A robust self-tuning fuzzy PI scheme for DTC induction motor drive

Authors:
K. Naga Sujatha;K. Vaisakh
Affiliations:
Department of Electrical Engineering, AU College of Engineering, Andhra University, Visakhapatnam 530003, AP, India.;Department of Electrical Engineering, AU College of Engineering, Andhra University, Visakhapatnam 530003, AP, India
Venue:
International Journal of Computer Applications in Technology
Year:
2011

Citing 8
Cited 1

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Abstract

In this paper, application of self-tuning fuzzy PI scheme (STPIFLC) for Direct Torque Controlled Induction Motor (DTC IM) drive is proposed. In the proposed approach, the output scaling factor (SF) is adjusted online by fuzzy rules according to the current trend of the controlled process. The rule base for tuning the output SF is defined on error (e) and change of error (?e) of the controlled variable using triangular equally overlapped membership functions (MFs). The performance of the proposed self-tuning fuzzy PI controller is compared with the corresponding fuzzy logic controller and PI controller. The performance index based on speed error is assigned to provide a numerical comparison among different controllers. Simulation results show that the proposed STPIFLC for DTC IM drive gives remarkably improved performance and high robustness compared with those obtained by the application of a conventional controller (PI).