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 253
tartingspeed. This, of course, is done through the agency of the controllerin one, two, or three steps, thus giving the motor two or three speedsas may be desired. These speeds are about 375 r. p. m. to startwith, and 950 r. p. m. for full speed. In high speed elevators running at 350 to 400 f. p.… … Fig. 124. Alternating-Current Type of Elevator MotorCourtesy of Warner Elevator Manufactvring Company These results may be obtained either through the medium of theoperating switch or by an automatically operating device attachedto the controller. Alternating=Current Motors. With motors built to…
Electrical engineering
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