation module; 20. Heat sink fins; 21. Air guide groove; 22. Positioning protrusion. Detailed Implementation

[0017] The present invention will be further described in conjunction with the following embodiments.

[0018] Example 1.

[0019] This utility model provides a permanent magnet synchronous motor, such as Figure 1 As shown, the permanent magnet synchronous motor includes a housing 1, a stator assembly 2, a rotor assembly 3, a cooling module 9, and an intelligent control unit 16. The housing 1 serves as the support structure for the entire motor, and the stator assembly 2 is fixedly installed inside it. The rotor assembly 3 is rotatably connected to the housing 1 through a bearing 4, thereby enabling the rotor assembly 3 to rotate at high speed inside the stator assembly 2. The inner side of the stator assembly 2 is provided with multiple evenly distributed stator slots 5, and winding coils 6 are embedded in the stator slots 5. These winding coils 6 generate a magnetic field through current, which interacts with the permanent magnet ring 7 on the rotor assembly 3, thereby driving the rotor assembly 3 to rotate. The permanent magnet ring 7 is fixedly installed on the outer side of the rotor assembly 3, and an air gap 8 is formed between its outer surface and the inner surface of the stator assembly 2. The width of the air gap 8 is preferably 0.8 mm to 1.2 mm to ensure effective transmission of the magnetic field and reduce energy loss.

[0020] To further optimize heat dissipation performance, multiple guide grooves 21 are evenly distributed along the circumference within the air gap 8. The depth of the guide grooves 21 is 0.2mm to 0.4mm. The design of the guide grooves 21 can enhance the flow and heat dissipation effect of the coolant within the air gap 8, thereby effectively reducing the temperature rise problem under high speed and high load conditions. In addition, the permanent magnet ring 7 is composed of multiple arc-shaped permanent magnet segments. Each arc-shaped permanent magnet segment has positioning protrusions 22 at both ends. The positioning protrusions 22 cooperate with the grooves of adjacent arc-shaped permanent magnet segments. This design not only improves the integrity and stability of the permanent magnet ring 7, but also facilitates operation during production and assembly.

[0021] The cooling module 9 is fixedly installed on the top of the housing 1. Its core components include a coolant storage tank 10, a micro pump 11, a conduit 12, and a cooling nozzle 13. The coolant storage tank 10 is used to store coolant. The micro pump 11 delivers the coolant to the cooling nozzle 13 through the conduit 12. The cooling nozzle 13 is fixedly installed on the inner wall of the housing 1, and its spray direction is towards the air gap 8, thereby directly cooling the high-temperature area between the stator assembly 2 and the rotor assembly 3. After completing the cooling task, the coolant returns to the coolant storage tank 10 through the return channel 14. A filter screen 15 is installed at the inlet of the return channel 14 to filter impurities in the coolant and prevent blockage or damage to the cooling system. This dynamic cooling system design significantly improves the heat dissipation capacity of the motor under high load conditions and extends the service life of the equipment.

[0022] The intelligent control unit 16 is fixedly installed at the bottom of the housing 1. Its core components include a signal processor 17, a speed sensor 18, and a power regulation module 19. The speed sensor 18 is installed on the rotor assembly 3 and is used to monitor the rotational speed and load status of the rotor assembly 3 in real time. It transmits the collected data to the signal processor 17. The signal processor 17 dynamically adjusts the output parameters of the power regulation module 19 according to the received data, thereby precisely controlling the current input of the winding coil 6 in the stator assembly 2. This intelligent torque control module design can effectively solve the torque fluctuation problem that occurs in the operation of traditional permanent magnet synchronous motors and improve the operating efficiency and stability of the motor.

[0023] To further improve heat dissipation performance, multiple heat dissipation fins 20 are provided on the outer surface of the housing 1. The heat dissipation fins 20 are evenly distributed along the axial direction of the housing 1, and their thickness is 1mm to 2mm. The design of the heat dissipation fins 20 increases the surface area of ​​the housing 1, thereby improving the heat dissipation performance of the housing 1 and keeping the motor at a low operating temperature during long-term operation. In addition, the material of the housing 1 is preferably aluminum alloy or copper alloy, which have good thermal conductivity and can further enhance the heat dissipation effect.

