Aiming at the vibration and noise problems caused by the excessive cogging torque of the six-phase permanent magnet motor,a 12-slot 10-pole surface-mount permanent magnet motor was taken as an example,and a method of opening auxiliary slots on the stator teeth was proposed to reduce the cogging torque.The working principle of cogging torque of permanent magnet motor was analyzed,and the analytical relationship between cogging torque and slotting structure was deduced.The stator tooth slotting method was designed.The position,number and size of the auxiliary slots were further analyzed and optimized.Finally,finite element simulation analyses for the motor before and after slotting were carried out,and performance comparisons were made with the initial motor.The research results show that the auxiliary slot of the stator teeth has a significant effect on suppressing the cogging torque,and the maximum reduction is about 91.8%.The experimental results prove the feasibility and validity of this method.