Component loss modelling in hard switched and resonant pole inverters

A three-fold comparison between two types of resonant pole inverter and the hard switched inverter is presented, based on loss modeling in the switching devices. It is shown that the resonant pole inverters can reduce the losses in the switches and diodes, compared to the hard switched inverter, by almost an order of magnitude depending on the type of device. It is pointed out that devices should be designed differently for resonant pole inverters. Since reverse recovery times in diodes and switching times of controllable devices are not directly related to switching losses, devices with less conduction loss can be used. The nonlinear resonant pole inverter displays lower loss, peak current stress, and RMS inductor current than the linear version.<>