Abstract
This paper presents bridgeless power factor correction circuits that achieve both high reliability and high efficiency. In electric equipments, using power factor correction (PFC) technology can in crease power factor, reduce harmonic pollution on grid and improve power utilization. Rectifier Bridge is commonly used to realize A C to DC conversion in PFC topology and PFC stage realizes power factor correction function. With power level's improving, the loss of bridge rectifier occupies a large proportion in the whole power stage loss. Bridgeless Boost PFC omits Rectifier Bridge by decreasing conduction loss and improves efficiency. This paper introduces the principle of operation including the control scheme and verified performance based on simulation and experimental results.
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