Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 83
flux produced is lost inthis way, so that, if O be the fluxin the armature and <l)„j that inthe magnet, <I>„=I-2.0. We will now determine theampere-turns required to producea flux O in the armature of2-5. 10* lines. We must first find the lengthand cross-section of each part ofthe magnetic… … Fig. 60 Hence, Aa= L {D — dg).o-85 = 290 sq. cm. The mean value of l^ is evidently about 20 cm. 29. The Magnetic Circuit 69 To find the cross-section of the path in the air-gaps we must reduce thecylindrical surface of the armature in the ratio /S: 360. We have then oAg=D .IT .L . -2-=420 sq. cm.…
Electrical engineering
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