Sinusoidal line current rectification with a 100kHZ B-SIT step-up converter

Author

Mohan, Ned ; Undeland, Tore M. ; Ferraro, Ralph J.

Author_Institution

Dept. of Elect. Eng. University of Minnesota Minneapolis, MN 55455

fYear

1984

fDate

18-21 June 1984

Firstpage

92

Lastpage

98

Abstract

A step-up converter circuit for the sinusoidal line current rectification at a unity power factor is described. A Bipolar-Static-Induction-Transitor (B-SIT) with extremely fast switching times is utilized. The gate drive and the snubber circuits are presented. A new way to achieve current hysteresis control without noise problems for switching frequencies up to 100 kHz is developed. Measured overall efficiency and the transistor losses are presented. At 1 kw dc output, the total transistor switching and conduction losses are 9 watts at about 100 kHz switching frequency. The overall rectification efficiency is in a 97–98.5% range. Justification for the use of step-up converters is given. Component selection and the stability in the feedback loop is analyzed. The converter is especially advantageous for single phase in — three phase out, variable frequency ac motor drives in lower horsepower applications.

Keywords

Bridge circuits; Capacitors; Current measurement; Feedback loop; Logic gates; Snubbers; Switching frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1984 IEEE

Conference_Location

Gaithersburg, MD, USA

ISSN

0275-9306

Type

conf

DOI

10.1109/PESC.1984.7083467

Filename

7083467