Leakage magnetic field reduction from Wireless Power Transfer system embedding new eddy current-based shielding method
Leakage magnetic field reduction from Wireless Power Transfer system embedding new eddy current-based shielding method
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DOI：
10.1109/edpe.2015.7325300
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发表时间：
2015-11
期刊：
影响因子：
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通讯作者：
Yoshiki Yashima;H. Omori;T. Morizane;N. Kimura;M. Nakaoka
中科院分区：
文献类型：
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作者：
Yoshiki Yashima;H. Omori;T. Morizane;N. Kimura;M. Nakaoka
最新的电动汽车（EV）相关的电力电子技术作为解决能源和环境问题的有效方案之一，引起了人们的特别兴趣。为了在私人住宅和公共建筑的车库中实现有前途的EV电池充电设备及其EMS基础设施，从实用的角度来看，基于无线电力传输（WPT）的车载充电器（OBC）更合适和可接受。作者已经开发出具有成本效益的WPT-OBC嵌入电压馈电准谐振ZVS高频逆变器与单个IGBT开关，其工作条件下的PWM依赖PFM控制方案。实际上，WPT组件发射的漏磁场暴露应遵循ICNIRP的可行指南。本文提出了一种新的概念磁屏蔽方法，它能够减少从无线感应功率传输（IPT）组件的漏磁场暴露。应注意，该方法基于组合磁屏蔽实现，其利用磁性材料的磁通量路径概念和感应到导电板中的磁场抵消原理涡流。此外，漏磁屏蔽技术在WPT的有效性证明了分析的考虑和实验观测数据。
The latest Electric Vehicles (EV)-related power electronics have attracted special interest as one of effective solutions to energy and environmental issues. In order to implement a promising EV battery charging equipment and its EMS infrastructures for carports in private houses and public buildings, Wireless Power Transfer (WPT)-based on-board chargers (OBC) are more suitable and acceptable from a practical point of view. The authors have developed cost-effective WPT-OBC embedding the voltage-fed quasi-resonant ZVS high-frequency inverter with a single IGBT switch, which operates under the condition of PWM-dependent PFM control scheme. In actual, leakage magnetic field exposure emitted from WPT assembly should follow the feasible guideline of ICNIRP. This paper presents a new conceptual magnetic shielding method which is able to reduce the leakage magnetic field exposure from the wireless Inductive Power Transfer (IPT) assembly. It is noted that this method is based on the combined magnetic shielding implementation which makes use of both magnetic flux path concept by magnetic material and magnetic field cancellation principle eddy current induced into the conductive plates. Furthermore, the effectiveness of the leakage magnetic shielding technique in WPT is proven by the analytical considerations and experimentally-observed data.