Analysis and implementation of active-clamping double-ended converter

A new active-clamping double-ended converter is presented to achieve the functions of switching loss reduction on semiconductors and less voltage stress on rectifier diodes. An active-clamping circuit is connected in parallel with the power switch to release the energy stored in transformer leakage and magnetising inductors such that the voltage stress on the main switch is limited. During the transition interval, the transformer leakage inductor and the output capacitor of power metal-oxide-semiconductor field-effect transistors are resonant to realise the zero voltage switching turn-on of all switches. Finally, experimental results for a 350 W interleaved active-clamping double-ended converter are presented to demonstrate the circuit performance and verify the feasibility of the proposed converter.