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Article type: Research Article
Authors: Liu, Guangdoua | Wang, Yanzhea; * | Xu, Xingpinga | Ming, Wuyib
Affiliations: [a] College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao 266580, Shandong, China | [b] Department of Electromechanical Science and Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, Henan, China
Correspondence: [*] Corresponding author: Yanzhe Wang, College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao 266580, Shandong, China. Tel.: +86 13625425048; Fax: +86 0532 86983300; E-mail: [email protected].
Abstract: In this paper, the changing of magnet shape in Halbach magnet array of planar motor is analyzed for the magnetic flux density. It is the rectangular magnets that are replaced by pyramidal magnets. The magnetic flux density of Halbach magnet array with rectangular magnets is derived by Fourier series and scalar potential. The magnetic flux density of pyramidal magnet array is obtained through superposition and dividing the magnet array in several layers. Then the harmonic model has good agreement with the finite element model (FEM) by comparing the z-component of magnetic flux density. The division layer p is decided by analyzing the amplitude error of z-component of magnetic flux density between harmonic and FEM. The pyramidal magnet array is analyzed from the items such as the waveform, peak value and total harmonic distortion (THD) of z-component of magnetic flux density. Above all, the smaller the rotation angle is, the bigger the peak value of z-component of magnetic flux density will be obtained and the smaller the total harmonic distortion will be simultaneously achieved.
Keywords: Halbach array, peak value, planar motor, pyramidal magnet, THD
DOI: 10.3233/JAE-170090
Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 56, no. 1, pp. 63-73, 2018
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