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Analysis and Optimization of a New 2-D Magnet Array for Planar Motor

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7 Author(s)
Wei Min ; Dept. of Precision Instrum. & Mechanology, Tsinghua Univ., Beijing, China ; Ming Zhang ; Yu Zhu ; Badong Chen
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This paper presents a new 2-D permanent-magnet array for a planar motor, in which the angle between the magnetization directions of any two adjacent magnets is 45??. The harmonic model for flux density distribution of the array is solved by the scalar magnetic potential equation and validated by the finite-element method. An analytical model for real-time control is derived by taking the first harmonic of the magnetic flux density distribution. The ignored higher harmonics in z-component of the magnetic flux density distribution is minimized by the genetic algorithm such that the analytical model becomes more accurate. Compared with the well-known Halbach magnet array, the proposed magnet array has lower higher harmonic components and higher z -component of the magnetic flux density, which will reduce the force ripples of the planar motor.

Published in:

Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 5 )

Date of Publication:

May 2010

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