The current industry-proven back electromotive force (back EMF)-based sensorless control frequently fails at low speeds and is also laborious to use. Interestingly, in this study, these defects can be improved by developing a novel open-loop back EMF observer, where the sensorless drive could operate from 1% to 100% of the maximum speed, and it also enables the direct start-up from the standstill. This indicates one single sensorless control scheme is enough to fit the full speed range for some specific applications. The key technique behind this is a novel open-loop back EMF observer that features easy implementation and no additional filters; meanwhile, it necessitates only the phase resistance and q-axis inductance. An in-depth investigation of the proposed sensorless control from a complex-frequency notation, instead of the classical 2-by-2 matrix notation, is carried out, and an experiment is also conducted to reveal its superior performance over the industry-proven method.


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    Title :

    A Wide Speed Range Sensorless Control for Three-Phase PMSMs Based on a High-Dynamic Back EMF Observer


    Contributors:
    Tian, Bing (author) / Li, Yingzhen (author) / Hu, Jiasongyu (author) / Wang, Gaolin (author) / Molinas, Marta (author) / Zhang, Guoqiang (author) / Wang, Kai (author) / Zhang, Zhuoran (author)


    Publication date :

    2025-02-01


    Size :

    1681949 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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