Low-torque ripple permanent magnet flux-switching motor

Abstract

The invention provides a low-torque ripple permanent magnet flux-switching motor, which is formed by combining two permanent magnet flux-switching motors with a completely identical structure. The two permanent magnet flux-switching motors share a shell and a rotating shaft, and are arranged on a left side and a right side. Two sections of teeth of a rotor core are staggered by an electrical angle of 180 / P degrees under the condition of aligning the two sections of teeth of a stator core, and the two sections of teeth of the stator core are staggered by the electrical angle of 180 / P degrees under the condition of aligning the two sections of teeth of the rotor core, wherein P is a phase number. The low-torque ripple permanent magnet flux-switching motor has the advantages of high efficiency, power density, reliability and back electromotive force waveform sinusoidal properties, vast application prospect and the like, and is easy to control.

Description

technical field [0001] The invention relates to a permanent magnet switch flux linkage motor, in particular to a low torque pulsation permanent magnet switch flux linkage motor. Background technique [0002] The permanent magnet flux-switching motor (PMFSM) with permanent magnets embedded in the stator teeth was first proposed by scholars Rauch and Johnson in 1955. Its structure is as follows: figure 1 As shown, there was little research on this kind of motor for a long time afterwards. With the development of permanent magnet materials, scholars such as Hoang refocused their research on PMFSM in 1997, and then some people proposed a hybrid excitation switching flux linkage motor, such as figure 2 shown. In recent years, domestic scholars have also begun to study permanent magnet switch flux linkage motors. image 3 Shown is a cross-sectional view of a 24V, 450W, 1500r / min three-phase 6 / 5 pole structure permanent magnet switch flux linkage motor developed by Zhejiang Uni...

AI Technical Summary

Problems solved by technology

[0005] However, the electromagnetic torque of the permanent magnet switch flux linkage motor is mainly generated by the permanent magnet, the reluctance torque is relatively small, and the positioning torque of the motor is relatively large, resulting in relatively large torque ripple of the motor, and the resulting vibration and noise are biased. Big

[0006] It is known from the above that the permanent magnet switch flux linkage motor in the prior art has a large positioning torque and prominent torque ripple, which limits its application in the servo field and other occasions that require high torque ripple.

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