Original article: A sensorless PMSM drive using modified high-frequency test pulse sequences for the purpose of a discrete-time current controller with fixed sampling frequency

  • Authors:

  • Frederik M. De Belie;Peter Sergeant;Jan A. Melkebeek

  • Affiliations:

  • Department of Electrical Energy, Systems and Automation (EESA), Ghent University (UGent), Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium;Department of Electrical Energy, Systems and Automation (EESA), Ghent University (UGent), Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium and Department of Electrotechnology, Faculty of Applied E ...;Department of Electrical Energy, Systems and Automation (EESA), Ghent University (UGent), Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium

  • Venue:
  • Mathematics and Computers in Simulation
  • Year:
  • 2010

Quantified Score

Hi-index 0.00

Visualization

Abstract

For electrical machines, accurate position estimations at low speed can be obtained from current responses on high-frequency voltage test pulses. Nevertheless, to apply these voltage test pulses the current controller is often interrupted. In this paper, a modified test pulse sequence is discussed for which the current can be controlled without interruption. To generate the modified test pulse sequence, an asymmetric pulse-width modulator is required. The improvement in the dynamic behaviour of the sensorless drive is discussed by simulations including a salient-pole permanent-magnet synchronous machine, the current control loop, the pulse-width modulator and the position estimator.