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Tool Talk Discussion Board

Re: Re: reducing speed of an electric motor


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Posted by Mark Kw on August 30, 2002 at 07:08:26 from (216.222.236.41):

In Reply to: Re: reducing speed of an electric motor posted by Cliff (VA) on August 29, 2002 at 18:25:50:

There are a number of small AC variable speed drives available for fractional horsepower motors. These range from voltage reducers to variable frequency controllers. Voltage reducers are dangerous if used on a motor that is not designed for use with one. VFD's (variable frequency drives) can usually be used on any AC motor but you check with the mfg of both the drive and motor to ensure safe operation. Prices on these can range from around $50 and up depending on size / type. I've seen some smaller ones in use on different things but have no personal experience with them so I will not even consider suggesting a brand or type. I have worked with some Reliant and GE heavy indsutrial VFD drives but these are the ones that start around $4,000. DC drives and compatible motors can also get into some serious bucks too.

Do a search for "VFD drives" and go from there.


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