Sensorless Speed Control of IPMSM Using Deadbeat Extended EMF Observer

This paper presents a new sensorless speed control algorithm for Interior Permanent Magnet Synchronous Motor (IPMSM). The proposed sensorless control algorithm utilizes deadbeat observer to estimate Extended Electromotive Force (EEMF) to obtain the speed and position of IPMSM. The sensorless control algorithm exhibits more precision and robustness through comparison with conventional EEMF estimation algorithm using a least-order observer for variations of speed, load and other parameters. The new algorithm is applied to the motor-pump model. The new algorithm is verified by simulation using MATLAB/Simulink.