Bidirectional active clamp DC–DC converter with high conversion ratio

A bidirectional DC/DC converter is presented with the advantages of high conversion ratio in boost and buck mode, low conduction loss, recycling the energy of leakage inductor, and zero-voltage switching (ZVS) in some switches. This new topology can realise a higher step-up voltage gain by the using of a coupled inductor. Then an active clamp circuit was applied to reduce conduction loss and recycle the energy of the leakage inductor. The soft-switching technique is applied to achieve ZVS turn-on. The main circuit of the DC–DC converter is analysed in detail and the performance of the proposed converter is verified by the experimental verifications with a 200 W prototype.