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Magnetic Positioning Technique Integrated with Near-Field Communication for Wireless EV Charging

Author

Listed:
  • Zhongnan Qian

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Rui Yan

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Zeqian Cheng

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Jiande Wu

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Xiangning He

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract

For wireless electric vehicle charging, the relative position of the primary and secondary coils has significant impacts on the transferred power, efficiency and leakage magnetic flux. In this paper, a magnetic positioning method using simultaneous power and data transmission (SWPDT) is proposed for power coil alignment. Four signal coils are installed on the primary coil to detect the secondary coil position. By measuring the positioning signal amplitudes from the four signal coils, the power coil relative position can be obtained. Moreover, all the communication needed in the positioning process can be satisfied well by SWPDT technology, and no extra radio frequency (RF) communication hardware is needed. The proposed positioning method can work properly both in power transfer online condition and in power transfer offline condition. Thus, a highly integrated wireless charging system is achieved, which features simultaneous power transfer, data transmission and position detection. A positioning experimental setup is built to verify the proposed method. The experimental results demonstrate that the positioning resolution can be maintained no lower than 1 cm in a 1060 mm × 900 mm elliptical region for a pair of 510 mm × 410 mm rectangular power coils. The three-dimensional positioning accuracy achieves up to 1 cm.

Suggested Citation

  • Zhongnan Qian & Rui Yan & Zeqian Cheng & Jiande Wu & Xiangning He, 2020. "Magnetic Positioning Technique Integrated with Near-Field Communication for Wireless EV Charging," Energies, MDPI, vol. 13(5), pages 1-22, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1081-:d:326886
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    References listed on IDEAS

    as
    1. Karam Hwang & Jaeyong Cho & Dongwook Kim & Jaehyoung Park & Jong Hwa Kwon & Sang Il Kwak & Hyun Ho Park & Seungyoung Ahn, 2017. "An Autonomous Coil Alignment System for the Dynamic Wireless Charging of Electric Vehicles to Minimize Lateral Misalignment," Energies, MDPI, vol. 10(3), pages 1-20, March.
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