Tests on armature resistance of synchronous machines

Armature resistance of synchronous machines, although usually disregarded when making torque-angle and excitation calculations, must be taken into account when making an accurate analysis. Values of armature resistance obtained in a series of tests are presented in this paper, which is a companion paper to “Test Values of Armature Leakage Reactance” in this issue, pages 700–5. Discussion of test methods, the effect of pole form on losses, and the use of effective armature resistance in determining the vector diagram of the machine are included herein.