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

Design parameters of DC motor.

J:-moment of inertia of the rotor(kgm^2)

B:-Motor viscous friction constant (Nms)

Km:-Back EMF constant (rad/s)

Kt:-Motor torque constant(Nm/amp)

Ra:-Armature resistancence (ohm)

La:-Armature Inductance (Henry)

We know,

(JB):-Motor Inertia

Kt:-Gain

(LaRa):-Denominator Coefficient

Given Data:-

Subplot Graph:-

1)

initial value:-0

Final value:-10

step:-0.01

>>subplot(321);plot(out.time,out.A);title('armature');
>> subplot(322);plot(out.time,out.Vs);title('voltage supply');
>> subplot(323);plot(out.time,out.t);title('torque');
>> subplot(324);plot(out.time,out.speed);title('speed');
>> subplot(324);plot(out.time,out.W);title('speed');
>> subplot(325);plot(out.time,out.speed);title('speed');
>> subplot(326);plot(out.time,out.Vb);title('Back EMF');

2)

initial value:-1

Final value:-100

step:-0.01

3)

initial value:-0

Final value:-80

step:-0.08

The speed of the motor depends on the voltage supply and the current. Resistance and gain blocks can follow the main roll to control the speed.