Exactly my point the inductance will in fact have changed because a loop was added which changes the magnetic field to current ratio lowering the original current flow.
With a moving brush the inductance changes with each side of the brush either adding or subtracting winding's that are magnetically linking to the circuit which changes the magnetic flux to current ratio.
with a steady current applied to a circuit with changing loops count that magnetically link to the circuit you will in fact change the current flow from the increase or decrease in magnetic flux to current ratio.
I have even had a Physics major and an electrical engineer Pm me and tell me i was spot on so i can care less who disagrees with me.
my own bench does not lie and yours wouldn't either if you did some tests.

regards,
Marathonman

MarathonMan is spot on.

EMF = d(flux)/dt = d(L*I)/dt which only simplifies to L*dI/dt in case L is constant (and this last simplification is the only thing we are taught in school).

Adding or subtracting windings to an inductor changes L itself and thus L*dI/dt no longer applies. Instead d(L*I)/dt should be used. And with that it is very simple to obtain an overunity system as long as the amount of energy that it costs to change L is less than the amount of excess energy you obtain with the system.

The more difficult part of this is to design a system that will do exactly this and which can be built in practice. The Figuera device is such a device.

PmgR
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Massive thanks PMGR
even though i knew i was right all along and they were in fact the one's that were wrong.
Regards,
Marathonman

Exactly and well put pmgr, the amount of power used to turn the motor for the brush rotation is quite small plus the losses from the switching of the magnetic field to the electric is quite obvious very efficient so all that is required from the secondary is the replacements of the losses which is small, the motor operation and the amplification to the rising primaries.
the power draw of the primaries is reduced to that of the IR2 losses when to full potential and the reducing side offsets the rising side voltage drop so the secondary is there to replace losses and to give amplification to the rising primaries.

Thanks for being here, one with a brain that uses it i might add.
regards,
Marathonman

That is basically the initial problem that everyone has been taught that in order for self Inductance to take place there has to be a current change which changes the intensity of the magnetic field induced within the circuit it's self that opposes the original current flow.

in order for self induction to take place withing the circuit something has to cause the magnetic field to change in intensity either up or down. with AC it is the steady current rise and fall that produces this change in magnetic field that opposes the original current flow. it is this and only this that is taught in every school and university around the world.

In a DC circuit it will still be the same, something has to change in order to change the magnetic field intensity. since the current is steadily applied to the circuit how are you to get the magnetic field to change on a continuous basis. ?

This is what is NOT taught in any schools;
you change the circuit it's self,  by adding loops to the circuit you are in fact changing the magnetic field intensity from the magnetic linkage of the added loops to the circuit. with the added linkage you are in fact changing the intensity of the magnetic field which is the magnetic flux to current ratio.
when you change the magnetic flux to current ratio you are in fact changing the opposition of current flow it's self which is produced within the circuit known as the Lenz Law. any EMF generated in the circuit under these circumstances  will be induced in a direction that opposes the original current flow.
this exactly follows the induction Laws set forth by Faraday himself and Lens thus does not violate not one Law.

L=(L*I)/dt self induction changing over time.

Welcome to Figuera inductance 101.

Regards,
Marathonman