The slotting of rotor core of three-phase asynchronous motor is to embed rotor winding, and the slotting of stator is usually to embed stator winding. Moreover, these grooves are all inclined grooves, and the functions of inclined grooves are as follows:

There are harmonics of various frequencies in the motor. Because the stator adopts distributed short-distance winding, the amplitude of harmonic magnetic potential at other frequencies is greatly weakened except tooth harmonic. Because the tooth harmonic winding coefficient is equal to the fundamental wave winding coefficient, the tooth harmonic magnetic potential is almost unaffected. Because the stator and rotor of three-phase asynchronous motor are slotted, the reluctance of the whole air gap is uneven, and the electromagnetic torque and induced electromotive force fluctuate when the motor is running. After the rotor is skewed, the electromagnetic torque and induced electromotive force are similar to the average value of the same rotor bar evenly distributed in the circumferential range, which can effectively weaken the harmonic electromotive force generated by the tooth harmonic magnetic field, thus weakening the additional torque generated by these harmonic magnetic fields and reducing electromagnetic vibration and noise. Although the fundamental electromotive force induced by the rotor will be reduced after the rotor chute, the generally selected chute is much smaller than the polar distance, which has little influence on the basic performance of the motor. Therefore, the rotor chute is widely used in small and medium-sized cast aluminum rotor asynchronous motors.