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A novel power-factor-correction circuit with high-frequency resonant energy tank for DC-link inverter

A novel approach of power factor correction (PFC) with a high-frequency resonant energy tank for the DC-link inverter is proposed. As compared with the conventional PFC techniques, this approach is advantageous of lower current stress, lower switching losses, and higher control flexibility. With carefully designed circuit parameters, the proposed topology can exhibit high power factor. The adopted PFC circuit is implemented on a series-parallel load resonant inverter as an illustrative example. The experimental results are provided to validate the theoretical analyses. It is proven that the PFC circuit can achieve nearly unity power factor and very low harmonic distortion