A Single-Phase Induction Motor with One Distributed Winding

A single-phase induction motor with one winding develops starting torque if the stator iron is not symmetrical about the winding axis. Four methods of producing the dissymmetry are described. The most significant design variables are rotor resistance, the location of the dissymmetry, and the difference of the magnetizing reactances perpendicular to and along the dissymmetry. Test and calculated data are shown. The motor can be used where low starting torque is required and, under certain conditions, it is superior to other motors.