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Analysis and Design of Asymmetric Mid-Range Wireless Power Transfer System with Metamaterials

Author

Listed:
  • Yingqin Zeng

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430000, China)

  • Conghui Lu

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430000, China)

  • Cancan Rong

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430000, China)

  • Xiong Tao

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430000, China)

  • Xiaobo Liu

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430000, China)

  • Renzhe Liu

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430000, China)

  • Minghai Liu

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430000, China)

Abstract

In a wireless power transfer (WPT) system, the power transfer efficiency (PTE) decreases sharply with the increase in transfer distance. Metamaterials (MMs) have shown great potential to enhance PTE in mid-range WPT systems. In this paper, we propose two MM slabs of a 3 × 3 array to enhance the magnetic coupling. The MM unit cell was designed by using square spiral patterns on a thin printed circuit board (PCB). Moreover, the asymmetric four-coil WPT system was designed and built based on the practical application scenario of wireless charging for unmanned devices. The simulation and experimental results show that two MM slabs can enhance power transmission capability better than one MM slab. By optimizing the position and spacing of two MM slabs, the PTE was significantly improved at a mid-range distance. The measured PTEs of a system with two MM slabs can reach 72.05%, 64.33% and 49.63% at transfer distances of 80, 100 and 120 cm. When the transfer distance is 100 cm, the PTE of a system with MMs is 33.83% higher than that without MMs. Furthermore, the receiving and load coils were integrated, and the effect of coil offset on PTE was studied.

Suggested Citation

  • Yingqin Zeng & Conghui Lu & Cancan Rong & Xiong Tao & Xiaobo Liu & Renzhe Liu & Minghai Liu, 2021. "Analysis and Design of Asymmetric Mid-Range Wireless Power Transfer System with Metamaterials," Energies, MDPI, vol. 14(5), pages 1-10, March.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:5:p:1348-:d:508835
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    References listed on IDEAS

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    1. Chaoqiang Jiang & K. T. Chau & Chunhua Liu & Christopher H. T. Lee, 2017. "An Overview of Resonant Circuits for Wireless Power Transfer," Energies, MDPI, vol. 10(7), pages 1-20, June.
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