Title :
Design and control of a full-wave, quasi-resonant flyback converter
Author :
Ridley, R.B. ; Lotfi, A. ; Vorperian, V. ; Lee, F.C.
Author_Institution :
Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
A full-wave zero-voltage switching quasiresonant converter flyback converter with a novel multiloop control was built which operates over the range of input voltage and load of a typical distributed-system power supply. The maximum converter frequency of 880 kHz is shown to be close to the practical limit for this specific application. Reasonable full-load efficiency is achieved, and the predicted losses agree with actual circuit measurements. The multiloop control scheme provides noise-immune and stable control over the full operating range of the converter. Design guidelines for the control are given, and it is shown theoretical and measured small-signal performance are in agreement. Performance and stress predictions are also very close to measurements
Keywords :
power convertors; 880 kHz; design; distributed-system power supply; full-load efficiency; full-wave zero-voltage switching; losses; multiloop control; quasi-resonant flyback converter; small-signal performance; stress predictions; DC-DC power converters; Forward contracts; Power measurement; Power supplies; Stress; Switches; Switching converters; Topology; Voltage; Zero current switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1988. APEC '88. Conference Proceedings 1988., Third Annual IEEE
Conference_Location :
New Orleans, LA
DOI :
10.1109/APEC.1988.10549
