摘要
大型发电机的振动噪声来源之一是由于铁心的磁致伸缩效应。为了研究铁心磁致伸缩现象对电机振动噪声的影响,本文对单片晶粒无取向电工钢片的磁致伸缩特性进行了深入研究。基于高精密磁致伸缩测量设备完成了无取向电工钢片在轧制方向和垂直轧制方向上磁致伸缩回环的测量,提取了能够描述电工钢片磁致伸缩特性的单值曲线。基于线性压磁方程,建立了电工钢片磁致伸缩数学模型,其中模型参数由测量数据拟合得到。最后,将磁致伸缩模型间接耦合到磁场的有限元计算中,编制了相应的计算机程序。通过将简单算例的仿真结果与实验测量结果的对比,验证了上述磁致伸缩模型及有限元分析方法的有效性。
One of the sources arising the vibration and noise of a large-scale generator is due to the magnetostriction effect of iron core. In order to develop the influences of magnetostrictive phenomenon of the core on vibration and noise of motor, in this paper, the magnetostrictive properties for a non-grain oriented electrical steel sheet are dealt with in detail. Based on highly precious magnetostrictive measurement equipment, the magnetostrictive loops of electrical sheet steel in the rolling direction and transverse direction are measured, and the single value curves taking into account magnetostrictive properties of electrical sheet steel is obtained. By using linear piezomagnetic equation, the mathematical model describing magnetostrictive property for the electrical steel sheet is established, in which the parameters are fitting from by measuring data. Finally, the magnetostriction model is indirectly coupled into the finite element calculation of magnetic field, and the corresponding computer program is compiled. By comparison of simulation results with the experimental ones for a simple model, it is verified that the effectiveness of both proposed magnetostriction model and finite element analysis.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第11期176-181,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51277122)
高等学校博士学科点专项科研基金(20122102130001)
辽宁省高等学校优秀人才支持计划(LJQ2013014)
辽宁省自然科学基金(2013020047)资助项目
关键词
磁致伸缩
数学模型
电工钢片
有限元分析
Magnetostriction, mathematical model, electrical steel sheet, finite element analysis
