Lumped Circuit Impedance Representation for DC Machines

Predicting the transient performance or the steady-state operation of a dc machine supplied by rectified power can best be accomplished by representing the machine´s electrical parameters by lumped circuit constants and then solving the problem by one of the many forms of circuit analysis. A test procedure for determining the lumped circuit constants of a dc machine is described In addition, the test workup procedure is outlined, experimental results are presented, and the procedure described is recommended for inclusion in IEEE test code for dc machines.[1] The procedure described is essentially a frequency response technique.