Basic Studies on Methods of In-Plane Eddy Current Analysis for Stator Core-Ends of Turbine Generators

Abstract

In this paper, we investigate the methods of eddy current analysis for stator core-ends of turbine generators from both results of experiment and finite element analysis. First, the 3-D finite element analysis considering the lamination of the core is applied to the simple model that simulates the end part of the turbine generator. The calculated losses and flux distributions caused by the perpendicular flux are compared with the measurement to verify the validity of the calculation method. The measured and calculated results agree well. Next, the calculation method is applied to the 250MVA class turbine generator with the considerations of the laminated stator core. The field and loss distributions at stator core-ends of the turbine generators are clarified.