A servomotor is a rotary actuator that allows for precise control of angular position, velocity and acceleration. It consists of a suitable motor coupled to a sensor for position feedback. It also requires a relatively sophisticated controller, often a dedicated module designed specifically for use with servomotors. Servomotors are not a specific ...
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http://en.wikipedia.org/wiki/Servomotor
(from the article `electric motor`) A servomotor is a small induction motor with two stator windings displaced 90° with respect to each other around its periphery. The rotor is usually ... ...a Kaplan turbine each blade can be swiveled about a post at right angles to the main turbine shaft, thus producing a variable pitch. The angle...
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http://www.britannica.com/eb/a-z/s/69
class of motors that operates within a closed-loop system with respect to both position and velocity.
Found on
http://www.empiremagnetics.com/glossary/glossary.htm#A
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