Compensation of nonlinearities in diode-clamped multilevel converters

Minshull, S. R., Bingham, C. M., Stone, D. A. and Foster, M. P. (2010) Compensation of nonlinearities in diode-clamped multilevel converters. IEEE Transactions on Industrial Electronics, 57 (8). pp. 2651-2658. ISSN 0278-0046

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The application of multilevel converters for exciting permanent-magnet machines with low-phase inductance to dc-link voltage ratios facilitates a reduction in high-frequency switching harmonics. However, converter nonlinearities and, in-particular, on-state device voltage drops, create additional low-frequency harmonics. This paper therefore proposes a generic compensation scheme to accommodate the effects of such converter nonlinearities and, in doing so, improve the harmonic quality of the machine phase currents. Experimental results gathered from a prototype five-level diode-clamped converter validate the benefits of the proposed scheme by showing quantitative reductions in low-frequency harmonics. © 2006 IEEE.

Keywords:Compensation scheme, DC-link voltages, Dead- time compensation, Diode-clamped, Harmonic quality, High-frequency switching, Low frequency, Multilevel converter, Non-Linearity, Permanent Magnet Synchronous Motor, Permanent-magnet machine, Phase currents, Phase inductance, space-vector (SV) modulation (SVM), Voltage drop, Electric motors, Harmonic analysis, Permanent magnets, Vector spaces, Synchronous motors
Subjects:H Engineering > H610 Electronic Engineering
Divisions:College of Science > School of Engineering
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ID Code:10116
Deposited On:16 Dec 2013 17:32

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