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

fYear

1997

fDate

19-23 Oct 1997

Firstpage

271

Lastpage

276

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 1997. INTELEC 97., 19th International

Conference_Location

Melbourne, Vic.

Print_ISBN

0-7803-3996-7

Type

conf

DOI

10.1109/INTLEC.1997.645899

Filename

645899