On 13 Jun 2005 12:39:44 -0700 wrote:

I need to find a transformer (converter?) that will allow me to
upconvert from 12VAC to 24VAC in order to drive a small motorized
device (50 watts) for continuous duty. I tried using a 110V/220V
'travel' transformer -- it gave me the correct voltage but not enough
output wattage (probably not enough turns on the windings).

The 110/220 transformer had more than enough turns, they were just
wound with wire that was too small for the current that you require.

You could try to find a similar 110/220 transformer with more current
capacity, but this would be big.

An alternative would be to pick up a transformer with 2 12V
secondaries. Ignore the primaries and put the secondaries in series.
Then you apply your 12V between one end and the "center tap" and you
get 24V between the 2 ends, assuming you have the phasing right.

The 2 12V secondaries have to be rated for the current you plan to
draw.

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Jim Adney
Madison, WI 53711 USA
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