750 V IGBTs for Mild Hybrid Vehicles

摘要

In mild hybrid cars, 600 V IGBT (insulated gate bipolar transistor) modules have often been used. Recently, however, in order to improve fuel efficiency and acceleration performance further, there has been growing demand for higher system voltages. In response to this demand, Fuji Electric has developed a 750 V IGBT and FWD (free wheeling diode) chip, and an IGBT module. A prototype of the module was evaluated and the following results were obtained. The module can be used safely with systems having power supply voltages of up to 500 V even when surge voltage is superimposed. When the 750 V IGBT is utilized, total loss can be decreased by approximately 28% compared to 1,200 V devices.