Efficiency and back EMF are affected by number of the rotor slot number selection on the induction motor design. An analytical calculation will investigate harmonic order of the air gap magnetic flux density back EMF with different geometrical parameters of rotor skewed angle considering of the saturation of the induction motor. The Squirrel Cage Induction motor-SCIM

with 36 stator slots/ 28,32 and 44 rotor bars is under different load. Their electromagnetic characteristics, such as electromagnetic torque, stator current, and magnetic flux density are compared in between those configurations. The paper contributes that the proper rotor slot number selection has a strong impact on the induction motor and the best design is applied for 10hp induction motor with fixed stator and rotor diameters