Patent ID: 8331115

Claim:
A power system for providing power to a load, comprising: a rectifier configured to rectify an AC signal to produce a rectified signal; a zero cross detector configured to receive the AC signal and to detect when the AC signal equals zero; a switching device having (i) a first terminal connected to a first node, wherein a first output terminal of the rectifier is also connected to the first node and (ii) a second terminal connected to a second node; a tank circuit having (i) a first terminal connected to a third node, wherein a second output terminal of the rectifier is also connected to the third node and (ii) a second terminal connected to the second node; a voltage detector operable to monitor the voltage across the switching device or a current detector operable to monitor the current flowing through the switching device; and a controller in communication with the current and/or voltage detector and in communication with the zero cross detector and configured to change the state of the switching device based on, at least in part, information received from the zero cross detector and the current and/or voltage detector.