Bryan Kilgore for Zondits, April 3, 2015
A recent market report showed that the variable frequency drive (VFD) market has grown globally in recent years. This growth can be attributed to increasing electricity costs, growing electricity consumption, energy efficiency programs, environmental regulations, and increasing infrastructural development. One potential barrier outlined by the report is a low awareness in new developments in VFDs for the manufacturing sector.
Variable frequency drives market – global industry analysis and opportunity assessment 2014 – 2020 shared in new research report
Whatech, March 25, 2015
The three common types of VFDs are:
Current source inversion (CSI)
Voltage source inversion (VSI)
Pulse width modulation (PWM)
CSI VFDs have been successfully adopted in industrial power applications and processing industries. One of the major advantages of CSI, is their ability to produce regenerative power.
VSI VFDs are not commonly used because of their low power and clogging problems.PWM VFDs are used extensively in industrial applications because of their low cost, excellent power factor and efficiency.
Major industry applications of VFDs are HVAC fans and pumps, food processing (agitators, mixers, conveyors for food transport), petrochemicals (oil fields recovery, deep well pumps), mining and metals (cooling beds, reheat furnaces), pulp and paper industry (washers, chippers, vacuums removal systems), transportation (cranes and hoists, small vehicle drives, material handling conveyors), and various other machine tools. In addition, VFDs are also used in air conditioners, outside-air economisers, escalators, modern lifts and energy-efficient refrigerators.