single phase variable speed?

C

crank78

Joined
Dec 21, 2013
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I see it posted that you have to have 3 phase motor to have vs. I wonder what is on my cue lathe. Its 110 which i believe is single phase. It is vs from wide open to stop with reverse. No im not tearing up a 5k lathe to use for a grinder motor. I just wonder what im missing. I would like vs but only have 110 in my shop.

is it that you just cant get enough hp out of 110. looked at my lathe its only 1/3 hp. also says Motor size: 1/3 HP; 90 volt DC
Power Req.: 115 Vac/60 hz.
Speed: Variable 0-3200 RPM
 
Last edited:
You answered your own question. The motor is a DC motor. It has a converter to produce DC from 110 AC. This powers the motor which is controlled by a DC speed controller. You can get larger DC motors and do the same thing with the right electronics. 1 hp is about the tops of 110V, though I may have seen 1.5 hp on 110V. Two hp or more requires 220V.

If you want to use an AC motor for variable speed, you either need a variable frequency drive with a 3-phase motor or a single phase motors with step pulleys.

--nathan
 
Ty for the response. After reading your reply and researching some more. I understand completely now.
 
No problem. It took a good while to get my head around it when I first looked into it all. Electrical is NOT my strong suit. :D

--nathan
 
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