定子线棒受力三维有限元分析

3D FEM Analysis about Stator Winding Force

文章构建了用三维瞬态有限元方法计算大型发电机定子线棒电磁力的数学模型,并以某大型发电机的端部实际结构搭建数学分析模型,搭建了满足实际工程结构的发电机定子线棒端部三维瞬态有限元模型。随后进行三维有限元单元剖分和边界条件处理,并完成了对空载运行、额定负载运行、进相(深度0.9)运行等不同工况下发电机定子线棒端部受到电磁力的计算和分析。计算结果不仅验证三维瞬态有限元法分析发电机电磁场的正确性,同时也为发电机定子线棒的设计和振动研究提供了理论依据,并根据分析结果提出了一些防止定子线棒振动的优化措施。

The mathematical model to calculate the electromagnetic forces acting on winding end of generator by 3D transient magnetic field FEM is established.Taking a generator as an example,3D full model of the end region of generator is built.After finite element subdivision and boundary condition processing,the paper completes the calculation of the electromagnetic force on winding end at no load operation,rated load operation,leading phase operation(depth 0.9).The calculated results of electromagnetic force acting on stator winding end are obtained.The results can not only verify the correctness of the 3D transient magnetic field FEM method for generator magnetic calculation,but also provide the theoretical basis for the generator design and vibration research of stator winding and propose some measures for preventing winding vibration.