Analysis of unexcited synchronous capacitor motors

A capacitor-reluctance motor is a miniature salient-pole synchronous machine with a squirrel-cage damper winding and unsymmetrical stator windings connected in unsymmetrical circuits. The basic theories applicable to such a piece of synchronous machinery, namely, the symmetrical components, the 2-reaction theory, and the cross-field theory, are well established in engineering literature, and the purpose of this article is to deduce from these theories a comprehensive representation of the capacitor-reluctance motor from which the motor characteristics — for example, the starting torque, synchronous pull-out torque, torque angle, efficiency, and so forth — can be calculated readily with useful accuracy.