[0024] This invention effectively solves this problem by introducing a dynamic cooling system and an intelligent torque control module. When the motor starts, the speed sensor 18 monitors the rotational speed and load status of the rotor assembly 3 in real time and transmits the data to the signal processor 17. The signal processor 17 dynamically adjusts the current input of the winding coil 6 according to the current operating conditions, thereby achieving precise control of the output torque. At the same time, the cooling module 9 delivers coolant to the cooling nozzle 13 through the micro pump 11. The cooling nozzle 13 sprays the coolant into the air gap 8 to directly cool the high-temperature area. After completing the cooling task, the coolant returns to the coolant storage tank 10 through the return channel 14. After being filtered by the filter screen 15, it is recycled again. This efficient cooling method can quickly reduce the temperature rise of the motor and ensure its stable operation under high load conditions.

[0025] Furthermore, the permanent magnet synchronous motor of this invention is designed with ease of assembly and maintenance in mind. For example, the permanent magnet ring 7 adopts a multi-segment arc-shaped permanent magnet splicing method, which not only improves the overall integrity and stability but also facilitates operation during production and assembly. Meanwhile, all components of the cooling module 9 adopt a modular design, which is easy to disassemble and replace. The heat dissipation fins 20 on the outer surface of the housing 1 have also been optimized, which improves heat dissipation performance without adding too much weight and volume, thus meeting the usage requirements under various working conditions.

[0026] In summary, this invention effectively solves the overheating and torque fluctuation problems under high speed and high load conditions by optimizing the structural design between the stator and rotor and combining a dynamic cooling system and an intelligent torque control module. This significantly improves the operating efficiency, stability, and service life of the motor. The heat dissipation fins 20 of the outer casing 1, the guide grooves 21 in the air gap 8, and the efficient cooling method of the cooling module 9 together constitute a complete heat dissipation system, ensuring that the motor maintains a good working condition under various operating conditions. The intelligent control unit 16 achieves precise control of the output torque through real-time monitoring and dynamic adjustment, further improving the performance of the motor. The design concept and technical solution of this invention have wide applicability and practicality, and can meet the diverse needs of industrial automation equipment, new energy vehicle drive systems, and home appliances.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A permanent magnet synchronous motor, characterized in that: The device includes a housing, a stator assembly, a rotor assembly, a cooling module, and an intelligent control unit. The stator assembly is fixedly installed inside the housing, and the rotor assembly is rotatably connected to the housing via bearings. The inner side of the stator assembly has multiple evenly distributed stator slots, and winding coils are embedded in the stator slots. A permanent magnet ring is fixedly installed on the outer side of the rotor assembly, and an air gap is formed between the outer surface of the permanent magnet ring and the inner surface of the stator assembly. The cooling module is fixedly installed on the top of the housing, and its output end extends between the stator assembly and the rotor assembly and communicates with the air gap. The intelligent control unit is fixedly installed on the bottom of the housing, and its signal output end is electrically connected to the stator assembly.

2. The permanent magnet synchronous motor according to claim 1, characterized in that: The cooling module includes a coolant storage tank, a micro pump, a conduit, and a cooling nozzle. The coolant storage tank is fixedly installed on the top of the outer casing. The micro pump is fixedly installed on the side of the coolant storage tank. The output end of the micro pump is connected to the cooling nozzle through the conduit. The cooling nozzle is fixedly installed on the inner wall of the outer casing and sprays towards the air gap. A return channel is provided at the bottom of the coolant storage tank, and the return channel communicates with the coolant storage tank. A filter screen is installed at the inlet of the return channel.

3. A permanent magnet synchronous motor according to claim 2, characterized in that: The intelligent control unit includes a signal processor, a speed sensor, and a power regulation module. The speed sensor is mounted on the rotor assembly and electrically connected to the signal processor. The output terminal of the signal processor is electrically connected to the power regulation module, and the output terminal of the power regulation module is electrically connected to the winding coil of the stator assembly.

4. A permanent magnet synchronous motor according to claim 3, characterized in that: The width of the air gap is 0.8 mm to 1.2 mm, and multiple guide grooves are provided in the air gap, which are evenly distributed along the circumference. The depth of the guide grooves is 0.2 mm to 0.4 mm.

5. A permanent magnet synchronous motor according to claim 4, characterized in that: The permanent magnet ring is composed of multiple arc-shaped permanent magnet segments. Each arc-shaped permanent magnet segment has positioning protrusions at both ends, which cooperate with the adjacent arc-shaped permanent magnet segments.

6. A permanent magnet synchronous motor according to claim 5, characterized in that: The outer surface of the housing is provided with a plurality of heat dissipation fins, which are evenly distributed along the axial direction of the housing, and the thickness of the heat dissipation fins is 1mm to 2mm.

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