Parallel connection of single-switch three-phase power-factor correction converters for interleaved switching

Francis Robinson, Viboon Chunkag

OAI: oai:purehost.bath.ac.uk:publications/a423150c-9c8d-4855-83ed-f77d42e3c748 • DOI: https://doi.org/10.1049/ip-epa:19971208

A circuit for the parallel connection of multiple high-frequency three-phase power-factor-correction converters is proposed which enables their input and output current ripple to be interleaved. Such interleaved operation substantially improves the composite power factor, line-current ripple and output-voltage ripple. The improvement is investigated by developing solutions to circuit state equations which allow the high-frequency content of the line current, as well as the low-order line-frequency harmonics, to be computed. Conclusions drawn from the computed results are verified experimentally using a 1 kW, two-stage, interleaved converter