I have a blower that is run by a 10hp single phase 220V electric motor. Right now it is a single speed, but I would like to be able to vary its speed. I know if it was a 3 phase motor I would be able to use a VFD, but being single phase I am unsure where to look to build/buy some kind of speed control for it.
Any ideas would be appreciated.
Thanks,
Brian
Blower speed control question
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by bseibenick3137 » Wed Nov 21, 2007 11:26 am
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by Tony » Wed Nov 21, 2007 5:00 pm
Single phase induction motors cannot run smoothly at greatly reduced speed, which is why it is not commonly done. Your best bet would definitely be to replace it with a three phase motor run from a VFD.
Also known as the infamous "Warpspeed" on some other Forums.
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by bseibenick3137 » Thu Nov 22, 2007 11:56 am
If I replace my existing 10hp 1ph motor with an equivalent 3ph motor, do you know offhand what 3ph hp rating I would need? I used to know this but unfortunately I haven't used me EE degree in a few years...
Thanks,
Brian
Thanks,
Brian
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by Tony » Thu Nov 22, 2007 4:39 pm
Brian, if the blower needs 10Hp to drive it, then it will require a similar 10Hp (or larger) rated motor to drive it, regardless of the type.
Also known as the infamous "Warpspeed" on some other Forums.
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