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 408
he first to adopt electricityfor motive power on a large scale. This railroad took a radical stepin selecting alternating-current series motors for their locomotives.This type of motor permits the use of a high trolley voltage, so thatthe transmission efficiency is high. By means of transformers… … Fig. 253. Armature and Commutator of Pennsylvania Motor electrical connections are the same as in the direct-current seriesmotor but the field must be weak, the magnetic circuit must belaminated, a compensating winding to neutralize the magnetic effectof the armature on the field must be provided,…
Electrical engineering
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