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A Compact Spatial Free-Positioning Wireless Charging System for Consumer Electronics Using a Three-Dimensional Transmitting Coil

Author

Listed:
  • Ziwei Liang

    (National Active Distribution Network Technology Research Center, School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
    Department of Electrical & Computer Engineering, San Diego State University, San Diego, CA 92182, USA)

  • Jianqiang Wang

    (National Active Distribution Network Technology Research Center, School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
    Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing Jiaotong University, Beijing 100044, China)

  • Yiming Zhang

    (Department of Electrical & Computer Engineering, San Diego State University, San Diego, CA 92182, USA)

  • Jiuchun Jiang

    (Shenzhen Precise Testing Technology Co., Ltd, Shenzhen 518000, China)

  • Zhengchao Yan

    (Department of Electrical & Computer Engineering, San Diego State University, San Diego, CA 92182, USA
    School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China)

  • Chris Mi

    (Department of Electrical & Computer Engineering, San Diego State University, San Diego, CA 92182, USA)

Abstract

A compact spatial free-positioning wireless charging system with a novel three-dimensional (3D) transmitting (Tx) coil is proposed to charge consumer electronics in the working area. Because of the strengthened electromagnetic field generated by the proposed 3D Tx coil in the space, this system can charge consumer electronics wirelessly with great tolerance to positional and angular misalignments between the transmitter and receiver. Benefiting from the compact design of the 3D Tx coil, the system can be easily embedded in some corners of office furniture/cubic panels, which will not cause any extra working space consumption when charging devices. The inductor-capacitor-capacitor (LCC) compensation circuit on the Tx side can achieve constant current output, which is independent of load condition and can protect the transmitter. With the LCC compensation circuit, the MOSFETs of the H-bridge high-frequency inverter realized zero voltage switching (ZVS). The small-sized planar receiving (Rx) coil and series (S) compensation circuit is applied to achieve compact receiver design. The theoretical and experimental results show that the spatial free-positioning wireless charging prototype can transfer 5 W to the small-sized receiver in around 350 mm × 225 mm × 200 mm 3D charging area and achieve the highest efficiency of 77.9%.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:8:p:1409-:d:222154
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    References listed on IDEAS

    as
    1. Sizhao Lu & Xiaoting Deng & Wenbin Shu & Xiaochao Wei & Siqi Li, 2018. "A New ZVS Tuning Method for Double-Sided LCC Compensated Wireless Power Transfer System," Energies, MDPI, vol. 11(2), pages 1-14, February.
    2. Zhengchao Yan & Yiming Zhang & Baowei Song & Kehan Zhang & Tianze Kan & Chris Mi, 2019. "An LCC-P Compensated Wireless Power Transfer System with a Constant Current Output and Reduced Receiver Size," Energies, MDPI, vol. 12(1), pages 1-14, January.
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    Cited by:

    1. 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.

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