Optimal resetting of the transformer's core in single ended forward converters
Single ended forward converter with resonant commutation of magnetizing current
Full-fluxed, single-ended DC converter
High frequency switched mode resonant commutation power supply
Fixed frequency single ended forward converter switching at zero voltage
Pulse width modulated DC/DC converter with reduced ripple current coponent stress and zero voltage switching capability
Zero-voltage switching power converter with ripple current cancellation
Power converter possessing zero-voltage switching and output isolation
Fixed frequency converter switching at zero voltage
ApplicationNo. 730684 filed on 10/11/1996
US Classes:363/21.06, Having synchronous rectifier363/16Having transistorized inverter
ExaminersPrimary: Wong, Peter S.
Assistant: Jardieu, Derek J.
Attorney, Agent or Firm
Foreign Patent References
International ClassH02M 003/335
AbstractA single ended forward DC-to-DC converter includes a transformer having a primary winding electrically connected to a primary switch and a secondary winding electrically connected to a secondary switch and a clamping capacitor. The clamping capacitor stores the magnetization energy from the secondary winding when the primary switch is turned off, thus causing the transformer core to be reset during the period that the primary switch remains off. The converter can use mosfets as the primary and secondary switches, such that a change in the voltage at the secondary winding of the transformer, due to the turning off of the primary switch, results in an automatic turning on of the secondary switch. The combination of the clamping capacitor and the mosfet switches increases the simplicity of the DC-to-DC converter while eliminating undesirable characteristics such as dead time and voltage stresses on the switches. The DC-to-DC converter of the present invention can be used to carry out synchronous rectification and zero voltage switching.