Abstract：Since it was groundless to construct slots of three-phrase asynchronous motors with CAD software, an analytic method was proposed to design the stator and rotor slots of three-phrase asynchronous motors. A threephase squirrel cage induction motor was designed in the analytic method and simulated with Magnet ( magnetic field analysis software) . Comparing the design values of magnetic flux densities of stator lamination's yoke and teeth, air gap and rotor lamination's yoke and teeth with the obtained ones by simulation, the result showed that both of them have less difference and further indicate that the proposed analytic method was correct. Therefore, the analytic method can provide a theoretical basis for designing and optimizing similar slots.

Keyword：three-phase asynchronous motor;analytic method;slot design;magnetic simulation;