Diapositiva 1

1
ELECTRICAL ACTUATORS
Josep Amat and Alícia Casals Automatic
Control and Computer Engineering Department
2
ACTUATORS
1 Pneumatic actuators
Cylinders
Motors
2 Hydraulic actuadors
Cylinders
Motors
3 Electrical actuators
3
(No Transcript)
4
(No Transcript)
5
(No Transcript)
6
D.C. Motors.
Stator
(Inductor)
Stator
Rotor
(Induced)
Serial excitation Parallel
excitation
7
(No Transcript)
8
D.C. Motors.
V I (Re Rr) Vcem
T KI I Fo
Stator
V1
wO
Permanent magnet dc motor
9
(No Transcript)
10
(No Transcript)
11
(No Transcript)
12
A.C. Motors.
Control techniques
The speed of a triphasic motor with permanent
magnet rotor can be controlled by varying the
frequency of the feeding signals.
13
A.C. Motors.
14
Synchronous
Asynchronous (Induction)
15
(No Transcript)
16
Rotor of an asyncronous a.c. motor (Rotor as
squirrel cage)
17
A.C. Motor. (Synchronous)
D.C. Motor.
Tr
w
18
A.C. Motor. (Synchronous)
D.C. Motor.
Tr
Tr
V2
w
w
w0
w2
f0 50 Hz.
U V W
19
Stepper Motors
20
Stepper Motors
21
(No Transcript)
22
S N S N S N S N S N S N S
N S N S N S
23
Internal structure of a two bodies stepper motor,
of two phases
24
Stepper Motors.
Control techniques of a two phases stepper motor