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Energies 2018, 11(9), 2423; https://doi.org/10.3390/en11092423

Full-Speed Range Encoderless Control for Salient-Pole PMSM with a Novel Full-Order SMO

1
The School of Automation, Northwestern Polytechnical University, Xi’an 710072, China
2
Quanzhou Institute of Equipment Manufacturing, Haixi Institutes, Chinese Academy of Sciences, Jinjiang 362200, China
*
Author to whom correspondence should be addressed.
Received: 15 August 2018 / Revised: 29 August 2018 / Accepted: 30 August 2018 / Published: 13 September 2018
(This article belongs to the Special Issue Control and Nonlinear Dynamics on Energy Conversion Systems)
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Abstract

For salient-pole permanent magnet synchronous motor (PMSM), the amplitude of extended back electromotive force (EEMF) is determined by rotor speed, stator current and its derivative value. Theoretically, even at extremely low speed, the back EEMF can be detected if the current in q-axis is changing. However, it is difficult to detect the EEMF precisely due to the current at low speed. In this paper, novel full-order multi-input and multi-output discrete-time sliding mode observer (SMO) is built to detect the rotor position. With the proposed rotor position estimation technique, the motor can start up from standstill and reverse between positive and negative directions without a position sensor. The proposed method was evaluated by experiment. View Full-Text
Keywords: sliding mode observer (SMO); permanent magnet synchronous motor (PMSM); extended back electromotive force (EEMF); position sensorless sliding mode observer (SMO); permanent magnet synchronous motor (PMSM); extended back electromotive force (EEMF); position sensorless
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Wang, Y.; Wang, X.; Xie, W.; Dou, M. Full-Speed Range Encoderless Control for Salient-Pole PMSM with a Novel Full-Order SMO. Energies 2018, 11, 2423.

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