Abstract :
P. H. Trickey (Diehl Manufacturing Company, Elizabethport, N. J.): It is not to be wondered at, that Mr. Lloyd became discouraged in attempting to use the classical textbook formula for the D2L of an induction motor when he found such variations in the so-called fundamental factors. Perhaps one of the reasons for the discrepancies, is that as far as I was taught by the older engineers, and as far as I have been able to determine myself, the horsepower of an induction motor is a function of the (OD)2W where OD is the diameter of the stator lamination, and W the core stack and not of the D2L of the rotor. I have personally found that I could vary the rotor diameter and proportions of iron and copper through quite wide ranges with only small effect on the performance, but that I always had to have the same (OD)2W to equal a competitor.
