Low-torque pulsating flux reverse motor

Abstract

The invention discloses a low-torque pulsating flux reverse motor. The motor comprises a stator and an inner salient pole rotor; the inner salient pole rotor is equally divided into two sections alongthe axial direction of the inner salient pole rotor; two rotor tooth are staggered by a half tooth pitch; permanent magnets are evenly placed on the inner side surfaces of the stator teeth in the circumferential direction of the stator teeth; each permanent magnet is evenly divided into two sections in the axial direction of the permanent magnet and correspond to the two corresponding rotor teethrespectively; the magnetizing directions of the adjacent permanent magnets on the same section are opposite; and the magnetizing directions of the axially opposite permanent magnets on different sections are opposite; air gaps are formed between the permanent magnets on the inner side surfaces of the stator teeth and the inner salient pole rotor; and an armature winding is arranged on the stator.According to the low-torque pulsating flux reverse motor of the invention, the problem of back electromotive force asymmetry of a traditional flux reverse motor is solved; the torque density of the motor of the invention is not influenced; and the electromagnetic torque ripple of the motor is effectively reduced.

Description

technical field [0001] The invention belongs to the field of motors, in particular to a magnetic flux reversal motor. Background technique [0002] Due to the use of high magnetic energy permanent magnets, the permanent magnet motor has the advantages of high torque density, high power density, good weak magnetic performance, and high efficiency, and is suitable for operation in the full speed range. The stator permanent magnet flux reversal motor has been extensively studied due to its advantages of high torque density, high mechanical strength of the rotor, and easy heat dissipation when the permanent magnet is attached to the inner surface of the stator teeth. It has broad application prospects in the field of servo drives. However, the traditional flux reversal motor has the problem of back EMF asymmetry. The interaction between the asymmetric back EMF and the fundamental current leads to a large electromagnetic torque ripple, which deteriorates the output electromagneti...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems mentioned in the above-mentioned background technology, the present invention proposes a low-torque pulsating flux reversing motor, which solves the problem of back EMF asymmetry in traditional flux reversing motors and does not affect the torque density of the motor. And effectively reduce the electromagnetic torque ripple of the motor

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