A high-voltage Parallel Resonant Converter with single capacitor as an output filter

Abstract

One of the major drawbacks of high-ratio step-up transformers is the high value of their secondary side capacitor. This value is reflected at the primary side giving rise to a non-desirable one. There are some converters [1][2][3] which include this capacitor in the topology and can cope with it, and even more, they need it. Particularly, in high-voltage applications, we will find transformers with a large capacitance value, since they use high-ratio step-up transformers. In this kind of applications, it is always interesting not to have inductors at the output filter, with single-capacitor filters being preferred instead. Thus, one the simplest topologies, is the Parallel Resonant Converter (PRC) with single capacitor output filter. It can be controlled by switching frequency and/or duty cycle, and makes feasible to have ZVS (Zero Voltage Switching) in the power switches. In this paper, the PRC modelling and design, plus experimental results are shown in a prototype delivering 3.5 kV, 260 W.

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Cite this paper

@article{Diaz2009AHP, title={A high-voltage Parallel Resonant Converter with single capacitor as an output filter}, author={J. Diaz and J. A. Martin-Ramos and Alberto Mart{\'i}n-Pernia and J. A. Martinez and P. Villegas}, journal={2009 13th European Conference on Power Electronics and Applications}, year={2009}, pages={1-10} }