Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/152750
Title: Natural speed observer for nonsalient AC motors
Authors: Chen, Jiahao
Mei, Jie
Yuan, Xin
Zuo, Yuefei
Lee, Christopher Ho Tin
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2021
Source: Chen, J., Mei, J., Yuan, X., Zuo, Y. & Lee, C. H. T. (2021). Natural speed observer for nonsalient AC motors. IEEE Transactions On Power Electronics, 37(1), 14-20. https://dx.doi.org/10.1109/TPEL.2021.3094583
Project: NRF-NRFF12-2020-0003
Journal: IEEE Transactions on Power Electronics
Abstract: This letter addresses experimental validation of the reduced-order natural speed observer design for position sensorless drive with nonsalient permanent magnet synchronous motor. The natural speed observer and the active flux estimator are connected in a cascaded fashion, which results in a simple sensorless algorithm that needs only to tune one bandwidth parameter for flux estimation and one bandwidth parameter for speed observation. Experimental results of high speed reversal test, zero speed stopping test, and slow speed reversal test are included, where the practice of applying nonzero d-axis current at zero speed has shown to be effective for loaded zero speed stopping test, but it causes zero-speed lockedup at slow speed reversal with acceleration rate of 50 r/min/s. Four remedies are compared to improve the slow speed reversal test and the proposed method gives almost ramp actual speed waveform, nondiverging q-axis current and smooth transition in position waveform during slow zero speed crossing. A new dynamic expression of the active flux is proposed and with the aid of the active flux concept, the proposed sensorless algorithm is also applicable to various types of ac motors.
URI: https://hdl.handle.net/10356/152750
ISSN: 0885-8993
DOI: 10.1109/TPEL.2021.3094583
Rights: © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: https://doi.org/10.1109/TPEL.2021.3094583.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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