ABSTRACT
Since the forces impressed on the windings of a synchronous machine due to excessive current are one of the limiting factors in its design, the study of synchronous machine faults is an essential topic in the study of synchronous machines. Analyses of this class of problems become intractable almost from the start unless certain assumptions are made. One of the most powerful techniques for the solution of such problems utilizes the Theorem of Constant Flux Linkages, sometimes referred to as Doherty’s Law. In order to establish Doherty’s Law, consider any group of coupled magnetic circuits. It is now timely to proceed to find the solution for a practical short-circuit condition. It is now possible to consider the total solution including the damper windings. Because the rate at which the amplitude of the alternating component decreases is slow compared to one cycle, it is generally possible to plot the RMS value of the armature current vs. time.
