LAPSE:2018.1075
Published Article
LAPSE:2018.1075
Analysis and Minimization of Output Current Ripple for Discontinuous Pulse-Width Modulation Techniques in Three-Phase Inverters
Gabriele Grandi, Jelena Loncarski, Milan Srndovic
November 27, 2018
This paper gives the complete analysis of the output current ripple in three-phase voltage source inverters considering the different discontinuous pulse-width modulation (DPWM) strategies. In particular, peak-to-peak current ripple amplitude is analytically evaluated over the fundamental period and compared among the most used DPWMs, including positive and negative clamped (DPWM+ and DPWM−), and the four possible combinations between them, usually named as DPWM0, DPWM1, DPWM2, and DPWM3. The maximum and the average values of peak-to-peak current ripple are estimated, and a simple method to correlate the ripple envelope with the ripple rms is proposed and verified. Furthermore, all the results obtained by DPWMs are compared to the centered pulse-width modulation (CPWM, equivalent to the space vector modulation) to identify the optimal pulse-width modulation (PWM) strategy as a function of the modulation index, taking into account the different average switching frequency. In this way, the PWM technique providing for the minimum output current ripple is identified over the whole modulation range. The analytical developments and the main results are experimentally verified by current ripple measurements with a three-phase PWM inverter prototype supplying an induction motor load.
Keywords
harmonic distortion, inverters, pulse-width modulation (PWM), ripple minimization
Suggested Citation
Grandi G, Loncarski J, Srndovic M. Analysis and Minimization of Output Current Ripple for Discontinuous Pulse-Width Modulation Techniques in Three-Phase Inverters. (2018). LAPSE:2018.1075
Author Affiliations
Grandi G: Department of Electrical, Electronic, and Information Engineering, University of Bologna, Viale Risorgimento 2, Bologna 40136, Italy [ORCID]
Loncarski J: Department of Engineering Sciences, Ångström Laboratory, Uppsala University, Lägerhyddsvägen 1, Box 534, Uppsala S-751 21, Sweden
Srndovic M: Department of Electrical, Electronic, and Information Engineering, University of Bologna, Viale Risorgimento 2, Bologna 40136, Italy [ORCID]
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Journal Name
Energies
Volume
9
Issue
5
Article Number
E380
Year
2016
Publication Date
2016-05-19
Published Version
ISSN
1996-1073
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PII: en9050380, Publication Type: Journal Article
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LAPSE:2018.1075
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doi:10.3390/en9050380
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Nov 27, 2018
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Nov 27, 2018
 
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Calvin Tsay
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