Affect the design and performance of motor magnetic circuit. The size of stator slot has a direct influence on the magnetic field density of motor. If the stator slot is small, the magnetic flux generated by the magnet is less, and the magnetic density of the motor magnetic field is correspondingly small. If the stator slot is large, the magnetic flux will also increase, and the magnetic density of the magnetic field will also increase accordingly. Therefore, designers will choose different stator slot sizes and shapes according to specific working conditions and requirements when designing the motor to optimize the design and performance of the motor.