Li, Y, Zhu, Z Q, Howe, D et al, Bingham, Chris and Stone, D
(2007)
Improved rotor position estimation by signal injection in brushless AC motors, accounting for cross-coupling magnetic saturation.
In: Industry Applications Conference, 2007. 42nd IAS Annual Meeting., 23-27 Sept 2007, New Orleans, USA.
Full content URL: http://dx.doi.org/10.1109/07IAS.2007.356
| Improved rotor position estimation by signal injection in brushless AC motors, accounting for cross-coupling magnetic saturation | | The 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. A method is also 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: | Conference or Workshop contribution (Presentation) |
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| Item Status: | Live Archive |
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Abstract
The 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. A method is also 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.
| Additional Information: | The 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. A method is also 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. |
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| Keywords: | Sensorless control, Permanent Magnet AC Motor, Signal Injection |
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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: | 2461 |
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| Deposited On: | 16 May 2010 15:18 |
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