LOSELESS POWER FACTOR CORRECTION CIRCUIT

摘要

A loss-free power factor improvement circuit is provided, which can reduce the reverse recovery current by charging through the resonance of the capacitor within the leakage inductance of the coil combined with the boost inductor and snubber. The rectified input voltage is input in one end of the boost inductor and the boost inductor forms the first coil. The switch(Q) is connected between the other end of the boost inductor and ground. One end of the snubber inductor(Ls) is connected to the other end of the boost inductor. The anode of the main part diode(Do) is connected to the other end of the snubber inductor. The anode of the first secondary diode(dc1) is connected to the other end of the boost inductor. The capacitor(Cr) is connected between the anode of the main part diode and anode of the second subsidiary diode. One end of the second coil(Ns) is connected to the other end of the snubber inductor.