Search Region Management Method for Local Search Algorithm Employing Design Optimization of Brushless DC Motor

The optimal design of electric machines requires a significant amount of computation time, since the design is usually performed based on finite-element analysis (FEA) for better accuracy. For this reason, the development of an optimization algorithm is regarded as a prerequisite to reduce the numbe...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2016-03, Vol.52 (3), p.1-6
Main Authors: Lee, Tae-Yong, Trung, Pham Xuan, Kim, Jong-Wook, Kim, Yong-Jae, Jung, Sang-Yong
Format: Article
Language:English
Subjects:
Algorithm design and analysis
Algorithms
Brushless DC motors
Design analysis
Design Optimization
Direct current
Electric Machines
Electric motors
Finite Element Analysis
Finite element method
Magnetism
Mathematical analysis
Motors
Optimization
Product design
Reflective binary codes
Reluctance motors
Search algorithms
Searching
Torque
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Summary:The optimal design of electric machines requires a significant amount of computation time, since the design is usually performed based on finite-element analysis (FEA) for better accuracy. For this reason, the development of an optimization algorithm is regarded as a prerequisite to reduce the number of objective function call, which is directly related to computation time. The local search algorithm does not guarantee that the global optimum solution can be searched effectively. Therefore, in this paper, we introduce the novel optimization method, search region management (SRM), to improve the efficiency of the local search algorithm. SRM uses a guided random bit generation based on Gray code for the region selection when the local search iterates the optimum search process for a multi-start. In addition, the SRM saves and manages the information of previous searched points to prevent overlapping calculation and to increase the effectiveness of the local search during every iteration process. To clarify the effectiveness of the proposed method for electric machine design, it is applied to the optimal design of brushless dc motor coupled with FEA minimizing torque ripple.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2015.2482966