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Author Topic: MEMM  (Read 64797 times)

Offline MeggerMan

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Re: MEMM
« Reply #75 on: October 28, 2006, 12:30:28 AM »
Hi Stefan,
I think the ratio of tape to ferrous material will be very large, so in effect you will end up with a core made of 99% pastic.
I'm leaving the building of the cores themselves to the experts at Metglas or Hitachi metals.

Hi Paul,

I have emailed JLN to ask what material he used for the permanent and whether he tried altering the DTC - dead time control on the TL494 to allow a gap in between the two input pulses.
What I suspect is that it may be able to get a different peak frequency using this variable DTC and possibly getting an even better COP.
At the moment the two input pulses are right on top of each other(follow one right after the other) and leaving a small gap may allow the output waveform to form its peak at a lower or higher frequency.

I am looking at testing both with and without DTC to see if I can improve upon the experiment that JLN carried out.

Using 555 timers for this will be complex and I suggest sticking with the TL494 as it is built for this push-pull process.
There are even faster/high current and more up to date versions of the TL494 but I think these might be a bridge too far.

Regards

Rob

Free Energy | searching for free energy and discussing free energy

Re: MEMM
« Reply #75 on: October 28, 2006, 12:30:28 AM »

Offline lancaIV

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Re: MEMM
« Reply #76 on: October 28, 2006, 03:20:24 AM »
Hello MEMM-audience,
Molina-Martinez used,following his patent description, Hyperco !

S
  dL

Offline PaulLowrance

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Re: MEMM
« Reply #77 on: October 28, 2006, 07:38:03 PM »
Stefan,
Do you know of any high perm. magnetic tapes? That would be good for my Method #2.  Method #1 is all about having the Eddy currents absorb MCE energy, which is why the MEG relies on electrically conductive cores. Most ferrites will not work for method #1 unless the ferrite has electrically conductive magnetic powder.


Rob,
Do you have any scope shots? Hopefully Naudin will reply because he should have books of tips. It seems Naudin spent a great deal of time precisely replicating the MEG. He'll probably recommend the conditioned resistors, which might be worth a try.


I'm still messing with taking MCE measurements on the Metglas. For some reason the office has been flooded with thermal noise fluctuations, intense electrostatic random fields. It took one day to narrow down and finally accept that my LM741 burnt up.

Anyone who's interested,

---
How to measure MCE:

Place two thick copper wires down the center of toroid core #1-- the thicker the better. Three feet long is fine. The two wires will always be in series. Through out the entire experiment you will run DC current through both the wires. The amount of DC current depends on the core material. You will need to bring the core to at least 1 T or saturation. Core #2 does not have any wires going through it, but it should be slightly above the two wires and close to core #1. There should be no wires touching core #1 or core #2. On top of each core is a Thermistor. You should place heat sync grease under and around the thermistor and core to help thermal conductivity. The thermistors go to an op-amp circuit. See attached image. A gain of 100 is fine for 100K Thermistors. One lead from each Thermistor goes to ground, while one lead from Thermistor #1 goes to op-amp negative input, and one lead from Thermistor #2 goes to op-amp positive input. This will eliminate any op-amp output changes with room temperature change, but a noticeable op-amp output change if the temperature changes in just one core. Therefore, if just core #1 temperature changes then we'll see the op-amp output change, but if the room temperature changes then we'll see no change on the op-amps output. Each Thermistor should be at least 100 KOhm.

Stage #1. The wires are connected so the DC currents create an applied field on toroid core #1. Also your op-amp filter should filter out higher frequencies. Two 22 uF capacitors work just fine; i.e., one cap from output to ?in, and the cap from +in to ground. Make sure the toroid cores are touching the least amount of solid. Stagnate air is one of the best heat insulations. You will need to completely cover the toroids to prevent any air circulating on the cores. It will take some time for the heat waves to settle down. Eventually you get a steady signal from your op-amp output. Note you'll want to use the op-amp balance pins. You can slow adjust a fine precision pot so the op-amps output approaches zero volts.

