Feasibility Study of Nanocrystalline-Ribbon Cores for Polarized Inductive Power Transfer Pads
Feasibility Study of Nanocrystalline-Ribbon Cores for Polarized Inductive Power Transfer Pads
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DOI：
10.1109/tpel.2019.2957774
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发表时间：
2020-07
影响因子：
6.7
通讯作者：
Daniel E. Gaona;S. Ghosh;T. Long
中科院分区：
文献类型：
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作者：
Daniel E. Gaona;S. Ghosh;T. Long
EPCOS N87或K2004等锰锌基铁氧体材料通常用作感应功率传输(IPT)应用中的磁芯。然而，铁氧体固有的脆性和低的磁通密度饱和点限制了IPT系统的性能和可靠性。本文介绍了一种用于IPT的纳米晶带状磁芯的研究。采用有限元模拟和实验验证的方法对两种材料进行了比较。介绍了用于IPT系统的纳米晶带等超薄叠层磁芯的设计。与铁氧体相比，纳米晶薄带的机械性能更坚固；它具有更高的磁导率和更高的饱和点。结果表明，将纳米晶薄带芯应用于IPT焊盘，体积减小幅度超过50%。这是由于纳米晶体的高饱和点造成的。然而，随着铁心感应涡流导致总功率损耗的增加，出现了折衷方案。效率的降低可以通过纳米晶带状磁芯的特殊几何设计来缓解。搭建了一个6.6kW的IPT系统，对设计方法进行了实验验证。
MnZn-based ferrite materials like the EPCOS N87 or K2004 are commonly used as magnetic cores in inductive power transfer (IPT) applications. However, the performance and the reliability of IPT systems are limited by ferrite's intrinsic brittleness and low flux density saturation point. In this article, a study of nanocrystalline-ribbon-based magnetic cores for IPT applications is presented. Finite element method (FEM) simulations and experimental validations are used to compare both materials. The design of ultrathin laminated cores such as nanocrystalline ribbons for IPT systems is presented. Compared to ferrite, nanocrystalline ribbon is mechanically more robust; it has a higher magnetic permeability and a higher saturation point. Results show that nanocrystalline ribbon cores achieve more than a $\text{50}\%$ volume reduction when used in IPT pads. This is due to nanocrystalline's high saturation point. However, a compromise arises as the total power loss increases due to the induced eddy currents in the core. The reduction of efficiency can be mitigated by special geometrical designs of the nanocrystalline ribbon cores. A 6.6-kW IPT system has been built for experimental validation of the design methodology.