Backstepping control of speed for sensorless permanent magnet synchronous motor
无速度传感器永磁同步电动机反推控制

The speed of a permanent magnet synchronous motor is acquired through a reduced-order Luenberger observer constructed through the stator q-axis current and speed equations. The observer is simple and can achieve fast convergence through adequate eigenvalues placement. A novel nonlinear control strategy -backstepping-is used to design speed tracking and current control. The system can achieve fast speed tracking and torqure response. The proof of system stabilization is also given. Matlab simulation is performed to verify the efficiency and feasibility of the system design.