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A ROBUST TUNABLE WZZY LOGIC CONTROL SCHEME FOR SPEED
REGULATION OF DC SERES MOTOR DRIVES
Soliman, Hussein F., Mansour, M. M., Kan&l, S. A., . Sharaf
Department of Electrical Engmeering Electrical Engineering Department
Ab Shank University, Cairo, E,wt The University of New Brunswick, Canada
ABSTRACT dynamic speed reference tracking for a dc series
motor. A. simple PWM dc-dc chopper is used as
The paper presents a novel adjustable fuzzy logic the interface converter in the digtal simulation
( EC)speed regulator for speed control of dc to control the dc series motor armature voltage.
series motor. ?he EZC-defuzzification stage Fig. (1) depicts the dc motor drive scheme with
utilizes a modified "weighted centre of ared' the fiC and dc-dc chopper. Figure (2) shows
WCOA switching criterion based on the speed the proposed fuzzy logic control structure with
error excursion. the modified WCOA defuzzifier stage. The
control output is adjusted on-line to ensure a
I. INTRODUCTION bined speed and current excursion
en-or . The paper presents digital simulation
DC motor drives are utilized in multitude of results and the tuning criteria as well as control
applications including steel, paper, mining, validation results for different speed reference
conveyors, traction, ventilation and water trajectories, loading excursions