Physical conceptions of induction motor operation

CONFRONTED by the particular behavior of the single-phase induction motor, it is but natural that in order to familiarize ourselves with it, we should substitute for the direct, the indirect description, and explain the single-phase motor by means of the better known polyphase performance. This indirect method originated by E. Arnold and F. Eichberg and recently modified by B. G. Lamme, looks upon the single-phase induction motor as a special case of the polyphase motor and considers it as a revolving field machine.