A Self-Resonant Foreign Object Detection System for Metal and Living Object Detection in Electric Vehicle Wireless Charging Systems

被引：0
|
作者：
Zheng, Yingyao [1 ]
Zhou, Yicheng [1 ]
Xie, Ronghuan [1 ]
Mao, Xingkui [1 ]
Chen, Xiaoying [1 ]
Cheng, Xiangpeng [1 ]
Zhang, Yiming [1 ]
机构：
[1] Fuzhou Univ, Sch Elect Engn & Automat, Fuzhou 350108, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2025年 / 40卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Coils; Inductive charging; Capacitors; Capacitance; Image edge detection; Resistance; Object detection; Steel; Copper; Resonant frequency; Electric vehicles (EVs); foreign object detection (FOD); self-resonant; wireless charging;
D O I：
10.1109/TPEL.2025.3532606
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In the application process of wireless charging for electric vehicles, foreign object detection (FOD) is one of the necessary measures to address safety issues. This letter proposes a self-resonant FOD method for metal object (MO) and living object (LO) detection. It is possible to detect an MO and an LO without being affected by the 85-kHz power transmission, without the need for a detection coil specifically designed to decouple from the power transmission coil and a high-pass filter. Each self-resonant detection coil consists of a unipolar coil and a comb-shaped capacitor plate. This letter describes a method that can identify an MO and an LO by scanning frequencies within a small range and detecting the slope of the output voltage as it changes with frequency. When there are no foreign objects, the absolute value of the output voltage slope is less than 0.15. The voltage slope less than -0.15 indicates the presence of MOs, while a slope greater than 0.15 indicates the presence of an LO. To verify the feasibility of the proposed method, an experimental prototype has been constructed.
引用
收藏
页码：6459 / 6463
页数：5
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