Experimental Study on Switching Characteristics of an Inverter Leg Consisting of IGBTs of Dissimilar Makes

Das, Subhas Chandra and Narayanan, G and Tiwari, Arvind (2014) Experimental Study on Switching Characteristics of an Inverter Leg Consisting of IGBTs of Dissimilar Makes. In: IEEE 2nd International Conference on Electrical Energy Systems (ICEES), JAN 07-09, 2014, Chennai, INDIA, pp. 235-240.

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Abstract

Usually the top and bottom IGBT devices in an inverter leg are of the same make (i.e. from same manufacturer). At low power level, these two devices even may be contained in the same module. However at high power levels the top and bottom devices are in separate modules. Sometimes, in the event of device failure, device of particular make may be replaced by one of another make, but of same ratings (on account of non-availability of the original make). This paper investigates the effect of such intermixing of two different makes of high power IGBTs in an inverter leg on the switching characteristics. The switching transitions between IGBT and diode of similar make and those of IGBT and diode of dissimilar make are compared experimentally at various DC link voltages and currents. The comparisons are made in terms of, IGBT peak turn-on di/dt, IGBT peak turn-off di/dt, peak diode reverse recovery current (I-rr), peak IGBT voltage overshoot and switching energy losses.

Item Type:	Conference Proceedings
Publisher:	IEEE
Additional Information:	Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Keywords:	Insulated Gate Bipolar Transistor; power converter; Voltage Source Inverter; switching characteristic; switching energy loss
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	06 Jul 2015 05:45
Last Modified:	06 Jul 2015 05:45
URI:	http://eprints.iisc.ac.in/id/eprint/51795

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