Automatic Energy Savings With VFDsJun 30, 2012
The majority of pump applications spend little or no time requiring the motor to run at rated speed. On average these motors can meet demand by running at 70 percent of shaft speed. The additional system capabilities are usually reserved to accommodate future expansions or infrequent increased load demands. Various controllers can be used to run a motor at reduced speed. One such motor controller is a variable frequency drive (VFD).
A variable frequency drive is a reliable electronic device that efficiently operates a three-phase electric motor. A VFD can be used to operate a pump motor at any speed, and operating a pump motor below base speed to meet the requested demand can show significant energy savings. With the energy saving benefits of using variable frequency drives in pump applications having been well established and documented, the costs of their installation can usually be paid back in energy savings within a few years. Read Full Article