3 phase motor question???

I haven't a clue about motor phase but was wondering if there is a way I can make use of a 3 phase motor in my shop. This will ,possibly, be for a dust collector system. I have a 200 amp service in my home. Do I need to convert the motor to single phase??? Is this possible in any way to make use of this motor regardless of what I use it for? Wondering in upstate NY. Work safe you all. Chipsmith
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is a way I

,possibly, be for

Do I need

any way to

Wondering in

Chipsmith
Try this link.
http://www.grizzly.com/products/items-list.cfm?key'5030&sort=pr ice
I have used the static converters from them with success.
Tom Plamann www.plamann.com
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The price on variable frequency drives keeps dropping. Here is a 1 HP 230V single phase input, 3-phase output drive: http://web5.automationdirect.com/store/Shopping/Catalog/Drives/AC_Micro_Drives_ (GS_Series)/GS1_Drives/GS1-21P0
In addition to being able to vary the motor speed without changing belts, you have the ability to use the braking function to stop the motor much faster than it coasting to a stop, three wire (magnetic contactor style) on-off control (24 volt), and overload protection built in.
Here's another, for up to 3 HP ... this one is single or 3-phase input, 3-phase output: http://web5.automationdirect.com/store/Shopping/Catalog/Drives/AC_Micro_Drives_ (GS_Series)/GS2_Drives/GS2-23P0
Please note the Grizzly static inverters are rated for 70% continuous HP and 90% intermittent HP, the variable frequency drive is rated for 175% starting torque.
HTH,
Rick

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Hi Chip
I have to wonder where the rest of the dust collection system is and what size motor you are talking about.
You won't be converting the motor to single phase.
As far as using the motor I have no idea as you have not indicated what size it is nor its voltage rating. Its not beyond the range of possibilities to have a 550V rated three phase motor even though the most likely rating is 220/440.
If the given motor fits within a resonable set of parameters you may be able to run the motor off a variable frequency drive (VFD). These are literally getting cheaper every day, but a dust colector probally isn't the best application for this technology. Once you have a variable frequency drive you would be better off using the motor to drive a machine where that feature would be usefull.
Thanks dave
On Sat, 19 Jul 2003 12:13:06 +0000, chipsmith wrote:

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everyone had great answers, however for the price of the static converter you can buy a new motor. so what's the point? Dominic Palazzola snipped-for-privacy@comcast.net

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Dominic Palazzola wrote:

You buy one static convertor and then you can run all of the three phase machines that you can pick up dirt cheap at auctions.
-- Jack Novak Buffalo, NY - USA
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Try this link if you like to tinker.
http://www.metalwebnews.com/howto/ph-conv/ph-conv.html
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If you plan on running more 3-phase equipment you could consider purchasing a phase converter. Otherwise you could replace the motor with 1-phase version but with the prices of dust collectors these days thats probably not economical.
A static phase converter will only help start a 3-phase motor. 3-phase motors start without a capacitor because they can produce more starting torque than 1-phase. You could do this same thing by jump starting the motor with another motor to get it spinning. Once the motor is spinning it runs on 1-phase and produces less hp and more heat.
A rotory phase converter will actually produce a 3rd sin wave so the motor will start on its own and run at ~90% of its rated hp. In order for any of this to work the 3-phase motor has to be tapped for 208-230 wiring.
A rotary phase converter wouldn't be a bad purchase considering the generally lower cost and higher availability of used 3-phase equipment. Just remember to buy a converter with more hp than you will ever need to run at the same time. If you don't want to buy one, you can build one with another 3-phase motor. If you don't care so much about efficiency you can skip all the fine tuning and the purchase of the large capacitors and just wire the motors together.
-------------------- ---------------------
220V 1-phase phase conv --------------------- weak 3-phase 220 motor -------------------- ---------------------
I can't remember all the wire numbering off the top of my head but you can google for that.
Marc

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