电工技术学报  2023, Vol. 38 Issue (12): 3101-3111    DOI: 10.19595/j.cnki.1000-6753.tces.220421
电工理论 |
基于Energetic模型的机械应力作用下电工钢片磁滞特性模拟
陈昊1, 李琳1, 刘洋2
1.新能源电力系统国家重点实验室(华北电力大学) 北京 102206;
2.先进输电技术国家重点实验室(智能电网研究院有限公司) 北京 102209
Simulation of Magnetic Hysteresis Characteristics of Electrical Steel Sheet under Mechanical Stress Based on Energetic Model
Chen Hao1, Li Lin1, Liu Yang2
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China;
2. State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co. Ltd Beijing 102209 China
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摘要 准确模拟电工钢片在机械应力作用下的磁滞特性是电工装备铁心优化设计的关键技术。该文首先基于原始Energetic磁滞模型,在电工钢片的总能量密度中引入由机械应力引起的能量密度附加项;其次,根据能量平衡原理,采用场分离技术实现能量密度分量向磁场分量的转换;然后,考虑Energetic磁滞模型中各参数对机械应力的依赖性,利用场叠加原理建立一种机械应力作用下的电工钢片磁滞模型;最后,以晶粒取向硅钢片为例,基于取向硅钢片在不同压缩和拉伸应力下的磁滞回线实验数据,采用粒子群优化算法对所提模型参数进行辨识,从而揭示了模型参数对机械应力的依赖关系,并在此基础上分析了机械应力对取向硅钢片矫顽力、磁滞损耗密度以及剩磁的影响规律。对比仿真和实验结果,验证了所提模拟方法的准确性。
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陈昊
李琳
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关键词 电工钢片机械应力磁滞特性Energetic模型    
Abstract:The electric steel sheets are widely used in the iron cores of electrical equipment such as transformers, motors, and reactors. However, in the actual processing and operation, the iron cores will be subjected to varying degrees of tensile or compressive stress, which will cause significant changes in the magnetic hysteresis characteristics of electrical steel sheets and affect the operating performance of the iron cores. Therefore, it is necessary to accurately simulate the magnetic hysteresis characteristics of electrical steel sheet under mechanical stress for the iron cores optimization design.
At present, the simulation methods of magnetic hysteresis characteristics under mechanical stress are mainly divided into three categories: the method based on Preisach model, the method based on multiscale model and the method based on Jiles-Atherton (J-A) model. Among them, the method based on Preisach model is a pure mathematical method, and cannot explain the mechanism of mechanical stress on magnetization characteristics of magnetic materials. The method based on multiscale model has a clear physical basis, but it can only simulate the anhysteretic curve. The method based on J-A model need to solve a nonlinear differential equation, and the calculation process is relatively complex. Therefore, a novel method is needed to accurately simulate the magnetic hysteresis characteristics of electrical steel sheets under mechanical stress.
Compared with the above models, Energetic hysteresis model has the advantages of simple expression and high calculation efficiency, and it can also consider the influence of mechanical stress on magnetic hysteresis characteristics. Therefore, this paper based on the original Energetic hysteresis model, the energy density caused by mechanical stress as an additional term is introduced into the total energy density of electrical steel sheets. Then according to the principle of energy balance, the field separation technology is used to realize the conversion of the energy density components to magnetic field components. Finally, considering the dependence of each parameter in Energetic model on mechanical stress, the principle of field superposition is used to establish a magnetic hysteresis model of electrical steel sheets under mechanical stress.
Taking the grain-oriented silicon steel sheet as an example, the results show that under tensile and small compressive stress (less than-7.09 MPa), the overall accuracy of simulated results is high, and the root mean square error is less than 5 A/m, which proves the accuracy of the proposed method. When the compressive stress is large (-8.86 MPa and-10.63 MPa), the root mean square error becomes larger and is close to 10 A/m, but the overall fitting is acceptable. The reason why the error increases with the increase of compressive stress is that the magnetic domain structure changes significantly when the compressive stress increases. The decrease of experimental measurement accuracy is also one of the reasons for the large simulation error. Although the tensile stress and compressive stress are measured separately and the measurement is carried out incrementally from small stress to large stress in order to reduce the experimental errors, the measurement errors would gradually accumulate during the process of increasing compressive stress. The results also show that each parameter in the model is significantly dependent on the mechanical stress, and different parameters has different dependence on the mechanical stress, and the same parameter has different dependence on compression and tensile stress. Therefore, it is necessary to consider the stress dependence of model parameters to simulate the hysteresis characteristics of electrical steel sheet under mechanical stress. In order to further clarify the influence law of mechanical stress on magnetic hysteresis characteristics, the coercivity, loss density and remanence under the action of mechanical stress are analyzed by simulation and experiment. And the average relative errors are 3.93%, 3.12% and 7.81%, respectively.
Key wordsElectrical steel sheet    mechanical stress    magnetic hysteresis characteristics    Energetic model   
收稿日期: 2022-03-23     
PACS: TM271  
基金资助:国家重点研发计划(2021YFB2401703)和国家自然科学基金(52177005)资助项目
通讯作者: 李琳 男,1962年生,教授,博士生导师,研究方向为电磁场理论及应用与先进输变电技术。E-mail:lilin@ncepu.edu.cn   
作者简介: 陈昊 男,1994年生,博士研究生,研究方向为软磁材料磁弹性耦合模拟与电工装备优化设计。E-mail:chenhao_xmzdls@126.com
引用本文:   
陈昊, 李琳, 刘洋. 基于Energetic模型的机械应力作用下电工钢片磁滞特性模拟[J]. 电工技术学报, 2023, 38(12): 3101-3111. Chen Hao, Li Lin, Liu Yang. Simulation of Magnetic Hysteresis Characteristics of Electrical Steel Sheet under Mechanical Stress Based on Energetic Model. Transactions of China Electrotechnical Society, 2023, 38(12): 3101-3111.
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