Patent ID: 7443705

Claim:
A power converting apparatus comprising: a rectifying circuit having a pair of AC power input terminals and a pair of rectified voltage output terminals; an inductor; and a charging and discharging circuit connected between said rectified voltage output terminals, wherein said charging and discharging circuit comprises: a first charging and discharging circuit connected with one of said rectified voltage output terminals and one of said AC power input terminals; and a second charging and discharging circuit connected with the other of said rectified voltage output terminals and said one AC power input terminal, said first charging and discharging circuit comprises a first diode and a first capacitor connected with said first diode in series, said second charging and discharging circuit comprises a second diode and a second capacitor connected with said second diode in series, and said charging and discharging circuit further comprises: a switch section connected in parallel with a series connection of said first and second diodes, said inductor generates a resonance current together with said first capacitor and said second capacitor, and said second capacitor discharges to zero voltage while said first capacitor is charged.