An experimental study of single-phase induction motor starting performance and its dependency on winding harmonics

The starting performance of single-phase induction motors is important to all their applications, especially to those in which starting with various load conditions is inevitable. Extensive tests showed that stator winding harmonics have a significant impact on the starting performance. This paper presents the functional dependency between the starting performance and the winding harmonics through numerous test data with direct torque measurements and also through an analytical study. After identifying the importance of sinusoidal windings, the authors discuss the design trade-off between its performance and cost. The variation during starting can be predicted by a new empirical approach proposed and it has been verified by a special motor design