Equations Depicting the Operation of the D-C Motor [includes discussion]

This paper shows how mathematical systems of straight lines or simple curves may be developed to represent the performance of the ordinary d-c motor. The study deals with the shunt and the series motor. Because of the association of the engineer in his early college study with simple mathematical curves such as the straight line and hyperbola, the developed motor equation will enable him to use such curves as references in his thinking when applying a motor to a particular situation.