Variation of IGBT switching energy loss with device current: An experimental investigation

Aim of this paper is to study the variations in turn-on and turn-off switching energy losses in the IGBTs with device current at different DC link voltages and junction temperatures. The IGBT switching characteristics are obtained experimentally at various operating conditions, and turn-on and turn-off switching energy losses are determined. The relationship between the switching energy losses and the device currents are presented in mathematical form, which are derived from experimental data. Finally, a comparison has been made between calculated switching energy loss from linearized loss model and the derived expression from actual measured loss.