NonLinear analytical calculation of magnetic field and torque of switched reluctance machines

The paper deals with the nonlinear analytical harmonic modeling (HM) of 3-phases, and 6-slots/4-poles switched reluctance machine (SRM). The proposed model consists in computing magnetic field distribution and static torque of a conventional winding distribution SRM. Because a SRM has inherently nonlinear characteristics, the analytical subdomain model which does not take into account the saturation has a limited accuracy; this is due to the assumption of infinite tooth permeability. The new analytical subdomain model based on the HM technique, favorable to beyond this limitation, is presented with the consideration of the local magnetic saturation on the teeth. The results obtained with the nonlinear analytical model (NAM) are compared with the analytical subdomain model (without the saturation effect) and nonlinear finite elements method solutions.