Prediction of transient behaviour of electrical machine windings

For economic design of stator winding insulation, a knowledge of voltage distribution within the winding, when the machine is subjected to fast fronted switching surges, is required. The proposed model, based on the traveling-wave approach, is capable of predicting surge voltages at any point in the winding with a reasonable degree of accuracy. The analysis is carried out for a multiphase winding that has a number of coils in each phase and includes the effect of coils in the other phases of the winding using the superposition principle