Single-stage single-phase parallel power factor correction scheme

A new scheme of the single-phase parallel power factor correction (PPFC), which allows major input power to be processed only once to achieve both unity power factor and tight output regulation, is established in this paper. The new PPFC circuits based on this new scheme are much simpler than the previous one. Consequently, they are competitive to the conventional two-cascade-stage system concerning the efficiency and the cost. Large signal simulation and experimental results have proven the successful operation and good performances of the proposed new PPFC circuits