Drive to Succeed  Variable-frequency drives, also referred to as
VFDs or drives, are commonly used in industrial applications for
process equipment and heating, ventilating and air-conditioning
(HVAC). However, not all VFDs are the same. It is important to
know the application and to specify the right type with the
correct options in order to achieve the best results.
Variable-frequency drives, also referred to as VFDs or drives,
are commonly used in industrial applications for process
equipment and heating, ventilating and air-conditioning (HVAC).
However, not all VFDs are the same. It is important to know the
application and to specify the right type with the correct
options in order to achieve the best results. VFDs are an
engineered product and a good specification ensures that the VFD
matches the job.  First of all, it is important to size the VFD
correctly to match the type of load that is to be controlled.
Second, the designer must specify options on the VFD that limit
the harmful effects of harmonic