Optimization method for waveform quality of permanent magnet synchronous motor for electric vehicles
ZHANG Bing-yi
ZHANG Xiao-ting
JIANG Shan-shan
Abstract：In order to improve the quality of electric vehicles and control the vibration and noise of permanent magnet synchronous motor, a new optimization method for air gap flux density waveform was proposed on the basis of the study on the relationship between both no-load air gap flux density waveform and rotor magnetic body structure of built-in permanent magnet synchronous motor. The distribution of flux density in space for a single magnetic pole was inhomogeneous under the uniform air gap. A novel"M-shape" rotor structure was designed, a finite-element analytical model for the permanent magnet synchronous motor with "M-shape" rotor structure was established, and the finite-element analysis was carried out. The results show that the air gap flux density waveform of"M-shape" rotor structure is close to the sine wave, the harmonic wave content of each component in the space of air gap flux density obviously reduces, the sinusoidal distortion rate of air gap flux density waveform also decreases, and the harmonic wave gets effectively suppressed.
Keywords：electric vehiclepermanent magnet motorvibration and noiseair gap flux densityinhomogeneous distributionoptimization of waveform qualityrotor structurefinite element analysis
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 481-485 )