Multiobjective optimum design of electrical machines for variable speed motor drives

A pragmatic design philosophy for variable speed motor drives that seeks to satisfy all the desirable goals of the designer based on a multiobjective (vector) optimization formulation is presented. Pareto-optimal (noninferior) solutions are found from which the best is chosen based on the designer´s preferences. The design of a current-fed surface-mounted permanent-magnet motor for variable speed application in which the efficiency is maximized and the material and production cost is simultaneously minimized is used to demonstrate the advantages and usefulness of this design approach over most of the existing electric motor design techniques.<>