RE: Saturable Reactors as Ballast

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Carl Litton" <Carl_Litton@xxxxxxxxxx>

Thanks, Finn.  What is 'u' in your equation - the input voltage?

Carl Litton


-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Saturday, December 24, 2005 10:37 AM
To: tesla@xxxxxxxxxx
Subject: Re: Saturable Reactors as Ballast

Original poster: Finn Hammer <f-h@xxxx>



Tesla list wrote:

>Original poster: "Mike" <induction@xxxxxxxxxxx>
>
>Hi Carl,

Snip


>Next week or two, if I can cut loose from other stuff at work, I
>will try and use the LRC meter to get you some L values on the AC
>windings as well as the control windings.
>Mike

Mike,

Pls. notice that few LCR meters can supply enough current to produce
a usefull measurement on iron cored inductors. By exciting the
windings with a typical LCR meter, the iron will be operating in the
low "initial permeability" area of the B-H curve, and the readings
will turn out to be too small.

Instead, you should connect the windings across a variac, with a
Ammeter in series, and calculate inductance according to:
u = wLi

W = Omega = 2*pi*frequency = 2 * 3.14 * 60 = 377

Cheers, Finn Hammer