极化磁系统中非线性永磁体工作点迁移机理与控制方法研究

项目名称： 极化磁系统中非线性永磁体工作点迁移机理与控制方法研究

项目编号： No.51507033

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 电工技术

项目作者： 由佳欣

作者单位： 哈尔滨工业大学

项目金额： 21万元

中文摘要： 极化电磁器件中非线性永磁体在调整磁场作用下由于邻近软磁材料、气隙等复杂因素的影响，工作点发生非典型性迁移，导致保持力等重要参数改变，使电器输出特性调整困难，产品可靠性受到严重影响。本项目首先基于微磁学原理，建立非线性永磁体微观模型；在此基础上研究开路及软磁环境下，调整磁场中永磁体工作点的变化规律；分析永磁材料与软磁材料局部磁矩间的相互作用，建立一个能够反映磁场非均匀分布、磁矩不同步翻转、局部工作点迁移、极化磁系统动态特性变化的数学模型，并开发永磁工作点分析实验系统进行验证；最终从微观角度解析极化磁系统中非线性永磁体工作点的迁移规律与变化机理，得到适用于极化磁系统中永磁体工作点的控制方法。本项目属于电气工程与材料学科交叉的应用基础研究，其研究成果对调整磁场与复杂软磁环境耦合作用下磁性材料微观结构特性及永磁体性能的研究具有理论意义，并对含非线性永磁体的极化电磁器件可靠性设计具有实用价值。

中文关键词： 极化磁系统；非线性永磁体；工作点；微磁学；分布参数

英文摘要： Due to the influence of complex factors such as the soft magnetic materials and air gap, the working point of nonlinear permanent magnet(NPM) in polarization electromagnetic devices, will change unpredictably under the effect of adjusting magnetic field which makes the adjust process of the device difficult. The reliability of the devices will be severely affect. In this project, on the basic principle of micromagnetism, NPM microscopic model will be built firstly to study under the open circuit and different soft magnetic environment. The changing rule of working point in adjusting magnetic field will be studied. Focus on the influence between the local magnetic moments in NPM and soft magnetic, the mathematic model will be built which can reflect the inhomogeneous magnetic field distribution, the out-sync reversal process of magnetic moment, the local and the whole working point migration, the change of the dynamic characteristics. The working point analysis experiment system will be developed. Finally, the resolution and mechanism for the working point migration in NPM can be summarized from the microscopic view polarized magnetic system. And the control method for permanent magnet working point in polarized magnetic system will be researched. This project belongs to the interdisciplinary basic application research of electrical engineering and material science. The results has the theoretical significance to the research of the microstructure and the performance of NPM under the complex soft magnetic materials environment coupling adjusting magnetic field. And has the practical value to the reliability design of polarized electromagnetic equipment which contains NPM.

英文关键词： polarized electromagnetic system;nonlinear permanent magnet;working point;micromagnetism;distribution parameters