Discussion on “AC Drive Observability Analysis”

Authors: Mohamad Koteich, Abdelmalek Maloum, Gilles Duc, Guillaume Sandou

Journal: IEEE Transactions on Industrial Electronics, 62(11):7224–7225.

DOI: 10.1109/TIE.2015.2438777

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Abstract: In the paper by Vaclavek et al. ( IEEE Trans. Ind. Electron., vol. 60, no. 8, pp. 3047-3059, Aug. 2013), the local observability of both induction machine and permanent-magnet synchronous machine (PMSM) under motion-sensorless operation is studied. In this letter, the “slowly varying” speed assumption is discussed, and the PMSM observability condition at standstill is revisited.

Discussion on “A Differential Algebraic Estimator for Sensorless Permanent-Magnet Synchronous Machine Drive”

Authors: Mohamad Koteich, Abdelmalek Maloum, Gilles Duc, Guillaume Sandou

Journal: IEEE Transactions on Energy Conversion, 30 (3), 1137-1137.

DOI: 10.1109/TEC.2015.2459791

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Abstract: Diao et al. are to be commended for proposing a new approach for permanent magnet synchronous machine (PMSM) position estimation, using the differential algebraic theory. In the following comments, we would like to highlight some points concerning the machine observability under the applied approach.

Permanent magnet synchronous drives observability analysis for motion-sensorless control

Authors: Mohamad Koteich, Abdelmalek Maloum, Gilles Duc, Guillaume Sandou

Conference: 6th IEEE International Symposium on Sensorless Control for Electrical Drives – SLED, Sydney, NSW, Australia, 7-8 June 2015.

DOI: 10.1109/SLED.2015.7339264

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Abstract: Motion-sensorless control techniques of electrical drives are attracting more attention in different industries. The local observability of sensorless permanent magnet synchronous drives is studied in this paper. A special interest is given to the standstill operation condition, where sensorless drives suffer of poor performance. Both, salient and non-salient machines are considered. The results are illustrated using numerical simulations.