Thane Heins BI-TOROID TRANSFORMER

[teslaalset]

Guys,

Would it be possible to emulate / simulate Thane's effect using this type of core.

I am uncertain how secondary windings 1 and 2 are connected to load.

Any help greatly appreciated, for I would love to re - create this effect.

Regards, Penno

Penno,

One can tell already by looking at this core, that this one will not succeed in getting the right effect.
The primary core needs to have a higher reluctance (= flux resistance) than the secondary cores.
Higher reluctance can be obtained by saturation in this particular core.
But then it will block the flux generated by one secondary coils going to the other secondary coil.

Sorry, but not really worth the effort to simulate. This one will simply not work.

[broli]

Penno,

One can tell already by looking at this core, that this one will not succeed in getting the right effect.
The primary core needs to have a higher reluctance (= flux resistance) than the secondary cores.
Higher reluctance can be obtained by saturation in this particular core.
But then it will block the flux generated by one secondary coils going to the other secondary coil.

Sorry, but not really worth the effort to simulate. This one will simply not work.

Something more interesting happens when you add a gap in the big toroidal core. This time however it can completely neutralize the field of the primary, so PF = 0. BUT the primary is putting in 10 amps with 10 turns, while the secondary (the toroidal coil around the gapped toroidal core) needs 63amps at 10 turns to completely neutralize the primary. What does it mean?

[teslaalset]

1) kind of, see 3)
2) yes
3) no load is basically the case you describe in your first question. In the sim that toroid is really a core 1000 perm. with 0 Amps current. With On load I change the current value to say 10amps to simulate induction action. As the toroidal coil would want to oppose the field of the primary.

Broli,

This seems a difficult one in Femm.
Below my interpretation, but it will not run, because Femm does not allow the touching of two circles. It such case it can not build up a mesh network of points where it calculates the flux.

Would a similar setup with 2 rectangular cores work?

[SchubertReijiMaigo]

@ teslaalset. saturation core is to obtain a higher relucatnce in the primary core, the air gap do the same thing, but when you saturate a path you draw more current in the primary that's what on conventional transformer we use Boucherot formula to avoid saturation, and very very small air gap add linearity and amplify Heins effect (the magnetic diode) without increasing substantialy the current (you can wind more turn to avoid this). Saturation is not whole the time because we have sinusoidal signal... I have read Thane's document the primary can work with high Z or high R and saturated. The high Z mode is like conventional primary (not saturated) the high R mode is heavely sataurated but the current is limited by the R of the very small wire. So the BTT can have several configuration, I think the gapped version is more stable with heavy load, or varying load like motor...

[teslaalset]

@ teslaalset. saturation core is to obtain a highter relucatnce in the primary core, the air gap do the same thing, but when you saturate a path you draw more current in the primary that's what on conventional transformer we use Boucherot formula to avoid saturation, an very very small air gap add linearity and amplify Heins effect (the mahn,etic diode) without incresing fdera

SchubertReijiMaigo,

My understanding, with all respect:
Introducing a gap in a core shifts the point of saturation to higher current values.
Applying this in the BITT means that a larger part of the sinus of the primary AC current has no saturation, leading to higher losses due to more counter EMF in the primary coil. I still don't understand your point, sorry.