Inductance characterization of a SRM using finite element simulation data

FE simulation data provides information about magnetic properties corresponding to a range of foreseen current excitation and rotor positions. This information needs further processing to derive other electric parameters, among which, inductance plays an important role for simulation and modeling purposes. This paper describes this process looking for analytical expressions and evaluating the incidence of simplicity against accuracy. Although searching for analytical expressions is usually justified by time saving, in this case it is because analytical expressions are necessary to model the machine as a second order nonlinear system using analytical equations. This representation provides a better insight in the understanding of the behavior of autonomous self-excited AC switched reluctance generators.