Stage #2. You will need to quickly swap the two wires so the currents in core #1 are canceled. This means there's no current in the core. IOW, current runs one direction through wire #1, but current runs the opposite direction in wire #2. You should always have a cap across one of the wires to dampen any spikes when you swap the wires. Use two switches such as a solenoid to swap the two wires. You want the wires to carry current as often as possible. The goal is to maintain the same temperature throughout the entire experiment. After you swap the two wires core #1 will need to be degauss. One method of degaussing core #1 is with a 3rd wire going through core #1. You will need to apply AC current (no DC current) through wire #3 and then slowly dampen the AC current until there's eventually no current. The AC current needs to at least be as high as the total current in wire #1 and #2. It should only take a few seconds at most to degauss the core. Although cores with square hysteresis curves may take longer. So now the core is degaussed and the temperature should drop. You need to write down how fast the temperature drops and to what degree. A graph would be great. It will probably take at least one minute before you'll see a good change in temperature and several minutes to reach peak.

When the temperature changes settle down, you can swap the two wires again so there's a net applied field in core #1. Now the core will heat up. You will once again record the temperature changes. This completes one full cycle. Now you can once again swap the wires and degauss the core for another cycle.

You want to make sure the core is truly saturated during stage #1 and completely degaussed in stage #2. You can verify this by running a tiny amount of constant ac current through core #1 and measure the voltage across the core. This will show the permeability factor. The voltage across the core should be maximum when the core is degaussed and minimum when saturated. Remember, the ac current must remain the same.

See the attached image. The POT (R10) is to balance your thermistors since no two thermistors are alike. You'll probably want to make R10 a large resistor in series with a large pot unless you have a pot with enough resistance. I drew the Thermistor (R5) as 98.7K merely as an example to demonstrate that two thermistors are not alike. R6 & R8 should be matched resistors or two adjusted pots since they need to be the same resistance. I find the old LM741 a good choice believe it or not because the 741 doesn't mind big capacitors. Surely there's always a better choice. The circuit drawing does not show the op-amp balance resistors. Op-amp pin 1 goes to one end of a 200 K pot, pin 5 goes to the other end of the 200 K pot, the center of the pot goes to a 200 K resistor, which goes to V+. If 200 K does not offer enough balance then try 100 K values.


Regards,
Paul Lowrance

Free Energy | searching for free energy and discussing free energy

Re: MEMM
« Reply #77 on: October 28, 2006, 07:38:03 PM »
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Offline Kator01

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Re: MEMM
« Reply #78 on: October 28, 2006, 10:13:32 PM »
Hello PaulL,

I simply can not follow what you are descrining here :

Place two thick copper wires down the center of toroid core #1


Please can you explain by a simple drawing what you mean when you say :
 Place ... down the center - and later : the wires  in series ???

It is really confusing because 2 wires in series ?? why not use one wire then ??

Regards
Kator

Offline MeggerMan

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Re: MEMM
« Reply #79 on: October 28, 2006, 11:01:59 PM »
Hi Paul,
Yes I am confused too with the arrangement of the wires.
Don't you mean you wind a couple of hundred turns onto the toroidal core?
Using two wires (two coils) means a simple setup but you could use a 2 pole change-over switch and just use one coil.

Regards

Rob

Free Energy | searching for free energy and discussing free energy

Re: MEMM
« Reply #79 on: October 28, 2006, 11:01:59 PM »
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Offline MeggerMan

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Re: MEMM
« Reply #80 on: October 29, 2006, 02:30:29 AM »
Hi Paul,
By adding a resistor (150R) and capacitor(2nf) across the ground and coil inputs you can remove that nasty back emf:

Offline PaulLowrance

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Re: MEMM
« Reply #81 on: October 29, 2006, 12:19:37 PM »
Hi Kator and Rob,

This experiment is used to determine the amount of MCE in a core.

