Dynamics of D-C machine systems

A generalized block diagram representation of the signal transfer properties of d-c machine systems with various kinds of feedback is developed in terms of gain factors, time constants, and feedback ratios, including the mutual coupling effects between windings and the nonlinear effects produced by saturation. The resulting formulation of the dynamic properties is simple enough to permit a rapid evaluation of the action of feedback in d-c machine systems and therefore to help in determining which feedback combinations will secure a desired system performance.