Topology optimization of magnetic cores for WPT using the geometry projection method
Topology optimization of magnetic cores for WPT using the geometry projection method
复制标题
使用几何投影法对 WPT 磁芯进行拓扑优化
DOI：
10.1108/compel-02-2021-0064
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Igarashi Hajime
中科院分区：
文献类型：
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作者：
Otomo Yoshitsugu;Igarashi Hajime
本研究的目的是寻找一种最佳的磁芯形状，该形状可以抵抗无线电力传输（WPT）设备的发射线圈和接收线圈之间的不对准。在优化过程中，作者在最大限度地提高耦合系数的同时，尽量减少线圈周围的漏磁，以保证WPT装置的安全。本研究提出了一种新的WPT器件拓扑优化方法，利用几何投影法优化磁芯形状。这种方法便于棒状磁芯的生成，因为材料的分布是由一组基本棒状表示的。结果表明，通过拓扑优化得到的优化铁芯形状有效地增加了与接收线圈相连的净磁通，优于传统铁芯。在之前的拓扑优化方法中，材料分布由高斯函数的线性组合表示。然而，这种方法通常不会得到棒状岩心，而棒状岩心在WPT中被广泛使用。在这项研究中，作者提出了一种新的WPT器件拓扑优化方法，该方法使用几何投影用于结构优化，如梁和悬臂形状。
PurposeThe purpose of this study is to search for an optimal core shape that is robust against misalignment between the transmitting and receiving coils of the wireless power transfer (WPT) device. During the optimization process, the authors maximize the coupling coefficients while minimizing the leakage flux around the coils to ensure the safety of the WPT device.Design/methodology/approachIn this study, a novel topology optimization method for WPT devices using the geometry projection method is proposed to optimize the magnetic core shape. This method facilitates the generation of bar-shaped magnetic cores because the material distribution is represented by a set of elementary bars.FindingsIt is shown that an optimized core shape, which is obtained through topology optimization, effectively increases the net magnetic flux interlinked with the receiving coil and outperforms the conventional core.Originality/valueIn the previous topology optimization method, the material distribution is represented by a linear combination of Gaussian functions. However, this method does not usually result in bar-shaped cores, which are widely used in WPT. In this study, the authors propose a novel topology optimization method for WPT devices using geometry projection that is used in structural optimization, such as beam and cantilever shapes.