3-D topology optimization of magnetic cores for wireless power transfer with double-sided winding coils

Article type: Research Article

Authors: Otomo, Yoshitsugu^a; | Igarashi, Hajime^a

Affiliations: [a] Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan

Correspondence: [*] Corresponding author: Yoshitsugu Otomo, Graduate School of Information Science and Technology, Hokkaido University, Sapporo, 060-0814, Japan. E-mail: otomo@em.ist.hokudai.ac.jp

Abstract: This paper presents three-dimensional topology optimization of magnetic cores for wireless power transfer with double-sided winding coils. In this optimization, the magnetic core shape is represented by the linear combination of the normalized Gaussian functions. The core shape is optimized so that the coupling coefficient between the transmitting and receiving coils is maximized. Moreover, robustness against misalignment between the coils is taken into account in the optimization. It is found that the optimized core shape effectively increases the net magnetic flux interlinked with the receiving coil, and outperforms the conventional core shapes.

Keywords: Electric vehicle, genetic algorithm, robust optimization, topology optimization, wireless power transfer

DOI: 10.3233/JAE-191110

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 60, no. S1, pp. S115-S123, 2019