Pierre's 170W in 1600W out Looped Very impressive Build continued & moderated

[listener192]

Attached are scope shots showing rotor output for he 2 overlapped coils @25V DC input.

This output is only 20% of the full set of energised coils however, it is lighting the 25W bulb.
Addition of the second coil set with the output loaded, the output voltage  increases from 86V to 122V.

L192

[pmgr]

I think this statement from pmgr in the Figuera message thread may be relevant here also:
"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"

Let me explain this a bit further. You need to a way to vary the inductance as a function of time such that

1. the energy required to vary the inductance is less than the energy you will get from the overunity system. Or in other words, how much energy does it cost you to vary the inductance?

2. you vary the inductance on a continuous time-basis. That means there can be no discontinuities in the current in/voltage over the inductor

There are a few ways to change inductance as a function of time that everyone can think of, but unfortunately, they don't comply with the above two conditions, either the energy expended is the same or more than the energy the overunity system produces, or the current/voltage doesn't change on a continuous time-basis.

Feel free to post your ideas!


PmgR

[cheors]

Vary the power supply ?

[konehead]

Hi Pmrg
To radically change inductance as well as creating hyper ringing situation to the inductor, (which fills caps X20 or X 50 higher in voltage) short circuit the inductor's  in and out leads together just for short blip during peak voltage period.
Run through fwbr and dc into cap.
Unload cap by itself to load.
Use slow mechanical relays that are slowly burning up and sticking closed!  (haha Pierre's method)
Seriously must be very low ohm AC capable switching
Brush-commutator switching probably ideal or else if solid state, clusters of parralled mosfets connected bidirectionally also fast diode from soure to drain on each cluster to sustain ringing during switch closure period.

[listener192]

I decide to model my rotor/stator in FEMM to determine why the rotor coil output collapses under load.
The first thing was to trim the rotor down to 5 poles. The coil pitch is still 5 slots, required to fit the 30 slot stator.
You may see that the 6 slot pitch of a 36 slot stator would have better linkage with a 5 pole wide rotor, with 5 coils overlapping.


I tried reducing the rotor width to 4 poles, but this resulted in a lower output, so 5 pole rotor width was the best compromise, this only has 4 coils overlapping so output will always be lower than the 36 slot  scheme.I had been running a two stator pole scheme, with 10 coils either side on at any time.With the simulation I could see that switching more than 8 coils either side would be a waste of energy.Coil  input was 5A (each).


A load was simulated with -1A of counter flux applied to the 1370T rotor coil, the first picture shows the result of that.

The stator flux from the outer most coils wants to close through their teeth.
The next picture shows the situation if I increased the coil current to 10A. Rotor flux increase to 1.1T close to the 1.15T value with coils @5A (no rotor load).
The next picture shows 5A through the coils but with the addition of a 5A bias coil on the rotor. This coil can be split and wrapped slot to outside of stator (in line with flux) however, it is convenient to have the coil on the rotor.
The polarity of this coil needs to change when the poles reverse. Flux level is about 0.9 T.So this coil makes a large difference for a much smaller energy input.  The issue is coupling the flux into the rotor, so just doubling A/T via the coil set does not increase the rotor flux above 1.2T, as the linkage is still the same and a large portion of input is wasted as heat.
The bias coil ensures the stator flux closes around the stator and through the rotor, where it can do useful work. 
So the bias coil makes a 0.7T step with the step switched coils adding the a sine component on top up to 1.15. As there is an un-energized gap between the two poles, the end result will average to a sine.
Until I try this out I am not sure what output into a load will be seen.

The bias coil only switches every half sine.




L192