Optimized design of a complete three-phase PWM-VS inverter

Abstract

This paper defines optimized design of power electronic circuits and uses the concept of a complete three-phase inverter. The optimization is done in order to obtain maximum efficiency by changing the gate-drive conditions like gate-resistances and gate-drive supply. Another optimization is done where the thermal behaviour of the diode and the IGBT is taken into account. A loss model of a complete three-phase inverter is developed, and simulation results show that different optimization points can be calculated and used for a design. Based on known data for the IGBTs and the diodes, the inverter circuit, the outputs of the optimizer are two gate-drive resistances, a gate-drive supply, and a load current which give the inverter the highest efficiency. It is concluded the optimization points of the inverter design are different when the optimization criteria change. The highest load current is found for the inverter when the thermal effects are included.