. The influence of varying reactance upon the short circuit phenomena in alternators. plotted betweenspeed in R. P. M. and time in seconds from which the decelerationis determined. Bar. Herlan proves that the rate at which theenergy is dissipated by the losses occurmg in the machine isgiven by tne expression:- 18 Ratts = N is the speed in *S. when the angular decelerationand oi. = 2 n, when n is the deceleration in revolutions persecond per second as determined from the speed-time curve des-cribed above. J is the moment of inerti?. of the armature,determined as follows: The
. The influence of varying reactance upon the short circuit phenomena in alternators. plotted betweenspeed in R. P. M. and time in seconds from which the decelerationis determined. Bar. Herlan proves that the rate at which theenergy is dissipated by the losses occurmg in the machine isgiven by tne expression:- 18 Ratts = N is the speed in *S. when the angular decelerationand oi. = 2 n, when n is the deceleration in revolutions persecond per second as determined from the speed-time curve des-cribed above. J is the moment of inerti?. of the armature,determined as follows: The alternator was driven as a synchron-out motor and the electrical power imput measured* The powerwas now cut off and the decrease in speed determined for equaltime increments. Plotting a curve between and seconds (curve sheet No. VI. page 13 ), n v/as determined, since n = bu x t seconds Then substituting in the equation for power j - Watts M the moment of inertia J can be calculated. _____ 19 CUWE JEEET NO 3ZT DECELERA TION CURVE W/77i Eu// Ee/E a/?J Ab 20 Figure VI. page 20 is a diagram of connections to determinetre short-circuit power. , Geme-Yoto-rDirect Connected~7b F\ I Tern aTto r
Size: 1464px × 1707px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1913
