Permanent magnet motor for circular weaving machine

Abstract

This application relates to the field of permanent magnet motor technology, and in particular to a permanent magnet motor for circular looms, comprising a stator assembly, a rotor assembly, and a housing. The inner wall of the housing is provided with a heat dissipation guide plate, and spiral guide grooves are formed on the guide plate and connected to the cooling air duct. The stator assembly has an embedded intelligent control module connected to the stator winding. The rotor assembly includes a rotor core and permanent magnets. The cross-section of the magnetic pole slots is trapezoidal, and the surface of the permanent magnets is coated with a graphene-based thermally conductive coating. This application significantly improves heat dissipation performance and operational stability by optimizing the heat dissipation structure and improving the magnetic circuit layout. At the same time, the introduction of an intelligent control module enables rapid response and dynamic temperature control, effectively solving the problems of large starting current, obvious torque pulsation, and low energy efficiency, thus meeting the requirements of efficient and stable operation of circular looms.

Description

Technical Field

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

[0002] With the rapid development of the textile industry, circular looms, as important production equipment, have placed higher demands on the performance of drive motors. Permanent magnet motors, due to their advantages such as high efficiency, energy saving, and compact structure, are increasingly widely used in circular looms. However, existing permanent magnet motors still have many shortcomings in practical applications, making it difficult to fully meet the needs of circular looms for high precision, high efficiency, and fast response. For example, existing permanent magnet motors generally suffer from slow response speed, low energy efficiency, large starting current, and obvious torque pulsation. These problems are particularly prominent in the operation of high-precision and high-efficiency circular looms, directly affecting the production efficiency and product quality of the equipment.

[0003] The above problems indicate that traditional permanent magnet motors currently on the market have significant technical bottlenecks in meeting the new requirements of circular looms for high precision, high efficiency, and rapid response. Therefore, there is an urgent need to develop a permanent magnet motor specifically designed for circular looms to solve problems such as poor heat dissipation, high starting current, low control precision, and complex structure in existing technologies, thereby providing a more intelligent, efficient, and adaptable solution for changing production environments. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a permanent magnet motor for circular looms. This permanent magnet motor significantly improves the heat dissipation performance and operational stability of the motor by optimizing the heat dissipation structure design and improving the rotor magnetic circuit layout. At the same time, by introducing an intelligent control module, it achieves fast response and high-precision control, thereby effectively solving the problems of large starting current, obvious torque pulsation and low energy efficiency of existing permanent magnet motors in circular loom applications, and meeting the needs of circular looms for efficient and stable operation.

[0005] A permanent magnet motor for a circular loom is provided, comprising a stator assembly, a rotor assembly, and a housing. A heat dissipation guide plate is fixedly installed on the inner wall of the housing, and multiple guide grooves are formed on the heat dissipation guide plate. A cooling air duct is fixedly installed on the outer side of the housing, and the cooling air duct is connected to the guide grooves. An intelligent control module is embedded inside the stator assembly, and the output end of the intelligent control module is electrically connected to the stator winding. The rotor assembly includes a rotor core and permanent magnets. Multiple magnetic pole slots are evenly distributed on the outer periphery of the rotor core, and the permanent magnets are embedded in the magnetic pole slots. The surface of the permanent magnets is coated with a thermally conductive coating. An output shaft is fixedly installed at the center of the rotor core, and one end of the output shaft extends to the outside of the housing and is connected to the circular loom for transmission.

[0006] The heat dissipation guide plate includes a guide plate body, with positioning protrusions fixedly installed on both sides of the guide plate body, and positioning grooves opened on the inner wall of the outer shell, with the positioning protrusions cooperating with the positioning grooves; the guide channels are distributed in a spiral shape, and the inlet end of the guide channels is connected to the air outlet of the cooling air duct, and the outlet end of the guide channels extends to the bottom of the outer shell; the intelligent control module includes a signal processing unit and a drive unit, the input end of the signal processing unit is electrically connected to the control system of the circular loom, and the output end of the drive unit is electrically connected to the stator winding.

