Mario Greule, Martin Doppelbauer

International Electric Machines and Drives Conference (IEMDC). Coeur D'Alene, Idaho.

Switched reluctance motors (SRM) have a
cheap and robust structure, which makes them interesting for
electric vehicle applications. In this paper, a new optimization
scheme for the design of SRM is proposed. The design
methodology is then used to design a 127 kW high speed SRM
for electric vehicles. The optimization procedure has a
cascaded structure with a geometry optimization as the outer
loop and a new control optimization as the inner loop. This
new control scheme ensures maximum efficiency with the
constraint of a minimum torque ripple by developing a
current profile, which considers the non-linear behavior of the
switched reluctance motor and the declining current dynamics
with increasing speed. The control scheme is used to evaluate
rated power and motor efficiency of the relevant operating
points within the outer geometry optimization of the design
methodology.