Title :
A very simple method to obtain one additional fully regulated output in zero-current-switched quasiresonant converters
Author :
Sebastián, J. ; Uceda, J. ; Pérez, M.A. ; Rico, M. ; Aldana, F.
Author_Institution :
Div. de Ingenieria, Electron., Univ. Politecnica de Madrid, Spain
Abstract :
A novel solution to the problem of obtaining an additional fully regulated output in zero current-switched quasi-resonant power converters (ZCS-QRCs) is presented. The solution consists of connecting low-power PWM (pulse width modulation) topology to the resonant switch and modulating the duty cycle (in addition to 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 a nonzero-current-switching, but the increase in switching losses is very small if the power handled by the new output is much smaller than the one delivered by the main output.<>
Keywords :
power convertors; power transistors; pulse width modulation; switching; PWM; output voltage gain; power transistor; resonant switch; switching losses; tapped-inductor; transformer; zero current-switched quasi-resonant power converters; Joining processes; Power transistors; Pulse transformers; Pulse width modulation; Resonance; Space vector pulse width modulation; Switches; Switching converters; Switching frequency; Topology;
Conference_Titel :
Power Electronics Specialists Conference, 1990. PESC '90 Record., 21st Annual IEEE
Conference_Location :
San Antonio, TX, USA
DOI :
10.1109/PESC.1990.131234
