Analysis and reducing methods of cogging torque on permanent magnet AC servo motor

How to reduce cogging torque of servo motor is a difficult problem in the design, manufacture and application process due to the high requirements of positioning accuracy and performance. In this paper, analysis models of different cogging torque are compared based on the theory of the cogging torque, the method to suppress cogging torque in 6-pole 36-slot motors are summarized, the scheme to optimize cogging torque is given through the design of the prototype. And the effect of the solder bath can not be ignored in the motor design process. Take the 6-pole 36 slot prototype as an example, the effect of factors such as solder bath on the cogging torque is analyzed, the scheme to reduce the effect of solder bath is given according to the comparison.