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.