LOAD-RESONANT CONVERTER WITH ZERO CURRENT SWITCHING AND VARIABLE OUTPUT POWER

The authors present a half-bridge series-parallel load-resonant conver ter in which the resonant circuit has been designed so that the circui t can operate near to resonance over a wide frequency range. The outpu t power of the circuit varies continuously over this frequency range, resulting in a load-resonant converter with zero current soft-switchin g over a range of output power. The prototype constructed shows a powe r variation of 2:1 over a frequency range of 30kHz.