Zero-voltage-transition DC-link techniques for three-phase AC-DC-AC PWM converters

Author

Mao, Hengchun ; Zhang, Jindong ; Lee, Fred C. ; Boroyevich, Dushan

Author_Institution

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

Volume

2

fYear

1997

fDate

23-27 Feb 1997

Firstpage

692

Abstract

New soft-switching topologies are proposed for AC-DC-AC power converters by applying a soft-switching mechanism to the common DC link, and using a single auxiliary circuit, which provides the soft-switching function to all of the twelve main switches. The switches in the AC-DC power converter and the DC link switch are turned on with zero voltage, while the switches in the DC-AC power converter are turned off with zero-voltage, resulting in much reduced switching losses. With coordinated control of the AC-DC and the DC-AC power converters, the soft-switching circuit is actuated only once in every switching cycle, and has much less power loss than in existing schemes

Keywords

AC-AC power convertors; AC-DC power convertors; DC-AC power convertors; PWM invertors; PWM power convertors; bipolar transistor switches; insulated gate bipolar transistors; power bipolar transistors; power semiconductor diodes; power semiconductor switches; rectifying circuits; switching circuits; AC-DC power converter; DC-AC power converter; ZVS DC-link techniques; auxiliary circuit; coordinated control; soft-switching topologies; switching losses; three-phase AC-DC-AC PWM converters; Analog-digital conversion; Pulse width modulation converters; Pulse width modulation inverters; Rectifiers; Semiconductor diodes; Switches; Switching circuits; Switching converters; Switching loss; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1997. APEC '97 Conference Proceedings 1997., Twelfth Annual

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-3704-2

Type

conf

DOI

10.1109/APEC.1997.575660

Filename

575660