QRC provides efficient and regulated switch mode power supplies for robotic and satellite applications. This article addresses the enhanced controller techniques for high frequency isolation based push-pull Quasi Resonant Converter. This technique is similar to the conventional PI controller technique but varies only the enhancement constants to improve the time domain response of the converter. The proposed converter is designed for low output voltage and power rating, characteristically 5V and 5 W, with the comprehension of current design trends towards enhanced performance. At the primary stage, to validate the design of the converter, simulation is performed in PSIM for ±50% load variations. A prototype model of this converter is developed. The results obtained from the experimental set-up are presented, and analysed in detail. The results reveal the superiority of the proposed method.
Dr. K. Deepa, Jeyanthi, R., and M Kumar, V., “Analysis of a Quasi Resonant Switch Mode Power Supply for Low Voltage Applications”, International Journal on Electrical and Power Engineering, vol. 4, no. 2, pp. 85-92, 2013.