Performance Prediction of a Dual Inverter Open Winding IPMSM Drive Considering Machine's Saturation and Losses

Abstract

In this paper, the effects of core saturation and machine's losses are considered to predict the performance of a conventional single inverter and a dual inverter open winding Interior Permanent Magnet Synchronous Motor (IPMSM) drive in Maximum Torque per Ampere (MTPA) and Field Weakening (FW) regions using Finite Element Analysis (FEA). It is shown how core saturation, which is a direct function of machine's loading, affects the d- and q-axis inductances and saliency ratio, and the losses including core, solid (due to skin and proximity effects), and mechanical losses significantly change in various operating points and may affect the operating capability of the machine in different drive configurations.