1. Single phase fully pitched winding armature reaction

2. Single phase fractionally pitched (chorded) winding armature reaction

3. A1A1 Phase pitch 120  electrical Phase pitch 120  B1B1 C2C2  a (reference) bb cc 60  A B C Total= A+B+C Three phase fully pitched winding armature reaction A2A2 B2B2 C1C1

4. A1A1 Phase pitch 120  electrical Phase pitch 120  B1B1 C2C2 Three phase fully pitched winding armature reaction Main factors of armature reaction effect: - Magnitude of armature current - Power factor - Degree of chording