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Sensorless second-order sliding mode speed control of a voltage-fed induction-motor drive using nonlinear state feedback.

Rashed, M, Goh, Keng B, Dunnigan, M W, MacConnell, P F A, Stronach, A F and Williams, B W (2005) Sensorless second-order sliding mode speed control of a voltage-fed induction-motor drive using nonlinear state feedback. IEE Proceedings - Electric Power Applications, 152 (5). pp. 1127-1136. ISSN 1350 2352

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    Abstract/Description

    A high-performance and robust sensorless speed-control scheme of a voltage-fed
    induction motor has been developed in which the control of speed and flux is decoupled. A robust
    control strategy, specifically a sliding-mode technique, is considered here. Standard sliding-mode
    control is a type of nonlinear controller and is robust to system uncertainties and parameter
    variation. However, it suffers from the chattering problem. Higher-order sliding mode (HOSM) is
    one of the solutions which does not compromise robustness. In particular, a super-twisting higherorder
    sliding-mode algorithm coupled with equivalent control is considered in the paper for both
    speed and flux control of the motor. A design procedure is developed to determine the controller
    gains. Although the use of HOSM control provides robustness, accurate knowledge of rotor flux
    and machine parameters is still the key factor in obtaining a high-performance and high-efficiency
    induction-motor drive. Sensorless flux-estimation schemes discussed in the literature suffer from
    problems associated with pure integration, instability and sensitivity to stator-resistance mismatch
    at low-speed operation. In the paper, a stable sensorless adaptive rotor-flux estimator using the full
    induction-machine model is proposed. Stable-model-reference-adaptive-system (MRAS) speedand
    stator-resistance estimators based on current estimation are proposed and design details are
    presented. A stable load-torque MRAS estimator has also been developed. Experimental results are
    presented to verify the stability of the induction-motor drive in various operating modes.

    Item Type: Article
    Print ISSN: 1350 2352
    Uncontrolled Keywords: sliding mode control; induction motor; speed control; computing; electrical engineering;
    University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
    Dewey Decimal Subjects: 600 Technology > 620 Engineering > 621 Electronic & mechanical engineering
    000 Computer science, information & general works > 000 Computer science, knowledge & systems > 005 Computer programming, programs & data
    Library of Congress Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
    Q Science > QA Mathematics > QA76 Computer software
    Item ID: 15
    Depositing User: Users 2 not found.
    Date Deposited: 19 Oct 2007 14:47
    Last Modified: 05 Apr 2013 13:46
    URI: http://researchrepository.napier.ac.uk/id/eprint/15

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