Analytical Approach of Sideband Electromagnetic Vibration of PMSM Driven by Voltage Source Inverter With SVPWM Strategy

The research on the characteristics of sideband harmonic currents would provide guidance for the electromagnetic force wave, vibration, and acoustic noise of the motor. In this paper, the main components of sideband harmonic currents in a PMSM driven by the SVPWM strategy are analytically derived. An experimental test of an 8-pole/48-slot interior PMSM fed by a voltage source inverter with SVPWM is carried out, and the phase stator currents, vibration response, and acoustic noise signals are collected. The results verify the accuracy of the derivation analysis of sideband currents and indicate the relationship between sideband harmonic currents and electromagnetic vibration, providing a reference for further studies on vibration suppression.