Inductive Steel Core

[Jim Mac]

Small experiment..  Could we create a core that also induces?  And what are the ramifications?

In this video, I take a small amount of 1/4" steel wire rope that is insulated and wrap it through a copper coil.  Apply 100 Hz AC to the copper coil and measure the steel core output.

A steel core will certainly induce.  And surprisingly this experiment did not cause the input to raise when shorting the steel coil core.

I am wondering what configurations this may be used for, perhaps pulse a motor from the steel coil?  It certainly exhibits a nice large magnetic field coming from the steel.

     

[Jim Mac]

Update:


Just did a quick test with a secondary ..  Here is what I am seeing..

Secondary shorted through ammeter  / Core Open = 1.5 amps in secondary
Secondary shorted through ammeter / Core Shorted = 1.5 amps in secondary

(secondary produces the same regardless if core is open or shorted)..

Core shorted through ammeter / secondary Open=  0.3 amps in core steel
Core shorted through ammeter / secondary Shorted=  0.18 amps in core steel

(core steel loses roughly 1/2 when shorting the secondary)

From initial tests posted above, seems core currents have no effect on the normal secondary. And taking those "core-currents" does not affect the input power. but the normal secondary does diminish the core currents in standard configuration.

When I think about it, All I am doing is measuring the amperage through the shorted core. Those "core currents" have to be there with any core.  All cores are internally conductive and short-circuited.  There should logically be no difference in performance if we take those currents or not. As far as eddy currents, if we use thin wire like the size of laminations, the individual wire loops should work similar to laminations reducing eddy's.

Of course I am making no claims, but I wonder if we make a super efficient core with thin iron wire, perhaps these core currents would be enough to put us over the edge of the OU boundary.

[Jim Mac]

I have more iron wire on order, but I dug up what I have to do another test..

I just wrapped a coil inside to out all around then switched directions and wrapped the outside.  Trying to grab as much flux as I can with what I have..

The iron wire is absorbing 200+ milliamps and the source does not go up when shorting.  

[Jim Mac]

[Jim Mac]

Making progress in understanding interactions or iron wire inductor.

The material magnetizes 1 polarity and the induction magnetizes in opposite polarity.