Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 254
its field current and the voltagebetween its brushes remain constant. However, the alternatorto be tested must be run at constant speed, and its speed is con-trolled by varying the voltage at the motor terminals by means ofthe field rheostat Rq of the direct-current generator G. In thefigure the… … To outs/de sourceof d/recr current Fig. 197. Diagram of Connections for Core-Loss Test of Alternators The input to the motor armature in watts is equal to the pro-duct of the readings Vi and Ai. Part of this input is consumedin supplying the various losses in the motor armature, includingfriction…
Electrical engineering
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