Title :
ZVS PWM converter-utilizing partial resonance
Author :
Hiramatu, R. ; Norigoe, I. ; Hiki, H. ; Takeishi, S. ; Yoshioka, H. ; Arakawa, K. ; Kameyama, S.
Author_Institution :
Densetsu Corp., Tokyo, Japan
Abstract :
Fixed-frequency PWM (pulse-width modulation) zero-voltage switching (ZVS) conversion was realized by applying partial resonance to the forward converter. The advantages of this technique are less EMI (electromagnetic interference) and power dissipation in the switching transistor, the ability to utilize a conventional PWM control method, ease of suppression of the EMI influence due to fixed-frequency operation, and suppressed voltage-stress on the switching transistor. The hybrid converter has the advantages of both ZVS resonant and PWM converters. The converter achieves excellent efficiency: 86% at 5 V 20 A output, DC 48 V input. A wide input voltage range (18-60 DC, 85-265 V AC) and a high level of responsiveness are also achieved
Keywords :
circuit resonance; power convertors; pulse width modulation; switching; 18 to 60 V; 20 A; 48 V; 5 V; 85 to 265 V; EMI; PWM; efficiency; partial resonance; power convertors; suppressed voltage-stress; transistor; zero-voltage switching; Capacitance; Chromium; Clamps; Frequency control; Power dissipation; Pulse width modulation; Pulse width modulation converters; Resonance; Switches; Zero voltage switching;
Conference_Titel :
Telecommunications Energy Conference, 1989. INTELEC '89. Conference Proceedings., Eleventh International
Conference_Location :
Florence
DOI :
10.1109/INTLEC.1989.88346
