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An Improved and Integrated Design of Segmented Dynamic Wireless Power Transfer for Electric Vehicles

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  • Heshou Wang

    (Power Electronics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China)

  • Ka Wai Eric Cheng

    (Power Electronics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China)

Abstract

This paper describes improvements in a segmented dynamic wireless power transfer (DWPT) system for electric vehicles (EVs), and aims to offer a stable charging method for high-power applications. An integrated design is presented, including the modified switching sequence, the size of segmented transmitters, and parallel inverter technology for high-power applications. Three consecutive transmitters mounted on the rail track are energized according to the position of the pickups. This three-consecutive-transmitter group is comprised of a Q-shaped coil, a DD-shaped coil, and a Q-shaped coil again (QDDQ). QDDQ is used as an elementary energized group to optimize the number of energized transmitters and mitigate the output voltage variation. The entire DWPT system is designed with finite element analysis (FEA) and studied with circuit topologies. Overall, an experimental prototype for dynamic charging is built to verify the overall performance, which shows a great agreement with the theoretical analysis. In this prototype, there are five transmitters and one receiver. All dimensions are 500 mm × 500 mm. The proposed system has been validated to realize 500 V constant output voltage with approximately 85% dc-dc efficiency from the 100 Ω to 200 Ω load conditions. A 2.5 kW maximum output power occurs at the 100 Ω load condition.

Suggested Citation

  • Heshou Wang & Ka Wai Eric Cheng, 2021. "An Improved and Integrated Design of Segmented Dynamic Wireless Power Transfer for Electric Vehicles," Energies, MDPI, vol. 14(7), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:7:p:1975-:d:529417
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    References listed on IDEAS

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    1. Ziwei Liang & Jianqiang Wang & Yiming Zhang & Jiuchun Jiang & Zhengchao Yan & Chris Mi, 2019. "A Compact Spatial Free-Positioning Wireless Charging System for Consumer Electronics Using a Three-Dimensional Transmitting Coil," Energies, MDPI, vol. 12(8), pages 1-10, April.
    2. Yansong Li & Minhao Wang & Weiwei Zhang & Mengmeng Zhao & Jun Liu, 2019. "A Frequency Locking Method for ICPT System Based on LCC/S Compensation Topology," Energies, MDPI, vol. 12(13), pages 1-11, July.
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    5. Andong Yin & Shenchun Wu & Weihan Li & Jinfang Hu, 2019. "Analysis of Battery Reduction for an Improved Opportunistic Wireless-Charged Electric Bus," Energies, MDPI, vol. 12(15), pages 1-24, July.
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    Cited by:

    1. Ahmed A. S. Mohamed & Ahmed A. Shaier & Hamid Metwally & Sameh I. Selem, 2022. "An Overview of Dynamic Inductive Charging for Electric Vehicles," Energies, MDPI, vol. 15(15), pages 1-59, August.
    2. Amjad, Muhammad & Farooq-i-Azam, Muhammad & Ni, Qiang & Dong, Mianxiong & Ansari, Ejaz Ahmad, 2022. "Wireless charging systems for electric vehicles," Renewable and Sustainable Energy Reviews, Elsevier, vol. 167(C).
    3. Geetha Palani & Usha Sengamalai & Pradeep Vishnuram & Benedetto Nastasi, 2023. "Challenges and Barriers of Wireless Charging Technologies for Electric Vehicles," Energies, MDPI, vol. 16(5), pages 1-47, February.

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