Power factor correction using a series active filter

This paper present a low-cost approach to power factor correction (PFC) for single-phase diode rectifiers using a series active filter. Comparing with the traditional PFC, the proposed PFC has lower requirements of power device ratings, which leads to lower cost and higher efficiency, and it also can eliminate the bulky inductor needed in the traditional PFC. The paper analyzes the topology, operation, and application issues of the proposed PFC. The control strategy is discussed and simulation results are provided. A 1 kW prototype is built up and the experimental results are presented to verify the analysis.