A PWM switch model of isolated full-bridge converter

Abstract

The PWM switch method has been used to investigate the effect of the transformer leakage inductance on the small-signal model in an isolated full-bridge converter. In this paper, a PWM switch model of full-bridge converter works in continuous current conduction mode has been derived, and the leakage inductance can be expressed as a resistance in model. Under the different load and different leakage inductance conditions, the proposed model can correctly show the system characteristics in frequency domain.