Patent ID: 8422250
Filing Date: 2013-04-16
Classification: H02M,Y02B

Abstract:
1. A resonant converter for supplying electrical energy from a supply source to a load, the resonant converter comprising first and second series-arranged, controllable switches to be connected to the supply source, a control device for generating control signals for opening and closing the first and second switches, a resonant tank in electrical connection with the first and second switches, the resonant tank comprising a resonant capacitor, wherein one of the first and second switches is turned on, the current flowing in the resonant tank is monitored, or the voltage at a predetermined point in the resonant tank is monitored, and wherein the switch is turned off when a first criterion is fulfilled together with a second criterion or a third criterion, the first criterion ensuring a minimum time has lapsed after the switch is turned on, the second criterion being that the absolute value of the current is reaching a predetermined current level, the third criterion being that the voltage at the predetermined point reaches a predetermined voltage level.