This paper deals with a simple and practical power loss analysis simulator, which can actually estimate the total power losses of three phase voltage-fed Auxiliary resonant commutation pole snubber assisted soft switching inverter as well as hard-switching inverter. In order to estimate the switching power losses and conduction power losses of switching semiconductor power devices (IGBTs), which are incorporated into the inverters, the proposed practical simulator is making use of feasible switching power loss data tables and conduction power loss data tables, which are accumulated from the measured voltage and current operating waveforms of power semiconductor switching devices. The practical effectiveness of feasible simulation technique and power loss evaluations for power electronic conversion circuits and systems are confirmed by the simulation and experimental results basis under the conditions of soft switching and hard switching sinusoidal PWM schemes.

This paper describes an efficient simulation approach of a DSP controlled series-parallel resonant high frequency DC-DC power converter system. Proposed power conversion circuit simulation approach is based on a circuit equation, modeled by substituting time-varying switched resistor circuit in place of all the controllable and uncontrollable power semiconductor switching blocks of power converter circuits. An algebraic algorithm transforms the matrices of the circuit equation into the matrices of the state vector equation. Solution of state equation is by 3rd order Runge Kutta numerical integration method. Simulation results are illustrated and discussed together with experimental results.