直流偏磁条件下叠片铁心的磁性能模拟  

Magnetic Property Modeling of Laminated Core Under DC-Biased Condition

作　　者：赵志刚[1] 刘福贵[1] 程志光[2] 刘兰荣[2] 张俊杰[2] 范亚娜[2] 颜威利[1] 

机构地区：[1]河北工业大学电磁场与电器可靠性省部共建重点实验室,天津300130 [2]保定天威集团技术中心,保定071056

出　　处：《电工技术学报》2010年第9期14-19,共6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(E2006001036)资助项目

摘　　要：基于完全按照电力变压器的标准设计和制作的叠片铁心模型,模拟变压器叠片铁心直流偏磁工作条件下的综合磁性能。利用实验获得的绕组感应电压和励磁电流等性能数据,计算得到了叠片铁心的直流磁化曲线。基于电压电流实测数据和直流磁化曲线的计算结果,提出了直流偏磁条件下变压器铁心中直流磁通的仿真求解方法,进而确定了偏磁工作条件下铁心模型的磁滞回线族。利用Matlab软件对变压器铁心在直流偏磁工作条件下的损耗进行了实验研究和分析,获得了不同偏置磁场作用时变压器叠片铁心的损耗曲线,可用于直流偏磁电磁场的分析以及产品的电磁设计。An efficient method for modeling the global magnetic properties of the transformer under dc-biased condition based on a laminated core model （LCM） of product level is proposed. However,the dc bias magnetic flux can not be measured directly in the experiment,and then a simulated method is proposed to calculate the dc magnetic flux in the iron core. The calculation program is developed based on the commercial software Matlab,thus the hysteresis loops of the iron core under biasing magnetization are obtained. Experimental study on the iron loss of the transformer is carried out,the different iron loss curves under various dc-biased magnetic field strength are determined. They are necessary for the analysis of dc bias magnetic field and electromagnetic design of products.

关 键 词：直流偏磁 电力变压器 叠片铁心模型 直流磁通 磁滞回线 损耗曲线 

分 类 号：TM201.45[一般工业技术—材料科学与工程]