A rotor structure of a permanent magnet motor with v-shaped oblique poles

A technology of permanent magnet motor and rotor structure, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit rotating parts, etc., can solve the problems of difficult realization of permanent magnet rotor, achieve the elimination of additional pulsating axial force, convenient operation, The effect of improving reliability and efficiency

Active Publication Date: 2018-08-07
愿景动力有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this structure, the permanent magnet rotor will be more difficult to realize

Method used

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  • A rotor structure of a permanent magnet motor with v-shaped oblique poles
  • A rotor structure of a permanent magnet motor with v-shaped oblique poles
  • A rotor structure of a permanent magnet motor with v-shaped oblique poles

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Embodiment Construction

[0023] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, the rotor structure of the V-shaped oblique pole of the permanent magnet motor of the present invention mainly includes four parts: the rotating shaft 1, the web plate 2, the cylinder body 3 and the unit magnetic pole 4. Such as figure 2 As shown, the inner layer of the rotor is a cylinder structure, and the cylinder 3 and the shaft 1 are welded through the web 2; the outer surface of the cylinder 3 is circular, and the coaxiality between the cylinder 3 and the shaft 1 must be ensured during processing At the same time, a dovetail groove 3-1 and a threaded hole 3-2 are machined in the axial direction on the surface of the cylinder 3, which are used to fix the unit magnetic pole 4 and the unit magnetic pole bead 12, and a threaded hole 3-2 is also processed on the end surface of the cylinder 3 , used to fi...

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Abstract

The invention discloses a rotor structure of a V-shaped oblique pole of a permanent magnet motor, which includes a rotating shaft, a spoke plate, a cylinder body and a unit magnetic pole. It is formed by stacking the rotor punches, and there are two symmetrical V-shaped sections on the cylinder along the axial direction. Each section is assembled from multiple unit magnetic poles. The unit magnetic poles are distinguished and positioned by their dovetail structure. When the magnetic pole of the unit is fixed, the dovetail structure is used to realize the design that the front half of the rotor is twisted and tilted along one side of the axial direction, and the second half is twisted and tilted to the opposite side at the same angle. Since the oblique poles of the two parts adopt different inclination directions, the axial reaction force generated by the oblique poles is offset, and the cogging torque can be eliminated at the same time, reducing the vibration and noise of the motor.

Description

technical field [0001] The invention relates to a structure of oblique poles of a permanent magnet motor rotor, belonging to the technical field of permanent magnet motors. Background technique [0002] Cogging torque is an additional pulsating torque that causes speed fluctuations, motor vibration and noise. Especially in variable speed drive, if the frequency of the cogging torque is close to the natural frequency of the system, it will cause resonance and increase noise. [0003] There are many measures to reduce or eliminate cogging torque, among which the use of oblique poles is one of the most common methods. For permanent magnet motors, since permanent magnets are installed on the rotor, the oblique pole structure of the rotor will increase the difficulty of installing the permanent magnets and the fixing and sealing of the permanent magnets. [0004] For the inclined pole structure, while eliminating the cogging torque, an additional axial force will be generated. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27
Inventor 王小东黄森林王雪张娜娜刘晓辉陈恒峰郭强
Owner 愿景动力有限公司
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