Decrease of power electronic switching losses using variable switching events

Abstract

The electric range of an electric vehicle depends amongst others on the efficiency of electric components. This paper focuses on the efficiency of the inverter in one-phase operation. A comparison of three different PWM patterns is presented concerning their efforts to minimize the switching losses of the inverter and reducing the distortion of produced phase current. For one-phase systems, we show that an appropriate switching strategy will decrease the switching losses by up to 33%. Furthermore, this strategy is able to reduce the distortion factor of phase current, as a quantity of signal quality, by up to 18%.