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 267
ce as low as 50 volts are frequentlyused. Another method of obviating the danger referred to, is toprovide short-circuited metal rings around the field poles. Theserings limit the changes of magnetism in the pole-pieces, and therebyprevent the formation of excessively high induced voltages in… … ALTERNATING-CURRENT MACHINERY 223 stationary field of an alternator (synchronous motor) with the ter-minals of each field spool brought out to convenient switches onthe frame of the machine. During starting these switches are open,and when the machine has reached synchronous speed, they are…
Electrical engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
