A simplified functional simulation model for three-phase voltage-source inverter using switching function concept

In this paper, a functional simulation model for the voltage-source inverter (VSI) using the switching function concept is studied and the actual implementation of the model is proposed with the help of Matlab Simulink. Also, this concept is extended to the voltage-doubler-type pulsewidth-modulated (PWM) ac-dc rectifier and the PWM Ac-dc-ac converter. With the developed functional model, the simplification of the static power circuits can be achieved so that the convergence and long run-time problems can be solved. Also, in the functional model, the design parameters, such as voltage and current ratings of the power semiconductor switches and load current, can be easily calculated. The general switching function concept is reviewed in brief and the proposed functional models for the VSI, voltage-doubler rectifier, and PWM ac-dc-ac converter and their implementations using Matlab Simulink are explained in detail. Also, several informative simulation results verify the validity of the proposed models.