Title :
Damper Winding Influence on Unbalanced Magnetic Pull in Salient Pole Generators With Rotor Eccentricity
Author :
Wallin, Mattias ; Bladh, Johan ; Lundin, Urban
Author_Institution :
Dept. of Eng. Sci., Uppsala Univ., Uppsala, Sweden
Abstract :
The influence of three different damper winding configurations on unbalanced magnetic pull (UMP) in salient pole synchronous machines with rotor eccentricity has been investigated. Continuous and noncontinuous damper windings resulted in different damper winding currents, but their effect on the UMP was found to be very similar. Measurements of the UMP, damper bar currents, and air gap flux density were performed on a 12-pole generator with a static eccentricity under no-load conditions. Finite-element simulations of the different configurations detailing the damper winding induced flux changes are also presented.
Keywords :
air gaps; eddy currents; finite element analysis; machine windings; magnetic flux; rotors; shock absorbers; synchronous generators; 12-pole generator; UMP; air gap flux density; continuous damper winding current; damper bar current; damper winding induced flux; finite-element simulation; noncontinuous damper winding; rotor eccentricity; salient pole generator; salient pole synchronous machine; static eccentricity; unbalanced magnetic pull; Damper winding; eddy currents; hydropower generator; rotor eccentricity; synchronous generator; synchronous machine; unbalanced magnetic pull (UMP);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2013.2259633
