IMPLEMENTATION AND POSITION CONTROL PERFORMANCE OF A POSITION-SENSORLESS IPM MOTOR DRIVE SYSTEM BASED ON MAGNETIC SALIENCY

This paper describes position-sensorless control of an interior perman ent magnet synchronous (IPM) motor, which is characterized by real-tim e position estimation based on magnetic saliency. The real-time estima tion algorithm detects motor current harmonics and determines the indu ctance matrix, including rotor position information. An experimental s ystem consisting of an IPM motor and a voltage-source pulsewidth modul ation inverter has been implemented and tested to confirm the effectiv eness and versatility of the approach. Some experimental results show that the experimental system has the function of electrically locking the loaded motor, along with a position response of 20 rad/s and a set tling time of 300 ms.