Evaluation of Permanent Magnet Distribution Schemes for Toroid Power Inductor with Increased Saturation Current Using 3D Physical Models
Evaluation of Permanent Magnet Distribution Schemes for Toroid Power Inductor with Increased Saturation Current Using 3D Physical Models
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DOI：
10.1109/apec.2019.8722198
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发表时间：
2019-03
期刊：
影响因子：
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通讯作者：
Zhiyong Xia;J. A. Abu Qahouq;S. Kotru
中科院分区：
文献类型：
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作者：
Zhiyong Xia;J. A. Abu Qahouq;S. Kotru
本文介绍并评估了不同永磁体 (PM) 分布方案对永磁环形功率电感器饱和性能的影响。通过将PM适当地放置在功率电感的间隙中，绕组电流感应的磁通可以被一个或多个PM片感应的磁通部分或全部抵消。这会导致功率电感器的饱和电流增加。针对功率电感器提出了多 PM 分布方案，以实现改进且更均匀的磁通消除，从而实现更高的饱和电流。使用 ANSYS/Maxwell 开发的 3D 物理模型获得的结果来评估功率电感器中的几种 PM 分布模式。比较了分配方案对功率电感器性能指标的影响。通过使用本文中的 3D 物理模型适当选择或调整气隙尺寸和 PM 尺寸，多 PM 分布方法可以产生更高的饱和电流，而电感值几乎没有下降。
Effects of different permanent magnet (PM) distribution schemes on the saturation performance of a permanent magnet toroid power inductor are presented and evaluated in this paper. By appropriately placing the PM in the gap of the power inductor, the flux induced by the winding current can be cancelled partially or completely by the flux induced by one or multiple PM pieces. This can lead to increase in the saturation current of the power inductor. Multi-PM distribution schemes are proposed for a power inductor in order to allow for improved and more uniform flux cancellation and therefore higher saturation current. Several PM distribution patterns in the power inductor are evaluated using results obtained from 3D physical models which are developed using ANSYS/Maxwell. The distribution schemes are compared in terms of their effects on the performance metrics of the power inductor. By appropriately selecting or tuning the air gap sizes and the PM dimensions using the 3D physical models in this paper, the multi-PM distribution method can yield higher saturation current with almost no drop in the inductance value.