What is VFD?

Variable Frequency Drive – A variable-frequency drive (VFD) is a system for controlling the rotational speed of an AC motor by controlling the frequency of the electrical power supplied to the motor.

Other names you may have heard:

  • Variable Frequency Drive (VFD)
  • Variable Speed Drive (VSD)
  • Adjustable Frequency Drive (AFD)
  • Adjustable Speed Drive (ASD)
  • Freq. Drive (Frequency Drive)