Sensorless Speed Control of PMSM–Magnetic Bearing Using High-Gain Observer


  • Manh Tung Ngo ĐH Công Nghiệp Hà Nội
  • Quang Dang Pham Hanoi University of Science and Technology
  • Quang Dich Nguyen
  • Duc Dinh Nguyen
  • Tung Lam Nguyen Hanoi University of Science and Technology


PMSM, Magnetic self-bearing motor, Back-EMF, High-gain observer


The permanent synchronous motor drive system incorporates magnetic bearings to perform speed control and balance rotor control between the two stators. The paper studies adjusting motor speed sensorless based on measured current components. The electromotive force (back-EMF) generated in the stator is estimated by a High-Gain observer. The angular position and velocity rotor is calculated through the α-β components of the back-EMF. The motor drive is built in a vector control structure based on the rotor flux, using PID controllers to control rotor position and speed. The speed feedback signal is taken from the output of the High-Gain observer. Simulation results in Matlab-Simulink software show that the output speed value of the drive follows the desired trajectory, and the rotor is controlled in the equilibrium position. This also indicates that the High-Gain Observer has a very good speed estimation


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16-09-2020 — Updated on 11-11-2020


How to Cite

Ngo, M. T., Pham, Q. D., Nguyen, Q. D., Nguyen, D. D., & Nguyen, T. L. (2020). Sensorless Speed Control of PMSM–Magnetic Bearing Using High-Gain Observer. Measurement, Control, and Automation, 1(1). Retrieved from (Original work published September 16, 2020)

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