Modelling of inductance machines for electric drives

Most analyses of inductance machine drives make use of a conventional linear machine model, either in the form of self and mutual inductances or the familiar T-form of equivalent circuits. This model is actually more complex than necessary for analysis in the linear regime. On the other hand, it is inadequate for use when the machine is saturated. The author presents several linear and nonlinear models suitable for transient and steady-state analysis. The models are presented in equivalent-circuit form to preserve the identity of nonlinear parameters. A note on modeling of time harmonics is included.<>