磁性材料二维旋转磁化特性测量平台研制

Development of two dimensional rotational magnetization measurement platform

电机轭部以及多相变压器接合部存在旋转磁化现象,为了对其进行研究,本文设计了单轭结构的旋转磁化平台,并在MAXWELL中对测量平台的三维瞬态磁场进行了模拟。结果表明样片中有效区的磁密分散性小于0.01T,角度分散性小于1°,此外,文中对二维旋转磁场的产生以及磁场测量方法进行了探讨,并且在此基础上研制了二维旋转磁化特性测量平台,并编制了基于MATLAB语言的在线测量界面。通过对单片材料50WW400进行实验,观察到无取向材料仍具有显著的各向异性以及二维磁化不同于一维磁化的导磁与铁耗特性。此平台的研制为后续深入研究材料的二维磁化性能打下了基础。

Rotational magnetization phenomenon exists in motor stator yoke and joint area of transformers. In order to study this phenomenon, a single-yoke-structured measurement platform was designed for rotational magnetization and a 3-D transient magnetic flux pattern of the platform model is simulated in Maxwell software. The result shows that non-uniformity of magnetic flux density and its angle in interested area of specimen is less than 0.01 Tesla and 1 degree, respectively. In addition, realization of rotational magnetic flux pattern and its detection method is discussed in the paper. On this basis, a 2-D rotational magnetization measurement platform and its MATLAB program for silicon steel is developed. By experiment on non-orient silicon sheet 50WW400, it shows that notable anisotropy still exists, and great difference in permeability and iron loss between 2-D and 1-D magnetization. The establishment of this platform lays a basis for further study of 2-D magnetic property of materials.