Closed loop control of full bridge converter with asymmetric PWM

Abstract

This paper introduces a full bridge converter with high step-up voltage gain, which is achieved by using asymmetric pulse width modulation. The soft switching is obtained for the converter with zero-voltage switching across the active switches and the zero-current switching across the output diodes. The zero-voltage switching of the active switches are obtained during turn-on and the zero-current switching of the output diodes are obtained during turn-off. The converter is able to achieve high step-up voltage gain by using relatively less transformer turns ratio. Various simulation results using MATLAB SIMULINK is provided to understand the effectiveness of the circuit.