Electrical installations of electric light, power, traction and industrial electrical machinery (1902)
Kennedy, Rankin, d. 1917 · Edinburgh T.C. & E.C. Jack · leaf 112
e arma-ture tunnel, 48 inches, wewill get the length of arcof the polar circle formingthe N and S pole faces ;this will give 18 inches,and as the length of thearmature tunnel is 9 inches,the area is 18x9=162,iust double the section ofthe iron. ^ If now we divide the total flux by the air space… … this the for the iron, and we get a totalof 15,720 as total ampere-turns. Roughly estimated, theexcitinor current for sucha machine workingf at250 volts pressure wouldbe 2 amperes, so th;itthe total turns of wirewould be L>Z1° = 7860, and -:^ = 3920 on eachbobbin.
Electrical engineering · Electric power
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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