Method and system for controlling rotating speed of position-sensorless ultra-high-speed permanent magnet synchronous motor based on active disturbance rejection

The invention discloses a position-sensorless ultra-high-speed permanent magnet synchronous motor rotating speed control method based on active disturbance rejection, and the method comprises the following steps: inputting the voltage and current of a stator under a two-phase static coordinate system into a state observer based on an extended back electromotive force observation algorithm; inputting a rotor position signal accompanied by a noise signal into an extended state observer, and inputting a real-time motor rotating speed and a target rotating speed processed by a tracking differentiator into a linear feedback controller together; and outputting the sum of the real-time disturbance quantity of the electromagnetic torque and the load torque, and performing torque analysis to obtain a current instruction required by current closed-loop control. The invention further discloses a position sensorless superspeed permanent magnet synchronous motor rotating speed control system based on active disturbance re