Speed sensorless control system based on sliding-mode observer of Kalman filter

The invention discloses a speed sensorless control system based on a sliding-mode observer of a Kalman filter. The system comprises an inverter module, a PMSM module, a first Clark transformation module, a Park transformation module, a second Clark transformation module, a Kalman observer module, a first comparator module, a first PI adjusting module, a second comparator module, a second PI adjusting module, a third comparator module, a third PI adjusting module, a Park inverse transformation module and an SVPWM module; the revolving speed and the rotor position are estimated by adopting the sliding-mode observer of the Kalman filter, and speed regulation of the motor is controlled by estimating the rotor position and the rotor speed. According to the speed sensorless control system, the rotor position and the revolving speed information of the motor are acquired by replacing a mechanical sensor with a speed sensorless control algorithm, therefore, errors in closed loop feedback information are reduced, the c