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Active clamping on series connected free-wheel diodes through active voltage control

Lim, T.C. and Finney, S.J. and Williams, B.W. and Palmer, P. (2004) Active clamping on series connected free-wheel diodes through active voltage control. In: IEEE 35th Annual Power Electronics Specialists Conference, 2004, 2004-06-20, Aachen.

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Abstract

This paper presents an active voltage control technique, for series connected freewheel diodes in bridge legs, which suppresses the oscillation due to diode snap recovery, and clamps the overshoot sustained during reverse recovery. The need to utilise passive snubbers with this active voltage control technique to overcome the shortcoming of the active clamping, is analysed. This technique allows active balancing of the reverse voltage sharing among series connected free-wheel diodes. Experimental results are presented for the suppression of the oscillation seen by the free-wheeling diodes and the active clamping of the overshoot voltage with and without passive snubbers.

Item type: Conference or Workshop Item (Paper)
ID code: 39513
Keywords: oscillations , voltage control , power semiconductor diodes , snubbers , Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 03 May 2012 16:05
    Last modified: 04 Oct 2012 17:15
    URI: http://strathprints.strath.ac.uk/id/eprint/39513

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