Three-phase high power factor AC/DC converter

Author

Lin, B.-R. ; Yang, T.-Y.

Author_Institution

Dept. of Electr. Eng., Nat. Yunlin Univ. of Sci. & Technol., Taiwan, Taiwan

Volume

152

Issue

3

fYear

2005

fDate

5/6/2005 12:00:00 AM

Firstpage

485

Lastpage

493

Abstract

A unidirectional three-phase AC/DC converter is proposed to obtain almost unity power factor, draw sinusoidal line currents and keep the DC-bus voltage constant. Two active switches and two power diodes are used in each converter leg to generate a three-level PWM waveform on the AC terminal voltages. The proposed converter has simpler circuit configuration compared with the conventional three-level PWM converters. The classical proportional-integral voltage controller and the hysteresis current controller are adopted in the control scheme to achieve DC-bus voltage regulation and line-current command tracking. A neutral-point voltage compensator is used to balance the neutral-point voltage due to load change. The validity and effectiveness of the proposed control algorithm is verified through simulations and experimental results.

Keywords

AC-DC power convertors; PI control; PWM power convertors; electric current control; rectifying circuits; voltage control; voltage regulators; DC-bus voltage regulation; hysteresis current controller; line-current command tracking; neutral-point voltage compensator; proportional-integral voltage controller; three-level PWM; three-phase high power factor AC/DC converter; unidirectional three-phase AC/DC converter; unity power factor;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:20045201

Filename

1436170