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利用FEMLAB模擬微電磁石的磁場區域

Modeling the magnetic field of a micro-electromagnet in FEMLAB

  • 摘要: 利用FEMLAB軟件模擬出在2D和3D的情況下微電磁石的電磁感應對磁場強度的影響.因為在3D界面下不能完全將實際模型重建,采用縮小實體的方法,將縮小后的模型在2D環境下模擬,可以顯示出與大空間范圍構造相似的仿真結果.3D仿真結果顯示的大體結構及空間范圍的情況與2D仿真結果大致相同,且3D仿真結果的誤差在正常情況下至少為10%,因此3D與2D仿真環境下的磁體結構是可以比較的.

     

    Abstract: In 2D and 3D, the magnetic flux density from a micro electromagnet used for magnetic bio-separation was simulated with FEMLAB software. Due to the complexity of the structure, a fine meshing of the 3D structure is not possible. In order to minimize the memory consumption by reducing the size of the space domain surrounding the magnetic structure and by using a relatively coarse mesh, the effects of reducing the size of the space domain and using a coarse mesh that it is possible to perform a reference simulation with a large space domain and a fine mesh, and the errors made by the approximations were quantified. 3D simulations were carried out with space domain and coarse meshing conditions identical to those in 2D simulations, and it is shown that the approximations in 3D simulations result in an underestimation of the order of 10%. The magnetic structure of 3D simulations can be compared with that of 2D simulations.

     

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