Thane Heins Perepiteia.

[Steven Dufresne]

Photos attached from February 11, 2008 demonstration given by Thane Heins at the University of Ottawa. I didn't take a lot of photos since everything that was there was the same as in the demonstration videos available online.
-Steve
http://rimstar.og

[LarryC]

Hi All,

Please note the following statement from the news article:

'Heins adds that he and his colleagues ?have coupling from the primary to the secondary. The reluctance flux path in the secondary is lower because either the secondary core area is greater or because we employ core material with a higher relative permeability which results in a decrease in reluctance. When the secondary reluctance is lower - back EMF induced flux from secondary coil 1 must follow the path of least reluctance into secondary 2 and not back to the primary. The primary operates only at magnetizing current levels (reactive current only) and does not draw any non-reactive current from the source. The law of conservation of energy for a transformer requires secondary back EMF to be able to mutually couple back to the primary - but if this flux path is higher it will not be able to do so.?

In order for the back EMF induced flux in core 1 to follow the path of least reluctance into core 2, the cores must be in direct contact at the center point. Each core may be a half circle at the point of contact. Please note that the drawing in the article shows that if the circles were extended they would overlap.

If there is any spacing between the two cores caused by the coating, etc, the induced flux in core 1 will not jump to core 2 as the air gap will not be the least reluctance path. You would only get the induced flux causes by the  current in the center wire wrapping. This may be why when Groundloop switched cores the results were the same. Also, the two cores must be closer than two cores just touching as they would easily saturate at the point of contact. Half of each core at the point of contact would best help the flux switching to the second core.


Regards, LarryC

[Groundloop]

Steven,

Thank you for providing the information and images.

If the "o/u" transformer is only 100% effective (or less) then I see no need to continue reaserach on my replica.
Same old story, we are not quite there yet.

@LarryC,

Thank you for the information.

Groundloop.

[Steven Dufresne]

LarryC,
If the cores were ground down flat to about half their thickness, not their diameter but the thickness of the ring material, and then joined would that do?
-Steve
http://rimstar.org

[argona369]

@argona369 and @abassign,

An saturable reactor uses a DC current to switch a larger AC current.
My replica device uses no DC current to switch the output on or off.

The difference is that my circuit use NO power to do the switching.
So I do NOT agree that my replica circuit is an saturable reactor.

Groundloop.

your right i think,a second look and it is a bit different than a mag amp.
there are different configurations of mag amps but i don't think this is one of them
as all the power transfers through the control winding.
interesting idea to chop the control to stop feedback btw.