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International Journal of

Recent Trends in Engineering

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International Journal of Recent Trends in Engineering (IJRTE)

ISSN 1797-9617

Volume 1, Number 3, May 2009

Issue on Electrical & Electronics

Page(s): 229-233

Space Vector Modulation with DC-Link Voltage Balancing Control for Three-Level Inverters

Kalpesh H. Bhalodi, and Pramod Agarwal

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Modified space vector modulation (SVM) for DC-link voltage balancing of three-level inverter is proposed here. Effect of the DC-link capacitor voltage deviation on inverter switching states is presented for three-level inverter. Pulse pattern arrangements for proposed SVM using degree of freedom available in choice of redundant space vectors, sequencing of vectors, and splitting of duty cycles of vector are best exploited. Seven-segment SVM scheme and modified closed loop space vector DC-link voltage balancing control schemes are implemented. The effectiveness of proposed scheme is verified by simulations and experimental verification on laboratory prototype.

Index Terms

diode-clamped inverter, multilevel inverter, space-vector modulation, voltage source inverter

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