Research on eliminating parasitic oscillation of inverter by using PI and repetitive control

Abstract

During the operation of high frequency inverter, the square wave output of inverter has a large parasitic oscillation due to the influence of the parasitic capacitance and wiring inductance of the power field effect transistor. This paper analyzes the generation mechanism of parasitic oscillation of the field effect transistor and uses Matlab/Simulink for parasitic oscillation's simulation, then the parasitic oscillation is superimposed in the ideal model of the inverter. Finally, the elimination of spurious oscillation in inverter's square wave output is realized by using the method of combining PI control with repetitive control.