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Dual two-level inverter scheme for an open-end winding induction motor drive with a single DC power supply and improved DC bus utilisation

Somasekhar, VT and Gopakumar, K and Baiju, MR (2004) Dual two-level inverter scheme for an open-end winding induction motor drive with a single DC power supply and improved DC bus utilisation. In: IEE Proceedings of Electric Power Applications, 151 (2). pp. 230-238.

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Abstract

A dual two-level inverter fed open-end winding induction motor drive with a single DC-power supply is proposed. The proposed scheme produces voltage space vector locations identical to those of a conventional three-level inverter. In the conventional neutral-clamped three-level inverter, the series-connected DC link capacitors carry the load current, resulting in a fluctuating neutral point. Also, a three-level inverter requires bulky DC link capacitors. In the proposed scheme, the DC link capacitors carry currents of higher frequency and hence the neutral point fluctuations are reduced. A PWM switching strategy to suppress the zero sequence currents for all the voltage space phasor combinations is also proposed. This strategy is an improvisation of the one that uses a switched neutral to eliminate the triplen harmonic currents and results in an improved DC bus utilisation.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Institution of Electrical Engineers (IEE)
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly, (CEDT) Centre for Electronic Design & Technology)
Date Deposited: 13 Sep 2005
Last Modified: 19 Sep 2010 04:19
URI: http://eprints.iisc.ernet.in/id/eprint/3505

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