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Assessment of the Overall Efficiency in WPT Stations for Electric Vehicles

Author

Listed:
  • Mauro Zucca

    (Istituto Nazionale di Ricerca Metrologica (INRiM), 10135 Torino, Italy
    These authors contributed equally to this work.)

  • Vincenzo Cirimele

    (Dipartimento Energia, Politecnico di Torino, 10129 Torino, Italy
    These authors contributed equally to this work.)

  • Jorge Bruna

    (CIRCE Foundation, 50018 Zaragoza, Spain
    These authors contributed equally to this work.)

  • Davide Signorino

    (Istituto Nazionale di Ricerca Metrologica (INRiM), 10135 Torino, Italy
    These authors contributed equally to this work.)

  • Erika Laporta

    (CIRCE Foundation, 50018 Zaragoza, Spain
    These authors contributed equally to this work.)

  • Jacopo Colussi

    (Dipartimento Energia, Politecnico di Torino, 10129 Torino, Italy
    These authors contributed equally to this work.)

  • Miguel Angel Alonso Tejedor

    (CIRCE Foundation, 50018 Zaragoza, Spain
    These authors contributed equally to this work.)

  • Federico Fissore

    (Istituto Nazionale di Ricerca Metrologica (INRiM), 10135 Torino, Italy
    These authors contributed equally to this work.)

  • Umberto Pogliano

    (Istituto Nazionale di Ricerca Metrologica (INRiM), 10135 Torino, Italy
    These authors contributed equally to this work.)

Abstract

The on-site assessment of the efficiency of a charging station is not a trivial process and is a topic of discussion for professionals. The efficiency of electric Vehicle Supply Equipment (EVSE), is an important parameter for both the user and the EVSE operator. This paper deals with a particular type of EVSE, using static wireless power transfer (WPT). This paper proposes a clear method to account for the parameters which can affect the correct determination of efficiency, such as in particular the accuracy of the meters and the effect of temperature. This work proposes a method to define the accuracy of the power and efficiency on-site assessment, and is aimed at clarifying that despite distorted waveforms at the charging stations, it is possible to reach a good accuracy in a wide temperature span (expanded uncertainty <0.5% between 5 °C and 40 °C). Analysis initiated from the measurement conditions and the actual waveforms recorded at two WPT EVSEs with differently rated power. This paper paves the way for the possibility of verifying class 0.5 m on-site, desirable for this type of application. The paper also clarifies that despite the evident presence of voltage and current ripple at the batteries, the weight of the ripple power on the total power is nevertheless lower than 0.1%. Finally, the paper highlights how, for the correct measurement of the ripple, it would be advisable to calibrate the instrumentation in DC and in AC, at a frequency double that of the working frequency of the EVSE coils.

Suggested Citation

  • Mauro Zucca & Vincenzo Cirimele & Jorge Bruna & Davide Signorino & Erika Laporta & Jacopo Colussi & Miguel Angel Alonso Tejedor & Federico Fissore & Umberto Pogliano, 2021. "Assessment of the Overall Efficiency in WPT Stations for Electric Vehicles," Sustainability, MDPI, vol. 13(5), pages 1-19, February.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:5:p:2436-:d:504849
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    References listed on IDEAS

    as
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    Cited by:

    1. Alicia Triviño & José M. González-González & José A. Aguado, 2021. "Wireless Power Transfer Technologies Applied to Electric Vehicles: A Review," Energies, MDPI, vol. 14(6), pages 1-21, March.

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