电抗器铁芯振动噪声多物理场研究

摘要

在磁致伸缩和麦克斯韦方程相关理论研究的基础上,采用有限元方法利用有限元软件COMSOL,在瞬态电磁场耦合、结构力场耦合以及声场耦合基础上建立了一台三相串联铁芯电抗器模型,针对三相串联铁芯电抗器在工频工作状态下的磁场分布、铁芯磁致伸缩位移、铁饼间的麦克斯韦力位移和声压级进行分析研究.根据仿真中电抗器的瞬态磁场分布,得到电抗器内部磁通密度分布、振动位移分布,进而得到声场分布.实验表明,多物理场仿真得到的结果与实测数据基本一致,证实运用多物理场耦合对噪声进行预估是一种有效的方法.%On the basis of theoretical research releted to the magnetostriction and maxwell's equations,the finite element coupling in the transient electromagnetic field coupling,structure and sound field coupling has been developed in this paper by using the finite element software COMSOL,which establish a series three-phase core reactor model,to analyzing the power frequency magnetic field distribution,core magnetostrictive displacement,maxwell force displacement and sound pressure level of the three-phase series core reactor under the power frequency working state.According to transient magnetic field distribution in the simulation of the reactor,the magnetic flux density distribution inside the reactor and the vibration displacement distribution are calculated,the acoustic field distribution is measured alao.It is shown that physical field simulation results and measured data are basically in consisent by experiment,it is proved multi-physics coupling is an effective method for forecast of noise.