Automation & Control
VFD / Variable Frequency Drive
An electronic drive that controls AC motor speed and torque by changing supply frequency and voltage.
IN ONE SENTENCE
It lets a motor run at more than just full speed or stopped.
In normal English
VFDs improve process control and can save energy on pumps and fans, while introducing EMC and motor-management considerations.
Why would I use it?
Use it when an AC motor's speed needs to be adjustable.
THINK OF IT LIKE…
An electronic accelerator pedal for an AC motor.
Related terms
motor, analogue output, fieldbus
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