VFD Saves Energy?
VFD Saves Energy?
(OP)
Did a search on this subject here on the site, and the closest I came to was this thread, but not the answer I'm looking for: http://www.eng-tips.com/viewthread.cfm?qid=39095
My question is simple. A 3HP 240VAC motor with appropriate VFD drive running at 60Hz continuously 8 hours a day, without intermittent stops and starts. Does the addition of the VFD (versus connecting the motor wihout a VFD) have any power savings ($$$)?
I've heard that using a VFD at constant 60 HZ has savings, but where does that saving come from? What features does a VFD have to save power? I understand how you get savings if you slow down the system to less than 60Hz, but how about at 60Hz?
My question is simple. A 3HP 240VAC motor with appropriate VFD drive running at 60Hz continuously 8 hours a day, without intermittent stops and starts. Does the addition of the VFD (versus connecting the motor wihout a VFD) have any power savings ($$$)?
I've heard that using a VFD at constant 60 HZ has savings, but where does that saving come from? What features does a VFD have to save power? I understand how you get savings if you slow down the system to less than 60Hz, but how about at 60Hz?





RE: VFD Saves Energy?
But, the VFD has additional losses in itself and I do not think that a 3 HP motor can benefit from being fed from a VFD. Not probable.
Gunnar Englund
www.gke.org
RE: VFD Saves Energy?
For certain type of loads where reductions of speed optimize the process, you could have an improved efficiency and then energy cost savings. Expert deep analysis of the complete cycle of each specific type of load is required to find if energy savings are feasible.
RE: VFD Saves Energy?
RE: VFD Saves Energy?
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