Contribution to the Theory of Asynchronous Performance of Synchronous Machines with Salient Poles: Part I - Analysis of MMF and Magnetic Field Space Variations, and Armature Current Time Pulsations

Asynchronous transients of a salient pole synchronous machine are studied in this paper. The results of the theoretical analysis, justified by both analog computer and experimental means, are used in explaining the airgap magnetic field space variations and the phase current time variations that occur in a synchronous machine with salient poles during its asynchronous starting transient. This study can also be applied in analyzing other phenomena of synchronous machine transients, for instance, speed-torque characteristics, and magnetic field angular velocity as a function of slip.