Improvement of PMSM Torque Accuracy with On-line Estimation of Permanent Magnet Flux Linkage and q-axis Inductance

This paper propose a method to improve torque accuracy of Permanent Magnet Synchronous Motor (PMSM). The main reason for not attaining the high torque accuracy is due to the parameter variation in the permanent magnet flux linkage and q-axis inductance. The proposed method provides a novel online estimation method for the parameter estimation of the flux linkage and the q-axis inductance. By using the online estimated parameters high torque accuracy has been achieved. The proposed method is verified by experimental results.