Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 232
magnitudethat an E.M.F. is generated in the short-circuited coils bytheir rotation which is equal but opposite to the reactancevoltage. The action of the interpoles is therefore entirely 220 DYNAMO ELECTRIC MACHINERY. automatic and enables sparkless commutation at all loadsand speeds. Interpole… … Fig. 135. 135, which operate at a speed of from 100% to 600% ofthe minimum speed. The data of a 5-H.P. interpole motor follow :Resistance of shunt field 175 ohms. Resistance of armature 1.18 ohms. Resistance of interpolar windings 0.21 ohm.Armature current at full load 22 to 24 amperes,Field…
Electric machinery
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