Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (8): 1078-1082.DOI: 10.12068/j.issn.1005-3026.2014.08.004

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Optimal Design of Eccentric Magnetic Pole for Permannent Magnet Drive〓

SHI Songning, WANG Dazhi, SHI Tongyu   

  1. School of Information Science & Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2013-10-20 Revised:2013-10-20 Online:2014-08-15 Published:2014-04-11
  • Contact: SHI Songning
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Abstract: A permanent magnet drive (PMD) with eccentric magnetic pole was designed. The sample space was built by 3D finite element simulation, and a nonlinear regression model of the PMD was developed using the least squares support vector machine (LSSVM). Based on the model, the minimal eddy current loss and maximal output torque were selected as optimal objectives. The optimal parameters of the PMD were then derived through particle swarm optimization (PSO) searching. The results show that the parameter optimization method based on LSSVM and PSO algorithms is feasible by comparing the radial magnetic flux and eddy current densities of the improved PMD with that of the intrinsic one. The improved structure of the eccentric magnetic pole optimizes eddy current path and reduces stray current, thus increases the work efficiency.

Key words: permanent magnet drive, finite element method, least squares support vector machine, particle swarm algorithm, optimal design

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