Abstract: This paper presents a novel analytical methodology to model the four-phase 8/6 switched reluctance motor (SRM) for determination of the magnetic flux waveforms within the different sections of the motor. For this, 2-D finite-element analysis (FEA) of the motor is carried out to identify the flux tube plot within the motor at different rotor positions. Equations for calculation of inductance and flux-linkage characteristics of the SRM stator winding are derived as function of the motor specifications, rotor position and the stator current excitation. Voltage equation is then used to obtain the variation of the excitation current versus rotor positions. This obtained current waveform is then used to extend the flux tubes method equations to dynamics mode. Consequently, a model of the 8/6 SRM can be formed via the non-linear dynamic equations to calculate the flux waveform within the stator poles. The results obtained using the analytical method is verified by FEA and actual measurement of the motor. It is shown that this method is capable to predict accurately the flux shape in different portions of the 8/6 SRMs for a given excitation current shape.
Keywords: Flux waveforms; FE analysis; flux tube method; 8/6 SRM.