Analysis on safety issues of capacitive power transfer system
Analysis on safety issues of capacitive power transfer system
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DOI：
10.3233/jae-160046
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发表时间：
2017-01-01
影响因子：
0.6
通讯作者：
Dai, Xin
中科院分区：
文献类型：
--
作者：
Su, Yu-Gang;Ma, Jun-Hao;Dai, Xin
电容式电能传输（CPT）技术是一种利用电场实现无线电能传输的新技术。虽然耦合板上有绝缘层，但耦合板周围仍存在泄漏电场。因此，当人体接触放置在耦合板周围的导体时，可能存在触电危险。针对这一问题，建立了金属导体和耦合板的等效电容模型。此外，引入人体阻抗模型，得到了人体接触导体时CPT系统的等效电路。推导了全桥串联谐振CPT系统四个耦合板电压的计算公式。并给出了不同耦合板上导体的分布电压。实验结果验证了理论分析的正确性。
The capacitive power transfer (CPT) technology is a novel solution to transfer power wirelessly by using electric field. Although there is an insulating layer on the coupling plates, leakage electric field is still existing around the plates. So there might have an electric shock hazard when a human body touches the conductors placed around the coupling plates. To solve this problem, an equivalent capacitor model of the metallic conductor and the coupling plate is established. Besides, a human body impedance model is introduced to obtain equivalent circuits of the CPT system when a human touches the conductor. The formulas of the four coupling plate voltages are derived for a full bridge series resonant CPT system. Moreover, the distributed voltages of the conductor placed above different coupling plates are given. The correctness of the theoretical analysis has been verified by the experimental results.