2. Types of motors
• AC motors
• DC motors
• DC geared motors
• Stepper motors
• Servo motors
3. AC motor
• These are the motors which convert
alternating signal into rotational motion.
• Examples are the motor in water pumps, table
fan, ceiling fan.
4.
5. DC motor
• These are the motors which convert DC
signals into rotational motion.
• In robotics applications they are preferred
over AC motors as the motor and the
complete circuit require same kind of supply
i.e DC supply.
6.
7. DC geared motors
• These are the DC geared motors having
external gear arrangement attached with
motor.
• These are the motors that are most commonly
used in robotics as they are having
considerable torque.
8.
9. Stepper motor
• A type of motor which takes DC pulse input
and gives rotating motion in steps.
• They are of two types :
Unipolar : which moves in one direction
only.
Bipolar : which moves in both directions.
10.
11.
12. Contd....
Stepper motor can be run using ….
Single coil excitation (for clockwise motion)
1000
0100
0010
0001
16. • Servo motors are the most powerful motors
for robotic applications.
• They comes in both varients , AC and DC.
• They can change the direction with same
supply .
17.
18. Contd....
• A servomechanism, or servo is an automatic
device that uses error-sensing feedback to
correct the performance of a mechanism.
• The term correctly applies only to systems
where the feedback or error-correction signals
help control mechanical position or other
parameters.
20. • For both way motion ( clockwise and
anticlockwise ) of one DC motor, an “H-
Bridge” can be employed.
• For both way motion of two DC motors
“dual H-Bridge IC L293D” can be employed.
21. ONLY POSSIBLE SWITCHES SETTING
FOR ROTATION
S1-S4 ON, S2-S3
OFF (for one
direction).
S2-S3 ON and
S1-S4 OFF
(for other direction).
