Controller Design of the Series Resonant Converter for Reducing Output Voltage Ripple

출력 전압 맥동감소를 위한 직렬공진형 변환기의 제어기 설계

A small-signal low-frequency disturbance of the input line affects the regulated-output voltage of the series resonant converter. To mitigate the detrimental effect, the output feedback PI-controller is employed. Small-signal linear models are represented to characterize the closed loop series resonant converter system. Design equations for the PI-controller which satisfy stability and percent ripple conditions are derived from the closed-loop linear model. Experimental results are presented which show excellent correlation with theory.