Design and optimizations of solenoid magnetic structure for inductive power transfer in EV applications

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society Pub Date : 2015-11-01 DOI:10.1109/IECON.2015.7392306

Yunyu Tang, Fan Zhu, Yuxi Wang, Hao Ma

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引用次数: 16

Abstract

Based on magnetic induction, wireless power transfer have been proved to be promising in many applications, especially in EV charging systems. The coupling performance of loosely coupled transformers determines the overall feasibility of the whole systems. Considering volume, cost and coupling properties, a solenoid magnetic structure of 400mm*600mm with a 200mm air gap is utilized to transfer power in this study. By FEM simulation tools, the distance of wires and the coverage length are discussed to find the best coupling design. In addition, the position of the magnetic stripe cores is analyzed when taking account of the system cost. Moreover, additional shielding devices, which are made of aluminum, are designed to eliminate the back leakage magnetic flux. In order to improve the coupling performance, flux guiding ferrites are also added into the shielding devices to guide more leakage to flow to the secondary windings. Simulation results indicate the proposed design can increase the coupling coefficient k dramatically. Also, experimental results show great agreement with the simulation results.

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电动汽车感应功率传输电磁结构设计与优化

基于磁感应的无线电力传输已被证明在许多应用中具有广阔的前景，特别是在电动汽车充电系统中。松耦合变压器的耦合性能决定了整个系统的整体可行性。考虑到体积、成本和耦合性能，本研究采用400mm*600mm的电磁结构，气隙为200mm来传递功率。利用有限元仿真工具，对导线间距和覆盖长度进行了分析，找到了最佳的耦合设计。此外，在考虑系统成本的情况下，对磁条磁芯的位置进行了分析。此外，额外的屏蔽装置，这是由铝制成的，旨在消除背漏磁通。为了提高耦合性能，还在屏蔽装置中加入导磁铁氧体，引导更多的漏电流向二次绕组。仿真结果表明，该设计能显著提高耦合系数k。实验结果与仿真结果吻合较好。

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IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

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