The Apparent-Impedance Method of Calculating Single-Phase-Motor Performance

In the past several years there have been offered a number of calculation methods to be used in connection with predetermining the performance of single- phase induction motors. While such methods are usually based upon either the cross field or the revolving field theory, they differ from each other according to individual preferences. In the present paper there is proposed a method which seems to be convenient and simple, and which, because of symmetry, involves a minimum of charts in carrying out the necessary calculations. The method is proposed because it has been used in one design department for a number of years and found to be very satisfactory as a practical method.