Influence of Low-frequency Harmonic Currents on Radial Electromagnetic Force of PMSM

This paper studies the influence of low-frequency harmonic currents on the radial electromagnetic force of permanent magnet synchronous motors (PMSM). The finite element method (FEM) is used to deal with the additional influence on the radial electromagnetic force caused by the harmonic current. Analyze the ideal sinusoidal fundamental current as a reference. Taking a 48-slot 8-pole interior permanent magnet synchronous motor as an example, the radial electromagnetic force model of a permanent magnet synchronous motor with harmonic current phase parameters is derived. The electromagnetic force results under different current harmonic conditions are discussed, and fast Fourier transform (FFT) is performed. The results show that low-frequency current harmonics have an influence on the radial electromagnetic force, and its influence depends on the phase and amplitude of the harmonic current.