Title :
Modeling, Analyzing, and Parameter Design of the Magnetic Field of a Segmented Halbach Cylinder
Author :
Shi, Tingna ; Qiao, Zhaowei ; Xia, Changliang ; Li, Hongfeng ; Song, Zhanfeng
Author_Institution :
Sch. of Electr. Eng. & Autom., Tianjin Univ., Tianjin, China
fDate :
5/1/2012 12:00:00 AM
Abstract :
The Halbach magnet array has become more and more attractive in many electromagnetic engineering domains such as electrical motors for its potential features such as self-shielding and providing sinusoidal field distribution. This paper develops analytical models formulated in polar coordinates for predicting the field distribution of a segmented Halbach magnet cylinder with or without back iron. Based on the analytical models, the relationships between the air-gap flux density and four design parameters including pole-pair number, segment number per pole, permanent-magnet radial dimension, and air-gap length are analyzed. Further, the Taguchi method is employed to identify the settings of design parameters and determine the parameters which have a significant effect on the field distribution. The analytical models are verified by taking advantage of the finite-element method (FEM), which shows that all the results can be of considerable use in the design of permanent-magnet machines.
Keywords :
Taguchi methods; finite element analysis; machine insulation; machine theory; permanent magnet machines; Halbach magnet array; Taguchi method; air-gap flux density; electrical motors; electromagnetic engineering; finite-element method; magnetic field; permanent magnet machines; permanent-magnet radial dimension; polar coordinates; pole-pair number; segment number per pole; segmented Halbach magnet cylinder; sinusoidal field distribution; Air gaps; Analytical models; Finite element methods; Magnetic analysis; Magnetic fields; Magnetic flux; Rotors; Halbach array; Halbach cylinder; Taguchi method; magnetic field; permanent magnet;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2174372