The Static Bedini Device

[captainSensible]

I imagine you'd want to start with a small or moderate sized core to begin with, instead of going out and buying the largest one you can find..
The goal is to saturate the core so that means lots of Amp-turns to generate the flux. Thus the switching device (probably a mosfet) must handle the large peak currents.

More turns, less amps required and vice versa.
A smaller inductor and/or operation at higher voltage will allow higher frequency operation, the advantage being less turns of wire required.
Higher voltage will give a faster current rise time (i/t = V/L)

Its essential to have a decent capacitor across the power supply to provide the peak current. By decent that doesn't necesarily mean large (although it would for low frequencies), but just something with a low ESR that can supply the current and a good quality dielectric such as power film capacitor.

I'm guessing a 1:1 ratio would be best for the transformers otherwise you could end up with too high a voltage on one side. E.g. if mains transformer say 240 to 12V the ratio is 20:1 so if the load volts is on the low side and reaches e.g 50V then the saturation side will reach 20 times that which will cause breakdown.! Alternatively using the low voltage side as saturation side will still cause high volts at the load side due to needing a load resistance much greater than winding resistance, meaning again it could cause breakdown.

Standard mains transformers are not designed to operate in saturation so I think you're always going to have a problem with them over-volting or wasting too much power when you try to saturate them in this type of circuit. (But they work fine as saturable reactors because the load limits the max current/power)

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And of course a saturable reactor is operating with steady-state sinusoidal signals whereas here we are using 'switched mode' type of operation

[sparky2026]

Hi Sparky. Excellent thread by the way.

THANKS I WANT ALL PEOPLE GET A WORKING DEVICE AT LOW COST AND SINGLE FOR UNDERSTANDING AND BUILD BUILD IT

A question on how to get this circuit to work.

Should the saturating coils be energized prior to applying current to the charging inductor the other side, or simultaneously?

FIRST BOTH COILS MUST BE WITH CURRENT. FIRST COIL GET ENERGY FROM THE POWER SOURCE AND POWER THELOAD IS THE RESISTANCE OF THAT COIL, HEAT THE COIL
 THE SECOND COIL IS POWER ON FOR SATURATE THE FIRST COIL AND GET MINIMAL INDUCTANCE

If they are energized first then they will act like normal inductors and take time to charge. Will the energy stored during this charge phase aid or hinder the energy stored when the other side is energized?

THE CHARGE FASE IS ONLY FOR GET THE MINIMAL ENERGY AS POSSIBLE FROM THE POWER SOURCE

This arrangement of transformers is a classic saturable reactor - used for controlling high power AC loads with a low power DC current.

YES IS A MAGNETIC AMPLIFIER, BUT IN THAT APPLICATIONS THE INDUCTANCE CHANGE IS NOT USED FOR ENERGY GENERATION ONLY IS USED AS VARIABLE SERIES IMPEDANCE FOR POWER CONTROL

I have built and used these before but never thought of exploiting the variable inductance aspect for energy gain.

Did a quick mock-up test circuit but couldn't see overunity. This could be due to the transformer's resistance.
I used standard mains transformers but maybe a custom wound ferrite ring may be better - get higher inductance per turn hence less resistance.

THE MORE SINGLE DESIGN IS USING READY MADE TRANSFORMERS IN MARKET FOR GET TOO MUCH KILOWATTS OUTPUT. FERRITE IS FOR HIGH FREQUENCY DESIGN FOR GET LITTLE AND LIGHT DEVICES

Ideally you want a load resistance many times higher than the transformer winding resistance so that as current flows most of the power ends up in the external load.
Alternatively discharge it into a capacitor that is at high voltage and this will achieve a similar effect.

VARIABLE INDUCTANCE IS A COMMON FREE ENERGY FACT, A SINGLE COIL DECREASES ITS INDUCTANCE WITH CURRENT AND THE BACK EMF GET THAT OVERUNITY

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My gut feeling is that if you can't achieve OU from a single transformer then you will not achieve it with two transformers wired together. This is from a purely logical point of view - but I'm happy to be wrong about this!

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I imagine you'd want to start with a small or moderate sized core to begin with, instead of going out and buying the largest one you can find..
The goal is to saturate the core so that means lots of Amp-turns to generate the flux. Thus the switching device (probably a mosfet) must handle the large peak currents.

More turns, less amps required and vice versa.
A smaller inductor and/or operation at higher voltage will allow higher frequency operation, the advantage being less turns of wire required.
Higher voltage will give a faster current rise time (i/t = V/L)

Its essential to have a decent capacitor across the power supply to provide the peak current. By decent that doesn't necesarily mean large (although it would for low frequencies), but just something with a low ESR that can supply the current and a good quality dielectric such as power film capacitor.

I'm guessing a 1:1 ratio would be best for the transformers otherwise you could end up with too high a voltage on one side. E.g. if mains transformer say 240 to 12V the ratio is 20:1 so if the load volts is on the low side and reaches e.g 50V then the saturation side will reach 20 times that which will cause breakdown.! Alternatively using the low voltage side as saturation side will still cause high volts at the load side due to needing a load resistance much greater than winding resistance, meaning again it could cause breakdown.

 YES IN HIGH POWER APPLICATIONS AS SAY 250 KW YOU NEED A HIGH VOLTAGE TRANSFORMER AS 3 PHASE 220 V PRIMARY AND 13.8KV SECONDARY, SO 2 TRANSFORMERS IN SERIES WITH A LOW CURRENT CONTROL YOU CAN CONTROL DE POWER OUTPUT IN LOAD

Standard mains transformers are not designed to operate in saturation so I think you're always going to have a problem with them over-volting or wasting too much power when you try to saturate them in this type of circuit. (But they work fine as saturable reactors because the load limits the max current/power)

---

And of course a saturable reactor is operating with steady-state sinusoidal signals whereas here we are using 'switched mode' type of operation