DocumentCode :
1325956
Title :
Improved zero-current transition converters for high-power applications
Author :
Mao, Hengchun ; Lee, Fred C Y ; Zhou, Xunwei ; Dai, Heping ; Cosan, Mohummet ; Boroyevich, Dushan
Author_Institution :
Lucent Technol., AT&T Bell Labs., Mesquite, TX, USA
Volume :
33
Issue :
5
fYear :
1997
Firstpage :
1220
Lastpage :
1232
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 need for passive snubbers, due to the much reduced switch stress. The cost of the auxiliary switches can he reduced compared to the existing ZCT schemes, due to their zero-current turnoff. The proposed technology is well suited for DC-DC and three-phase converters with insulated gate bipolar transistors (IGBTs), MOS-controlled thyristors (MCTs), and gate-turnoff switches (GTOs). Theoretical analysis, computer simulation, and experimental results are presented to explain the proposed schemes
Keywords :
AC-AC power convertors; DC-DC power convertors; MOS-controlled thyristors; insulated gate bipolar transistors; power semiconductor switches; switching circuits; thyristor convertors; DC-DC converters; GTO; IGBT; MCT; MOS-controlled thyristors; auxiliary switches; computer simulation; gate-turnoff switches; high-power applications; insulated gate bipolar transistors; switch turn-on problems; switching losses reduction; three-phase converters; turn-off; turn-on; zero-current conditions; zero-current switching; zero-current transition converters; Costs; DC-DC power converters; Insulated gate bipolar transistors; Snubbers; Stress; Switches; Switching converters; Switching loss; Thyristors; Zero current switching;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/28.633800
Filename :
633800
Link To Document :
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