Influences of Inverter Modulation on Permanent Magnet Synchronous Motor Characteristics

Abstract

This paper describes the influence of the PWM inverter harmonic loss and vibration on the concentrated winding interior permanent magnet synchronous motor (IPMSM) characteristics by using a finite element method (FEM) analysis and several measurements. The PWM inverter harmonic mainly caused an increase of eddy current losses in the magnetic steel sheet and the permanent magnet. In addition, the IPMSM with the two-phase modulation inverter has a higher radial electromagnetic force than the IPMSM with the third-harmonic-injection modulation inverter.