Ben Hooper
Aluminum
- Joined
- Jan 1, 2008
- Location
- Monroe, ME (home)
I'm looking to power a 1.5 hp 3 ph 440 motor (lathe) from my 220v single shop with hand knob speed control. What VFD make/model and price do you recommend.
Ben
Ben
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There are no single phase 460 volt VFDs so everything he can use will require derating.
single phase input VFDs are available in 230 volt models and some are dual rated but not so in the 460 volt VFDs
There are no single phase 460 volt VFDs so everything he can use will require derating.
single phase input VFDs are available in 230 volt models and some are dual rated but not so in the 460 volt VFDs
The AC Tech drives that I'm using are rated that way.I'm pretty sure my Hitachi SJ VFD drives do not require derating when used as single phase input. Maybe it's because they are designed for either single or 3 phase input?
I doesn't solve any problem stated here but those interested in stepping up 230 to 460 DC should look at "bridge full wave doublers" on your favorite search engine. Sufficently large bridge rectifiers and coupling capacitors can make 230 volt input doublers to 460+ volts DC at 50 amps if the pocket book will bear it.
Be careful when applying this technology to VFD's. The logic power is sometimes supplied from a tiny transformer which will fry when fed DC. It will have to be located and isolated and fed from a separate AC supply - or removed and a suitable logic DC supply provided.
Sorry, I just read my question, and realize it was dumb, in the sense that I knew VFDs could not x-form.
The motor can be wired 3 ph 220V.
I'm really just looking to go from 1 ph to 3 ph, and get variable speed on my lathe.
Ben
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