Challenge

Project - Speed Control of a Direct Current (DC) motor

NNishant Mukta12 Aug 2022

Aim :

Speed Control of a Direct Current (DC) motor

Objective :

In this project, a Simulink model for the DC motor will be first developed per the schematic.
Use the Proportional, Integral, and Derivative (PID) control design knowledge gained in training to design, develop and test a controller to maintain a desired speed for the motor.

A mathematical model for DC motor:

`(ω(s))/(Vs(s))=(Kt)/(J*La*s^2+(J*Ra+B*La)*s+(B*Ra+kt*km))`

DC-Motor Parameters :

clc
clear
close all

J = 0.02 ; % moment of inertia kg-m^2
B = 0.2;   % motor viscous constant N-m-s
kb = 0.1; % Back emf constant v/rad/s
kt = 0.1; % motor torque constant N-m/amp
Ra = 2 ; % resistance of armature circuit ohm
La = 0.5 ; % inductance of armature circuit

Plot the response

close

figure(1)
subplot(3,2,1);plot(out.time,out.Vs);grid on;title('Supply Voltage');
subplot(3,2,2);plot(out.time,out.w);grid on;title('Angular velocity');
subplot(3,2,3);plot(out.time,out.Vb);grid on;title('Back emf');
subplot(3,2,4);plot(out.time,out.I);grid on;title('Armature Current');
subplot(3,2,5);plot(out.time,out.T);grid on;title('Torque ');