Experimental Evaluation of a Zero-Voltage-Switched Quasi-Resonant Buck Converter

Abstract

In order to minimize the losses in high frequency converters such as the Quasi-Resonant (QR) Buck converter, the Zero Voltage Switching (ZVS) technique is used. Quasi-resonant Buck converters are implanted by adding reactive elements to conventional topologies, and the addition of an extra capacitor and inductor regarding the switch of a Buck converter. Such technologies nowadays are widely used as power supplies for certain battery chargers. A ZVS QR Buck converter is proposed in this paper. After having reminded the principle of operation of a classic ZVS QR Buck converter. Some simulations results are performed in SIMPLORER and ISIS soft-wares to validate the proposed ZVS QR Buck converter. Experimental results has been made on a laboratory prototype. Experimental results obtained on a laboratory prototype are presented to verify the.