A new soft switching coupled inductor half bridge current fed converter

In this paper a new zero voltage switching current-fed half bridge converter with an active clamp circuit is proposed. The active clamp circuit not only absorbs the voltage surge across switches at turn off instance due to leakage inductance, but also provides soft switching condition for all the semiconductor elements. Implementation of control circuit is very simple since the converter is PWM controlled and the auxiliary switches turn on are complementary with respect to main switches. In the proposed converter, two coupled inductor are applied in conventional half bridge current fed converter for increasing converter gain. The simulation results are presented to verify the converter operation.