A Hybrid-Switch-Based Soft-Switching Inverter for Ultrahigh-Efficiency Traction Motor Drives

作者：Lai Jih Sheng^*; Yu Wensong; Sun Pengwei; Leslie Scott; Arnet Beat; Smith Chris; Cogan Art

来源：IEEE Transactions on Industry Applications, 2014, 50(3): 1966-1973.

DOI：10.1109/TIA.2013.2284296

• Electric vehicles
• high efficiency
• hybrid switch
• motor drives
• soft-switching inverter

This paper presents a hybrid switch that parallels a power MOSFET and an insulated-gate bipolar transistor (IGBT) as the main switch of a zero-voltage switching (ZVS) inverter. The combination features the MOSFET conducting in the low-current region and the IGBT conducting in the high-current region, and the soft switching avoids the reverse recovery problem during the device turn-on. A custom hybrid switch module has been developed for a variable-timing-controlled coupled-magnetic-type ZVS inverter with a nominal input voltage of 325 V and the continuous output power of 30 kW for a traction motor drive. Experimental results of the hybrid-switch-based inverter with the total loss projected by temperature indicate that the inverter achieves 99% efficiency at the nominal condition and demonstrate ultrahigh-efficiency operation over a wide load range. At 375-V input, the maximum measured efficiency through temperature projection and loss separation analysis is 99.3%.

• 出版日期2014-6