Transient Performance of D-C Machinery [includes discussion]

The study that follows illustrates the changes in air gap, leakage and commutating fluxes, constant flux linkage, and bar-to-bar voltages. Eddy-current effects are treated showing their influence on flux change with emphasis of the effect on leakage and commutating fluxes. An evaluation of the error that may be expected when obtaining the air-gap flux by applying the constant flux linkage theorem is presented.