Motor rotor and motor
By adjusting the relationship between the length of the protruding part of the motor rotor and the thickness of the magnetic part and the surface shape, and setting grooves on both sides of the protruding part, the torque pulsation problem of the surface-embedded permanent magnet motor was solved, and the stability and efficiency of the motor were improved.
CN111697727BActive Publication Date: 2025-09-19ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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Patent Information
- Application Number
- CN202010592310.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-06-24
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2040-06-24
AI Technical Summary
Technical Problem
The torque pulsation of existing surface-embedded permanent magnet motors is large, resulting in excessive motor vibration and noise, which affects the motor's starting and operating stability, especially the position control accuracy at low speeds.
Method used
By setting the relationship between the length of the extension and the thickness of the magnetic part, the shape of the surface of the extension is adjusted, and grooves are provided on both sides of the extension to optimize the shape of the grooves and reduce torque pulsation.
Benefits of technology
It significantly reduces the torque ripple of the motor, reduces the vibration and noise of the motor, improves the operating stability, reduces the stray loss and improves the motor efficiency.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention relates to a rotor and a motor. The rotor has an embedded rotor structure and includes: a rotor core, multiple extensions, and multiple magnetic components. The multiple extensions are distributed circumferentially on the rotor core, and each of the multiple magnetic components is arranged between two adjacent extensions. The multiple magnetic components are arranged alternately with north and south poles along the circumference of the rotor core. By setting a relationship between the length of the extension and the thickness of the magnetic components, the problems of large torque pulsation, large motor vibration, and large noise in existing motors are solved. At the same time, the problems of large motor cogging torque, poor operating stability, and large speed fluctuations during low-speed operation are solved. While solving the large motor torque pulsation and large cogging torque, the motor stray losses can be reduced, which is conducive to improving the motor efficiency.
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