Patent ID: 6728119
Filing Date: 2004-04-27
Classification: H02J,H02M,Y02B

Abstract:
An inverter that receives DC power and provides AC power having an AC voltage level to a load having a capacitive element, the inverter comprising:first and second output nodes to provide AC power to the load having the capacitive element; first and second input nodes to receive DC power from a DC voltage source; a resonant element having a first terminal and a second terminal, the second terminal being electrically coupled to the first output node; a first switch electrically coupled between the first terminal of the resonant element and the first input node, wherein during a first time period, the first switch is selected to enable an electrical current path from the resonant element to the capacitive element, an electrical current of the path storing energy in the resonant element and charging the capacitive element to a first voltage level, and during a second time period, the first switch is selected to block the electrical current path to cause the stored energy in the resonant element to further charge the capacitive element to a second voltage level during the second time period; and a set of switches operatively coupled between the first and second output nodes and the first and second input nodes and controlled to generate AC power from the DC power.