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The Multi-physics Research on Iron-Core Vibration Noise of Power Reactor

LIU Ji;HE Ya-qian;LI Kai;School of Electrical and Electronic Engineering,Harbin University of Science and Technology;State Grid Shandong Electric Power Supply Co.Ltd.;  
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.
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