A new quasi-single-stage isolated three-phase ZVZCS buck PWM rectifier

Author

Wang, Kunrong ; Lee, Fred C. ; Boroyevich, Dushan ; Yan, Xinxiang

Author_Institution

Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

Volume

1

fYear

1996

fDate

23-27 Jun 1996

Firstpage

449

Abstract

A new quasi-single-stage isolated three-phase zero-voltage/zero-current-switched (ZVZCS) buck PWM rectifier for high-power off-line applications is proposed. It consists of a three-phase buck bridge switching under zero-current and a phase-shift-controlled full-bridge with ZVZCS, while no intermediate DC-link is involved. Input power and displacement factor control, input current shaping, tight output voltage regulation, high-frequency transformer isolation, and soft-switching for all the power devices are realized in a unified single stage. A 6 kW, 50 kHz prototype for telecommunication applications has been developed and preliminary tests for the prototype validates the operation of the proposed rectifier. Simple control, high efficiency and fast dynamics are among its salient features

Keywords

PWM power convertors; bridge circuits; high-frequency transformers; phase control; power control; rectifying circuits; switching circuits; telecommunication power supplies; voltage control; 50 kHz; 6 kW; Input power control; displacement factor control; fast dynamics; high efficiency; high-frequency transformer isolation; high-power off-line applications; input current shaping; isolated three-phase ZVZCS buck PWM rectifier; output voltage regulation; phase-shift-controlled full-bridge; quasi-single-stage rectifier; soft-switching; telecommunication applications; three-phase buck bridge; zero-current-switching; zero-voltage switching; Filtering; Matrix converters; Power harmonic filters; Prototypes; Pulse width modulation; Rectifiers; Telecommunication control; Topology; Voltage control; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1996. PESC '96 Record., 27th Annual IEEE

Conference_Location

Baveno

ISSN

0275-9306

Print_ISBN

0-7803-3500-7

Type

conf

DOI

10.1109/PESC.1996.548619

Filename

548619