Title :
Zero-voltage-switching realized by magnetizing current of transformer in push-pull current-fed DC-DC converter
Author :
Shoyama, Masahito ; Harada, Koosuke
Author_Institution :
Dept. of Electron., Kyushu Univ., Fukuoka, Japan
Abstract :
A new type of zero-voltage-switched (ZVS) push-pull current-fed DC-DC converter with two synchronous rectifiers in the secondary circuit is presented. ZVS is realized using the magnetizing current of the transformer as a constant current source during the commutation. The output voltage is controlled by PWM (pulse-width modulation) with a constant switching frequency. The circuit operation is described using equivalent circuits. The steady-state and dynamic characteristics are analyzed and confirmed experimentally
Keywords :
DC-DC power convertors; PWM power convertors; commutation; equivalent circuits; magnetisation; rectifiers; rectifying circuits; switching circuits; transformers; voltage control; PWM; circuit operation; commutation; constant current source; constant switching frequency; dynamic characteristics; equivalent circuits; magnetizing current; output voltage control; pulse-width modulation; push-pull current-fed DC-DC converter; secondary circuit; steady state characteristics; synchronous rectifiers; transformer; zero voltage switching; DC-DC power converters; Equivalent circuits; Pulse transformers; Pulse width modulation; Rectifiers; Space vector pulse width modulation; Steady-state; Switching frequency; Voltage control; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 1993. PESC '93 Record., 24th Annual IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-1243-0
DOI :
10.1109/PESC.1993.471921
