Title :
A development of the off-line active clamp ZVS forward converter for telecommunication applications
Author :
Park, D.H. ; Kim, H.J. ; Sun, Y.S.
Author_Institution :
Dept. of Electr. Eng., Hanyang Univ., Ansan, South Korea
Abstract :
In this paper, the development of the off-line active clamp zero-voltage-switching (ZVS) forward converter, which can be used for telecommunication applications, is discussed. The operation principles of the converter are described to identify the zero-voltage-switching characteristic at the switches. The design guidelines for zero-voltage-switching operation of the converter are gathered. For an experiment we have built a 200 W (48 V/4.2 A) off-line active clamp ZVS forward converter, in which the switching frequency is 400 kHz, and tested it. From the experiment it is verified that the zero-voltage-switching operation is successfully achieved and the voltage stress at the main switch is effectively clamped to minimum value in the converter. The maximum efficiency of 90% is measured at full load in the converter
Keywords :
power convertors; switching circuits; telecommunication power supplies; 200 W; 4.2 A; 400 kHz; 48 V; 90 percent; ZVS forward converter; full load; maximum efficiency; off-line active clamp; switching frequency; telecommunication applications; voltage stress; zero-voltage-switching; Clamps; Diodes; Magnetic resonance; Magnetic switching; Switched capacitor circuits; Switches; Switching circuits; Switching converters; Telecommunication switching; Zero voltage switching;
Conference_Titel :
Telecommunications Energy Conference, 1997. INTELEC 97., 19th International
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-3996-7
DOI :
10.1109/INTLEC.1997.645899
