Calculation and Testing of Damper-Winding Current Distribution in a Synchronous Machine with Salient Poles

Damper-bar currents of a synchronous machine induced during transient asynchronous operation are studied in this paper. Experimental and mathematical methods are used in analyzing an actual synchronous machine. Results of calculations and measurements are presented and compared. All analyses are carried out both for the synchronous machine with a squirrel cage and with a grill (open end rings).