Li, Y., Zhu, Z. Q., Howe, D. et al, 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
Full content URL: http://dx.doi.org/10.1109/TIA.2009.2027518
| 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]](http://eprints.lincoln.ac.uk/style/images/fileicons/application_pdf.png)
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| Item Type: | Article |
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| Item Status: | Live Archive |
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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.
| 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. |
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| Keywords: | Sensorless control, Brushless AC motor |
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| Subjects: | H Engineering > H600 Electronic and Electrical Engineering |
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| Divisions: | College of Science > School of Engineering |
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| ID Code: | 2900 |
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| Deposited On: | 16 Jul 2010 08:04 |
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