非正弦周期激励下硅钢的损耗和磁化特性研究

With the expanding of DC power transmission and ultra high voltage engineer, more and more electrical equipments operate under non-sinusoidal periodic excitation condition. The total loss ratio and magnetization characteristic of the magnetic material are the key factors to determine the electrical characteristic of the electrical equipment. In the project, the main work is to study the total loss ratio and magnetization characteristic of the silicon steel under Non-Sinusoidal periodic excitation based on experiments and magnetization mechanism. The project includes: (1) The total loss ratio and magnetization characteristics experimental platform for silicon steel will be established and the magnetization characteristic and total loss ratio of magnetic material under Non-Sinusoidal periodic excitation are studied by experiments. The standardization and normalization for the experimental methods of silicon steel are searched. (2) The impacts of the order, the amplitude and phase of the harmonic on the loss of silicon steel are studied. (3) The research of improved material loss model will be carried out or proposed for the materials excited by non-sinusoidal signal based on the experimental data and theory analysis. (4) The hysteresis model will be studied to improve the calculation accuracy by means of high efficient numerical periodical method with the modified hysteresis model. The lamination-level finite model and calculation are implemented to obtain more accurate results for electromagnetic fields and loss involving silicon steel material.

随直流输电和特高压工程的发展，越来越多的电气设备工作在非正弦周期激励的复杂工况下，设备的铁磁材料在非正弦激励下的损耗和磁化特性是决定设备电气特性的重要因素，本课题基于实验和磁化机理对硅钢在非正弦周期激励下的损耗及磁化特性进行研究，具体内容为（1）搭建硅钢的损耗和磁化特性测量平台，对硅钢在非正弦周期激励下的损耗和磁化特性进行实验研究，探索硅钢损耗测量方法的规范化与标准化。(2) 研究谐波的阶次、幅值和相位等因素对硅钢损耗的影响机理。（3）改进或提出非正弦周期激励下硅钢损耗的数学模型。(4) 研究铁磁材料的磁滞模型以及考虑磁滞特性的高效周期算法，实现从叠片级别对硅钢电磁场分布及损耗的精确计算。

随直流输电和特高压工程的发展，越来越多的电气设备工作在非正弦周期激励的复杂工况下，设备的铁磁材料在非正弦激励下的损耗和磁化特性是决定设备电气特性的重要因素，本课题基于实验和磁化机理对硅钢在非正弦周期激励下的损耗及磁化特性进行研究，具体内容为（1）搭建硅钢的损耗和磁化特性测量平台，对硅钢在非正弦周期激励下的损耗和磁化特性进行实验研究，探索硅钢损耗测量方法的规范化与标准化。(2) 研究谐波的阶次、幅值和相位等因素对硅钢损耗的影响机理。（3）改进或提出非正弦周期激励下硅钢损耗的数学模型。(4) 研究铁磁材料的磁滞模型以及考虑磁滞特性的高效周期算法，实现从叠片级别对硅钢电磁场分布及损耗的精确计算。