Synchronous motor starting performance calculation

MANY METHODS have been proposed and used during the past 50 years for calculating the starting performance of synchronous motors. Although many of these have been quite satisfactory for the bulk of design and application work, each method suffers from one of two basic faults. If the method is simple enough for routine hand calculation, much detail is lost in the solution, and the sweeping assumptions that must be made to simplify the equivalent circuits introduce considerable error. On the other hand, if the method is sufficiently detailed to eliminate these disadvantages, the numerical calculations become very ponderous.