Abstract

This paper evaluates the performance of a separately excited direct current motor (SEDCM) closed loop system for water pumping using an armature voltage-controlled motor scheme. The direct current motor is fed by the PV module as a DC voltage source, and the water pump speed is the output. The conventional Proportional-Integral-Derivative (PID) controller and the fuzzy logic controller (FLC) are designed in MATLAB/SIMULINK software. The FLC was developed based on the Mamdani architecture with the centroid defuzzification method. The controller evaluates speed errors in order to track the reference step input voltage. The dynamic behavior of the motor in terms of transient response, such as settling time and peak overshoot, for both the FLC and PID controllers was evaluated as the simulation results were analyzed and compared. It was discovered that FLC offers better performance with a faster dynamic response than conventional PID controllers. The robustness of the controllers was tested with disturbance as well as variable load conditions.