Identification of electromagnetic torque model for induction machines with numerical magnetic field solution

In this paper, the identification of a parametric electromagnetic torque model for induction machines is studied. The data for the identification procedure is provided by the numerical impulse response test performed within a 2-D time-stepping finite-element analysis (FEA). The parametric models are obtained from the theory of electric machines. The parameters are estimated using the data obtained from the numerical field solution. Within the impulse test, an assumption of linear behavior in the neighborhood of an operation point is made. As the real electric machine is a nonlinear, time-variant system, the applicability of the impulse test is studied by several means.