Patent ID: 6856119
Filing Date: 2005-02-15
Classification: H02M,Y02B

Abstract:
1. A power factor corrected capacitor charger comprising: a full wave bridge rectifier receiving AC mains power and providing a full-wave rectified DC waveform on a power line and a return line; a first switch having a first pole and a second pole; a second switch having a first pole and a second pole; a third switch having a first pole and a second pole; a fourth switch having a first pole and a second pole; a first diode having an anode and a cathode; a capacitor having a first pole and a second pole; an inductor; a transformer comprising a primary winding and a secondary winding, the secondary winding powering a load; wherein: the first pole of the first switch is connected to the cathode of the first diode and to the first pole of the capacitor; the second pole of the capacitor is connected to the return line: the second pole of the first switch is connected to the first pole of the fourth switch and to a first end of the inductor; a second end of the inductor is connected to a first end of the primary winding of the transformer; the second pole of the fourth switch is connected to the return line; the first pole of the second switch is connected to the power line; the second pole of the second switch is connected to the first pole of the third switch and to a second end of the primary winding of the transformer.