When was the last time you discussed variable frequency drives (VFDs)?

VFDs can save tremendous amounts of energy and they are useful in many different applications.  First, VFDs have many different names.  While there may be some slight functional differences between them, for the most part, they do the same thing.  Below are some common names for VFDs:

 ·         Variable-frequency drive (VFD)

·         Adjustable-frequency drive (AFD)

·         Variable-voltage/variable-frequency (VVVF) drive

·         Variable speed drive