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Re: DC Charge inductor.



Original poster: "Gerry Reynolds" <gerrytesla@xxxxxxx>

Hi Dave,

A little caution, I think, is in order. The impedance of an inductor that limits 120Vac to 6.6 amps is not 18 ohms "resistance" but is 18 ohms which is a combination of its resistance and reactance (most of it is probably reactance). If you pass a DC current thru the inductor and measure the Vdc drop, I think you will find the resistance to be much less than 18 ohms.

Gerry R.
Original poster: <mailto:Davetracer@xxxxxxx>Davetracer@xxxxxxx

In a message dated 5/22/2005 10:48:41 P.M. Mountain Daylight Time,
<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx writes:
Original poster: "Jim Mora" <<mailto:jmora@xxxxxxxxxxx>jmora@xxxxxxxxxxx>

Hello all,

I am going to build an 18 to 40 Henry choke (multi-taped) DC charge inductor
<continued discussions>.


Jim, I more or less fumbled my way to an 18 Henry inductor by winding about 20 pounds of #11 copper wire (with the heavy magnet-wire type of insulation) on a simple coil mold, then putting a removable core inside, made by hack sawing apart a transformer. Believe me, after all these years of "MicroHenry" and such, it got a little weird working in "Henries".

     I used  E
               -----
                IR

     to calculate R since I knew E and measured I. At 120VAC, 6.6 amps were
struggling through the coil, which works out to 18 ohms "resistance".