【作者】 王乐；

【导师】 赵江； 姚福来；

【作者基本信息】 河北科技大学 ， 电气工程（专业学位）， 2020， 硕士

【摘要】 铁磁材料以其磁滞特性、低损耗、低造价、高可靠性等优点使得其在工程领域的应用范围很广。以铁磁材料为原料制造的各种电机,变压器等电磁设备被广泛应用于电力工业当中,对于国民经济起到了至关重要的推动作用。对铁磁材料的磁滞、损耗等磁特性的准确测量和模拟是其在新型电磁设备设计推广应用的关键。针对于铁磁材料磁特性测量方法。依据激励条件,在维度上分为三类:一维、二维、三维磁特性测量方法。一维磁特性测量方法,是基于单方向上的激励条件,但实际中大多数电机等电磁设备中磁场性质都是旋转磁特性,一维磁特性测量方法未能体现铁磁材料在旋转磁场下的二维磁特性,所以二维和三维磁特性测量方法更能模拟真实的电磁设备中受到旋转磁场影响下铁磁材料的磁特性。基于以上,本文设计了铁磁材料二维旋转磁特性测量系统来探究铁磁材料在旋转磁场下表现出的磁特性。首先,对铁磁材料的分类进行了概述,后对于不同的测量方法进行了对比。对于本文采用的二维磁特性测量方法,对于其旋转磁特性的原理进行了阐述和分析,并且对二维磁特性测量装置的研究进展进行了介绍。其次,通过有限元软件仿真了几种基本的二维磁特性测量装置的激磁结构,并对比了样片表面的磁通密度,磁化均匀度。通过对比之后,选择了基于方形样片的二维磁特性测量装置,并基于本文实验设计需要对于测量装置进行了磁极以及磁轭的优化设计。再次,基于仿真优化的结果,设计了铁磁材料二维旋转磁特性测量装置的实验流程。对于功率放大单元,测量单元、小信号放大单元、主磁路单元等分别根据实验需要进行了硬件选型和设计,使之达到实验要求。最后,本文将虚拟仪器技术应用于测量系统之中。将实验所需的电压采集程序和模拟电压输出程序分别进行了设计,使得系统具有可视化界面。对于实验结果进行了分析,证明了本文实验的可行性。更多还原

【Abstract】 Ferromagnetic materials have a wide range of applications in engineering fields due to their hysteresis properties,low loss,low cost,and high reliability.Various motors,transformers and other electromagnetic equipment manufactured using ferromagnetic materials as raw materials are widely used in the power industry,which plays a vital role in promoting the national economy.The accurate measurement and simulation of magnetic properties such as hysteresis and loss of ferromagnetic materials is the key to application in the design and promotion of new electromagnetic equipment.For the measurement method of ferromagnetic material magnetic properties.According to the excitation conditions,it is divided into three categories in terms of dimensions: one-dimensional,two-dimensional,and three-dimensional magnetic property measurement methods.The one-dimensional magnetic property measurement method is based on the excitation conditions in single direction,but the magnetic field properties of most electromagnetic equipment such as motors are rotating magnetic properties.The one-dimensional magnetic property measurement method cannot reflect the two-dimensional magnetic properties of ferromagnetic materials under the rotating magnetic field,so two-dimensional and three-dimensional magnetic property measurement methods can better simulate the magnetic properties of ferromagnetic materials under the influence of rotating magnetic fields in real electromagnetic equipment.Based on the above,this paper designs a two-dimensional rotating magnetic property measurement system for ferromagnetic materials to explore the magnetic properties of ferromagnetic materials under a rotating magnetic field.First,the classification of ferromagnetic materials was summarized,and then different measurement methods were compared.For the two-dimensional magnetic property measurement method used in this paper,the principle of its rotating magnetic property is explained and analyzed,and the research progress of the two-dimensional magnetic property measurement tester is introduced.Secondly,the finite element software was used to simulate the excitation structure of several basic two-dimensional magnetic property measuring testers,and the magnetic flux density and magnetization uniformity on the surface of the sample were compared.After comparison,the two-dimensional magnetic property measurement tester based on square samples was selected,and the magnetic pole and yoke were optimized for themeasurement tester based on the experimental design in this paper.Thirdly,based on the results of simulation optimization,the experimental process of the two-dimensional rotating magnetic property measurement tester for ferromagnetic materials was designed.For the power amplifier unit,the measurement unit,the small signal amplifier unit,the main magnetic circuit unit,etc.were selected and designed according to the needs of the experiment to make it meet the experimental requirements.Finally,this paper applies the virtual instrument technology to the measurement system.The voltage acquisition program and analog voltage output program required for the experiment were designed separately,so that the system has a visual interface.The analysis of the experimental results proves the feasibility of the experiment in this paper.更多还原