Parasitic Effect Compensation Method for IGBT ON-State Voltage Measurement in Traction Inverter Application

This letter proposes a novel compensation method to eliminate the impact of parasitic inductances on the measurement accuracy of on-state voltage of power semiconductor devices in operating converters. It is an online and noninvasive method by measuring the output current of inverter and on-state voltage of power device only. The impact of parasitic inductances and its compensation are verified experimentally through a traction inverter system.