[0007] Specifically, the rotor assembly also includes a damping ring, which is fixedly installed at both ends of the rotor core. Multiple damping grooves are opened on the inner side of the damping ring, and the damping grooves are filled with elastic material. The thermally conductive coating on the surface of the permanent magnet is made of graphene-based composite material, and the thickness of the thermally conductive coating is 0.1mm to 0.3mm. The cross-sectional shape of the magnetic pole groove is trapezoidal, and the opening width of the magnetic pole groove is smaller than its bottom width.

[0008] Preferably, a filter screen is installed at the air inlet of the cooling air duct, with a pore size of 0.5mm to 1mm, to prevent dust from entering the cooling air duct and affecting the heat dissipation effect.

[0009] Specifically, a temperature sensor is fixedly installed at the bottom of the outer casing. The detection end of the temperature sensor is in contact with the heat dissipation guide plate, and the output end of the temperature sensor is electrically connected to the input end of the intelligent control module. The intelligent control module adjusts the current of the stator winding according to the feedback signal of the temperature sensor to achieve dynamic temperature control of the motor.

[0010] Furthermore, the outer surface of the output shaft is hardened with a hardened layer thickness of 0.2mm to 0.5mm to improve the wear resistance and service life of the output shaft.

[0011] This invention significantly improves the heat dissipation performance and operational stability of the motor by optimizing the heat dissipation structure design and improving the rotor magnetic circuit layout. At the same time, by introducing an intelligent control module, it achieves rapid response and high-precision control, thereby effectively solving the problems of large starting current, obvious torque pulsation and low energy efficiency of existing permanent magnet motors in circular loom applications, and meeting the needs of circular looms for efficient and stable operation. 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 motor used in a circular loom according to the present invention.

[0014] Figure 1 Including:

[0015] 1. Outer casing; 2. Heat dissipation guide plate; 3. Cooling air duct; 4. Guide groove; 5. Positioning protrusion; 6. Positioning groove; 7. Stator winding; 8. Intelligent control module; 9. Rotor core; 10. Permanent magnet; 11. Magnetic pole slot; 12. Output shaft; 13. Vibration damping ring; 14. Vibration damping groove; 15. Filter screen; 16. Temperature sensor. Detailed Implementation

[0016] The present invention will be further described in conjunction with the following embodiments.

[0017] Example 1

[0018] This utility model provides a permanent magnet motor for a circular loom, such as... Figure 1 As shown, the permanent magnet motor includes a housing 1, a heat dissipation guide plate 2, a cooling air duct 3, a stator winding 7, an intelligent control module 8, a rotor assembly, and an output shaft 12, among other main components. Through optimized design and reasonable layout, these components together achieve the goals of efficient heat dissipation, stable operation, and high-precision control.

[0019] First, the outer casing 1 serves as the external protective structure for the entire motor. A heat dissipation guide plate 2 is fixedly installed on its inner wall. The design of the heat dissipation guide plate 2 is one of the key innovations of this invention. The heat dissipation guide plate 2 includes a guide plate body, with positioning protrusions 5 on both sides. A corresponding positioning groove 6 is formed on the inner wall of the outer casing 1. This positioning structure ensures the stable installation of the heat dissipation guide plate 2 within the outer casing 1, while avoiding loosening due to vibration or thermal expansion. The heat dissipation guide plate 2 also has multiple guide channels 4, which are spirally distributed, and their inlet ends connect with the cooling air duct 3. The air outlets are connected, with the outlet extending to the bottom of the outer casing 1. A filter screen 15 is installed at the air inlet of the cooling air duct 3. The filter screen 15 has a pore size of 0.5mm to 1mm, which can effectively prevent dust from entering the cooling air duct 3, thereby ensuring the long-term stable operation of the heat dissipation system. In practical applications, when the motor is running, the cooling air duct 3 introduces cold air through an external fan or natural convection. The cold air is guided by the guide groove 4 to form a spiral airflow, thereby evenly removing the heat generated inside the motor. This spiral guide groove 4 design not only improves heat dissipation efficiency but also reduces airflow resistance, further reducing energy consumption.

