Quote:
Originally Posted by Oak
I'm in the planning stages of building a new shop and I talked to my electrical company about 3 phase power. They said they could run it but I would need to pay around $1500 for the initial install and there would be an additional service charge every month to have it. I didn't check how much the monthly fee is yet because I'm not sure if it is worth paying the added fee upfront. They said there would be no charge to run a single phase service but I need to run the pipe with a pull string.
We use a lot of VFD's at work and the cost has come down so much on them that they are like TV's now. When they fail you toss them out and replace with new. I'm not sure how well they would work on a air compressor unless you wanted it for a soft start. I think for a lathe or similar it would work well + you can single phase a vfd to get 3 phase but you need to derate it around 40%.
I worked at Emglo back in the 80's and they build a fine compressor. They are Jenny now.
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Your right Todd, my Logan lathe was powered by a 3 phases 1hp 550V, I swap a 3 phases 230V 1.5hp Teco motor powered by a Teco FM50 2hp rated VFD to compensate for the loss of power.
To power a compressor or welder you need a rotophase (Rotary phase converter), They are easy to build but pretty noisy, you constantly ear that 3 phases motor spinning all day long so you need it has far from your working space as possible.