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Active snubber energy recovery circuit for series-connected IGBTs

Lim, T. C. and Williams, B. W. and Finney, S. J. (2011) Active snubber energy recovery circuit for series-connected IGBTs. IEEE Transactions on Power Electronics, 26 (7). pp. 1879-1889. ISSN 0885-8993

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Abstract

This paper presents a novel active snubber recovery circuit for series-connected insulated gate bipolar transistors (IGBTs). The proposed technique allows turnon and turnoff switching of the series IGBTs to be controlled and balanced through conventional snubber effects, but the configuration includes active circuitry to recover into the dc supply, the stored snubber energy. Detailed waveform analysis and associated mathematical equations are presented, supported by PSpice simulations. The proposed technique is practically demonstrated, at a scaled power level, on a single IGBT to illustrate the control concept and on three series-connected IGBTs to demonstrate dynamic voltage sharing.

Item type: Article
ID code: 40797
Keywords: active snubber circuit, series connection, insulated gate bipolar transistor (IGBT), energy recovery, series-connected IGBTs , insulated gate bipolar transistor , series connection , Electrical engineering. Electronics Nuclear engineering, Electrical and Electronic Engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Depositing user: Pure Administrator
Date Deposited: 08 Aug 2012 14:23
Last modified: 27 Mar 2014 10:26
URI: http://strathprints.strath.ac.uk/id/eprint/40797

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