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Vector Magnetic Properties Oriented to Magnetic Field Analysis

面向磁场分析的矢量磁特性

基本信息

批准号：
13555081
负责人：
FUJIWARA Koji
金额：
$ 4.42万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555081/
关键词：
Magnetic anisotropy 2-D (vector) magnetic properties Electrical steel sheet Single sheet tester Finite element method Nonlinear magnetic field analysis Three-phase transformer core Interior permanent magnet motor 二次元(ベクトル)磁化特性厚さ方向磁気特性 /

项目摘要

Numerical simulation of magnetic fields requires a proper material modeling as well as a robust method of discretization of governing equations. Only a robust discretization is not enough to get higher accuracy and to improve design strategy. Recently, the material modeling receives large engineering attention. In this project, magnetic anisotropy (vector magnetic property) of electrical steel sheet, which is used as a material for principal magnetic path in electrical machine, is discussed. A standard method of measurement by means of a double-excitation type of single sheet tester is investigated and a modeling method for anisotropy is developed based on the finite element formulation. Then it is applied to the analysis of typical electrical machines for verification. The contents discussed are as follows.(1)Construction of a measuring system, and examination of measurement accuracy and its improvement,(2)Measurements of vector magnetic properties of various electrical steel sheets,( … More 3)Development of an approximation method of vector magnetic property, its verification by using numerical simulation method, and its stabilization and speedup,(4)Application to three-phase transformer core and interior permanent magnet motor.Regarding to a method of measurement, magnetization properties up to 2 T can be measured for various kinds of electrical steel sheets with different degree of anisotropy Reproducibility of the measurement is within about ±3%, which is similar to that for ordinary 1-D measurements. Therefore, the proposed method of measurement seems to be fairly useful.Regarding to numerical simulation, a method of modeling anisotropy using normal magnetization curves are established. Its stability for nonlinear iterative analysis is nearly equivalent to ordinary calculations without taking account of anisotropy because of the introduction of a line search technique. Robustness of the method is verified by applying it to the analysis of typical electrical machines using recently developed cube-textured electrical sheets. Less

磁场的数值模拟需要一个适当的材料模型，以及一个强大的方法离散化的控制方程。仅仅有一个鲁棒的离散化是不够的，以获得更高的精度和改进的设计策略。近年来，材料建模受到工程界的广泛关注。本项目讨论了用作电机主磁路材料的电工钢片的磁各向异性（矢量磁性能）。研究了双激励型单片试验机的标准测量方法，并基于有限元公式建立了各向异性的建模方法。然后将其应用于典型电机的分析中进行验证。讨论的内容如下。（1）测量系统的建立、测量精度的检验及其改进;（2）各种电工钢片矢量磁性能的测量;（ ...更多信息 3)矢量磁特性近似方法的发展、数值模拟方法的验证及其稳定性和加速性。（4）在三相Transformer铁芯和内置式永磁电机中的应用。对不同各向异性程度的各种电工钢片，可测量2 T以下的磁化强度。± 3%，这与普通一维测量相似。在数值模拟方面，建立了一种利用法向磁化曲线模拟各向异性的方法。由于引入了线搜索技术，其非线性迭代分析的稳定性几乎等同于不考虑各向异性的普通计算。该方法的鲁棒性进行了验证，将其应用到分析的典型电机使用最近开发的立方织构电气片材。少