A Method for Simulating Electric Machines

In this paper a method is given to simulate electric machines on analog or digital computers. The windings in both axes of a generalized electric machine, considered as n coupled windings, are first transformed into Pi-equivalents, whose components are closely related to the actual magnetic circuits. The motional electromotive forces being then included, it is possible to draw a signal flow-graph which represents the machine to be simulated. This signal flow-graph leads directly to computer set-ups without differentiators. Also, the technique described in this paper is especially useful when using digital programs since the signal flow-graph does not contain any algebraic loop. It can therefore be used to write a digital program using any available simulation language.