抗磁材料磁悬浮的理论模拟

The magnetic levitation of diamagnetic materials

抗磁材料磁悬浮磁结构简单,有广泛的应用前景.本文研究了抗磁性材料在2×2永磁铁阵列表面附近的磁悬浮.用MATLAB模拟了H的z方向分量Hz及其导数.Hz和-Hz.Hz在距离永磁铁表面不同高度的二维分布.因为Fz=-χVHz.Hz,所以-Hz.Hz的分布能反映出抗磁材料在磁场中的受力情况.三维模拟和实验表明,抗磁材料在稳恒磁场中能稳定悬浮.我们还得到了抗磁材料悬浮高度和抗磁材料尺寸的关系.

Diamagnetic levitation, whose compactness and simplicity are important, thas a bright application prospect. This paper presents a study of the magnetic material＇s suspension in magnetic field of 2×2 magnet array. First, we use MATLAB to get the magnetic field of any position near the magnet array. Then, we obtain quite clear figures of Hz,Hz, -HzHz at any height above the surface of the magnet array. The experimental results by virtue of a thin graphite piece levitating above the center of the 2×2 magnets array confirm the theoretical model. Due to Fz =-xVHzHz, -HzHz indicates the force of the material in the magnetic field. The results of the experiment and theory indicate that the steady levitation of diamagnetic materials above magnet arrays can be well realized. We also get the relationship between the suspension height of graphite pieces and the size of graphite pieces.