用磁通计螺线管法所测铁磁圆柱样品磁化强度对磁场的关系曲线的退磁修正  

Demagnetizing correction of magnetization curves of ferromagnetic cylinders measured with solenoid-fluxmeter method

作　　者：陈笃行 朱永红 向礼雄 丁佳泉 Pardo Enric CHEN Du-xing1;ZHU Yong-hong2;XIANG Li-xiong2;DING Jia-quan2;Pardo Enric3(1. Departament de Fisica, Universitat Autonoma de Barcelona, Barcelona 08193, Spain,2. Hunan Forever Elegance Technology, Loudi 417000, H unan, Chinas3. Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska 84104, Bratislava, Slovaki)

机构地区：[1]巴赛罗那自治大学物理系,西班牙巴赛罗那贝拉特拉08193 [2]湖南省永逸科技有限公司,湖南娄底417000 [3]斯洛伐克科学院电工所,斯洛伐克布拉迪斯拉发84104

出　　处：《金属功能材料》2018年第4期27-34,共8页Metallic Functional Materials

摘　　要：介绍一种开发中的技术,可把铁磁圆柱样品用磁通计螺线管法测量的磁化强度对外加磁场的关系曲线施行退磁修正,成为材料的真实磁化强度对磁场的关系曲线。与通常采用人为指定的一两个退磁因子数值的方法不同,这种技术采用的是准确计算出的,随被修正曲线每点微分磁化率而变的磁通计法退磁因子。因而,对每个样品的每条曲线,修正结果是唯一的。因为传统的退磁因子只能对顺磁样品定义,该项技术把它用于铁磁样品时必然会带来误差。实验证明,这是一种随圆柱体长径比加大而减小的系统误差,因而只要长径比足够大,误差就很小。对半软半硬磁开路样品而言,该项技术不但导致与目前推荐的磁导计法不同的另一种测量方法的诞生,而且有望为前者提供标准样品,解决一直存在的结果准确性难以验证的问题。A technique is developed for demagnetizing correction of magnetization curve of a ferromagnetic cylinder directly measured with solenoid-fluxmeter method to the true magnetization curve of the material.Compared with ordinary correction using artificially chosen values of demagnetizing factor,accurately calculated fluxmetric demagnetizing factor with values depending on the differential susceptibility of the measured curve is used,so that the corrected result is unique.The application of demagnetizing factor defined for paramagnets to ferromagnets must involve error,but the error decreases with increasing the length-to-diameter ratio of the cylinder,so that it can be very small when the ratio is large enough.For measuring semi-soft or semi-hard magnetic materials,the technique not only leads to the proposition of a method other than the commonly recommended permeameter method,but also may provide standard samples to be used for justification of the latter method.

关 键 词：磁性测量 铁磁圆柱样品 退磁修正 螺线管法 磁导计法 

分 类 号：TM153[电气工程—电工理论与新技术]