Split Flux Transformer

[seaad]

hi seaad, so its gone from 88% to 99% just by tightening the winding on the core?    are the cores tightly clamped?
thanks
np

"by tightening the winding on the core"
No, I took my 'normal' 100 turns test coils [ bicycle tire look alike ]  and twisted them so I got 200 turns from them.
I haven't checked any tightening effect at all. Of course can that improve things here a bit but I know from experience from my earlier tests by raising the amount of turns to 200 turns, gives a much greater impact. And I was lazy too.   It would mean that I had to wind Four new coils.     Huuh 

I know that the distance between a primary physically at a more perifere position from the secondary coil can affect the result both positively and negatively in different situations
as I found in my Figuera experiments for instance.

"are the cores tightly clamped?"
Thats really a relevant question.
By using the top U cores as I-beams they creates a shorter magnetic path. But instead the back side of the U-cores is not as smooth as the rounded  top edges that fits exactly to each other. So yes,  here will be tiny gaps. And these first tests where only to find  some "potential".
More testing can certainly show the differences and improve the result because we can feel the smell of OU behind the 100 %.
For instance to put the primarys at the four central "legs" beneath the secondary winding instead ??
And go up in frequency . . . . . .

"clamped" = No / Yes  Gravity clamped 

Regars Arne

[nul-points]

ah ok, thanks Arne


yes, maybe i should have said 'closely', rather than 'tightly' for the windings, but it seems to be a positive move when you're ready to settle on a config


the core clamping possibly more important in a 'final' design - since the ferrite cores already have a default 'gap' due to the distributed mix inside the core


...when i look at that particular design i feel that there ought to be a propellor on the top of each leg   


all the best
np

[seaad]

Hi, Have now made more tests with the "Main Principle Transformer".
200 turns in all windings and different loads tested plus a bit reconfigurated cores.
At 10 kHz I got my best value around 99,5%.
This transformer falls into the category multi input primarys and givs a high performance as
my earier test in post #55  pos 3) did.

Arne

[norman6538]

Arnie where is the  Jack Hildebrandt  motor information.
Google gave me nothing.

Norman

[lancaIV]

Arnie where is the  Jack Hildebrandt  motor information.
Google gave me nothing.

Norman

https://peswiki.com/directory:hilden-brand-electromagnet-motor