Analysis and Comparison of Harmonic Frequency Coupled of Six-phase Permanent Magnet Synchronous Motor

Torque ripple modeling of six-phase permanent magnet synchronous motor is the basis for studying the torque ripple problem of six-phase permanent magnet synchronous motor. Firstly, the analytical model of six-phase permanent magnet synchronous motor based on incremental inductance is used to analyze the harmonics in the lumped parameters, and the harmonic frequency coupled equation under nonlinear conditions is derived, and the coupled inductance matrix is introduced. Through the coupled equation, the coupled relationship between each harmonic can be intuitively reflected. Finally, the accuracy of the coupled equation is compared by the finite element method, and the Torque-Current frequency coupled equations of the symmetrical six-phase motor and the asymmetrical six-phase motor are compared.