Eddy currents in end windings

THE PROBLEM of calculating eddy-current loss in the end portion of turbine-generator stator windings involves a study of the three-dimensional field of the end region of the machine. This field may be subdivided into components, and each component determined by two-dimensional methods. The components are combined to give the total flux density at any point. Once the flux density is known, eddy-current loss may be calculated by methods previously developed for bus bars and laminated cores.