期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 449, 期 -, 页码 571-581出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2017.10.109
关键词
Permanent magnet (PM); Ferromagnetic material; Topology optimization; Magnetic field; Finite element methods
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2016 R1D1A1B03931138]
This paper presents multi-material topology optimization for the co-design of permanent magnet segments and iron material. Specifically, a co-design methodology is proposed to find an optimal border of permanent magnet segments, a pattern of magnetization directions, and an iron shape. A material interpolation scheme is proposed for material property representation among air, permanent magnet, and iron materials. In this scheme, the permanent magnet strength and permeability are controlled by density design variables, and permanent magnet magnetization directions are controlled by angle design variables. In addition, a scheme to penalize intermediate magnetization direction is proposed to achieve segmented permanent magnet arrays with discrete magnetization directions. In this scheme, permanent magnet strength is controlled depending on magnetization direction, and consequently the final permanent magnet design converges into permanent magnet segments having target discrete directions. To validate the effectiveness of the proposed approach, three design examples are provided. The examples include the design of a dipole Halbach cylinder, magnetic system with arbitrarily-shaped cavity, and multi-objective problem resembling a magnetic refrigeration device. (C) 2017 Elsevier B.V. All rights reserved.
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