LC共振による新しい回路トポロジーを有するPFC高力率コンバータの展開

概要

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For small capacity rectifier circuits such as those for consumer electronics and appliances, capacitor input type rectifier circuits are generally used. Consequently, various harmonics generated within the power system become a serious problem. Various studies of this effect have been presented so far. However, most of these employ switching devices, such as FETs and the like. The absence of switching devices makes systems more tolerant to over-load, and brings low radio noise benefits. The author proposes a power factor correction scheme using a LC resonant in commercial frequency without switching devices. In this method, It makes a sinusoidal wave is made by widening conduction period using the current resonance. Hence, the harmonic characteristics can be significantly improved, where the lower order harmonics, such as the fifth and seventh orders are much reduced. The circuit topology can be easily applied to like dc high voltage generators. The results are confirmed by the theoretical and experimental implementations.
中部大学の論文