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Online identification of induction machine electrical parameters for vector control loop tuning

Telford, D. and Dunnigan, M. and Williams, B.W. (2003) Online identification of induction machine electrical parameters for vector control loop tuning. IEEE Transactions on Industrial Electronics, 50 (2). pp. 253-261. ISSN 0278-0046

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Abstract

In a vector-controlled induction machine drive, accurate knowledge of the machine electrical parameters is required to ensure correct alignment of the stator current vector relative to the rotor flux vector, to decouple the fluxand torque-producing currents and to tune the current control loops. This paper presents a new method for online identification of the induction machine parameters required to tune a rotor-flux-oriented (RFO) vector control scheme. Accuracy of the slip frequency estimation required for RFO vector control is achieved by utilizing the parameter independent 'flux pulse' rotor time constant estimation scheme, which utilizes short-duration pulses injected into the flux-producing current. The parameters required to tune the synchronous frame current control loops with a decoupling circuit are estimated using a recursive estimation scheme derived from the synchronous frame voltage equations. As the 'flux pulse' scheme requires signal injection into the flux-producing current a new rotor time constant estimation scheme is presented, based on the sensitivity analysis of the recursive parameter estimation scheme. Simulation and experimental results are presented which demonstrate the effectiveness of the online parameter identification and control loop tuning technique.

Item type: Article
ID code: 3585
Keywords: control system analysis, control system synthesis, electric current control, induction motor drives, machine theory, control systems, machine vector control, Electrical engineering. Electronics Nuclear engineering, Control and Systems Engineering, Computer Science Applications, Electrical and Electronic Engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 12 Jun 2007
    Last modified: 04 Sep 2014 11:46
    URI: http://strathprints.strath.ac.uk/id/eprint/3585

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