[0020] Secondly, an intelligent control module 8 is embedded inside the stator assembly. The output of the intelligent control module 8 is electrically connected to the stator winding 7. The intelligent control module 8 includes a signal processing unit and a drive unit. The input of the signal processing unit is electrically connected to the control system of the circular loom, and the output of the drive unit is electrically connected to the stator winding 7. During actual operation, the control system of the circular loom sends command signals to the intelligent control module 8 according to process requirements. After the signal processing unit analyzes the received signals, it adjusts the current magnitude and frequency of the stator winding 7 through the drive unit, thereby achieving precise control of the motor speed and torque. In addition, a temperature sensor is also fixedly installed at the bottom of the outer casing 1. Temperature sensor 16 has its detection end in contact with heat dissipation guide plate 2, and its output end is electrically connected to the input end of intelligent control module 8. Temperature sensor 16 monitors the temperature change inside the motor in real time and feeds back the detected temperature signal to intelligent control module 8. Intelligent control module 8 dynamically adjusts the current of stator winding 7 according to the temperature signal to achieve dynamic temperature control of the motor. For example, when the internal temperature of the motor rises, intelligent control module 8 will appropriately reduce the current of stator winding 7 to reduce heat generation; conversely, when the temperature is low, the current can be appropriately increased to meet the load requirements. This closed-loop control mechanism significantly improves the operating stability and energy efficiency of the motor.

[0021] The rotor assembly is another core component of this invention. The rotor assembly includes a rotor core 9 and permanent magnets 10. Multiple magnetic pole slots 11 are evenly distributed around the outer periphery of the rotor core 9. The permanent magnets 10 are embedded within the magnetic pole slots 11. The cross-sectional shape of the magnetic pole slots 11 is trapezoidal, and their opening width is smaller than their bottom width. This design not only enhances the fixing strength of the permanent magnets 10 but also optimizes the magnetic circuit distribution, thereby improving the electromagnetic performance of the motor. The surface of the permanent magnets 10 is coated with a thermally conductive coating made of graphene-based composite material, with a thickness of 0.1 mm to 0.3 mm. The graphene-based composite material has excellent thermal conductivity, which can quickly conduct the heat generated by the permanent magnet 10 to the rotor core 9, and then dissipate it through the heat dissipation guide plate 2, thereby effectively avoiding the demagnetization phenomenon caused by overheating of the permanent magnet 10. In addition, the rotor assembly also includes a damping ring 13, which is fixedly installed at both ends of the rotor core 9. Multiple damping grooves 14 are opened on its inner side, and the damping grooves 14 are filled with elastic material. The design of the damping ring 13 can effectively absorb the vibration generated during the operation of the motor, thereby reducing noise and extending the service life of the motor.

[0022] The output shaft 12 is a key component connecting the motor and the circular loom transmission system. One end of it extends to the outside of the outer casing 1 and is connected to the circular loom transmission. To improve the wear resistance and service life of the output shaft 12, its outer surface is hardened, with a hardened layer thickness of 0.2mm to 0.5mm. In practical applications, the output shaft 12 is connected to the transmission mechanism of the circular loom via a keyway or other connection method to transmit the rotational power of the motor to the working parts of the circular loom. Since the circular loom needs to start, stop, and change speed frequently during operation, it places high demands on the starting performance and dynamic response capability of the motor. This utility model significantly reduces the starting current and torque pulsation by optimizing the rotor magnetic circuit layout and introducing the intelligent control module 8, thereby meeting the circular loom's requirements for efficient and stable operation.

