Improved rotor-position estimation by signal injection in brushless AC motors, accounting for cross-coupling magnetic saturation

Li, Y. and Zhu, Z. Q. and Howe, D. and Bingham, Chris and Stone, D. A. (2009) Improved rotor-position estimation by signal injection in brushless AC motors, accounting for cross-coupling magnetic saturation. Industry Applications, IEEE Transactions on, 45 (5). pp. 1843-1850. ISSN 0093-9994

Documents
Improved rotor-position estimation by signal injection in brushless AC motors, accounting for cross-coupling magnetic saturation
This paper presents an improved signal-injection-based sensorless-control method for permanent-magnet brushless AC (BLAC) motors, accounting for the influence of cross-coupling magnetic saturation between the d- and q -axes. The d- and q -axis incremental self-inductances, the incremental mutual inductance between the d-axis and q -axis, and the cross-coupling factor are determined by finite-element analysis. An experimental method is proposed for measuring the cross-coupling factor which can be used directly in the sensorless-control scheme. Both measurements and predictions show that a significant improvement in the accuracy of the rotor-position estimation can be achieved under both dynamic and steady-state operation compared with that which is obtained with the conventional signal-injection method.
[img]
[Download]
[img]
Preview
PDF
improved_rotor_position.pdf - Whole Document

879kB

Official URL: http://dx.doi.org/10.1109/TIA.2009.2027518

Abstract

This paper presents an improved signal-injection- based sensorless-control method for permanent-magnet brushless ac (BLAC) motors, accounting for the influence of cross-coupling magnetic saturation between the d- and q-axes. The d- and q-axis incremental self-inductances, the incremental mutual inductance between the d-axis and q-axis, and the cross-coupling factor are determined by finite-element analysis. An experimental method is proposed for measuring the cross-coupling factor which can be used directly in the sensorless-control scheme. Both measurements and predictions show that a significant improvement in the accu- racy of the rotor-position estimation can be achieved under both dynamic and steady-state operation compared with that which is obtained with the conventional signal-injection method.

Item Type:Article
Additional Information:This paper presents an improved signal-injection- based sensorless-control method for permanent-magnet brushless ac (BLAC) motors, accounting for the influence of cross-coupling magnetic saturation between the d- and q-axes. The d- and q-axis incremental self-inductances, the incremental mutual inductance between the d-axis and q-axis, and the cross-coupling factor are determined by finite-element analysis. An experimental method is proposed for measuring the cross-coupling factor which can be used directly in the sensorless-control scheme. Both measurements and predictions show that a significant improvement in the accu- racy of the rotor-position estimation can be achieved under both dynamic and steady-state operation compared with that which is obtained with the conventional signal-injection method.
Keywords:Sensorless control, Brushless AC motor
Subjects:H Engineering > H600 Electronic and Electrical Engineering
Divisions:College of Science > School of Engineering
ID Code:2900
Deposited By:INVALID USER
Deposited On:16 Jul 2010 08:04
Last Modified:13 Mar 2013 08:42

Repository Staff Only: item control page