A theoretical investigation of transformer design . Therefore the final for si of the equation becomes 4TT(N* )2 7\ 1 L = z + z +g x henries Since the dimensions of the core-section determine the length of themean turn, it is evident that by increasing the density in this part of thecircuit the cost, copper loss and also the reactance may be reduced. However,the iron loss and especially the magnetising current will be increased at thesame time. To determine what density is best for this part of the circuit,10 and 30 K. V. A. transformers were designed for four different densities,60,000,
A theoretical investigation of transformer design . Therefore the final for si of the equation becomes 4TT(N* )2 7\ 1 L = z + z +g x henries Since the dimensions of the core-section determine the length of themean turn, it is evident that by increasing the density in this part of thecircuit the cost, copper loss and also the reactance may be reduced. However,the iron loss and especially the magnetising current will be increased at thesame time. To determine what density is best for this part of the circuit,10 and 30 K. V. A. transformers were designed for four different densities,60,000, 75,000, 90,000 and 105,000 lines per square inch, the density in theyoke being kept constant at 60,000. Having no basis upon which to choose theproper number of turns, different values of volts per turn were used untilreasonable results were obtained. he curves, Fig. 6 , 7 , 0, 9 , 10 , 11,show the results, and if the better values of volts per turn be examined it willbe found that the density in the core can be increased to 90 000 without requir-. U. or i. e. s. pohm s
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912
