Li, Y, Zhu, Z Q, Howe, D et al and Bingham, Chris
(2007)
Improved rotor position estimation in extended back-EMF based sensorless PM brushless AC drives with magnetic saliency.
In: Electric Machines & Drives Conference, 2007. IEMDC '07. IEEE International, 3-5 May 2007, Antalya, Turkey.
Full content URL: http://dx.doi.org/10.1109/IEMDC.2007.383579
| Improved rotor position estimation in extended back-EMF based sensorless PM brushless AC drives with magnetic saliency | | An improved extended back-EMF based sensorless control method is proposed for a brushless AC motor equipped with an interior permanent magnet rotor. It accounts for dq-axis cross-coupling magnetic saturation by introducing an apparent mutual winding inductance. The error which results in the estimated rotor position when the influence of cross-coupling magnetic saturation is neglected is analyzed analytically, predicted by finite element analysis, and confirmed experimentally, for various d- and q-axis currents. It is shown that a significant improvement in the accuracy of the rotor position estimation can be achieved by the proposed method, as confirmed by measurements. | | ![[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
An improved extended back-EMF based sensorless control method is proposed for a brushless AC motor equipped with an interior permanent magnet rotor. It accounts for dq-axis cross-coupling magnetic saturation by introducing an apparent mutual winding inductance. The error which results in the estimated rotor position when the influence of cross-coupling magnetic saturation is neglected is analyzed analytically, predicted by finite element analysis, and confirmed experimentally, for various d- and q-axis currents. It is shown that a significant improvement in the accuracy of the rotor position estimation can be achieved by the proposed method, as confirmed by measurements.
| Additional Information: | An improved extended back-EMF based sensorless control method is proposed for a brushless AC motor equipped with an interior permanent magnet rotor. It accounts for dq-axis cross-coupling magnetic saturation by introducing an apparent mutual winding inductance. The error which results in the estimated rotor position when the influence of cross-coupling magnetic saturation is neglected is analyzed analytically, predicted by finite element analysis, and confirmed experimentally, for various d- and q-axis currents. It is shown that a significant improvement in the accuracy of the rotor position estimation can be achieved by the proposed method, as confirmed by measurements. |
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| Keywords: | Permanent Magnet AC Motor, rotor position estimation, Sensorless control |
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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: | 2545 |
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| Deposited On: | 23 May 2010 21:30 |
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