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Open AccessFeature PaperArticle

A Restarting Strategy for Back-EMF-Based Sensorless Permanent Magnet Synchronous Machine Drive

by and *,†
Department of Electrical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
*
Author to whom correspondence should be addressed.
This paper is an extended version of our paper published in: “Zih-Cing You and Sheng-Ming Yang. A Control Strategy for Flying-Start of Shaft Sensorless Permanent Magnet Synchronous Machine Drive. International Power Electronics Conference, IPEC 2018 ECCE Asia, Niigata, Japan, May 21–24, pp. 651–656”.
Energies 2019, 12(9), 1818; https://doi.org/10.3390/en12091818
Received: 16 April 2019 / Revised: 9 May 2019 / Accepted: 10 May 2019 / Published: 13 May 2019
(This article belongs to the Special Issue Permanent Magnet Synchronous Machines)
Safely starting a spinning position sensorless controlled permanent magnet synchronous machine is difficult because the current controller does not include information regarding the motor position and speed for suppressing the back-electromotive force (EMF)-induced current. This paper presents a restarting strategy for back-EMF-based sensorless drives. In the proposed strategy, the existing back-EMF and position estimator are used and no additional algorithm or specific voltage vector injection is required. During the restarting period, the current controller is set to a particular state so that the back-EMF estimator can rapidly estimate motor voltage without using rotor position and speed. Then, this voltage is used to decouple the back-EMF of the motor in the current controller in order to suppress the induced current. After the back-EMF is decoupled from the current controller, sensorless control can be restored with the estimated position and speed. The experimental results indicated that the induced current can be suppressed within four to five sampling periods regardless of the spinning conditions. Because of the considerably short time delay, the motor drive can restart safely from various speeds and positions without causing overcurrent fault. View Full-Text
Keywords: permanent magnet synchronous machine (PMSM); flying start; sensorless control permanent magnet synchronous machine (PMSM); flying start; sensorless control
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MDPI and ACS Style

You, Z.-C.; Yang, S.-M. A Restarting Strategy for Back-EMF-Based Sensorless Permanent Magnet Synchronous Machine Drive. Energies 2019, 12, 1818. https://doi.org/10.3390/en12091818

AMA Style

You Z-C, Yang S-M. A Restarting Strategy for Back-EMF-Based Sensorless Permanent Magnet Synchronous Machine Drive. Energies. 2019; 12(9):1818. https://doi.org/10.3390/en12091818

Chicago/Turabian Style

You, Zih-Cing; Yang, Sheng-Ming. 2019. "A Restarting Strategy for Back-EMF-Based Sensorless Permanent Magnet Synchronous Machine Drive" Energies 12, no. 9: 1818. https://doi.org/10.3390/en12091818

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