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Space Vector Based Hybrid PWM Techniques for Reduced Current Ripple

Narayanan, G and Zhao, Di and Krishnamurthy, Harish K and Ayyanar, Rajapandian and Ranganathan, VT (2008) Space Vector Based Hybrid PWM Techniques for Reduced Current Ripple. In: IEEE Transactions on Industrial Electronics, 55 (4). pp. 1614-1627.


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This paper investigates certain novel switching sequences involving division of active vector time for space vectorbased pulsewidth modulation (PWM) generation for a voltage source inverter. This paper proposes two new sequences, and identifies all possible sequences, which result in the same average switching frequency as conventional space vector PWM (CSVPWM) at a given sampling frequency. This paper brings out amethod for designing hybrid PWMtechniques involving multiple sequences to reduce line current ripple. The three proposed hybrid PWM techniques (three-zone PWM, five-zone PWM and sevenzone PWM) employ three, five and seven different sequences, respectively, in every sector. Each sequence is employed in a spatial region within the sector where it results in the lowest rms current ripple over the given sampling period. The proposed techniques lead to a significant reduction in THD over CSVPWM at high line voltages. The five-zone technique results in the lowest THD among real-time techniques with uniform sampling, while the seven-zone technique is the best among real-time techniques with twin sampling rates. The superior harmonic performance of the proposed techniques over CSVPWM and existing bus-clamping PWM techniques is established theoretically as well as experimentally.

Item Type: Journal Article
Publication: IEEE Transactions on Industrial Electronics
Publisher: IEEE
Additional Information: ©2008 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: Terms Harmonic analysis;harmonic distortion;hybrid PWM;induction motor drive;pulsewidth modulation (PWM);PWM inverters;space vector;space vector modulation;spread spectrum;stator flux ripple;switching sequences
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 05 May 2008
Last Modified: 08 Jan 2013 05:29
URI: http://eprints.iisc.ac.in/id/eprint/13809

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