The document discusses modeling a DC motor using Simulink. It first presents the dynamic equations that relate the motor torque, back emf, armature current, and angular velocity. It then shows a DC motor model in Simulink with a voltage input, DC motor block, and scope to display the output waveforms for current, velocity, and voltage. Finally, it provides a transfer function model of the DC motor and a link to a video demonstrating a Simulink simulation of a DC motor using SimpowerSystems blocks.

1. 11
Lecture Series – 8
DC Motor Modeling Using
SIMULINK
Shameer Koya

2. DC Motor Dynamic Model
2

3. Dynamic Equations
 The motor torque, T, is related to the armature current, i, by:
 The back emf, Eb, is related to the angular velocity by:
 The dynamic equations for electrical and mechanical balance from
Kirchhoff's law and Newton's law are
3

4. 4
DC Motor model
110
Voltage I/P
Scope
V
i
w
DC Motor
w
i w, i, V
i
w
2
i
1
w
b
R
Kphi
Kphi
1
s
1
s
1/L 1/J
1
V

5. 5

6. Transfer Function Model
6

7. 7
wVin
1
0.01s+0.01
Transfer Fcn1
0.2
0.0035s+.012
Transfer Fcn
TIa
0.2
Gain
Eb

8. Simpowersystem model
 http://www.youtube.com/watch?v=5eC3kf8-k10
8
powergui
Continuous
Scope
DC Voltage Source
DC Machine
TL m
A+
F+
A-
F-
dc

9. 9
Thanks
Questions ??