Moog Animatics SmartMotor™ Developer's Guide,Rev. L
Page 871 of 909
Resolution
The smallest increment into which a parameter can be broken down. For example, a 1000-line
encoder has a resolution of 1/1000 of a revolution.
Resonance
Oscillatory behavior caused by mechanical or electromechanical harmonics and limitations.
Ringing
Oscillation of a system following a sudden change in state.
RMS Current - Root Mean Square Current
In an intermittent duty-cycle application, the RMS current is equal to the value of steady state
current that would produce the equivalent motor heating over a period of time.
RMS Torque - Root Mean Square Torque
In an intermittent duty-cycle application, the RMS torque is equal to the value of steady state
torque that would produce the equivalent motor heating over a period of time.
Rotor
The moving part of the motor, consisting of the shaft and magnets. These magnets are
analogous to the field winding of a brush-type DC motor.
Settling Time
The time required for a parameter to stop oscillating or ringing and reach its final value.
Slave (/ Master)
One or more devices that are being controlling by an upstream device, or master. For
example, it could be one or more SmartMotors and other devices being controlled by a PLC
(e.g., via fieldbus communications), one or more SmartMotors being controlled by a
SmartMotor (e.g., Combitronic communications). Slave, in follow mode or cam mode, refers
to the intermediate counts produced by the trapezoidal move profile.
Speed
Describes the linear or rotational velocity of a motor or other object in motion.
Stall Torque
The amount of torque developed with voltage applied and the shaft locked or not rotating. Also
known as locked-rotor torque.
Stator
The nonmoving part of the motor. Specifically, it is the iron core with the wire winding in it
that is pressed into the frame shell. The winding pattern determines the voltage constant of
the motor.
Appendix: Glossary
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