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Forum topic by Dogbone posted 11-04-2011 11:23 PM 1024 views 0 times favorited 2 replies Add to Favorites Watch
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13 posts in 2511 days

11-04-2011 11:23 PM

I have a chance to buy a (3) phase 7-1/2 h.p. tablesaw, and need to convert the single phase into 3 phase power.
Have looked in ebay and on-line for single in, and 3 out at 7.5 h.p., and most range from $600.00 to $2000.00. Of course ebay sellers will tell you up to 75 h.p., but not tell you 3 phase in and 3 phase out. Teco has a nice unit, but only supplies 3 h.p. max. Anyone know of any devices made by any company that are reconditioned or anyone that may have a V.F.D. reasonably? Thanks

2 replies so far

View SASmith               's profile


1850 posts in 3014 days

#1 posted 11-04-2011 11:37 PM

I wish I could help.
I have a 4HP VFD I picked up for around 100 dollars on ebay.
The big ones are very expensive. I have held off buying some large equipment because of the cost of converters/VFDs.

If you do find a cheaper 7.5-10 HP VFD get a copy of the users manual before you buy it. My 4HP VFD came with instructions in chinese. Luckily I found a translation online.

Good luck in your search.

-- Scott Smith, Southern Illinois

View TopamaxSurvivor's profile


18290 posts in 3703 days

#2 posted 11-05-2011 12:31 AM

You can feed most drives with 2 in and 3 out, but will have to over size them by at least 50% or there abouts. Make sure you can input 208 or 240. If is 480 yoiu will probably need a transformer to step up for input. There are all kinds to them out there, Just be sure what the input voltage is. The drive can literally make anything you want out of anything you put in, but the controls have to have the proper voltage to get it started.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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