Improved zero-current transition converters for high power applications

Author

Mao, Hengchun ; Lee, Fred C. ; Xunwei Zhou ; Boroyevich, Dushan

Author_Institution

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

Volume

2

fYear

1996

fDate

6-10 Oct 1996

Firstpage

1145

Abstract

Existing zero-current transition (ZCT) converters do not solve main switch turn-on problems and require auxiliary switches to be turned off with high current, and therefore are not suitable for high power applications. Novel ZCT schemes proposed in this paper enable all main switches and auxiliary switches to be turned on and off under zero current conditions. The zero-current switching at both turn-on and turn-off not only reduces switching losses significantly, but also eliminates the necessity of passive snubbers due to the much reduced switch stress. The cost of the auxiliary switches can be reduced compared to the existing ZCT schemes due to their zero-current turn-off. The proposed technology is well suited for DC-DC and three-phase converters with IGBTs, MCTs and GTOs. Theoretical analysis, computer simulation and experimental results are presented to explain the proposed schemes

Keywords

DC-DC power convertors; MOS-controlled thyristors; insulated gate bipolar transistors; losses; power semiconductor switches; switching circuits; thyristor convertors; DC-DC converters; GTO; IGBT; MCT; auxiliary switches; computer simulation; switch stress reduction; switch turn-on problems; switching losses reduction; three-phase converters; zero-current switching; zero-current transition converters; Computer simulation; Costs; DC-DC power converters; Insulated gate bipolar transistors; Snubbers; Stress; Switches; Switching converters; Switching loss; Zero current switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE

Conference_Location

San Diego, CA

ISSN

0197-2618

Print_ISBN

0-7803-3544-9

Type

conf

DOI

10.1109/IAS.1996.560223

Filename

560223