Improved Design-Oriented Analytical Model for Switched Reluctance Machines Unsaturated Inductances

Design-oriented modelling of switched reluctance machines is gaining more and more attention as it provides an attractive solution to the considerable computational burden associated to preliminary design stages.This work proposes a novel analytical model to determine the unsaturated inductance values, particularly in non-overlap conditions, based on a twofold improvement of the permeance method: the use of elliptic flux tubes, and the ability to self-tailor the flux tube shapes to any machine geometry.Finally, the accuracy of the proposed model is proven against finite element analysis applied to four designs, along with experimental results of a physical prototype.Selftailoring is also assessed and its implementation in an automated design routine is analysed.