3-Phase High Gain PFC Converter Implementing Switched Capacitors

In this paper a novel topology of three phase Power Factor Correction (PFC) implementing switched capacitor (SC) is proposed. This converter comprises of separate switched capacitor cell for each phase. This converter has single switch per phase, transformer less but attains high static gain with switched capacitor cells, attains good power factor, reduces total harmonic distortion (THD) and each switch is subjected to a voltage stress equal to half the output voltage. In this converter all the active components are subjected to voltage stress equal to half of the output voltage. The rectifier input of pole voltage has three level voltages. Dynamic resonant perturbation (DPR) method is employed to stabilize the sub harmonics and to attain the unity power factor and low harmonic distortion. This paper presents circuit topology, its operation and control for the proposed three phase PFC converter. Simulation studies have been performed to ascertain the operation of the converter.