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Efficiency Improvement of Wireless Charging System Based on Double-layer Multi-transmitters
ID：32 View Protection：ATTENDEE Updated Time：2025-11-03 12:32:34 Hits：398 Oral Presentation

Start Time：2025-11-09 09:15（Asia/Shanghai）

Duration：15min

Session：S4 4. Wireless power transfer technology » S44.Wireless power transfer technology

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Abstract
In this paper, a double-layer multi-transmitters (TXs) and its activation strategy with high transmission efficiency and misalignment tolerance is proposed for a wireless charging system. Firstly, the TXs is a two-layer coils staggered arrangement, with a relatively uniform magnetic field and low leakage flux, which can effectively enhance the anti-misalignment performance. The receiving coil (RX) is designed with a minimum outer radius to ensure the rated power pickup. Then, the optimal transmission efficiency condition is derived, which is related to TXs current, mutual inductance, and the activated TXs number. Based on the optimal efficiency condition, TXs activation strategy is determined by further detecting the voltage and current on the primary side and load to identify mutual inductance. An experimental prototype is carried out to validate the proposal. The results show that the proposed system can transmit a constant power of 500W in misalignments, with a maximum efficiency of 91%.
 
Keywords
multi-transmitters wireless power transfer, optimal efficiency, coil activation, double-layer
Speaker
Yanling Li
Southwest Jiaotong University

Submission Author
chunlong li China Electric Power Research Institute；Electric Power Intelligent Sensing Technology Laboratory of State Grid Corporation
Xin Wang State Grid Xinjiang Information & Telecommunication Company and State Grid Xinjiang Electric Power Co., Ltd
Hui Huang China Electric Power Research Institute；Electric Power Intelligent Sensing Technology Laboratory of State Grid Corporation
Zhidong Gao China Electric Power Research Institute；Electric Power Intelligent Sensing Technology Laboratory of State Grid Corporation
Weiqiang Liu CRRC Zhuzhou Institute Co., LTD
Yanling Li Southwest Jiaotong University
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Important Date

  • Conference Date

    Nov 07

    2025

    to

    Nov 09

    2025

  • Oct 30 2025

    Draft paper submission deadline

  • Nov 10 2025

    Registration deadline

Sponsored By
IEEE西南交通大学IAS学生分会
Organized By
西南交通大学电气工程学院
SPACI车网关系研究室
四川大学电力系统稳定与高压直流输电研究团队
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