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Wireless Battery Chargers Operating at Multiple Switching Frequencies with Improved Performance

Author

Listed:
  • Deniss Stepins

    (Institute of Industrial Electronics and Electrical Engineering, Riga Technical University, LV-1048 Riga, Latvia)

  • Aleksandrs Sokolovs

    (Institute of Industrial Electronics and Electrical Engineering, Riga Technical University, LV-1048 Riga, Latvia)

  • Janis Zakis

    (Institute of Industrial Electronics and Electrical Engineering, Riga Technical University, LV-1048 Riga, Latvia)

  • Ouseph Charles

    (Dyninno Ltd., LV-1010 Riga, Latvia)

Abstract

The operation of wireless battery chargers at multiple switching frequencies may lead to a noticeable suppression of conducted and radiated electromagnetic interference (EMI) at the cost of decreased efficiency (mainly at lower load resistances) and increased peak and root mean square values of currents of power components of the wireless battery charger. Moreover, the reduction in conducted EMI is only moderate (<8.3 dB). Therefore, a novel approach based on modified resonant circuits and a modified control technique to obtain better reduction in the conducted and radiated EMI without significantly compromising other performance characteristics of the wireless battery charger is proposed and validated by using simulations and experiments. It is shown in this paper that the wireless charger operating at multiple switching frequencies with the proposed approach for the performance improvement has a more effective implementation of the four-switching frequency spread-spectrum technique with better conducted and radiated EMI reduction at all load resistances, lower values of peak and RMS currents at all load resistances, and higher efficiency in constant current mode and in the beginning of constant voltage mode (at lower values of the load resistances) than that of the conventional wireless charger operating at multiple switching frequencies.

Suggested Citation

  • Deniss Stepins & Aleksandrs Sokolovs & Janis Zakis & Ouseph Charles, 2023. "Wireless Battery Chargers Operating at Multiple Switching Frequencies with Improved Performance," Energies, MDPI, vol. 16(9), pages 1-18, April.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:9:p:3734-:d:1134043
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    References listed on IDEAS

    as
    1. Jing-Yuan Lin & Yi-Chieh Hsu & Yo-Da Lin, 2020. "A Low EMI DC-DC Buck Converter with a Triangular Spread-Spectrum Mechanism," Energies, MDPI, vol. 13(4), pages 1-13, February.
    2. Yanling Li & Qichang Duan & Yang Zou, 2017. "High Robustness Control for Robotic Wireless Power Transfer Systems with Multiple Uncertain Parameters Using a Virtual Buck Converter," Energies, MDPI, vol. 10(4), pages 1-22, April.
    3. Viktor Shevchenko & Bohdan Pakhaliuk & Janis Zakis & Oleksandr Veligorskyi & Jaroslaw Luszcz & Oleksandr Husev & Oleksandr Lytvyn & Oleksandr Matiushkin, 2021. "Closed-Loop Control System Design for Wireless Charging of Low-Voltage EV Batteries with Time-Delay Constraints," Energies, MDPI, vol. 14(13), pages 1-21, June.
    4. Mohammad Mohammadpour & Lotfi Zeghmi & Sousso Kelouwani & Marc-André Gaudreau & Ali Amamou & Massinissa Graba, 2021. "An Investigation into the Energy-Efficient Motion of Autonomous Wheeled Mobile Robots," Energies, MDPI, vol. 14(12), pages 1-19, June.
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