A Non-Isolated Based Boost DC-DC Converter with VM Technique and Soft Switching Capability

In this work, a non-isolated based DC-DC converter with high voltage conversion ratio is presented that is appropriate candidate for high voltage gain application such as Photovoltaic (PV) systems. The proposed topology combines coupled inductor and voltage multiplier (VM) circuit. By selecting the proper turn’s ratio of the coupled inductor winding, the wider voltage gain can be achieved. The VM circuit is used for further enlarging the voltage gain and also acts as a clamp circuit which provide low voltage stress through the switch. In addition, a diode has zero current switching (ZCS) condition in OFF-state which is main feature of the suggested structure. The proposed converter has used a single power MOSFET with less ON state resistance value. Hence, the control of the proposed topology will be simple and the conduction losses will be reduced by using only active switch with lower resistance. The operation principle, theoretical analysis and comparison study are accomplished in this study. Eventually, In order to ensure the proficiency of the presented structure, the experimental consequences with 25 kHz switching frequency is provided.