ABSTRACT
The input to a resonant inverter is a DC voltage or current source, and the output is a voltage or current resonant pulse. Power semiconductor devices perform the switching action, and the desired output is obtained by varying their turn-on and turn-off times. The commonly used devices are BJTs, MOSFETs, IGBTs, MCTs, GTOs, and SCRs. The switches of resonant inverters are turned on to initiate resonant oscillations in an underdamped RLC circuit and are maintained in an on-state condition to complete the oscillations. The output waveform depends mainly on the circuit parameters and the input source. The on time and switching frequency of power devices must match the resonant frequency of the circuit. A power device of a zero-voltage switching converter is turned on when its voltage becomes zero because of the resonant oscillation.
