... ENGNG2024 Electrical Engineering E Levi, 20011 STEADY STATE OPERATION OF DC MACHINES 1. INTRODUCTIONElectric DC machines, as indeed any other type of electric machine, can be used toeither produce ... already mentioned, DC machines used to be in the past the major source of DC power. In order to produce electric power DC machines were operated as generators.Nowadays, however, use of DC generators ... circuits of (i) separately and (ii) series excited DC motors andwrite the basic steady- state equations for each type.b) Explain the role of commutator in DC machines using simple representation of...