Numerical Study on Magnetic Field Characteristics of Typical Permanent Magnet

Abstract:

Selecting a single piece of typical rectangular open planar magnet，with its axial magnetization, to build a finite element model. Based on ANSYS software, the article used NdFeB45 material properties, giving 100×100×10mm to fit the relationship of three-dimensional size. In the air zone as 10 times as model size, it adopted a static simulation analysis of the effect on relationship between axial magnetic distance and magnetic field strength. The magnetic field contours as simulation results, after the Origin software fitting process, obtained an equation is: ; Comparing with the formula: , which reflected the basic characteristics of permanent magnetic field, and with the numerical results by Jing-tian LI using equivalent magnetic charge method, they all appeared: the magnetic field strength exponentially decrease along with the magnetic distance increases, the magnetic field non-uniformity coefficient is of 4.628% deviation, the fitting correlation coefficient R is 0.99924; As a result of the numerical verification results, it also visually response to the magnetic field parameters of open permanent magnet.

• Periodical: Materials Science Forum (Volumes 704-705)
• Pages: 1073-1078
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.704-705.1073
• Online since: December 2011
• Authors: Chang Liang Shi, Yi Shun Zhang, Hong Guang Jiao
• Keywords: Magnetic Distance, Magnetic Field, Numerical Simulation, Rectangular Permanent Magnet

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