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为研究CRH380A高速动车壳式牵引变压器磁场、涡流及损耗的大小,提出了采用ANSYS有限元分析的方法。结合多绕组变压器的磁动势方程,建立了涡流场分析计算的数学模型,详细介绍了有限元分析的流程。同时建立了该壳式牵引变压器的三维有限元模型,分析了变压器铁心主磁通、铁心夹板和油箱壁的漏磁及涡流,计算了变压器主要部件的损耗。仿真结果表明:变压器额定运行条件下铁心主磁通为1.5 T,钢夹板上的漏磁和涡流具有上下对称的规律,油箱漏磁和涡流最大的地方位于与绕组端部对应的区域。该研究工作弥补了传统工程设计方法中无法计算漏磁与涡流损耗的缺陷,同时也为变压器的优化设计提供了参考依据。
In order to study the magnetic field, eddy current and loss of the CRH380A high-speed CRH traction transformer, a method using ANSYS finite element analysis is proposed. Combined with the magnetomotive force equation of multi-winding transformer, the mathematical model of eddy current field analysis and calculation is established, and the flow of finite element analysis is introduced in detail. At the same time, the three-dimensional finite element model of the shell-type traction transformer was established. The magnetic flux leakage and eddy current of the main magnetic flux of the transformer core, the core plywood and the tank wall were analyzed, and the loss of the main components of the transformer was calculated. The simulation results show that the main magnetic flux of the iron core is 1.5 T under the rated operating conditions of the transformer, and the leakage flux and the vortex flow on the steel clamping plate have a symmetrical rule. The maximum magnetic flux leakage and eddy current are located in the area corresponding to the end of the winding. The research work makes up for the shortcomings of the traditional engineering design method can not calculate the leakage and eddy current losses, but also provides a reference for the optimal design of the transformer.