[0023] In practical applications, the permanent magnet motor of this invention can be widely used in various circular looms. For example, in high-speed circular looms, the motor needs to maintain high speed for a long time, and the efficiency of the heat dissipation system is particularly important. Through the synergistic effect of the cooling air duct 3 and the heat dissipation guide plate 2, the heat inside the motor can be quickly removed, thereby avoiding performance degradation caused by overheating. At the same time, the dynamic temperature control function of the intelligent control module 8 can flexibly adjust the motor's operating parameters according to the actual working conditions, further improving energy efficiency. Under low-speed heavy-load conditions, the starting performance and torque output capability of the motor are particularly critical. This invention significantly improves the starting performance and load capacity of the motor by improving the rotor magnetic circuit layout and optimizing the fixing method of the permanent magnet 10, thereby meeting the usage requirements of circular looms under different working conditions.

[0024] In summary, this invention significantly improves the heat dissipation performance and operational stability of the motor by optimizing the heat dissipation structure design and improving the rotor magnetic circuit layout. At the same time, by introducing the intelligent control module 8, it achieves rapid response and high-precision control, thereby effectively solving the problems of large starting current, obvious torque pulsation and low energy efficiency of existing permanent magnet motors in circular loom applications, and meeting the needs of circular looms for efficient and stable operation.

[0025] 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 motor for a circular weaving machine, characterized in that: The device includes an outer casing, a stator assembly, a rotor assembly, and an output shaft. A heat dissipation guide plate is fixedly installed on the inner wall of the outer casing, and multiple guide grooves are formed on the heat dissipation guide plate. A cooling air duct is fixedly installed on the outer side of the outer casing, and the cooling air duct is connected to the guide grooves. The stator assembly is internally equipped with an intelligent control module, and the output terminal of the intelligent control module is electrically connected to the stator winding. The rotor assembly includes a rotor core and a permanent magnet. Multiple magnetic pole slots are evenly distributed on the outer periphery of the rotor core. The permanent magnet is embedded in the magnetic pole slots. The surface of the permanent magnet is coated with a thermally conductive coating. The output shaft is fixedly installed at the center of the rotor core. One end of the output shaft extends to the outside of the outer casing.

2. A permanent magnet machine for a circular weaving machine according to claim 1, characterized in that: The heat dissipation guide plate includes a guide plate body, and positioning protrusions are fixedly installed on both sides of the guide plate body. A positioning groove is opened on the inner wall of the outer shell, and the positioning protrusions cooperate with the positioning groove. The guide channels are spirally distributed, and the inlet end of the guide channels is connected to the air outlet of the cooling air duct, while the outlet end of the guide channels extends to the bottom of the outer casing.

3. A permanent magnet motor for a circular weaving machine according to claim 2, characterized in that: The intelligent control module includes a signal processing unit and a drive unit. The input terminal of the signal processing unit is electrically connected to the control system of the circular loom, and the output terminal of the drive unit is electrically connected to the stator winding.

4. A permanent magnet machine for a circular weaving machine according to claim 3, characterized in that: The rotor assembly also includes a damping ring, which is fixedly installed at both ends of the rotor core. The damping ring has multiple damping grooves on its inner side, and the damping grooves are filled with elastic material. The thermally conductive coating on the surface of the permanent magnet is made of graphene-based composite material, and the thickness of the thermally conductive coating is 0.1 mm to 0.3 mm. The cross-sectional shape of the magnetic pole groove is trapezoidal, and the opening width of the magnetic pole groove is smaller than its bottom width.

5. A permanent magnet machine for a circular weaving machine according to claim 4, characterized in that: A filter screen is installed at the air inlet of the cooling air duct, and the filter screen has a pore size of 0.5mm to 1mm.

6. A permanent magnet machine for a circular weaving machine according to claim 5, characterized in that: A temperature sensor is fixedly installed at the bottom of the housing. The detection end of the temperature sensor is in contact with the heat dissipation guide plate, and the output end of the temperature sensor is electrically connected to the input end of the intelligent control module. The outer surface of the output shaft is hardened, and the thickness of the hardened layer is 0.2mm to 0.5mm.

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