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Air-gap magnetic field design optimization for U-shaped ironless permanent magnet linear synchronous motors

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2 Author(s)
Peng Sun ; Department of Mechanical Design and Manufacturing, China Agricultural University, Beijing, 100083, China ; Huixing Zhou

A U-shaped ironless permanent magnet linear synchronous motor, made by our group, is studied in this paper. The magnetic flux density stabilization is a primary problem, as the air-gap magnetic field with normal component of flux density of longitudinal sine and latitudinal uniformity is required for many precise positioning systems. We proposed a design optimization to improve the magnetic flux density and reduce magnet volume by defining a flexible objective function, where a genetic algorithm was used to find the optimal motor dimensions. The design optimization was verified by a layered finite element analysis, which could lower the complexity of the magnetic field analysis. And experimental results of the prototype were provided to illustrate the effectiveness of the proposed idea.

Published in:

Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on

Date of Conference:

17-20 Oct. 2008