A novel inductor-link open H-bridge topology-based ZCS-PWM bidirectional DC-DC converter for non-inverting multi-mode voltage regulations

This paper presents a novel zero current soft-switching (ZCS) pulse width modulation (PWM) bidirectional dc-dc converter (BDC) under the high frequency(HF) switching condition. In the proposed soft-switching BDC, all the power devices operate by ZCS commutation modes with aid of the edge-resonant switching cells, whereby the switching power losses can be minimized. The buck and boost voltage regulation without the polarity inverting is the prominent advantage and unique feature of the proposed soft-switching BDC. The converter performances including the soft-switching operations and output power regulation characteristics are demonstrated in experiment with a 500 W-50 kHz prototype, then its effectiveness is evaluated from a practical point of view.