Optimal design of a PMSM using concentrated winding for application urban hybrid vehicle

This paper deals with a design method of an external permanent magnet (PM) synchronous motor (PMSM) using concentrated winding (wound around one tooth). The machine is used for the electrical motorization of a small urban hybrid vehicle. Such an application leads to strong design constraints, such as weight limitation, high starting torque, compactness etc. To achieve the design of the machine, an optimization software using SQP method (Sequential Quadratic Programming) is used. The PM synchronous in-wheel motor using concentrated winding is successfully designed: the in-wheel motor, integrated in a standard 15" rim, is able to provide a peak torque of 240 N.m, a peak power of 4,5 kW and a maximal speed of 616 rpm without reduction gear. The optimized motor validation with the finite-element method (FEM) and the discussions about the results are finally presented.