High efficiency converter

摘要

PCT No. PCT/AU88/00419 Sec. 371 Date Jun. 14, 1990 Sec. 102(e) Date Jun. 14, 1990 PCT Filed Oct. 28, 1988 PCT Pub. No. WO89/04082 PCT Pub. Date May 5, 1989.A high efficiency power conversion at high frequencies with zero voltage switching is obtained by using magnetizing current of a transformer or parallel inductance to charge the switch adjunct capacitance and other capacitance during the dead time. A transformer is prevented from being loaded during the dead time. Loading of the transformer during the dead time is prevented by directing the output inertial current to a capacitor instead of through the rectifiers to the secondary of the transformer. This can also be achieved by using synchronized rectification that provides pulse width modulated regulation on the output and ensures that the transformer secondary is separated from the inertial current of the output during the dead time. Voltage and current stresses on the switching devices and rectifiers are minimized. Zero voltage switching may be applied to inverters where the load is resistive.