Nowadays, due to increase in price of electrical energy, the efficiency is especially important in the design of electrical motors. Since the different types of electrical motors are used in various fields including industry, agriculture, households, etc., increasing the efficiency of electrical motors significantly reduce the consumption of electrical energy. The losses of electrical motors include stator and rotor ohmic losses, core loss, mechanical loss and stray load loss. In this paper, to increase the efficiency, the design parameters of a single-phase two-value capacitor induction motor are optimized by Genetic Algorithm (GA). In order to reduce the copper losses, the copper bars are used for rotor cage. Since for manufacturers the production costs are very important, this factor is also included in objective function. The accuracy of design process and optimization approach are verified by simulation results.

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