The flux field in the Shaded-pole motor

THE SHADED-POLE induction motor traditionally has been built but not designed. In the present state of the art, it is more practical to build a series of trial motors with modifications to produce the desired characteristics than to design one meticulously and still miss those characteristics. This article is intended to show some of the causes of failure of the usual design procedures. The results are qualitative only, but it is hoped that they will aid designers quantitatively through the use of presently known design constants which have been obtained from experience with their own motors.