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Overunity Machines Forum



I tried to rebiuld a Don Smith Device

Started by GM, September 25, 2005, 04:19:40 PM

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0 Members and 6 Guests are viewing this topic.

Google

What happened guys ?  8)

Everyone fell silent after a burst of posts and vdo's. !!!!!!!!!!!

Google

Ok, I am posting a schematic of what I just said in my last post.


Google


dieter

Hi, I was busy winding...


Sounds good. So you can see if there is any gain byh says  additional receivers. Farmhand denies, I don't know, Smith says yes.


When I said blocking, I meant redirect to to some work. Maybe we should clearify something. The term "back EMF" is often used, but not everybody means the same by it. There is A:
Back electromagnetic pulse. This is electrical.
The pulse given by a collapsing field. It flows in reverse polarity and is a short and strong kick. The more immediately the fwd current stops, the higher this kick is.
Even with no coil this pulse can be seen, eg. when you disconnect a high voltage, it may try to maintain the connection by building large sparks during disconnection. And B:


The back electromotive force (this is magnetic) that is basicly Selfinductance of the induced secondary. The magnetism in the core induces a current in the secondary, but that current also causes magnetism in the core, but in the reverse polarity, reducing the efficiency of the primary in common transformers. The approach of preventing this counter force is often named "Lenz-less".


So I was talking about the first one. You should know that regarding to "accepted theories" there is no unknown source of this back emp, but it is the stored inductance in the circuit, stored as magnetic field, even around a single wire, but esp. in a coil. When you turn on the circuit, it takes some time until the coils have built their field. On the other hand, it  takes also a while until they are demagnetized after turning the circuit off.
However, the high accelleration that is a special feature of the back emp may be used somehow.


You may see Ground as the positive electrode during the back emp, and the circuit as ground. The stepup circuit must have an other ground, some Meters away at least.


Something like
+ ---o  o---eeeee---|<---bemfLoad-----Ground2
- ----fwdLoad---|


So the fwd circuit is sparkgap, storage coil, fwdLoad, ground1, the bemf circuit is then Ground2(+)  bemfload, diode, coil, sparkgap, stepup transformer. By allowing the bemf to flow back to the transformer, you draw less energy from there. Just make sure there ain't no semiconductors that cannot handle the spikes (easily 4 times the fwd voltage)  .


BTW a couple of 1kV diodes (standard si diodes) in series can act as HV diode, tho due to the bemf spikes, you need 5 in a 1kV setup. I used to fry several single ones due to the bemf in fwd voltage of about 900V...




BTW. DONT USE MAINS GROUND OR WATERTAP FOR GROUND2!!! the high voltage may jump right to the hot wire in mains grid, since you "draw" HV using your bemf high tension. Instead use a big metal piece in or on the ground as "ground2".

Farmhand

When the primary is tuned to resonance (with a tank circuit) the coil discharge (or what some call the back emf) is incorporated into the "sine like" wave form, as in my feedback oscillator which is not a true Armstrong oscillator in the way it behaves, most feedback oscillators I see for TC operation produce spikes on the primary, mine makes a "sine like" wave form (at full resonant frequency), as can be seen in the video with 12 volts input the primary can have up to 150 volts across it and it has very little DC resistance, the oscillating current is also quite high, this is "Activity" the uAmp meter is a field detector when the primary current is higher the meter is higher when it drops the meter drops. The regular supply amp meter doesn't change much. With less than 5 Watts input we can get hundreds of Watts of oscillating power (or Activity), which is not output, it stays in the system and is built up in a short period of time.

It works like this - the circuit runs from DC pulses, the mosfet has a capacitor across it, so when the primary discharges it fills the capacitor and that causes it to discharge back through the primary the other way, but due to the L/C of the primary and the capacitor the discharge coincides with the resonant frequency of the transformer secondary, the transformer secondary also reapplies it's oscillating power to the primary if it is possible but none goes back to the supply so no actual reactive power, only oscillating power, that is not output. See wave form below, it's the best screen grab I could get from the video. The primary is 10 turns of 1 mm wire so primary resistance is not much. 

There is nothing free about the coil discharge (or what some call back emf) and just to note ! Counter emf is developed to oppose the flow of current in real time (at the same time) as the input current flows in the coil, I consider back emf to be the same as counter emf, the energy released from the magnetic field of the coil is the discharging of the coil as opposed to the charging of the coil, nothing to do with counter emf or back emf in my opinion. The energy released from the coil when it discharges is provided by the supply as the coil is charged, it is input by us. Not free.

And just for the record I did not deny anything, I just said that all indications showed that any amount of receivers cannot receive more energy than is transmitted, that would be like saying the receiver manufactured energy.  :)

Cheers

P.S. Wave form in yellow shows coil discharge is incorporated into the primary "sinus like" wave form. And voltage across the primary peak to peak.

2nd P.S. I can use that Oscillator to "silence" a "Band"  of the radio broadcast at 840 Khz in my local area, if I tune it to do so. Which would be considered to be a bit naughty, hehehe.

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