Some things seem to get harder to find as time goes on.  Things like this
used to be done all the time, probably from paper nomographs that never got
enwebified.


I have a solenoid coil that I'd like to re-wind from 120V to 12V.
The complication is that I need to keep the amp-turns and the inductance to
similar values.

The original is 70 ohms, 19 layers of 176 turns or 3344 turns.  I wasn't
able to measure the inductance due to high series resistance.

Seems like this should be possible, and yet I've found precious little in
data on how to rewind for different voltages.

I tried re-winding for amp-turns and had limited success, but the output
energy was very limited.

The device in question is a BD-10AS from ElectroTechnic products.
The magnetic field of the solenoid opens a switch which is integral to the
function, and so I need about the same level of flux.  I am theorizing that
the reason for low output was the lower inductance of my 400 turns of #19
vs

I need to use it far from an outlet, and powering it with an inverter is
almost certainly going to result in a smoked inverter. I thought of a
series pack but the idea of a battery at 120V with any real output current
is pretty scary.
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.