the waveform with a given starting speed is obtained. The P-I adjustment can run stably after debugging. If the parameters are not set well or the connection method is improper, it will cause overshoot, and even need several times of Oscillation to be stable. Principle of integral control integral control speed regulation system, test conditions C16.8 LF1, no load IA 1.5 a, sudden acceleration high speed starting speed waveform. From the whole debugging process, the system runs stably, the regulator can be adjusted easily, and the parameters can be overregulated, but the dynamic speed drop is a little larger. Slip Frequency Control Slip Frequency control is based on the air-gap flux of the motor, constant conditions.