Improved rotor position estimation in extended back-EMF based sensorless PM brushless AC drives with magnetic saliency

Li, Y and Zhu, Z Q and Howe, D 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.

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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.
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Full text URL: http://dx.doi.org/10.1109/IEMDC.2007.383579

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.

Item Type:Conference or Workshop Item (Presentation)
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.
Keywords:Permanent Magnet AC Motor, rotor position estimation, Sensorless control
Subjects:H Engineering > H600 Electronic and Electrical Engineering
Divisions:College of Science > School of Engineering
ID Code:2545
Deposited By:INVALID USER
Deposited On:23 May 2010 21:30
Last Modified:28 Aug 2014 09:24

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