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Modelling the impact of the stator currents on inductance-based sensorless control of brushless DC-machines

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Abstract
Inductance-based sensorless control methods allow to estimate the rotor position by tracking the magnetic anisotropy linked to the rotor, partly caused by the magnetic saturation of the iron. In most salient-pole machines, the magnetic field in the air-gap may be approached by a sinusoidal function along the airgap. Furthermore, the stator self-inductance mainly varies with two times the electrical rotor angle. In brushless DC-machines however, inductance-based estimations are affected by an important harmonic content in the magnetic field. Besides, it is wellknown that large stator currents cause position estimation errors due to a variable magnetic state. This paper proposes a simple analytical model to take into account the combined effects of the stator currents and the harmonics. The goal is to understand these effects on the position estimation through simulations. The model is specifically developed for surface-mounted permanentmagnet brushless DC-machines with diametric single-slot-pair windings. The results suggest that the combined effects could be used to compensate for the position estimation error.
Keywords
brushless dc-machines, sensorless control

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MLA
Gabriel, Fabien, Frederik De Belie, Peter Sergeant, et al. “Modelling the Impact of the Stator Currents on Inductance-based Sensorless Control of Brushless DC-machines.” Sensorless Control for Electrical Drives, 2nd IEEE International Symposium. Piscataway, NJ, USA: IEEE, 2011. Print.
APA
Gabriel, F., De Belie, F., Sergeant, P., & Neyt, X. (2011). Modelling the impact of the stator currents on inductance-based sensorless control of brushless DC-machines. Sensorless Control for Electrical Drives, 2nd IEEE international symposium. Presented at the 2nd IEEE international symposium on Sensorless Control for Electrical Drives (SLED 2011), Piscataway, NJ, USA: IEEE.
Chicago author-date
Gabriel, Fabien, Frederik De Belie, Peter Sergeant, and Xavier Neyt. 2011. “Modelling the Impact of the Stator Currents on Inductance-based Sensorless Control of Brushless DC-machines.” In Sensorless Control for Electrical Drives, 2nd IEEE International Symposium. Piscataway, NJ, USA: IEEE.
Chicago author-date (all authors)
Gabriel, Fabien, Frederik De Belie, Peter Sergeant, and Xavier Neyt. 2011. “Modelling the Impact of the Stator Currents on Inductance-based Sensorless Control of Brushless DC-machines.” In Sensorless Control for Electrical Drives, 2nd IEEE International Symposium. Piscataway, NJ, USA: IEEE.
Vancouver
1.
Gabriel F, De Belie F, Sergeant P, Neyt X. Modelling the impact of the stator currents on inductance-based sensorless control of brushless DC-machines. Sensorless Control for Electrical Drives, 2nd IEEE international symposium. Piscataway, NJ, USA: IEEE; 2011.
IEEE
[1]
F. Gabriel, F. De Belie, P. Sergeant, and X. Neyt, “Modelling the impact of the stator currents on inductance-based sensorless control of brushless DC-machines,” in Sensorless Control for Electrical Drives, 2nd IEEE international symposium, Birmingham, UK, 2011.
@inproceedings{1898641,
  abstract     = {Inductance-based sensorless control methods allow to estimate the rotor position by tracking the magnetic anisotropy linked to the rotor, partly caused by the magnetic saturation of the iron. In most salient-pole machines, the magnetic field in the air-gap may be approached by a sinusoidal function along the airgap. Furthermore, the stator self-inductance mainly varies with two times the electrical rotor angle. In brushless DC-machines however, inductance-based estimations are affected by an important harmonic content in the magnetic field. Besides, it is wellknown that large stator currents cause position estimation errors due to a variable magnetic state. This paper proposes a simple analytical model to take into account the combined effects of the stator currents and the harmonics. The goal is to understand these effects on the position estimation through simulations. The model is specifically developed for surface-mounted permanentmagnet brushless DC-machines with diametric single-slot-pair windings. The results suggest that the combined effects could be used to compensate for the position estimation error.},
  articleno    = {P26},
  author       = {Gabriel, Fabien and De Belie, Frederik and Sergeant, Peter and Neyt, Xavier},
  booktitle    = {Sensorless Control for Electrical Drives, 2nd IEEE international symposium},
  isbn         = {9781457718540},
  keywords     = {brushless dc-machines,sensorless control},
  language     = {eng},
  location     = {Birmingham, UK},
  pages        = {8},
  publisher    = {IEEE},
  title        = {Modelling the impact of the stator currents on inductance-based sensorless control of brushless DC-machines},
  year         = {2011},
}