Novel hybrid excitation asynchronous starting permanent magnet synchronous motor stator and rotor structure

Abstract

The invention relates to a novel hybrid excitation asynchronous starting permanent magnet synchronous motor stator and rotor structure, and belongs to the technical field of motor structures. A motor body comprises a stator, a rotor magnetic pole, a damping bar, a magnetic isolation sleeve and a permanent magnet, and a 30-pole 108-slot motor structure with the stator arranged outside and the rotor arranged inside is adopted; the stator is composed of stator teeth and a stator yoke, the top of the teeth is provided with an adjustable magnet, the torque density of the motor can be increased, and the starting time of the motor is shortened. Rotor magnetic poles are circumferentially distributed on the inner side of the stator at equal intervals, four built-in permanent magnets are arranged among the magnetic poles, and a surface-mounted permanent magnet is arranged at the top of the rotor magnetic poles, so that the eddy current loss of the motor can be reduced, and the air gap flux density harmonic amplitude can be weakened; the bottoms of the magnetic poles are provided with rectangular notches, so that the tangential flux density of the motor is reduced, and the heat dissipation effect of the motor is improved.

Description

technical field [0001] The invention relates to the technical field of motor structures, in particular to a novel hybrid excitation asynchronous start permanent magnet synchronous motor stator and rotor structure. Background technique [0002] Asynchronous starting permanent magnet synchronous motor is to place permanent magnets in the iron core of three-phase induction motor, and rely on the asynchronous torque generated by the squirrel-cage rotor winding to realize the starting; compared with three-phase induction motors, the outstanding advantages of asynchronous starting permanent magnet synchronous motors are high Efficiency, high power factor and wider economic scope; my country is a big country of rare earths, and the output of rare earth permanent magnets ranks first in the world with rich rare earth resources, which has great advantages for vigorously developing permanent magnet synchronous motors. [0003] Permanent magnet synchronous motor can be divided into surfa...

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Problems solved by technology

[0003] Permanent magnet synchronous motors can be divided into surface mount type and built-in type according to their rotor structure. Surface mount type permanent magnet synchronous motors have relatively small torque ripple and relatively low power density, while built-in permanent magnet synchronous motors The torque is relatively large, but the built-in motor has a large magnetic flux leakage, the air-gap flux density of the motor is relatively poor, and the harmonic content is relatively high. Therefore, it is necessary to improve the structure of the existing asynchronous starter permanent magnet synchronous motor.

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