Alternating-current machinery: a practical treatise on alternating-current principles and systems, commercial types of alternators, synchronous motors, transformers, converters, induction motors, switchboard and station appliances, etc. (1912)
American School (Chicago, Ill.), Esty, William, 1868-1928 · Chicago, American School of Correspondence · leaf 246
Fig. 199. Portion of Revolving Field ShowingCopper Frame Dampers ALTERNATING-CURRENT MACHINERY 225 field sets up induced currents in the short-circuited frames or bars ofthe damper, and these currents react on the magnetic field so as tooppose the shifting of the flux and thereby dampen the hunting… … Fig. 200. Rotor of a Synchronous Motor Provided with Squirrel-Cage Form of Damper Torque and Power Output. A given synchronous motor operat-ing with given applied voltage is capable of developing a definitemaximum torque, or of delivering a definite maximum amount ofpower. An attempt to take more…
Electric machinery -- Alternating current
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