OK I did some tests and it seems to me that the resulting wave from on the secondary is not right when I use two sets of DC lumps (fully rectified AC) 90 degrees out of phase.

Then when I think of the resistor array and then I realize that the resistor array setup would make two DC lumps 180 degree out of phase which makes more sense. I have to say it is confusing to me.

Did the people that made the step drivers use two steps 180 out of phase ? I don't see why I can't just use an inverter circuit. I think the resistor array takes each magnet from minimum to maximum to minimum one after the other. Just like a normal inverter, but with the two primaries on separate cores with gaps. The way it is drawn is quite confusing (at least to me).

To me that means if there is an effect, the effect must be in the gaps or the arrangement.

I'm going to try using a regular inverter circuit and a DC square wave to each coil 180 out of phase just to see what happens. 

Cheers

Impedance equation:  Calculated from resistance (R) and reactance (XL - XC) )

Farmhand, do you have a picture of your coil set? I am not sure if I imagine this right.


Again, I think doing this in plain 0 to +n DC may be a problem. Then again, after all it's the voltage diffrence between low and high, that matters, one would think. As I wrote, I did DC tests, but my alternating p1/p2 pulses did not overlap as in the 90 deg situation. Results were unspectacular in that 2 primaries caused double output as one primary did, and not a lot, compared to using AC from the same 12 v supply (voltage drop due to rectifier given). In the lagged ac setup 2 primaries caused three or more times the output of one primary. As a quick test I would really suggest to simply use the unrectified ac out of a supply, feed it directly into the primaries (suggested 15 to 20 ohms each), with one of them having a big cap in series. It may he a bit tricky to find the right capacitance, it must also work well and quickly, not all caps are perfect.


180° is not really what figuera described, when AC is the input. When it's DC then yes, but you have a congruent Front here, with two same forces, opposing eachother, this doesn't sound too promising, does it? In the AC setup Figueras decription results in a 25% lag that sounds much more like a tail-chasing dog, an afterburner to me. As I  said, I do have the practical evidence, that this 90°  AC setup does not simply add the output of the two primaries together, compared to when they run alone...


BTW.  I have seen on ebay there are some ex-soviet sellers of "ferrite bars" and "ferrite rods", up to 12mm diameter and 200mm lenght, these would assemble a great core and they are cheap. Imagine 3 Rods, eg. 12mm diameter, 100m lenght as the cores (thanks to the round shape the wire will remain reusable), with two bars, like 120x20x4mm as the floor and the roof of the 3 columns, building a double E Core, or a [|] core. This would also allow to test air gaps.


I also saw metglass cores for MEGs (C cores), but I'm not sure if they can handle a T-fluxgate (where the secondary core is sandwiched).
Spontanously I decided to crack and sacrifice my micro wave oven supply, it has a nice secondary with 150 ohms that will give me two or more fantastic primaries, and the sheet core is CI shape if I'm not mistaken, so that could be used too.  This whole magnet wire addiction must look rather strange to "normal" people.  BTW I miss a mad scientist smiley 


Regards.

@Farmhand or Gyula (better both)

I made a commutator using two commutators from a DC motor 8 poles, 2 brushes each (see schematic)
with the idea of feeding the pos impulse at both inductors alternatively. (kind of flip-flop), not a
sweet transition, but neither a sharp one as the brush contact area is thinner that the comm segment.
(note that they are twisted; That is: when A is in direct contact, B is contact through-resistance)
Also note that there is never a 0 voltage situation.

my question is: in theory will the resulting wave in the two primary be 90 or 180 out of phase ? . . .or
will it be any out of phase at all ?

your opinion greatly appreciated

You didn't ask me, but your drawing looks more like a 45 degree shift to me.