This paper is an ultra high-energy efficiency 2200W four-pole three-phase asynchronous motor which comprises a stator and a rotor. Design of external diameters, internal diameters, length of iron cores, number of punching sheet grooves, and shape and size of the grooves of the stator and the rotor is systematically optimized so that stator winding loss, rotor winding loss, and iron core loss are substantially reduced. Compared with existing similar products, the total energy loss amount is reduced from 505.5W to 291.4W, and the reduction is 42.4% under the premise of the same output power of 2200W. The required input power is reduced from the original 2.706kW to 2.491kW, the energy conversion efficiency is increased from 81.3% to 88.3%, and the increment is 7.0%. Compared with the standard of IE3-86.7% Efficiency is improved to by changing the stator/ rotor slot number for 2.2kW -4 poles in this paper. An analytical program will investigate average torque and efficiency with different geometrical parameters of rotor bars considering the saturation of magnetizing current. The Squirrel Cage Induction motor-SCIM with 36 stator slots/ 44 and 40 rotor bars are verified underrated power. Their electromagnetic characteristics such as electromagnetic torque, losses, and efficiency are compared in between three 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 a 2.2kW induction motor with fixed stator and rotor diameters.