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
- 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
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.

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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

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