OPTIMUM DESIGN OF VOICE COIL MOTOR WITH CONSTANT TORQUE COEFFICIENTS USING EVOLUTION STRATEGY

An effective optimum design method is presented. The method combines t he three-dimensional boundary element method with the (1+1) evolution strategy. The reduced scalar potential formulation with the magnetic s urface charge as the unknown variable is used under the assumption tha t the yokes are not saturated. It is found, through the numerical exam ple, that the global optimum shape of the magnet can be easily found w ithin a reasonable number of generations. More elaborate design can be achieved by increasing the number of design variables.