Title :
Zero-current-switched quasiresonant converters with one additional fully regulated output
Author :
Sebastian, J. ; Uceda, J. ; Blanco, J. ; Lumbreras, A. ; Aldana, F.
Author_Institution :
Div. de Ingenieria Electron., Univ. Politecnica de Madrid, Spain
Abstract :
A solution is proposed in order to obtain an additional fully regulated output in zero-current-switched quasi-resonant converters (ZCS-QRCs). The solution consists of connecting a low-power pulsewidth-modulation (PWM) topology to the resonant switch and modulating the duty cycle (besides the switching frequency) in the power transistor. The PWM topology must have a transformer or a tapped-inductor to overcome a constraint between the output voltage gain in both outputs. The converter obtained has nonzero-current switching, but the increase in switching losses is very small if the power handled by the new output is much smaller than that delivered by the main output
Keywords :
power convertors; pulse width modulation; switching; PWM topology; additional fully regulated output; low-power pulsewidth-modulation; output voltage gain; power transistor; switching losses; tapped-inductor; transformer; zero-current-switched quasi-resonant converters; Joining processes; Power transistors; Pulse transformers; Pulse width modulation; Resonance; Space vector pulse width modulation; Switches; Switching converters; Switching frequency; Topology;
Conference_Titel :
Industrial Electronics Society, 1990. IECON '90., 16th Annual Conference of IEEE
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-87942-600-4
DOI :
10.1109/IECON.1990.149253
