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Space-Vector-Based Hybrid Pulsewidth Modulation Techniques for a Three-Level Inverter

Das, Soumitra and Narayanan, G and Pandey, M (2014) Space-Vector-Based Hybrid Pulsewidth Modulation Techniques for a Three-Level Inverter. In: IEEE TRANSACTIONS ON POWER ELECTRONICS, 29 (9). pp. 4580-4591.

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Official URL: http://dx.doi.org/10.1109/TPEL.2013.2287095


Novel switching sequences have been proposed recently for a neutral-point-clamped three-level inverter, controlled effectively as an equivalent two-level inverter. It is shown that the four novel sequences can be grouped into two pairs of sequences. Using each pair of sequences, a hybrid pulsewidth modulation (PWM) technique is proposed, which deploys the two sequences in appropriate spatial regions to reduce the current ripple. Further, a third hybrid PWM technique is proposed which uses all the five sequences (including the conventional sequence) in appropriate spatial regions. Each proposed hybrid PWM is shown, both analytically and experimentally, to outperform its constituent PWM methods in terms of harmonic distortion. In particular, the third proposed hybrid PWM reduces the total harmonic distortion considerably at low- and high-speed ranges of a constant volts-per-hertz induction motor drive, compared to centered space vector PWM.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Keywords: Harmonic distortion; hybrid pulsewidth modulation; multilevel inverter; neutral-point-clamped (NPC) inverter; pulsewidth modulated inverter; space vector modulation; switching sequence; voltage source inverter
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 16 Jun 2014 10:29
Last Modified: 16 Jun 2014 10:29
URI: http://eprints.iisc.ac.in/id/eprint/49238

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