SiC Inverter Induction Motor Drive for Automotive Powertrains

The paper is part of an ongoing research on a SiC inverter - induction machine power train system. It presents details on inverter execution and its important challenges and then introduces an improved indirect field-oriented control. IFOC, with proportional-integral (PI) and super-twisting sliding mode, STSM, speed and current controller is illustrated in digital simulations of typical vehicle acceleration profile, with validation in preliminary experiments. Phase voltage reconstruction was also proposed to consider the nonlinearity introduced by overmodulation in motor voltage. The phase voltage reconstruction was tested experimentally and then it was used in the digital simulations to consider the inverter nonlinearity.