A tunable fuzzy logic controller for chopper-fed separately excited DC motor drives

Author

Soliman, Hussein F. ; Sharaf, A.M. ; Kandil, S.A. ; Mansour, M.M. ; El-Shafii, M.H.

Author_Institution

Dept. of Electr. Eng., New Brunswick Univ., Fredericton, NB, Canada

fYear

1994

fDate

12-14 Apr 1994

Firstpage

821

Abstract

The paper presents a novel online tunable fuzzy logic controller (FLC) for the speed regulation of separately excited DC motor drives. FLC structure is implemented with linguistic classifications using a hybrid input of motor speed and current errors. The membership grade has been scaled (weighted) by a tuning factor in the defuzzifier stage of the FLC structure. The weighting factor is determined using a dynamic online rule-based scaling criteria of minimum speed excursion. In the defuzzification output stage, a modified “weighted center of area” technique is use to produce a crisp effective output to control the duty cycle ratio of the DC-DC chopper. The paper presents dynamic simulation results for a separately excited DC motor fed from a PWM DC-DC chopper. These results are obtained using the tunable fuzzy logic controller with an online adaptive variable defuzzifier structure and give good dynamic and robust response with minimum inrush motor current

Keywords

DC motor drives; DC-DC power convertors; PWM power convertors; adaptive control; choppers (circuits); control system analysis computing; control system synthesis; digital simulation; dynamic response; electric machine analysis computing; fuzzy control; machine control; robust control; self-adjusting systems; PWM DC-DC chopper; control design; defuzzifier stage; duty cycle ratio; dynamic response; dynamic simulation; linguistic classifications; membership grade; online tunable fuzzy logic control; robust response; rule-based scaling criteria; separately excited DC motor drives; speed excursion; tuning factor; weighting factor; Adaptive control; Choppers; DC motors; Fuzzy logic; Motor drives; Optimal control; Programmable control; Robust control; Surges; Textile industry;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrotechnical Conference, 1994. Proceedings., 7th Mediterranean

Conference_Location

Antalya

Print_ISBN

0-7803-1772-6

Type

conf

DOI

10.1109/MELCON.1994.380976

Filename

380976