Calculation and optimization of magnetic focusing field of hemispherical coil array

被引：0
|
作者：
Fu X. [1 ]
Fu X. [1 ]
Sun J. [2 ]
Chen W. [1 ]
机构：
[1] School of Electrical Engineering, Southeast University, Nanjing
[2] School of Biological Science and Medical Engineering, Southeast University, Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2020年 / 50卷 / 04期
关键词：
Analytic calculation; Genetic algorithm; Magnetic focusing coil array; Magnetic focusing field; Optimal design;
D O I：
10.3969/j.issn.1001-0505.2020.04.013
中图分类号：
学科分类号：
摘要：
To enhance the electromagnetic performance of the focusing device and improve the medical effects of transcranial magnetic stimulation, tumor therapy and other fields, a hemispherical coil array is presented. An analytical model of the spatial focusing magnetic field was established based on the theory of an electromagnetic field. The electromagnetic field of the hemispherical coil array was calculated by the finite element method and analytical method. The magnetic field distribution was revealed, and the sensitivity evaluation of the main structural parameters was given. Furthermore, the parameters of the coil array were optimized by NSGA-Ⅱ based on the optimization objectives and constraints as well as the analytical model above. The design results satisfying the thermal and magnetic focusing requirements were obtained. The principle prototype of the focusing coil array was established and the experimental research was carried out. The comparison of optimization, finite element and experimental results shows that the calculation error of the analytical model is about 2% to 3%. The configuration of the hemispherical coil array is reasonable and is able to generate the magnetic focusing field, which meets the requirements of range, gradient and amplitude. In addition, the magnetic focusing performance of the coil array optimized by NSGA-Ⅱ is greatly improved. © 2020, Editorial Department of Journal of Southeast University. All right reserved.
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页码：689 / 697
页数：8
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