Unlock instant, AI-driven research and patent intelligence for your innovation.

Rotor structure and permanent magnet synchronous motor

A rotor structure and permanent magnet technology, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit, electrical components, etc., can solve problems such as permanent magnet demagnetization, achieve optimized magnetic circuit, solve demagnetization phenomenon, reduce vibration and noise Effect

Active Publication Date: 2021-06-18
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the purposes of the present invention is to propose a rotor structure and a permanent magnet synchronous motor, which solves the technical problem that permanent magnets are prone to demagnetization in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotor structure and permanent magnet synchronous motor
  • Rotor structure and permanent magnet synchronous motor
  • Rotor structure and permanent magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment describes the rotor structure of the present invention in detail.

[0034] The rotor structure of this embodiment includes a rotor body 10, such as Figure 1~3 , Figure 6 and 7shown. Preferably, the rotor body 10 is provided with a plurality of permanent magnet slots 101 in the circumferential direction, the permanent magnet slots 101 are used to place the permanent magnets 102, and the two ends of each permanent magnet slot 101 are respectively provided with a first magnetic isolation hole 103 and The second magnetic isolation hole 104, and the first magnetic isolation hole 103 and the second magnetic isolation hole 104 are respectively connected to the two ends of the permanent magnet slot 101, the first magnetic isolation hole 103 and the second magnetic isolation hole 104 are about the rotor body 10 Direct axis symmetric distribution, such as figure 1 with 2 , Figure 6 with 7 shown. The circumferential direction of the rotor body 10 mention...

Embodiment 2

[0043] This embodiment describes the permanent magnet synchronous motor of the present invention in detail.

[0044] The permanent magnet synchronous motor of this embodiment includes the rotor structure of any one of the technical solutions in Embodiment 1. Preferably, the permanent magnet synchronous motor is a rare earth permanent magnet synchronous motor. The permanent magnet synchronous motor of this embodiment has the rotor structure of any one of the technical solutions in Embodiment 1. On the one hand, it can reduce the torque ripple of the motor operation, reduce the vibration and noise of the motor, and on the other hand, it can also reduce the vibration of the permanent magnet. The denseness of the magnetic force lines at both ends of the permanent magnet 102 improves the anti-demagnetization ability of the permanent magnet 102, thereby improving the safety, efficiency and stability of the motor operation and ensuring the service life of the motor. That is, the per...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a rotor structure and a permanent magnet synchronous motor, relates to the technical field of motors, and solves a technical problem that a permanent magnet is easy to demagnetize in the prior art. The rotor structure comprises a rotor body, the rotor body is provided with a plurality of permanent magnet grooves in a circumferential direction, the permanent magnet grooves are used for placing permanent magnets, the two ends of each permanent magnet groove are provided with a first magnetic isolation hole and a second magnetic isolation hole respectively, and the first magnetic isolation hole and the second magnetic isolation hole are connected with the two ends of the permanent magnet groove respectively. The first magnetic isolation holes and the second magnetic isolation holes are symmetrically distributed about the straight axis of the rotor body. According to the rotor structure, through the arrangement of the first magnetic isolation holes and the second magnetic isolation holes, on one hand, torque pulsation of motor operation can be reduced, vibration and a noise of the motor are reduced, on the other hand, the density degree of magnetic lines at the two ends of the permanent magnets can be reduced, and the demagnetization resistance of the permanent magnets is improved; and therefore, the operation safety, efficiency and stability of the motor can be improved, and the service life of the motor is guaranteed.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor structure and a permanent magnet synchronous motor including the rotor structure. Background technique [0002] Permanent magnet synchronous motors have the characteristics of high torque density, low manufacturing cost, and wide high-efficiency area, and are widely used in the field of home appliances. However, in the permanent magnet synchronous motor, the most critical permanent magnet inside the rotor is prone to demagnetization under severe working conditions such as high current or relatively large load, especially the demagnetization at both ends of the permanent magnet is more serious, which is harmful to the motor. The efficiency and stability of operation and the service life of the motor all have a great influence. In order to improve the anti-demagnetization ability of the permanent magnets of the motor, various rotor structures and permanent magnet motors hav...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K1/274H02K2213/03
Inventor 张华锋刘才周博陈华杰李景顺张辉
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION