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Analysis of Peak-to-Peak Current Ripple Amplitude in Seven-Phase PWM Voltage Source Inverters

Author

Listed:
  • Gabriele Grandi

    (Department of Electrical Engineering, University of Bologna, Viale Risorgimento 2, Bologna 40136, Italy)

  • Jelena Loncarski

    (Department of Electrical Engineering, University of Bologna, Viale Risorgimento 2, Bologna 40136, Italy)

Abstract

Multiphase systems are nowadays considered for various industrial applications. Numerous pulse width modulation (PWM) schemes for multiphase voltage source inverters with sinusoidal outputs have been developed, but no detailed analysis of the impact of these modulation schemes on the output peak-to-peak current ripple amplitude has been reported. Determination of current ripple in multiphase PWM voltage source inverters is important for both design and control purposes. This paper gives the complete analysis of the peak-to-peak current ripple distribution over a fundamental period for multiphase inverters, with particular reference to seven-phase VSIs. In particular, peak-to-peak current ripple amplitude is analytically determined as a function of the modulation index, and a simplified expression to get its maximum value is carried out. Although reference is made to the centered symmetrical PWM, being the most simple and effective solution to maximize the DC bus utilization, leading to a nearly-optimal modulation to minimize the RMS of the current ripple, the analysis can be readily extended to either discontinuous or asymmetrical modulations, both carrier-based and space vector PWM. A similar approach can be usefully applied to any phase number. The analytical developments for all different sub-cases are verified by numerical simulations.

Suggested Citation

  • Gabriele Grandi & Jelena Loncarski, 2013. "Analysis of Peak-to-Peak Current Ripple Amplitude in Seven-Phase PWM Voltage Source Inverters," Energies, MDPI, vol. 6(9), pages 1-19, August.
    • Handle: RePEc:gam:jeners:v:6:y:2013:i:9:p:4429-4447:d:28315
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    Citations

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    Cited by:

    1. Jelena Loncarski & Mats Leijon & Milan Srndovic & Claudio Rossi & Gabriele Grandi, 2015. "Comparison of Output Current Ripple in Single and Dual Three-Phase Inverters for Electric Vehicle Motor Drives," Energies, MDPI, vol. 8(5), pages 1-17, April.
    2. Marija Vujacic & Manel Hammami & Milan Srndovic & Gabriele Grandi, 2017. "Theoretical and Experimental Investigation of Switching Ripple in the DC-Link Voltage of Single-Phase H-Bridge PWM Inverters," Energies, MDPI, vol. 10(8), pages 1-16, August.
    3. Marija Vujacic & Manel Hammami & Milan Srndovic & Gabriele Grandi, 2018. "Analysis of dc-Link Voltage Switching Ripple in Three-Phase PWM Inverters," Energies, MDPI, vol. 11(2), pages 1-14, February.
    4. Hussein Zahr & Jinlin Gong & Eric Semail & Franck Scuiller, 2016. "Comparison of Optimized Control Strategies of a High-Speed Traction Machine with Five Phases and Bi-Harmonic Electromotive Force," Energies, MDPI, vol. 9(12), pages 1-19, November.
    5. Jiang, Shiqi & Wang, Panbao & Mei, Zhaozhao & Wang, Wei & Xu, Dianguo, 2021. "A variable inductor based harmonic filter design for multi-phase renewable energy systems with double closed-loop control," Energy, Elsevier, vol. 236(C).
    6. Gabriele Grandi & Jelena Loncarski & Milan Srndovic, 2016. "Analysis and Minimization of Output Current Ripple for Discontinuous Pulse-Width Modulation Techniques in Three-Phase Inverters," Energies, MDPI, vol. 9(5), pages 1-23, May.

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