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 209
draw the air into the machine. Form-wound armature coils are used and the winding is of ware, strap, orbar copper, depending upon the capacity and voltage of the machines.The coils are insulated before they are assembled on the machine.The slots are provided with a lining of fibrous material and… … Fig. 180. Method of Bracing Armature Coils 184 ALTERNATING-CURRENT MACHINERY 173 manner as to insure them against displacement, as shown inFig. 180. Rotor. The revolving field or rotors are constructed with two,four, or six poles, according to the frequency and capacity of the
Electrical engineering
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