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Analytical Expression for RMS DC Link Capacitor Current in a Three-Level Inverter

Gopalakrishnan, KS and Das, Soumitra and Narayanan, G (2011) Analytical Expression for RMS DC Link Capacitor Current in a Three-Level Inverter. In: CENTENARY CONFERENCE, 2011 - ELECTRICAL ENGINEERING, INDIAN INSTITUTE OF SCIENCE, 15-17 December, IISc, Bangalore.

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An analytical expression is derived for calculating the rms current through the DC link capacitor in a three level inverter. The output current of the inverter is assumed to sinusoidal. Variations in the capacitor rms current with modulation index as well as line side power factor are studied. The worst case current stress on the capacitor is determined. This is required for sizing the capacitor and is useful for predicting the capacitor losses and life. The analytical expression derived is validated through simulations and experimental results at a number of operating points.

Item Type: Conference Paper
Publisher: Indian Institute of Science
Additional Information: Copyright for this article belongs to the authors of the paper
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 17 Jun 2013 12:02
Last Modified: 17 Jun 2013 12:02
URI: http://eprints.iisc.ac.in/id/eprint/46712

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