Yanwen Hu , Tingzhen Heng , Tingrong Zhang , Wenying Zhou , Yaodong Ma
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Abstract
This paper proposes a comprehensive evaluation method of magnetic coupling resonance wireless power transfer (MCRWPT) system with a single-layer ferrite shielding structure. The method comprehensively considers the system’s efficiency, economy and safety, transfer efficiency, weight, and magnetic flux leakage. By constructing an objective function, encoding the ferrite region, the shielding structure is optimized using a genetic algorithm. The influence of different orders and construction methods of ferrite encoding arrays on the comprehensive optimization results of the system is studied. The research results indicate that the 6th-order rotational symmetry construction approach has better optimization performance than the 6th-order axisymmetric construction approach, the 8th-order rotational symmetry construction approach has better optimization performance than the 6th-order rotational symmetry construction approach. Compared with the ferrite full shielding structure, the number of ferrites used in the 8th-order rotational symmetric optimization structure has been reduced by 56.25 %. The experimental results show that the transfer efficiency of the MCRWPT system with an 8th-order ferrite shielding structure reaches 79.55 % at a transmission distance of 150 mm. The optimized shielding structure not only improves the overall performance of the MCRWPT system but also has high economic benefits.
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The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public.
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