Three phase power factor corrected isolated buck for 48 V/100 A rectifier with secondary active clamp

Author

Sheehy, Robert ; Dekter, Jurien ; Machin, Nigel

Author_Institution

Rectifier Technol., Melbourne, Vic., Australia

fYear

2002

fDate

2002

Firstpage

101

Lastpage

106

Abstract

A novel active clamp circuit for the secondary diodes of an isolated three phase buck converter is presented. The voltage spike on the diodes is clamped to permit the use of lower voltage rating diodes and the energy trapped in the transformer leakage inductance due to the reverse recovery current of the diodes is recycled to the output. The principle of operation of the active clamp with the three phase buck is analyzed and verified on a 6 kW prototype.

Keywords

inductance; magnetic leakage; power factor correction; power semiconductor diodes; rectifying circuits; transformers; 100 A; 48 V; 6 kW; active lossless clamp circuit principles; energy trapping; isolated three phase buck converter; lower voltage rating diodes; rectifier; reverse recovery current; secondary active clamp; secondary diodes; three phase power factor corrected isolated buck converter; transformer leakage inductance; voltage spike clamping; Buck converters; Circuits; Clamps; Diodes; Frequency conversion; Reactive power; Rectifiers; Stress; Switches; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 2002. INTELEC. 24th Annual International

Print_ISBN

0-7803-7512-2

Type

conf

DOI

10.1109/INTLEC.2002.1048641

Filename

1048641