Abstract: A high frequency resonant apparatus is described that includes a closed loop resonant series circuit including a capacitor, an inductor, a load, and a switching device with an anti-parallel diode. An energy source is coupled to the closed loop series circuit. The high frequency resonant apparatus also includes a controller for turning on the switching device for a time longer than one cycle of the closed loop resonant series circuit.

Abstract: A high frequency resonant apparatus is described that includes a closed loop resonant series circuit including a capacitor, an inductor, a load, and a switching device with an anti-parallel diode. An energy source is coupled to the closed loop series circuit. The high frequency resonant apparatus also includes a controller for turning on the switching device for a time longer than one cycle of the closed loop resonant series circuit.

Abstract: Embodiments of the invention provide methods and apparatuses for concurrently eliminating or substantially reducing two or more switching losses in an inverter switching circuit. Embodiments of the invention concurrently reduce multiple types of switching losses under hard switching mode and soft switching mode for active switching devices and diodes. In one embodiment of the invention, the voltage across a switching device is substantially reduced during switch turn-off and/or turn-on time, and also maintained at a substantially reduced level throughout some or all of the tail current loss time of the switching device. Other methods and apparatuses are also described.