【作者】 薛刚；

【导师】 李永建；

【作者基本信息】 河北工业大学 ， 电气工程， 2016， 硕士

【摘要】 随着现在世界的发展,磁性材料的重要性也日益凸显。如今磁性材料应用于电气设备的各个领域,国内外均开始重视对磁性材料磁特性的研究。但目前这一领域尚处在对磁性材料的一维和二维磁特性的研究,如今一维磁特性测试装置发展较为成熟,且已经制定了国家标准,而二维测试装置只是处于研究的初级阶段。实际上,电机与变压器的铁心在工作状态下,会产生空间三维的磁场,离不开其三维磁特性。因此,对三维磁特性测试装置的设计与优化研究具有重要意义。本文是基于国家自然科学基金重点项目《电工磁性材料三维磁特性检测技术和张量磁滞模型的研究》进行的,主要针对硅钢叠片等材料磁特性的各向异性,设计了新型的三维磁特性测试装置,对装置的激磁结构和传感结构进行了优化设计,并进行了实验测试。主要研究内容如下:(1)对三维磁特性装置的激磁主磁路进行了进一步的设计与优化,分别对其激磁主磁路的极头形状、倾斜角度以及极头的硅钢片叠置方式进行了设计,并对待测样品的匀场极靴和最优气隙大小进行优化计算,设计了可以产生均匀磁场的最优磁路,为磁性材料三维磁特性的测试奠定了基础。(2)设计适用于多频段磁特性测试的新型柔性激磁绕组,重点分析激磁线圈制作的最优状态并进行设计,解决了在进行高频磁特性测试实验时,最大磁感应强度受限的问题,使线圈可以实现在2-1000Hz范围内任意激磁条件下的稳定激磁。(3)设计改进出了新型复合式B-H传感线圈和传感箱结构,重点解决了测试误差较大的难题,通过设计线圈标定实验,采用标准螺线管对复合传感线圈的线圈系数进行了校准,为三维磁特性测试提供了可靠保障。(4)设计了全自动的测试与采集控制系统,可以有效保证传感信号不失真,并通过数字滤波和信号调零的方法,有效地削弱线圈中的干扰,提高了检测精度。(5)设计实现对测试装置x、y、z三个方向激磁信号的给定,对非取向型35ww270硅钢片分别进行了一维、二维和三维的磁特性测试实验,得到了其完备的磁特性,可以为新型高性能电机的设计优化提供实验参考。更多还原

【Abstract】 With the development of industrial science and technology in the world,the application of magnetic materials is more and more extensive.Magnetic materials play an important role in all fields of electrical machines and appliances,so the research of magnetic materials is also more and more deeply.At present,the research on magnetic properties of one-dimensional and two-dimensional magnetic materials is relatively perfect,there are a lot of more mature theoretical methods and experimental device.But in the practical application of magnetic materials,the three dimensional magnetic properties cannot be separated.Therefore,it is very necessary to study the three-dimensional(3D)magnetic properties of the magnetic materials.The thesis is based on “Research on three-dimensional magnetic properties inspection technology of electromagnetic materials and hysteresis model of tensor” supported by NSFC.Mainly aims at the difficult problem in the field of simulation of the magnetic properties of the materials,a new method to achieve accurate three-dimensional magnetic properties of the material is put forward in this paper,a new type of three-dimensional design of improved magnetic characteristics test experimental system,its excitation and sensing systems are optimized,and the alternating and rotating magnetic properties of silicon sheet material are tested over wide frequency range.The main contents are as follows:(1)The main magnetic circuit of the excitation device of 3D magnetic properties is designed and optimized further,the excitation of the main magnetic circuit pole shape,angle and pole of sheet stacking mode is designed,and the sample to be measured is the shimming protective layer and the optimal air gap size optimization calculation the optimal magnetic field,uniform magnetic field,which lays the foundation for 3D measurement of magnetic properties of magnetic materials.(2)A flexible excitation method was exploited and an excitation system over wide frequency range is designed.This enables the SMC specimen can be technically magnetized under various excitation conditions and frequency range achieves from 2 Hz to1000 Hz.(3)A novel 3D sensing box is designed and analyzed to improve the measurement accuracy of the surface inducted H and B.Calibration technique for the novel sensing coil is proposed also.Tensor coefficient of 3D sensing box is obtained by means of comprehensive calibration experiment.In addition,the compensation approach is adopted to improve accuracy further.According to these calibration and compensation methods,Band H vectors computing formulas were derived.(4)The sensor signal detection of 3D magnetic properties is optimized,automatic test data acquisition and control system are designed,which can effectively guarantee the sensing signal without distortion,and through digital filtering and signal nulling method,effectively reduce interference in the coil,improve the accuracy of detection.(5)Based on virtual instrument to achieve 3D magnetic characteristics of the test device x,y,z three directions complex excitation pattern signal given,the waveform,frequency,amplitude,phase,sampling rate can be adjusted.The magnetic properties of the non-oriented silicon steel sheet are tested over wide frequency range,This study can provide theoretical and experimental guidance to optimize the device performance and lower the product cost.Meanwhile,it paves the way to design high frequency devices.更多还原