Moog Animatics SmartMotor™ Developer's Guide,Rev. L
Page 866 of 909
Glossary
The following list provides a glossary of industrial motion terms.
Acceleration
A change in velocity as a function of time. Acceleration usually refers to increasing velocity,
and deceleration to decreasing velocity.
Accuracy
A measure of the difference between expected position and actual position of a motor or
mechanical system. Motor accuracy is usually specified as an angle representing the
maximum deviation from expected position.
Address
A unique identifier assigned to a network device that differentiates it from other devices
operating on the same network.
Ambient Temperature
The temperature of the cooling medium, usually air, immediately surrounding the motor or
another device.
Angular Accuracy
The measure of shaft positioning accuracy on a servo or stepping motor.
Back EMF (BEMF)
The voltage generated when a permanent magnet motor is rotated. This voltage is
proportional to motor speed and is present regardless of whether the motor winding(s) are
energized or unenergized.
Breakaway Torque
The torque required to start a machine in motion. Almost always greater than the running
torque.
Brushless Motor
Class of motors that operate using electronic commutation of phase currents rather than
electromechanical (brush-type) commutation. Brushless motors typically have a permanent
magnet rotor and a wound stator.
Closed Loop
A broadly-applied term relating to any system in which the output is measured and compared
to the input. The output is then adjusted to reach the desired condition. In motion control, the
term typically describes a system utilizing a velocity and/or position transducer to generate
correction signals in relation to desired parameters.
Appendix: Glossary
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