Comparison of the influence of PM drive system with voltage adaptation or machine winding reconfiguration on HEV/EV applications

This paper examines the performance benefits of four IPM drive system configurations for HEV/EV applications with the following features for controlling the machine voltage: 1) boosted inverter, 2) Y/Δ, 3) series/parallel (S/P) and 4) tapped reconfigurable windings. The four systems are modeled and their impact on drive system performance is investigated. Additionally, comparisons in terms of flux weakening capability, torque, output power, losses, number of machine winding leads and number of added components are studied in detail. Detailed set of simulation and experiments results were used for assessing the performance benefits. The trade-off study shows that the drive system with tapped reconfigurable winding results in the favorable cost/benefit ratio with similar inverter voltage/current limits.