Design of a fault-tolerant 6-phase switched reluctance motor for electric power-assisted steering systems

In this paper a six-phase switched reluctance motor for electric power-assisted steering systems is proposed. Based on the specification data the main motor dimensions are obtained via a dedicated sizing-design procedure. The motor parameters and characteristics are computed by using three methods, namely using a finite element model, a magnetic equivalent circuit model and using analytical formulas. The flux linkage and electromagnetic torque as a function of rotor position and phase current are calculated, showing that the steady state motor characteristics are adequate for the purposed drive.