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A hybrid nine-level inverter for IM drive

Rajeevan, PP and Patel, C and Gopakumar, K and Haitham, AR and Sivakumar, K (2011) A hybrid nine-level inverter for IM drive. In: 2011 IEEE International Symposium on Industrial Electronics (ISIE), 27-30 June 2011, Gdansk.

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This paper proposes a new hybrid nine-level inverter topology for IM drive. The nine-level structure is realized by using two three-phase two-level inverters fed by isolated DC voltage sources and six H-bridges fed by capacitors. The number of switches required in this topology is only 36 where as the conventional nine-level topologies require 48 switches. The voltages across the capacitors, feeding the H-bridges that operate at asymmetric voltages, are effectively balanced by making use of the switching state redundancies. In this topology, the requirement of DC link voltage is only half of the maximum magnitude of the voltage space vector. As the two-level inverters are powered by isolated voltage sources, the circulation of triplen harmonic current in the motor winding is prevented. The proposed drive system is capable of functioning in three-level mode in case of any switch failure in H-bridges. The performance of the proposed topology in the entire modulation range is verified by simulation study and experiment.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 2011 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited: 29 Dec 2011 04:48
Last Modified: 29 Dec 2011 04:48
URI: http://eprints.iisc.ac.in/id/eprint/42925

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