Patent ID: 7706161
Filing Date: 2010-04-27
Classification: H02M,H05B,Y02B

Abstract:
1. A single stage power factor corrected power converter for providing power to a load, comprising: a smoothing capacitor connected across first and second terminals of a source of DC voltage; a pair of switching devices connected in series across said first and second terminals of said source of DC voltage, an output line being connected to a junction of said pair of serially connected switching devices, there being a switching control associated with the switching devices for switching the switching devices to conduct alternatively between positive and negative ones of said first and second terminals of said source of DC voltage at a predetermined high frequency, there being a finite time between each of the switching during which both of said switching devices are in a non-conductive state; a resonant circuit having a first, second and third terminals and comprising a series connected resonant inductor and an AC blocking capacitor, said resonant circuit being connected at said first terminal to said output line and at said second terminal to said first and second terminals of said source of DC voltage; a load connected between said third terminal of said resonant circuit and one of said first and second terminals of said source of DC voltage; and a secondary power source, connected to said resonant circuit for providing an auxiliary source of power to said load near zero crossings of said AC voltage.