CURRENT-FED,FORWARD CONVERTER SWITCHING AT ZERO CURRENT

摘要

A single-ended, zero-current switching, forward converter circuit converts power from a current source to a voltage load in a succession of energy transfer cycles using a transformer constructed to have an effective leakage inductance L1e, a capacitor (C) in series with the primary winding of the transformer, a switching device also in series with the primary winding, a unidirectional conducting device connected in series with the secondary winding in an orientation to conduct when the switching device is conducting, and a controller that selectively closes and opens the switching device to transfer energy from the capacitor via the effective primary leakage inductance to the load during an energy transfer cycle having a characteristic time scale determined by L1e and C.