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A Novel Multimodal Optimization Algorithm Applied to Electromagnetic Optimization

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4 Author(s)
Dong-Kyun Woo ; Sch. of Electr. Eng., Seoul Nat. Univ., Seoul, South Korea ; Jong-Ho Choi ; Ali, M. ; Hyun-Kyo Jung

The selection of optimum parameters in electromagnetic design usually requires optimization of multimodal, nonlinear functions. This leads to extensive calculations which pose a huge inconvenience in the design process. This paper proposes a novel algorithm for dealing efficiently with this issue. The proposed algorithm interprets the problem as an unexplored terrain for climbing. Through the use of contour line concept coupled with Kriging, the algorithm finds out all the peaks in the problem domain with as few function calls as possible. The efficiency of the proposed algorithm is demonstrated by application to conventional test functions. In this paper, the simulation results show that skewing does not necessarily reduce the cogging torque but may cause it to increase for certain pole-arc to pole-pitch ratio. The developed algorithm is applied to the magnet shape optimization of an axial flux permanent magnet synchronous machine and the cogging torque was reduced to 79.8% of the initial one.

Published in:

Magnetics, IEEE Transactions on  (Volume:47 ,  Issue: 6 )

Date of Publication:

June 2011

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