The attached image is a simpler version. There is a toroid (gray) and a switch (green) and two wires (red & blue). When the switch is position A the current runs down the red wire and then down once again through the blue wire.  When the switch is position B the current runs down the red wire, but then up the blue wire.  In position A there's a net current going through the toroid. In position B the current in the red and blue wire cancel each other out.

The idea is maintain a constant temperature. The amount of heat given off by the wires is equal to Turns * Current. The direction of current does not change the amount of heat given off by the wires. Therefore, the core will receive the same amount of heat from the wires regardless if the switch is in position A or B.

Regards,
Paul Lowrance

Free Energy | searching for free energy and discussing free energy

Re: MEMM
« Reply #81 on: October 29, 2006, 12:19:37 PM »
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Offline PaulLowrance

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Re: MEMM
« Reply #82 on: October 29, 2006, 12:28:38 PM »
Hi Paul,
By adding a resistor (150R) and capacitor(2nf) across the ground and coil inputs you can remove that nasty back emf:

Yeah, that's a good idea. I just place a cap across the red wire so when the switch breaks the current the cores energy can dissipate across the cap. I think 150 ohms like you said is fine. Also the caps internal resistance is good enough. The lower the R just means the energy dissipates at a slower rate with a little extra ringing. The ringing helps degauss the core a tad. ;)  Although you really need a separate wire through the toroid & circuit to properly degauss the toroid. Do you have a good circuit that would work for degaussing?

Regards,
Paul Lowrance

Offline MeggerMan

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Re: MEMM
« Reply #83 on: October 30, 2006, 02:09:29 PM »
Hi Paul,
The core should not need to be de-gaussed.
If the field is permanently alligned in some way then surely you have a bad core material.

I suppose the TL494 could be used as de-gauss tool, connected to a "H" bridge so that the single coil can be used.
This way the polarity can be flipped at several khz.

I have been looking at the various PWM chips that Texas Instruments manufacture.
The TL598 looks like a better choice than the TL494 in that it has a totem-pole output stage. So there is not pull-up or pull-down resistor required which should reduce power consumption but more importantly the switching time on/off and off/on will be faster and hence will save power in the switching of the output stage.

Also they have some more recent devices with what I think is called "TrueDrive" for a high speed, high current drive into the output MOSFET. I think these are also available as a device that sits between the pulse chip and the mosfet.

All these bits may add up to a few percent of input efficiency but if the output is twice the input then it would mean that its not too important at this stage and can be looked at later once the concept is proved to work.

Regards

Rob

Regards

Rob

Free Energy | searching for free energy and discussing free energy

Re: MEMM
« Reply #83 on: October 30, 2006, 02:09:29 PM »
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Offline PaulLowrance

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Re: MEMM
« Reply #84 on: October 30, 2006, 05:28:17 PM »
Hi Rob,

Any word from Naudin?

...

The Metglas cores have square hysteresis curves. If you saturate the core and remove the applied field most of the field will remain. Don't you think it's important to degauss the core for the MCE experiment?

Regards,
Paul Lowrance

Offline PaulLowrance

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Re: MEMM
« Reply #85 on: October 30, 2006, 06:41:26 PM »
Hi,

I updated the MCE experiment
http://peswiki.com/index.php/Site:MEMM#How_to_measure_MCE

Regards,
Paul Lowrance

Free Energy | searching for free energy and discussing free energy

Re: MEMM
« Reply #85 on: October 30, 2006, 06:41:26 PM »
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Offline MeggerMan

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Re: MEMM
« Reply #86 on: October 30, 2006, 07:55:06 PM »
Hi Paul,

Paul Lowrance wrote:
Quote
Any word from Naudin?

No nothing yet, he is usually very good in getting back to me, so I can only think he is deep into some research at the moment.

Paul Lowrance wrote:
Quote
Don't you think it's important to degauss the core for the MCE experiment?

