Influence of excitation in the experimental equivalent circuit parameters identification of a switched reluctance motor

Abstract

This paper analyzes the influence of excitation in the experimental determination of flux linkage vs. current vs. position relationship of a switched reluctance motor. Results of the experimental characterization of the SRM in the cases of rectangular bipolar excitation, rectangular unipolar excitation and sinusoidal excitation are compared. An equivalent model of a motor phase including magnetic flux leakage and core losses is presented and the simulation results are discussed. The component values obtained experimentally with sinusoidal excitation are maintained for both cases of rectangular excitation. The good fit between the phase current obtained experimentally and that obtained from the simulation in all three cases demonstrates the validity of the model. This enables the study of the dependence of the effects of the magnetic core on the behavior of a phase of the SRM using the same model.

Non‐linear model of the switched reluctance motor with included core losses’ effects

“…However, since the analytical equations for prediction fluxes in [13] are not accurate enough, the use of the proposed method is limited. An assessment of the average value of the equivalent core-loss resistance in steady state is presented in [14][15][16]. However, this is not acceptable for dynamic modelling, according to [17], since the equivalent core-loss resistance in these models does not depend on the magnetising current.…”