Multi-Loop Speed Control System for DC Motor

This paper considers the design, development and verification of the multi-loop motor speed control system. The speed control of a direct current (DC) motor is very crucial in applications where the precision and protection are of interest. In the paper, the DC motor speed control is realized using a switch mode DC-DC chopper circuit. The proposed control system contains three main components: PC-based controllers for the motor current and speed, interface and controlled DC motor. These controllers were designed in Matlab/Simulink program package. The computer is connected to the DC motor via data acquisition card (DAQ Card) and the Visual Basic programming language is employed to conduct the experiment. To compare the outcomes of the original and modified systems with the PID controller, field testing is used. Finally, the system's performance was evaluated in terms of its accuracy error, robustness, and time response. Simulations and experiments were carried out to demonstrate the effectiveness of the proposed control system.