Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1999-11-15
2000-10-31
Nguyen, Matthew
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 16, 363 20, H02M 3335
Patent
active
061412244
ABSTRACT:
A 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.
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Ma Fei
Xia Gang
International Power Devices, Inc.
Nguyen Matthew
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