Dynamic modeling of SRM including neighboring phase coupling effects

This paper reports a new dynamic modeling method for switched reluctance mo tor (SRM) which can account for neighboring phase coupling effects. The dyn amic model is developed using a few sets of finite element method (FEM)-com puted phase flux linkage/current/position data under the condition of simul taneous excitation of two neighboring phases. The combination of piecewise Hermite cubic spline and Fourier series techniques is used to represent eac h FEM-calculated flux linkage data set. The methods to implement and to ver ify the dynamic model using simulation techniques are presented. The model is ready to be incorporated with various converter topologies and control s trategies. It can provide valuable information for motor design evaluation and its controller design evaluation. The modeling method has been implemen ted using Saber circuit simulator for a 4-phase SRM driven by a split DC-li nk inverter. Dynamic simulation results have been obtained for two differen t SRM winding configurations. The significance of its neighboring phase cou pling effects is evaluated by comparing the simulation results of a model i ncluding the effects with the simulation results of a degraded model neglec ting the effects.