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 442
of the electromotive forcesinduced in the rotor windings is the same as the frequency of the stator volt-age, namely, 60 cycles per second. Efficiency and RotorResistance. For a givendifference (n—w) betweenfield speed and rotor speed,a definite electromotiveforce is induced in the rotorconductors,… … Fig. 338. Iron Stator Frame for WestinghouseInduction Motor value (n— n) or for a large value of —- (efficiency) if its rotor resist- n ance is small. High efficiency depends, therefore, upon low rotor re-sistance. The necessity of high rotor resistance to give large torque atstarting has nothing…
Electrical engineering
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