Title :
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
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;
Conference_Titel :
Electrotechnical Conference, 1994. Proceedings., 7th Mediterranean
Conference_Location :
Antalya
Print_ISBN :
0-7803-1772-6
DOI :
10.1109/MELCON.1994.380976
