Sensorless adaptive backstepping control of an IPMSM drive using extended-EMF method

This paper presents a speed controller for an interior permanent magnet synchronous motor (IPMSM) based on adaptive backstepping method. IPMSM speed is acquired through extended-EMF method, which is simple to achieve and has a good dynamic performance. A novel nonlinear control strategy, backstepping, is used to design speed tracking and current controllers. The system can achieve fast speed tracking and torque response. The paper gives the proof of system stabilization. Matlab simulating results confirm the veracity of the proposed approach.