A Refined Method of Deriving Reduced Order Models of Induction Machines

A refined method of deriving non-linear, reduced order models of induction machines is presented and evaluated. This method differs from the classical method of neglecting stator transients (pΨ terms) in that only the fast components of the stator flux linkages are neglected when solving for the slower rotor variables. The accuracy of the refined model is assessed by comparing its transient characteristics with those of a detailed model and the standard reduced order model obtain by neglecting the stator transients. It is shown that the refined model more closely approximates the lower frequency characteristics of the induction machine following both large and small disturbances than the standard reduced order model.