Analysis of cogging torque of permanent magnet synchronous motor with different pole slots
DOI:
https://doi.org/10.54097/hset.v32i.4937Keywords:
Permanent magnet synchronous motor, Radial force wave, Vibration, Noise.Abstract
Using Maxwell finite element analysis software, the harmonic contents of no-load magnetic field and load magnetic field of three permanent magnet synchronous motors with 8 poles, 24 slots, 36 slots and 48 slots are calculated, and the radial force wave analysis is carried out. The influence of chute on cogging torque of integer slot motor and the influence of different pole arc coefficients and eccentricity of magnetic steel on sinusoidal distortion rate of magnetic field are analyzed. The analysis and calculation results show that, compared with fractional slot motor, the radial electromagnetic force and cogging torque of integral slot motor can be reduced more effectively by selecting the inclined slot and the appropriate magnetic steel shape, which provides a theoretical basis for reducing the vibration and noise of permanent magnet synchronous motor.
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