The Design And Construction of a Magnetic Absorption Dynamometer

The book The Design And Construction of a Magnetic Absorption Dynamometer was written by author Schreiber, H. F Here you can read free online of The Design And Construction of a Magnetic Absorption Dynamometer book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Design And Construction of a Magnetic Absorption Dynamometer a good or bad book?

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Then ^ ^ „ ^ 4 TT N I X 2.54 50,000 = ^ 10 L or the ampere turns are WT - 50.000 X 10 X .04 - 50.000 zs-^r.
rn = ' ■ - ^^ r-'^y ^ = 630 ampere 4 X TT X 2.54 2.54 "TT turns approx.
and NI/ coil = 215 Knowing the ampere turns, the next problem was to determine the size of wire to be used.
Assuming 50 volts per coil, use was made of Ohm's Law.
E a HI Let M = mean length of one turn r** = resistance per inch of conductor N = total number of turns I = current 50 = volts per coil - 20 - Then M X r" X... N = total resistance per coil and I = current Then E s RI or 50 = (M X r" X N) X I and r"= . , ^^.vv = --^ — = .0144 ohms.
M X NI 2.1 X 315 Prom table of Belden Cat. #8 #32 wire has res. of .01365 ohms/ inch #32 •* gives 5960 turns/ sq.in (enameled cotton covered) or 2980 turns / .5 sq. in.
or 1490 " / .25 sq. in.
Cubical space for coil s 5.4864 cu. in (total) #32 wire has 81.35 ohms/ cu, in.
5.4864 X 81.35 = 445 ohms total resistance E » 100 „„._ I - ^ = "445 = .8245 amperes.
Check: - NI = 1490 X .2245 s 335 (larger than req'd) #32 wire has 699.8 ohms/ lb.

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