Variable Frequency Drive

Variable Frequency Drive definition in Computer Security terms:

Acronym(s): VFD

Definition(s): A type of drive that controls the speed, but not the precise position, of a non-servo, AC motor by varying the frequency of the electricity going to that motor. VFDs are typically used for applications where speed and power are important, but precise positioning is not.
Source(s): NIST SP 800-82 Rev. 2 (NISTIR 6859)

Synonym(s): None


reference: CSRC Glossary