An Isolated Power Factor Corrected Power Supply Utilizing the\n Transformer Leakage Inductance

2018/08/20 by T. J. Conway, Conway, Thomas
Engineering · #Advanced DC-DC Converters #Induction Heating and Inverter Technology #Silicon Carbide Semiconductor Technologies

paper · pdf · doi:10.48550/arxiv.1808.06699

Abstract

The widespread use of electronic devices increases the need for compact power\nfactor corrected power supplies. This paper describes an isolated power factor\ncorrected power supply that utilizes the leakage inductance of the isolation\ntransformer to provide boost inductor functionality. The bulk capacitor is in\nthe isolated part of the power supply allowing for controlled startup without\ndedicated surge limiting components. A control method based on switch timing\nand input/output voltage measurements is developed to jointly achieve voltage\nregulation and input power factor control. A prototype design is implemented\nwith detailed measurements and waveforms shown to confirm the desired\nfunctionality.\n

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