Title: Multirate output feedback-based robust sensorless control of doubly-fed induction motor

Authors: Ravi Biradar; Rajshree V. Sarwadnya

Addresses: Department of Electronics Engineering, Pillai College of Engineering, New Panvel, Navi Mumbai, India ' Department of Instrummentation Engineering, Shri Guru Gobind Singhji Institute of Engineering and Technology, Vishnupuri, Nanded, India

Abstract: A robust sensorless control of doubly-fed induction motor (DFIM) is proposed in this paper. The stator of the DFIM is connected to the grid and the rotor is fed via controlled voltage source. Since the speed or flux measurement is not used, the sensorless control is achieved by using multirate output feedback (MROF)-based output feedback technique. The robustness towards parametric variations and matched disturbances is achieved by using MROF-based sliding mode control (SMC). The linear equations of doubly-fed induction motor are utilised for application of MROF and the state reference commands are computed from torque and speed reference commands separately. The proposed MROF-SMC controller is shown to be tracking given torque and speed commands.

Keywords: doubly-fed induction motor; DFIM; output feedback; multirate output feedback; MROF; fast output sampling; sensorless control; sliding mode control; SMC.

DOI: 10.1504/IJIED.2018.099615

International Journal of Industrial Electronics and Drives, 2018 Vol.4 No.4, pp.206 - 214

Received: 23 Nov 2018
Accepted: 16 Jan 2019
Published online: 14 May 2019 *

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