磁通集聚器放大磁场分布及矢量选择特性研究

主要针对T型磁通集聚器结构间隙内轴向放大磁场分布特性以及放大磁场矢量,选择性利用三维有限元静磁特性仿真分析及实验验证的方法进行了一系列的分析研究。结果表明,间隙内放大磁场分布均匀区与结构间隙区域具有相似的截面形状,该均匀区的大小与间隙截面积成正比并与间隙距离成反比。另外,通过仿真和实验验证了集聚器能够放大轴向环境磁场强度,缩小横向磁场强度,具有矢量选择特性。该结论为矢量磁传感器增大灵敏度提供了一定的应用基础。

Research on magnetic flux concentrator amplified magnetic field distribution and vector selection characteristics

The paper mainly studied distribution characteristics and vector selectivity of amplified magnetic field in the gap of T-shape magnetic flux concentrator by 3D finite element magnetostatic simulation and experimental verification. The result shows that the amplified homogeneous magnetic field distributionspace and the gap space have the similar cross-section shape. The homogeneous distribution space size increases with the cross-sectional area increasing and the gap distance decreasing. The experimental result verifies that T-shape magnetic flux concentrator can amplify the longitudinal magnetic field and reduce the transverse magnetic field. The conclusion provides application foundation for increasing the vector magnetic sensor sensitivity.