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Two Novel Synchronized Bus-Clamping PWM Strategies Based on Space Vector Approach for High Power Drives

Narayanan, G and Ranganathan, VT (2002) Two Novel Synchronized Bus-Clamping PWM Strategies Based on Space Vector Approach for High Power Drives. In: IEEE Transactions on Power Electronics, 17 (1). pp. 84-93.

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Abstract

Two synchronized bus-clamping pulse width modulation (PWM) strategies based on the space vector approach are proposed for high-power induction motor drives. The two strategies together can produce PWM waveforms with any odd pulse number, preserving the waveform symmetries. The proposed strategies operate upto the six-step mode, maintaining the proportionality between the reference magnitude and the fundamental voltage generated throughout. These two strategies lead to lesser harmonic distortion as well as lesser peak current over the conventional space vector strategy (CSVS) in the high speed ranges of constant V/F drives. The reduction in the harmonic distortion over CSVS subject to a given maximum switching frequency (FSW(MAX)) of the inverter is demonstrated theoretically as well as experimentally for FSW(MAX)=750 Hz and 450 Hz, both with and without overmodulation. The best reduction in the distortion is as high as 30% to 50% in the different cases considered. Further, these two PWM strategies are also useful in reducing the switching frequency of the inverter over sine-triangle PWM and CSVS subject to an upper limit on the harmonic distortion.

Item Type: Journal Article
Additional Information: Copyright 2002 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.
Keywords: Fourier series;harmonic distortion;induction motor drives;inverters;overmodulation;pulse width modulation;space vector;variable speed drives;vectors
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 20 Nov 2007
Last Modified: 19 Sep 2010 04:16
URI: http://eprints.iisc.ernet.in/id/eprint/2020

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