The full-order flux observer has only been preliminarily applied in high-performance direct field orientation control (DFOC) of induction motors (IMs). However, in high-power and high-speed motor drives, the control system operates under a low switching-to-fundamental frequency ratio (SFR), so the full-order flux observer based on conventional discretization methods no longer meets the requirements due to significant discretization errors. To solve this problem, this article proposes an eigenvalue-based discrete full-order flux observer, and feedback gains are designed in the z-domain to ensure stability and dynamic performance. Additionally, the parameter robustness analysis is conducted on the proposed DFOC system to ensure high parameter robustness in the medium- and high-speed ranges. Rigorous simulations and experiments are performed to verify that the proposed discrete full-order flux observer exhibits a high level of discretization accuracy and the proposed DFOC system achieves excellent stability and dynamic performance under a low SFR.


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    Title :

    Direct Field-Oriented Control of Induction Motor With Discrete Full-Order Flux Observer


    Contributors:
    Zhang, Qinpei (author) / Li, Jian (author) / Lu, Yang (author) / Zhou, Zheng (author)


    Publication date :

    2024-12-01


    Size :

    5323309 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English