Y3 series three-phase asynchronous motor is in order to implement state "to the cold and hot" industrial policy and launch out of the domestic first complete whole series adopt cold-rolled steel materials for conduction basic series motor, its efficiency index of GB18613-2002 completely to the small and medium three-phase asynchronous motor allowable value of energy efficiency and energy saving evaluation of the allowable value of energy efficiency, also reached Europe eff2 standards. Is fully enclosed and outer fan cold type the squirrel-cage structure, with low noise, high torque, starting performance is good, instantaneous overload ability strong, compact structure, and convenient usage and maintenance.