IEEJ Transactions on Industry Applications
Online ISSN : 1348-8163
Print ISSN : 0913-6339
ISSN-L : 0913-6339
Special Issue Paper
Series Connection of Snubberless IGBTs for 6.6kV Transformerless Converters
Naotaka OkadaMasahiro TakasakiJun NarushimaRyohei MiyagawaShuji Katoh
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2008 Volume 128 Issue 7 Pages 874-879

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Abstract

We developed a 6.6-kV 1-MVA transformerless converter making use of a snubberless insulated gate bipolar transistor (IGBT) 8-series connection using an Active-Gate-Control. The Active-Gate-Control can balance the collector voltage of IGBTs connected in series enabling the IGBT series connection. It allows the converter to output a high enough AC voltage to directly connect to 6.6-kV distribution lines. Therefore, the converter does not need a step-up and step-down transformer, and is extremely small and compact.

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© 2008 by the Institute of Electrical Engineers of Japan
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