this presentation gives a clear idea of how the servo motor and servo drive working explained in detail and attached video have a clear idea of how servo motor works......enjoy, i hope you will like this.... :)
2. A servomotor is a rotary actuator or linear actuator that allows
for precise control of angular or linear position, velocity and
acceleration.
Essentially, it consists of an
1. electric motor,
2. feedback device,
3. electronic controller.
3. Motors can be either AC or DC
Can be of 1 phase or 3 phase.
DC motors can be brushed or brushless.
Brushless DC motors are more expensive, drives are more
complex, but are more reliable and maintenance free.
Feedback device for servomotors is typically an encoder or
resolver built into the motor frame.
Control circuitry is a motion controller (generates motion) and
a drive to supply power to the motor
4. AC servo motor
Dc servo motor
Continuous rotation servo motor
Linear servo motor
6. Position control using Pulse Width Modulation Technique.
The width of the pulse applied to the motor is varied and send
for a fixed amount of time.
The pulse width determines the angular position of the servo
motor.
For example
a pulse width of 1 ms -a angular position of 0 degrees,
a pulse width of 2 ms - a angular width of 180 degrees.
7. Electronic amplifier used to power electric
servomechanisms.
A servo drive monitors the feedback signal
from the servomechanism and continually
adjusts for deviation from expected behaviour.
8. linear relationship b/n speed and electric control signal
Steady state stability
Wide range of speed control
Low mechanical and electrical inertia
Fast response
9.
10. Robotics
Conveyor belts
Camera auto focus
Robotic vehicles
Solar tracking system
CNC machines
Antenna positioning
Metal cutting & metal forming m/c – millimg m/c, lathe,
grinding, pressing, punching, bending in metal fabrication.
Textiles
Printers
Automatic door openers