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http://dx.doi.org/10.3795/KSME-A.2007.31.1.043

Optimal Coil Configuration Design Methodology Using the Concept of Equivalent Magnetizing Current  

Kim, Woo-Chul (서울대학교 대학원 기계항공공학부)
Kim, Min-Tae (서울대학교 대학원 기계항공공학부)
Kim, Yoon-Young (서울대학교 기계항공공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.31, no.1, 2007 , pp. 43-49 More about this Journal
Abstract
A new electric coil design methodology using the notion of topology optimization is developed. The specific design problem in consideration is to find optimal coil configuration that maximizes the Lorentz force under given magnetic field. Topology optimization is usually formulated using the finite element method, but the novel feature of this method is that no such partial differential equation solver is employed during the whole optimization process. The proposed methodology allows the determination of not only coil shape but also the number of coil turns which is not possible to determine by any existing topology optimization concept and to perform single coil strand identification algorithm. The specific applications are made in the design of two-dimensional fine-pattern focusing coils of an optical pickup actuator. In this method, the concept of equivalent magnetizing current is utilized to calculate the Lorentz force, and the optimal coil configuration is obtained without any initial layout. The method is capable of generating the location and shape of turns of coil. To confirm the effectiveness of the proposed method in optical pickup applications, design problems involving multipolar permanent magnets are considered.
Keywords
Equivalent Magnetizing Current; Topology Optimization; Single Strand Coil; Lorentz Force;
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