Discrete-time sliding mode speed observer for sensorless control of induction motor drives
Discrete-time sliding mode speed observer for sensorless control of induction motor drives
- Author(s): R.P. Vieira ; C.C. Gastaldini ; R.Z. Azzolin ; H.A. Gründling
- DOI: 10.1049/iet-epa.2011.0269
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- Author(s): R.P. Vieira 1, 2 ; C.C. Gastaldini 1, 2 ; R.Z. Azzolin 2, 3 ; H.A. Gründling 2
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View affiliations
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Affiliations:
1: Federal University of Pampa – UNIPAMPA, Alegrete, Brazil
2: Power Electronics and Control Research Group, Federal University of Santa Maria, Santa Maria, Brazil
3: Power Electronics and Control Research Group, Federal University of Rio Grande – FURG, Rio Grande, Brazil
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Affiliations:
1: Federal University of Pampa – UNIPAMPA, Alegrete, Brazil
- Source:
Volume 6, Issue 9,
November 2012,
p.
681 – 688
DOI: 10.1049/iet-epa.2011.0269 , Print ISSN 1751-8660, Online ISSN 1751-8679
This study investigates the rotor speed estimation problem for induction motor drives. The authors propose the design of a scheme based on a discrete-time sliding mode observer which provides the rotor speed estimative. A new algorithm for discrete-time rotor speed estimation is developed and analysed. The conditions for the existence of a discrete-time sliding switching hyperplane are analysed. Moreover, conventional algorithms aiming at the chattering reduction and high-frequency switching on discrete-time implementation are discussed for use with the proposed technique. The stability analysis and parameter convergence of the proposed method are investigated for discrete-time solution. The algorithms developed are tested by experimental results based on fixed-point digital signal processor (DSP) platform (TMS320F2812). Therefore the results demonstrate the good performance of the proposed scheme.
Inspec keywords: induction motor drives; discrete time systems; observers; digital signal processing chips; angular velocity control; stability; convergence; rotors; sensorless machine control; variable structure systems
Other keywords:
Subjects: Digital signal processing chips; Discrete control systems; Velocity, acceleration and rotation control; Stability in control theory; Drives; Digital signal processing chips; Multivariable control systems; Control of electric power systems; Asynchronous machines
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