Simulation Of Speed Control of DC Motor Using PID Controller

The speed control of a DC motor is crucial in various industrial and automation applications where precise motion regulation is required. This project focuses on implementing a PID (Proportional-Integral-Derivative) controller for speed control of a DC motor using MATLAB Simulink. The PID controller is widely used due to its ability to improve system stability, minimize steady-state error, and provide smooth speed regulation.The simulation begins with the modeling of a DC motor using Simulink’s Simscape Electrical components. A 5 HP, 240V DC machine is selected for analysis, with separate armature and feld voltage sources. The project explores two key speed control methods: armature resistance control and feld control. The impact of series resistance on motor speed is analyzed by gradually switching resistances in and out of the circuit, demonstrating the correlation between resistance variation and speed regulation. Additionally, a gain block is used to convert speed measurements from radians per second to revolutions per minute (RPM) for better interpretation of results.The implementation of the PID controller ensures that the motor achieves the desired speed efciently while maintaining system stability. Simulations are conducted to observe the system's behavior under different load and resistance conditions. The results validate the effectiveness of PID-based speed control in dynamically adjusting motor speed and responding to changes in operating conditions.This project highlights MATLAB Simulink as a powerful tool for designing and analyzing motor control systems before physical implementation. The study can be extended by integrating real-time hardware platforms such as Arduino, Raspberry Pi, or DSP controllers for practical applications.