摘要：A p.rticle Swarm Op.imization (p.O) based design of three-p.ase induction motors are p.op.sed. The induction motor design is treated as a non-linear and multivariable constrained op.imization p.oblem. The annual material cost and the total annual cost of the motor are chosen as two different objective functions. The p.O is used to find a set of op.imal design variables of the motor which are then used to p.edict p.rformance indices and the objective functions. The p.op.sed method is demonstrated for two samp.e motors, and it is comp.red with the genetic algorithm (GA) and the conventional design methods. The results show that the p.O-based method effectively solved the induction motor design p.oblems and outp.rforms the other methods in both the solution quality and comp.tation efficiency.