Re: Current

Jerry W. Decker ( (no email) )
Mon, 25 Jan 1999 21:07:26 -0600

Hi Mike et al!

Did I miss something?

You wrote;
> sounds as though your formulae are missing the vital element,
> work done (or Watts) = Volts * Amps, If you have 1A @ 12V, and you
> step that up to 12000V, you will have available .001A.

I didn't see any posts that talked about Power (Watts), all I saw was a
request on how to STEP DOWN 1000 VAC @ 12 cps (cycles per second) to
something that could drive an inverter.

Every inverter I've ever seen (and I work with them EVERYDAY) uses 12vdc
to produce 120VAC @ 60 cps, at various power ratings, ranging from
130Watts up to 960Watts.

So I am puzzled where this formulae business came in, which by the way
isn't technically correct either since voltage X amps = watts isn't
exact due to the nature of the waveform. For instance a stepped
sinewave will give you a radically lower Watts rating than a pure
sinewave.

Anyway, I went through the posts on the Current question and found
nothing mentioning power, so was wondering where this came from...that
includes the comments about high voltage and insulation levels...even in
Davids original question, all he asked was how best to REDUCE this to
practical levels....wondering in Dallas...<g>...

--            Jerry Wayne Decker  /   jdecker@keelynet.com         http://keelynet.com   /  "From an Art to a Science"      Voice : (214) 324-8741   /   FAX :  (214) 324-3501   KeelyNet - PO BOX 870716 - Mesquite - Republic of Texas - 75187