The asymmetrical stator as a means of starting single-phase induction motors

E. E. Dreese (Ohio State University, Columbus, Ohio): It has been known for sometime that by the use of asymmetry it is possible to obtain starting torque in a single-phase motor with a single winding Such a motor is economically and technically desirable because of the simplicity in avoiding a separate starting winding and switch and, therefore, giving an attendant saving in manufacturing cost Another advantage is the avoidance of maintenance troubles and outages, since by far the greatest single factor causing breakdowns in single-phase motors is trouble with the starting winding and its automatic switch.