Naayagi, R.T., Shuttleworth, R. and Forsyth, A.J. (2011) Investigating the effect of snubber capacitor on high power IGBT turn-off. In: Proceedings of the 2011 1st International Conference on Electrical Energy Systems. IEEE Conference Publications . Institute of Electrical and Electronics Engineering, Inc., Piscataway, NJ, USA, pp. 50-55. ISBN 9781612843780 (doi:https://doi.org/10.1109/ICEES.2011.5725301)

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Abstract

A 20kW bidirectional dual active bridge DC-DC converter prototype is designed and built for aerospace energy storage applications. The converter employs high power IGBT modules on the high voltage and low voltage sides. This paper presents the theoretical analysis and experimental results of turn-off performance of those high power IGBTs with capacitive snubbers. The turn-off performance of the 1200V, 300A ultrafast IGBT and 600V, 760A trench IGBT has been analyzed with and without a snubber capacitor. The influence of variation in snubber capacitor and variation in gate resistance on the IGBT performance is discussed. This gives a better understanding of IGBT characteristics during the turn-off transient. Experimental results show that the snubber capacitor reduces the voltage stress and switching losses significantly during turn-off. The direct mount snubber outperforms the wire-ended snubber for the same value of capacitance; hence they are suggested for high frequency, high power applications.

Item Type:	Conference Proceedings
Title of Proceedings:	Proceedings of the 2011 1st International Conference on Electrical Energy Systems
Additional Information:	[1] This paper was first presented at the 2011 1st International Conference on Electrical Energy Systems (ICEES 2011), held from 3-5 January 2011 in Chennai, India. [2] INSPEC Accession Number: 11862011
Uncontrolled Keywords:	20kW bidirectional dual active bridge DC-DC converter prototype, aerospace energy storage applications, high power IGBTs, snubber capacitor, direct mount snubber, wire-ended snubber, capacitance
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments:	School of Engineering School of Engineering > Department of Engineering Systems
Related URLs:	Publisher Organisation Organisation
Last Modified:	14 Oct 2016 09:19
URI:	http://gala.gre.ac.uk/id/eprint/7555

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