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

% This file contains the design parameters to model a DC motor

J = 0.01; % Moment of Inertia of the rotor in kg-m^2

B = 0.1; % Moment viscous friction constant in N-m-s

km = 0.01; % Back EMF constant in v/rad/s

kt = 0.01; % Motor torque constant in N-m/amp

Ra = 1.0; % Resistance of the armature circuit in ohms

La = 0.5; % Inductance of armature circuit in henries

%% Design of PID Controller

A = [-B/J kt/J; -km/La -Ra/La];

B = [0 ; 1/La];

%% Placement of Poles

fn = 1.0;

wn = 2*pi*fn;

zeta = 0.5;

p1 = -zeta*wn+wn*sqrt(zeta^2-1);

p2 = -zeta*wn-wn*sqrt(zeta^2-1);

p = [p1 ; p2];

K=place(A,B,p);

% end

Body of Content: The DC motor are modelled under Proportional, Integrative and Derievative (PID) model. It was a closed loop model were the feedback voltage was designed to create a circuit (or) loop.