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Forces on the End Winding of Turbine-Generators I - Determination of Flux Densities

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1 Author(s)
J. A. Tegopoulos ; Westinghouse Electric Corporation

Flux densities are determined at certain points of the end, coils (field points) of turbine-generators as a result of stator and rotor currents. Coils of the stator and rotor end windings are assumed to close through the air gap and all iron boundaries are present and assumed to have infinite permeability. Stator currents considered as sources are assumed to flow as sinusoidal current sheets on cylindrical rings and washers, replacing the conical surfaces of the two layers. This is accomplished by dividing the end winding in zones by means of equally spaced z = constant planes. Only one cylindrical ring is assigned to the rotor. The coils are represented by their center lines. The field points are determined by the intersections of these center lines with the central planes of each zone.

Published in:

IEEE Transactions on Power Apparatus and Systems  (Volume:PAS-85 ,  Issue: 2 )