Blower speed control question

A place to discuss air movers, blowers, vacuum motors etc . . . this is a closed forum only open to members

Postby bseibenick3137 » Wed Nov 21, 2007 11:26 am

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
bseibenick3137
 
Posts: 6
Joined: Fri Nov 16, 2007 5:24 pm

Postby 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.
Tony
 
Posts: 824
Joined: Sat Dec 03, 2005 12:34 pm
Location: Melbourne, Australia

Postby 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
bseibenick3137
 
Posts: 6
Joined: Fri Nov 16, 2007 5:24 pm

Postby 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.
Tony
 
Posts: 824
Joined: Sat Dec 03, 2005 12:34 pm
Location: Melbourne, Australia


Return to Air Movers

Who is online

Users browsing this forum: No registered users and 3 guests

cron