Analytical approach towards quantitative electrical loss analysis of dual three-phase permanent magnet synchronous motors

Understanding the significance of efficiency improvement in an electric vehicle drivetrain system and the prospects of multi-phase electric motors, this paper discusses research findings elicited through a comparative performance analysis performed on commercially available in-vehicle conventional three-phase permanent magnet motor and modified dual stator winding permanent magnet motor derived from the conventional three-phase machine. Various electrical losses in both the machines have been estimated and compared through developed mathematical approach using analytical equations. The study performed here is exclusive to estimate the electrical losses in a multi-phase permanent magnet machine and provide decision points on various structural design indices of the machine before venturing into the FEA based machine design and assessment.