Performance calculations on the two-speed shunted capacitor motor

Equations are developed in this paper for predicting the performance of a shunted capacitor motor, that is, a capacitor motor in which the main and auxiliary windings are connected in series and the capacitor is shunted across the auxiliary, or the main, winding. As such a connection has often been used for a two-speed motor, performance equations for the high-speed connection are included. Speed-torque curves for a representative motor were calculated, using these equations, and plotted for purposes of illustration.