If the flux polarity can be switched at 24khz and above then cannot see why you should need to worry about degaussing it.
As I understand it, you only degauss something that can retain a magnetic field, like materials used for a permanent magnet or a piece of audio/video tape.
e.g.
If you place a screwdriver into a coil of wire (say 500 turns) and pass DC current of a few amps into coil for one second the screwdriver will be magnetized and will stay this way for many months.
I once made up a coil on a piece of 15mm copper tube for a mate of mine who is a plumber, and he thinks its great that he can now magnetise all his tools using a drill battery pack and this coil.

Try placing a powerful rare earth magnet on your core, remove it and then see if the core can attract a small piece of soft iron.

Regards

Rob

Offline PaulLowrance

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Re: MEMM
« Reply #87 on: October 30, 2006, 09:03:06 PM »
Now I see. You thought I was talking about the MEG when I was talking about the MCE experiment. In the MCE experiment the core must be degaussed to get accurate MCE readings.  The purpose of the MCE experiment is to determine how effective a magnetic core is for "free energy."  Anyhow, the MEMM wiki should clarify this. :-)
http://peswiki.com/index.php/Site:MEMM

Rob, in your conversations with Naudin did it seem he encouraged people to replicate the MEG?

I just cannot understand why Naudin did not publish any details about his attempts to close the loop. His MEGv21 documentation was superb, but the other versions were not fully documented.

Regards,
Paul Lowrance

Offline MeggerMan

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Re: MEMM
« Reply #88 on: October 30, 2006, 11:36:15 PM »
Hi Paul,
No, I knew you were talking about the MCE experiment.
You have a Metglas toroid which should have the same properties as the Metglas cut C core.
The toroid should be able to handle 25 to maybe 100khz pulsed current.
Therefore I would have thought that you should not need to degauss the core between switching polarity.

Re. JLN MEG
I think it was the fact that the resistor did not heat up quickly enough to show the level of power shown in the scope.
It looks like that was his main concern  that stopped him from exploring it further.
He agrees with Thomas Bearden's claim and managed to get the same results.

He also says that a COP >1 will only be confirmed by a closed loop.
Reading between the lines, I think he would be very pleased to see someone finish what he started.

He managed to power a 9w fluorescent lamp from 3w input, so I would have thought that it should be possible to work out the equivalent power to produce the same amount of light or supply it with enough mains power to create the same amount of light using different balast resistors and measuring the current on a true RMS meter.

regards

Rob

Offline MeggerMan

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Re: MEMM
« Reply #89 on: November 01, 2006, 10:39:27 PM »
Hi Paul and anyone else following this thread,

Just thought I would update you on my progress at the moment.

I have ordered the following:

enamelled copper wire:
1 Kg of 0.4mm
0.5Kg of 0.5mm
0.5Kg of 0.6mm

test equipment:
Tenma 72-7760 DMM
Tenma 72-960 LCR meter

components:
4 x TL494 PWM controller
2 x TL494CDG4 PWM controller
2 x UC28025DWG4 PWM controller
4 x 2SK3586-01 100V 73A 0.025R power MOSFET
2 x CASE, DESKTOP ABS+AP 225X165X90
5 x 1N5820 schottky diodes 3A 20v
10 x 1R resistor 0.5W
50 x 6R2 resistor 0.5W
4 x 15V 5w zenner

Parts outstanding is 2 x LCD temperature meters, single sided PCB, PCB drafting sheet, tin plating powder.

I have opted for two types of controller chip, the TL494 which you know about and the UC28025.
The later is surface mount with 0.05" pitch so will save drilling the 16 holes in the PCB.

I have chosen this because:
1. It was in stock at Farnell (quite important).
2. Up to 1.5A of output current to directly drive the MOSFET gate (uses a totem-pole outputs).

At the moment I am trying to figure out the best way to mount the output coil formers onto the core.
I have some Kapton sheet and various plastics I can try.
Then I need to build a rig to sit the C core into for winding.

Looking on the TI site there are some PWM controllers that can obtain a 97% efficiency with the ideal conditions.

Regards

Rob


 

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