[simpits-tech] Need a power supply...
David C. Allen
david at allen1.net
Fri Apr 4 17:50:35 PDT 2014
At 05:07 PM 4/4/2014 -0700, you wrote:
>On Fri, 4 Apr 2014, David C. Allen wrote:
>
> >> Again, the *output* has to be single phase. OUT-PUT. :)
> >
> > I know Single Phase input VFD with a single phase OUT-PUT are not
> > rare, just more $$$ They use them in the HVAC industry for blower
> > motor speed controllers.
> >
> > If you use 3 phase output just connect THREE 110vac to 28vac
> > transformers to the OUT-PUT and you are done. Now you have 3 single
> > phase outputs! ! ! ! Looking for a fish, where are they when you
> need one.!!!
> >
>Two people separated by a common language. :)
Now you are thinking outside the box!
>I don't need 28vac though, only 110/115. :)
OK, use a 110vac to 110vac isolation transformer.
>So you're saying that using a single leg + neutral from a 3 phase VFD
>would work?
You would want to load all three phases because they were designed to
run a motor
But it would be best to talk to a VFD vendors tech support.
I have a VFD004S21A VFD that I can send you if you want to play
around with one.
220 single phase in and 3 phase 220vac out.
I don't have a 110 volt version.
>g.
>
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