Jeffrey Angus wrote:
On 10/16/2011 11:11 PM, Jeff Liebermann wrote:

Ok, that's not going to work. Most of the impedance is coming from
the DC resistance of the wire. Decreasing the gauge decreases this
resistance, but also decreases the number of turns that will fit on a
the spool to a maximum OD of 1.5". This isn't working. I give up for
tonite.


Well as long as your bitching at me for leaving something out....

The original coil is being fed through a bridge rectifier (mentioned
elsewhere in the thread). So the AC impedance is less of an issue.

Using the proline scripting, I came up with 80 mH using #28 AWG wire,
1988 turns and 1.54" outside diameter with 42.63 ohms.

I come up with 11192 ampere turns. I've got some wiggle room to
increase the bobbin size a bit. So rest well good sir, we are at
a point that is "close enough" to wind up a prototype and see if
works properly.

If it does, then it gets potted in Epoxy to match the original
physical dimensions and we call it a success.

Jeff-1.0

You know, at this point, you pretty much don't care I would assume how
ever, have you thought about constructing a voltage double rectifier
instead of that bridge rectifier to drive that coil?





+-------+-------++
| | |
+ | |
D1 - | |
^ | |
| | +
C1 + + C|
240 AC in | --- C| 480 Solenoid
|| | ---C2 C|
+---+-||+------+ + |
|| + | +
| | |
- | |
D2 ^ | |
240 AC in + | |
| + |
+-------------+-------++-------+
(created by AACircuit v1.28.6 beta 04/19/05 www.tech-chat.de)


I suppose if you had to motor caps around you could use those, the
large ones of course.

What ever.
Jamie