Power Inverter Based Comparison of Torque Ripple Suppression in IPMSM with Concentrated Winding

Abstract

This study compares the characteristics of a PWM voltage source inverter (VSI) and PWM current source inverter (CSI) for an IPMSM drive system with concentrated winding. Past analysis showed that the PWM CSI had inferior operating characteristics compared with the PWM VSI. Thus, high-performance PM motor drive systems have been using a VSI for small-capacity applications. There has been almost no research addressing improvements in CSI motor drive systems. In this study, experiments were performed to compare the three-phase current and torque characteristics generated by VSIs and CSIs.