基于直流偏磁实验的叠片铁心磁化特性分析  

Analysis of Magnetizing Characteristic of Laminated Core Based on the DC-Biasing Experiment

作　　者：赵小军[1] 李琳[1] 程志光[2] 鲁君伟 卢铁兵[1] 刘兰荣[2] 范亚娜[2] 

机构地区：[1]华北电力大学电气与电子工程学院,保定071003 [2]保定天威集团技术中心,保定071056 [3]格里菲斯大学格里菲斯工程学院

出　　处：《电工技术学报》2011年第1期7-13,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(50677016);河北省自然科学基金(E2006000772)资助项目

摘　　要：铁心中直流磁通的预测是研究变压器直流偏磁问题的关键。本文提出基于损耗函数的改进迭代法,在考虑磁滞效应的同时对基本磁化曲线进行修正,计算叠片铁心内的直流磁通。通过比较励磁电流的测量值与计算值,验证了该方法的有效性和正确性。获得了直流偏磁条件下叠片铁心的磁滞回线和基本磁化曲线,对有无直流偏磁条件下的基本磁化曲线进行了比较。提出了准确模拟直流偏磁磁滞回线的方法,并分析了直流偏磁下的铁心损耗。Predicting the DC flux in the laminated core plays an important role in solving the DC biased problems.A modified iterative method based on consuming function is proposed to predict the DC flux in the laminated core,considering the hysteresis effects and revising the normal magnetizing curve.Comparison between measured and calculated magnetizing currents verifies the effectiveness and validity of the method.The hysteresis loops under DC bias are obtained to analyze the dc-biasing normal magnetizing curves,which is compared with the one without DC bias.A method is presented to fit the DC-biasing hysteresis loops accurately and the core loss under DC bias is analyzed.

关 键 词：直流偏磁 直流磁通 叠片铁心 损耗函数 改进迭代法 磁滞回线 

分 类 号：TM153[电气工程—电工理论与新技术] TM429