
G
LOSSARY
BDS5
Glossary-xiv
TTL
Transistor-Transistor Logic.
Variable Frequency Drive
An electronic device used to control the speed of a
standard AC induction motor. The device controls
the speed by varying the frequency of the winding
current used to drive the motor.
Vector Control
A method of obtaining servo type performance from
an AC motor by controlling two components of motor
current.
Velocity
The change in position as a function of time.
Velocity has both a magnitude and a direction.
Voltage Constant (or Back EMF Constant)
A number representing the relationship between Back
EMF voltage and angular velocity. Typically
expressed as V/Krpm.
Zero
A frequency at which the transfer function of a system
goes to zero.
Содержание BDS5
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