NON-ISOLATED SOFT SWITCHING DC-DC CONVERTER AND LOAD AT FULL RANGE OF ZVS

A non isolated soft switching DC?DC converter and load at full range of zero-voltage switching (ZVS) characteristic is proposed. The proposed converter consists of an auxiliary circuit, an inductor, two switches, and 2 diodes to achieving high efficiency at full range of load. At low and heavy loads, ZVS of switching device is achieved by energy storing component. The inductor energy stored varies with load and hence results in minimizes conduction loss. This leads to switching of device for full range of load. The proposed DC - DC converter achieves high efficiency as switching loss is reduced due to soft switching and ZVS operation which severe to reduce conduction loss. The efficiency is improved about 4% in boost mode (2.5% in buck mode) at full range of load. To verify the performance of the proposed converter, experimental results prototype are presented.