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New Modulation Technique to Mitigate Common Mode Voltage Effects in Star-Connected Five-Phase AC Drives

Author

Listed:
  • Markel Fernandez

    (Derpartment of Electronic Technology, University of the Basque Country (UPV/EHU), Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain)

  • Andres Sierra-Gonzalez

    (Tecnalia Research and Innovation, C. Mikeletegi 7, 20009 Donostia, Spain)

  • Endika Robles

    (Derpartment of Electronic Technology, University of the Basque Country (UPV/EHU), Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain)

  • Iñigo Kortabarria

    (Derpartment of Electronic Technology, University of the Basque Country (UPV/EHU), Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain)

  • Edorta Ibarra

    (Derpartment of Electronic Technology, University of the Basque Country (UPV/EHU), Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain)

  • Jose Luis Martin

    (Derpartment of Electronic Technology, University of the Basque Country (UPV/EHU), Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain)

Abstract

Star-connected multiphase AC drives are being considered for electromovility applications such as electromechanical actuators (EMA), where high power density and fault tolerance is demanded. As for three-phase systems, common-mode voltage (CMV) is an issue for multiphase drives. CMV leads to shaft voltages between rotor and stator windings, generating bearing currents which accelerate bearing degradation and produce high electromagnetic interferences (EMI). CMV effects can be mitigated by using appropriate modulation techniques. Thus, this work proposes a new Hybrid PWM algorithm that effectively reduces CMV in five-phase AC electric drives, improving their reliability. All the mathematical background required to understand the proposal, i.e., vector transformations, vector sequences and calculation of analytical expressions for duty cycle determination are detailed. Additionally, practical details that simplify the implementation of the proposal in an FPGA are also included. This technique, HAZSL5M5-PWM, extends the linear range of the AZSL5M5-PWM modulation, providing a full linear range. Simulation results obtained in an accurate multiphase EMA model are provided, showing the validity of the proposed modulation approach.

Suggested Citation

  • Markel Fernandez & Andres Sierra-Gonzalez & Endika Robles & Iñigo Kortabarria & Edorta Ibarra & Jose Luis Martin, 2020. "New Modulation Technique to Mitigate Common Mode Voltage Effects in Star-Connected Five-Phase AC Drives," Energies, MDPI, vol. 13(3), pages 1-19, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:607-:d:314823
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    References listed on IDEAS

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    Cited by:

    1. Li Zhao & Shoudao Huang & Yuan Gao & Jian Zheng, 2022. "A Common-Mode Voltage Suppression Strategy Based on Double Zero-Sequence Injection PWM for Two-Level Six-Phase VSIs," Energies, MDPI, vol. 15(17), pages 1-25, August.
    2. Robles, Endika & Fernandez, Markel & Andreu, Jon & Ibarra, Edorta & Zaragoza, Jordi & Ugalde, Unai, 2022. "Common-mode voltage mitigation in multiphase electric motor drive systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 157(C).
    3. Fernando Acosta-Cambranis & Jordi Zaragoza & Luis Romeral & Néstor Berbel, 2020. "Comparative Analysis of SVM Techniques for a Five-Phase VSI Based on SiC Devices," Energies, MDPI, vol. 13(24), pages 1-25, December.
    4. Robles, Endika & Fernandez, Markel & Andreu, Jon & Ibarra, Edorta & Ugalde, Unai, 2021. "Advanced power inverter topologies and modulation techniques for common-mode voltage elimination in electric motor drive systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 140(C).

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