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.