Re: Saturable Reactors

Yes, anyone have any basic designs? It would seem the best of all worlds:
to be able to vary your current *and* your voltage (with variac, of
course). I understand the principles, but how would one make it for
yourself? I have several E cores that i am (very slowwly) planing on using
(prepping) for use as current liming cores...


David Trimmell

At 05:05 PM 9/16/99 , you wrote:
>Original Poster: "Ken Donnell" <bigken-at-a.crl-dot-com> 
>Hi, Eric
>Can you point me to where these little beauties could be found (hopefully
>used or surplus)? Have you run across any literature on building one?
>Ken Donnell
>> From: Tesla List <tesla-at-pupman-dot-com>
>> To: tesla-at-pupman-dot-com
>> Subject: Saturable Reactors
>> Date: Wednesday, September 15, 1999 10:44 AM
>> Original Poster: "Eric Davidson" <edavidson-at-icva.gov> 
>> To All,
>> Just thought I would toss in my $0.02 into the reactive/resistive
>> fray.  IMHO the most primo way to control a "pole pig" is with a
>> reactor.  The reactance is infinitely variable from min to max and
>> only a small DC power supply for operation (0-100 volts maybe 0.5 amp). 
>> saturable reactor is not nearly as big as an arc welder, and doesn't
>> hundreds (or more) watts like several Calrod electric stove elements in
>> parallel.  The reactor I have is about the size of a loaf of bread,
>> about 30 lbs.  Its rated at 20 amperes, with taps for both 240 and 208
>> operation.  The large core gives it huge thermal hysteresis and can be
>> in oil for even more cooling if desired, I have controlled 40 amps with
>> problems.   Another perc of using a saturable reactor is the control
>winding is
>> isolated from the circuit it controls.  The SR can be placed right next
>to the
>> pole pig and only a small  lead is used for control from a safe distance.
> Hope
>> this helps.  Stay safe.
>> Eric
>> <mailto:edavidson-at-icva.gov>edavidson-at-icva.gov