考虑磁-力耦合效应的混合磁滞模型研究  

Study of Hybrid Hysteresis Model Considering Magnetic-Force Coupling Effect

作　　者：李永建[1,2] 李宗明 利雅婷 岳帅超 窦宇 Li Yongjian;Li Zongming;Li Yating;Yue Shuaichao;Dou Yu(State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology,Tianjin,300401,China;Hebei Key Laboratory of Equipment and Technology Demonstration of Flexible DC Transmission Hebei University of Technology,Tianjin,300401,China)

机构地区：[1]省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学),天津300401 [2]河北省柔性直流输电装备与技术实证重点实验室(河北工业大学),天津300401

出　　处：《电工技术学报》2024年第22期6941-6951,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(52130710,52277008);河北省教育厅在读研究生创新能力培养项目(CXZZSS2024014)资助。

摘　　要：应力作用会影响磁性材料的磁性能,准确快速地模拟磁性材料在不同应力下的磁化特性对设计承受机械应力的装备铁心具有重要意义。该文研究拉应力作用下取向电工钢磁畴结构沿轧制方向的变化规律,将拉应力与畴壁平移运动之间的关系量化处理,由此采用基于畴壁平移运动的J-A模型对材料的磁化特性进行描述,通过提出适用于低磁通密度范围的新型无磁滞磁化公式替代传统J-A理论中的郎之万公式以考虑拉应力对取向电工钢磁化特性的影响;通过将磁畴简化为独立个体,将磁致伸缩效应在高磁通密度范围对取向电工钢磁化特性的影响转换为磁畴之间的摩擦作用,提出适用于高磁通密度范围的改进磁滞模型;应用BP神经网络寻找出最佳比例参数,将两种不同适用范围的磁滞模型构建为完整的磁-力耦合模型。通过对比实验结果与模型计算结果,验证了所提混合磁滞模型的准确性。The magnetization characteristics cause the most complex part of the loss composition in electrical equipment during the magnetization process of magnetic materials.Grain-oriented electrical steel,the widely used core material for power transformers,has its magnetic properties affected by stress,thereby impacting the performance of power transformers.Therefore,accurately and quickly simulating the hysteresis characteristics of magnetic materials under different stresses is significant for designing equipment cores that withstand mechanical stress.Firstly,a magnetic property measurement device is used to measure the magnetization characteristics of grain-oriented electrical steel sheets under different tensile stresses along the rolling direction.The relationship between the magnetization characteristics of grain-oriented electrical steel and different movement modes of magnetic domains is established by comparing with the changes in the domain structure of grain-oriented electrical steel under different stress levels.It is assumed that the magnetization characteristics of magnetic materials are linear when domain wall motion is dominant and non-linear when magnetization rotation is dominant.Tensile stress mainly affects the domain wall motion of grain-oriented electrical steel in the low magnetic flux density range.Additionally,assume that the change efficiency of the magnetic domain in the low magnetic flux density range is constant under constant stress.The magnetic domain change efficiency ntp is expressed as 1/Ht(Ht is the magnetic field strength at the end of the domain wall translational motion),and the relationship between ntp and tensile stress is quantified into a specific mathematical expression.A new anhysteretic magnetization formula based on the relationship between ntp and stress is proposed to replace the traditional J-A model’s formula based on Langevin theory.Thus,a mathematical model is proposed as Model 1 for the low magnetic flux density range to describe the domain wall motion of grain-orie

关 键 词：J-A模型 BP神经网络 取向电工钢 拉应力 磁畴运动 

分 类 号：TM275[一般工业技术—材料科学与工程]