The optimal design of the rotor bar for LSPMSM considering the starting torque and magnetic saturation

This paper presents the optimal design method of cage-bars in a single-phase line-start permanent magnet synchronous motor. This method consists of two procedures. First, the basic design of cage-bars is made by analytic method of an induction motor. But, this method cannot consider nonlinear characteristic as magnetic saturation and leakage flux. Therefore, at second step, for considering the nonlinear characteristics, the optimal design of cage-bars is performed by the response surface method (RSM) and Pattern Search Algorithm (PSA).