COMPENSATION OF RESIDUAL TORQUE USING A DISTURBANCE OBSERVER

Authors

  • ȘTEFAN-AURELIAN NICOLESCU Technosoft International S.R.L
  • AURELIAN SARCA

DOI:

https://doi.org/10.36801/kbhmds55

Keywords:

Motor control, Electric drives, Remanent torque, Disturbance observer

Abstract

A significant number of applications in the electric power drive sector face reduced performance and capabilities due to cost issues. In these cases, accurately tracking a position or speed command is difficult due to the low resolution of position sensors. In addition, low-speed drives using brushless synchronous motors exhibit torque ripple due to the physical construction of the motors and magnetic interactions between the stator and rotor. The proposed solution seeks to minimize the effect of these torque disturbances by identifying and compensating for them in real time using a disturbance observer.

References

(1) Md. Y. Arafat et al. Impacts of Cogging Torque and Its Reduction for an External Rotor Permanent Magnet Alternator, 2016

(2) Y. Lu, C. Wang, J. Huang, Investigation and Analysis of Cogging Torque for Axial Flux Permanent Magnet Machines, 2024

(3) D.C. Hanselman, Brushless permanent magnet motor design, Magna Physics Publishing, 2006.

(4) T. Kmecik, P. Girovsky, T. Basarik, D. Gordan, Computationally Efficient Methods for Cogging Torque Identification and Compensation in BLDC and PMSM Motors, EDPE 2025

(5) W. Huang et al, Comparison of Cogging Torque Compensation Methods for a Flux-Switching Permanent Magnet Motor by Harmonic Current Injection and Iterative Learning Control, IEEE, 2019

(6) G. Ellis, Observers in Control Systems - A Practical Guide, Academic Press, pp. 186-187, 2002

(7) S. Park, S. Lee, Disturbance Observer-based robust control for industrial robots with flexible joints, International Conference on Control, Automation and Systems, October 2007

Published

09.02.2026

Issue

Section

ELECTRIC DRIVES

How to Cite

COMPENSATION OF RESIDUAL TORQUE USING A DISTURBANCE OBSERVER. (2026). ELECTRICAL MACHINES, MATERIALS AND DRIVES — PRESENT AND TRENDS, 21(1), 126-132. https://doi.org/10.36801/kbhmds55