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 255
alue so assumed, if necessary,later on. In case the core is not cylindrical, we may take thelength of the pole-core as 20 times the length of the air gap if themachine is shunt-wound, and 40 times the length if it is compound-wound. In our case, the total flux entering the armature at rated loadwas… … 214 DIRECT-CURRENT DYNAMOS the pole-cores of 96,000 lines per square inch, we have 8,300,000-r- 96,000 = 86.5 square inches as the area of cross-section of a pole-core. Making them circular in cross-section, we have 2 v86.5 -^ n= 10.5 inches, as the diameter of the pole-cores. Fig. 258. Makingthe…
Electrical engineering
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