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Design of a new type of pre-charge circuit of single-quadrant frequency converter

Authors :
TANG Bai-shan
HUANG Cui-bai
Source :
Gong-kuang zidonghua, Vol 39, Iss 2, Pp 20-22 (2013)
Publication Year :
2013
Publisher :
Editorial Department of Industry and Mine Automation, 2013.

Abstract

In view of problems of complex structure and control, high cost and big volume of contactor and charging resistance existed in traditional pre-charge circuit of single-quadrant frequency converter, a new type of pre-charge circuit of single-quadrant frequency converter was designed. The circuit uses three-phase half control rectifier bridge to replace diode rectifier bridge of traditional pre-charge circuit of single-quadrant frequency converter and takes off contactor and charging resistance. When the frequency converter starts, trigger angle of the three-phase half control rectifier bridge decreases rhythmically from 120° to 0°through synchronization circuit and single-chip microcomputer control circuit, so as to make charging current of capacitance in allowable range. The test result showed that the circuit has simple structure, reliable performance and flexible control.

Details

Language :
Chinese
ISSN :
1671251X
Volume :
39
Issue :
2
Database :
Directory of Open Access Journals
Journal :
Gong-kuang zidonghua
Publication Type :
Academic Journal
Accession number :
edsdoj.0cbef4370ebd499a9d8a723318559d4c
Document Type :
article