Axial magnetic flux permanent magnet motor with unequal pole-arc coefficients

Abstract

The invention discloses an axial magnetic flux permanent magnet motor with unequal pole-arc coefficients, which comprises a stator, a first rotor disc and a second rotor disc, wherein the stator is located between the first rotor disc and the second rotor disc, the first rotor disc and the second rotor disc are coaxially arranged, and the first rotor disc comprises a first rotor iron core and a plurality of first permanent magnets; the second rotor disc comprises a second rotor iron core and a plurality of second permanent magnets; the plurality of permanent magnets are uniformly arranged in the circumferential direction of the rotor iron core, and the pole-arc coefficients of the adjacent permanent magnets are not equal; each first permanent magnet corresponds to one second permanent magnet opposite to the first permanent magnet; the center line of the first permanent magnet and the center line of the corresponding second permanent magnet are on the same center plane, and the pole-arc coefficients of the first permanent magnet and the corresponding second permanent magnet are not equal. By adopting the method of combining the permanent magnets of the double rotors with unequal pole-arc coefficients, the torque ripples of the double rotors are mutually counteracted, the cogging torque and the torque ripples are reduced, the operation condition of the motor is improved, and noise is reduced.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to an axial flux permanent magnet motor with unequal pole arc coefficients. Background technique [0002] Nowadays, permanent magnet motors have been widely used. From automobiles to aerospace, permanent magnet motors play a very important role. This is mainly due to several salient features of permanent magnet motors, including high torque Density, high efficiency, and small weight and volume. Although permanent magnet motors have a series of advantages, they still face many difficulties for demanding high-performance applications such as electric power steering systems, servo motors, wind turbines, and electric vehicle drive systems. These applications place high demands on the operational stability of the motor. The motor rotor is a mechanical structure that generates a magnetic field. In order to generate a magnetic field, the motor rotor can design windings on...

AI Technical Summary

Problems solved by technology

In the existing permanent magnet motor rotor structure, there are problems such as large motor torque fluctuations and large noise

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