Calculation of leakage inductances of a salient-pole synchronous machine using finite elements

An analysis method for calculating three components of leakage inductances, i.e. the stator, rotor and winding distribution differential leakage induc tances, which properly represent the amount of each leakage flux in a salie nt-pole synchronous machine is presented. The winding distribution differen tial leakage inductance has a positive value mainly arising from the differ ence between the armature and field winding distributions. The value of the turns ratio must be changed as the saturation condition changes in order t o transform leakage inductances into the proper armature base values. Calcu lated leakage inductances are shown to validate the method. Further investi gations using the presented analysis may generate useful knowledge for pole designs.