| 引用本文: | 李长云,刘亚魁.直流偏磁时变压器铁芯的力学特性分析[J].电力自动化设备,2015,35(12): |
| LI Changyun,LIU Yakui.Analysis of mechanical characteristics of transformer iron core with DC bias[J].Electric Power Automation Equipment,2015,35(12): |
|
| 摘要: |
| 直流偏磁导致变压器局部过热，振动和噪声加剧，严重时可能损坏变压器。结合能量守恒原理，推导得到铁芯磁致伸缩与直流偏磁电流间的关系模型。基于所建立的数学模型，分析了直流偏磁引发的硅钢片的形变。以单相三柱变压器旁柱上最外层的硅钢片为对象进行了仿真研究，仿真结果证实了所推导模型的正确性，且表明磁致伸缩引发的铁芯形变是变压器振动加剧的关键因素。 |
| 关键词: 变压器 变压器铁芯 直流偏磁 力学特性 磁致伸缩 模型 仿真 |
| DOI： |
| 分类号: |
| 基金项目:山东省自然科学基金资助项目（ZR2012EEM002） |
|
| Analysis of mechanical characteristics of transformer iron core with DC bias |
|
LI Changyun, LIU Yakui
|
|
School of Electrical Engineering and Automation，Qilu University of Technology，Ji’nan 250353，China
|
| Abstract: |
| DC bias may cause the partial overheat of transformer，exacerbate its vibration and noise and even damage it. According to the energy conservation law，a model of relationship between magnetostriction and DC-bias current is deduced，based on which，the deformation of silicon steel sheet caused by DC bias is analyzed. Simulative study is carried out for the outmost silicon steel of a single-phase three-column transformer and the simulative results prove the correctness of the deduced model and show the iron-core deformation caused by magnetostriction is the key factor exacerbating the transformation vibration. |
| Key words: electric transformers transformer iron core DC bias mechanical characteristics magnetostriction models computer simulation |
