280 THE BELL SYSTEM TECHNICAL JOURNAL, MARCH 1953 



Using (27) to (30) we can express D in terms of the coil proportions 



D = iku a/- 



(Vl - P' + P)'(3Vl - P2 - 1 4- 2Hy 



(42) 



P'PV(Vi - P2 - P)\2Vl - P^ - 2 + Hf 



Again, eliminating R by use of the constant volume relationship, (31) 



D = kn ^ 



(Vi - p^ + pyisVi - p' - 1 + 2Hy 



p'(Vi - P2)'(2Vl - P' - 2 + i/)' 



(43) 



_2/5 



where ku — 



.26 



.24 



1.20 



tr 

 o 



1 



z 

 o 



V) 



.08 



1.06 



1.04 



1.02 



1.00 



37//« 



0.34 0.36 0.38 0.40 QA2 0.44 0.46 0.48 0.50 0.52 0.54 0.56 



P 



Fig. 6 — Effect of core proportions on dissipation factor when hysteresis 

 can be neglected. 



