Accuracy and simplicity in induction motor calculations [includes discussion]

Abstract
In this paper "accuracy" means confining error to the lowest practicable level. Similarly, "simplicity" means shortness in calculations. Properties that can be shortened with accuracy are the running and starting characteristics. One main conclusion of this paper is that running power factor and efficiency may be obtained with the same accuracy as by present methods, but with greater speed. Another main conclusion is that an accuracy of 0.5% isattainable in torque and current calculations in the starting range, provided more accurate values of end-turn reactance are forthcoming, and with considerable saving of time in calculations. The various sections of this paper may be grouped in three broad classifications: 1) The papers presented at the symposium of the AIEE Middle Eastern District Meeting, Toledo, OH, USA (28-30 Oct 1952), are reviewed, a selection is made of the primitive circuit having least probable error, and a research program mentioned. 2) A new network theorem is proved which aids in the simplification of circuits. 3) A new method of computing skin effect in the bottom cage is given. This will be of use for bars not over 1/2 inch in depth.

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