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Author Topic: MEMM  (Read 64901 times)

Offline PaulLowrance

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Re: MEMM
« Reply #45 on: October 18, 2006, 08:12:14 PM »
mramos,

I forgot to post the link. It seems kingrs bought his metglas core through :

http://www.elnamagnetics.com

Paul Lowrance

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Re: MEMM
« Reply #45 on: October 18, 2006, 08:12:14 PM »

Offline MeggerMan

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Re: MEMM
« Reply #46 on: October 19, 2006, 12:42:10 AM »
Hi Paul and MrAmos,
My core is due to arrive on  the 23rd of October (next Monday).
It is the Metglas AMCC-320 and costs $107 + shipping + $3 handling.
If you are feeling flush then you could opt for the AMCC-500 at $140.

They only like to use couriers as the US postal service was not reliable enough.
The 30V 2.5A variable PSU is due to arrive Thur/Fri this week.

I still need to order the TL494CN chips, and I have just discovered tonight that I only have double sided pre-coated laminates (PCB) left so I need to order up some single sided and some tech sheets for the UV work.

The schematic is nearly complete, just need to do the PCB board layout next.
Its all go at the moment, I'm quite excited about seeing this core in the flesh.

Paul, I think you are right about the input power being just right, according to my FEMM 4.0 simulations, the power needed to get the field to switch was tiny, maybe 10mW on a small core.
5W input on the AMCC-320 I would say was overkill, and should be in the region of say 100mW.
But that is with very small load on the output coils (half the input power I think), the simulation can only go so far with this experiment and I think a practical experiment may see the power input go to 1W.

I have to say I hate this site too, it runs the CPU flat out while the page loads, some crappy javascript running in background, pages sometimes fail, not a nice site...ahh well.


Regards

Rob




Offline MeggerMan

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Re: MEMM
« Reply #47 on: October 19, 2006, 12:46:56 AM »
Meg simulation with 10mA, 0.137 V (1.3mW) in the bottom right input coil.
US Steel Type 2 core and N37 Neodimium magnets.
Core is 120mm wide and 100mm high and 50mm deep.

(http://i100.photobucket.com/albums/m25/kingrs/megv1-2.jpg)

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Re: MEMM
« Reply #47 on: October 19, 2006, 12:46:56 AM »
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Offline lancaIV

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Re: MEMM
« Reply #48 on: October 19, 2006, 01:10:25 AM »
Hello Rob,
this 107$ for the Metglas AMCC-320,
could you give me the weight and material volume,please !

For the Mukherjee motor-gen invention(DE...) I would need such material,
but in granular/powder kind !

Sincerely
            de Lanca

Offline PaulLowrance

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Re: MEMM
« Reply #49 on: October 19, 2006, 07:16:39 AM »
Hi mramos,

I might get a free metglass sample. It was supposed to arrive yeserday, but the arrival date changed to Oct. 20th. Not sure if they're playing with me. We'll see. You might be able to get a free sample. Ask for any size sample they have available for testing purposes. If you are not picky and if they have a spare around they might mail it to you.

I'm getting a small 2714AF. As far as efficiency is concerned I think small is better.

Regards,
Paul Lowrance

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Re: MEMM
« Reply #49 on: October 19, 2006, 07:16:39 AM »
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Offline PaulLowrance

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Re: MEMM
« Reply #50 on: October 20, 2006, 07:43:10 PM »
@All

I think the following may help those interested in the MEG, related devices, and further research. I know, I know ... spending too much time on documenting, :) but this is my only hope of defense if I were to suddenly pass on; i.e., if that happened then hopefully the disinformationist would not succeed in convincing people MCE energy is not real or worth much. Please never give up on the MEG. The pulse timing is vitally important!  The amount of load resistance relative to number of secondary turns is vitally important. It would help if the load resistor appropriately changed during the received pulsed, hence it might be worth duplicating Naudin's conditioned resistors. Just make sure you use a common small R (as Naudin did) as a way of measuring the current. IMHO the input power to core is important. That is a lot of combinations. If you change the R 40 times, adjust for 40 different frequencies, and then 40 different input voltages that's 40 * 40 * 40 = 64000 combinations. Please do not give up on the MEG. Finding the exact correct situation for your particular setup could be akin to finding a gold mine, but it will be worth it. Experiment.

First, we know avalanche radiation exists. I prefer to call it "avalanche radiation" over Barkhausen because it's more descriptive and there's a little controversy about Barkhausen, but that's another subject. Point being, we know about the avalanches. We know it is typically UHF radiation for non-electrical cores and considerably lower for conductive cores such as iron. The amount of such radiation that escapes the core is very small. The reason it is small is because the avalanche occurs completely incased within the core and we know the fields have a closed loop, a magnetic short if you will. This easily demonstrated with FEMM. Also we may study induction simulations to learn that core radiation leakage is relative to the materials permeability.

Now to the point. At any given time while we are pulsing a core there are X amount of avalanches occurring that are unstoppable; i.e., if we remove the applied field the avalanches would complete. I refer to this as "Magnetic Momentum" (that's momentum, not moment), and not to be confused with Magnetic Viscosity.

The amount of magnetic momentum varies with material. There are a lot of factors, but the main factors are the materials MCE and its electrical conductivity. I predict that nanocrystalline materials such as Metglas and Finemet have high magnetic momentum.

---

I would like to differentiate the different between MCE energy and common induction. Envision thousands of tiny PM's (permanent magnets) on swivels that forms one big toroid. There is wire that wraps this big toroid to form a standard toroid coil. Basically we have formed a large scale magnetic toroid core with a coil. These tiny magnets are all aligned to form a closed loop-- essentially our core is saturated. Now at a constant rate randomly force say 100 PM's per second to flip. This will induce a net constant voltage. We know that the net constant voltage is not dependant on how fast _each_ PM flips. Rather the net constant voltage depends on _how many_ PM's _per second_ are flipped. So, the induction is relative to how many flipped PM's per second and MCE energy is relative to how fast a PM is flipped.

In other words, if each PM is flipped in 1 ms rather than 10 ms the net constant induced voltage will not change, but there will be more radiation energy. MCE is that radiation energy.

Note that each time a PM is flipped we'll see a dc pulse (a dc spike) in voltage. If the PM flips 1000 times fast, then the _net average_ voltage does not change; i.e., the voltage is 1000 times greater, but the pulse width is 1000 times shorter. So it flips 1000 times faster. The voltage will be 1000 times greater. If the voltage is 1000 times greater then power is 1000000 times greater-- P=V^2/R. Therefore, power is 1000000 times greater, the time is 1000 times less, the resulting energy is 1000 times greater. Energy = time * Voltage^2 / Resistance. If we were to look at this signal on a spectrum we would see that by increasing the flip 1000 times faster results in higher frequencies. If you flipped it fast enough you would have a high-energy gamma photon, and you better duck. ;-)  E=hf

Regards,
Paul Lowrance

Offline MeggerMan

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Re: MEMM
« Reply #51 on: October 20, 2006, 08:42:42 PM »
Hi Paul,
I don't quite understand where the excess energy is coming from.
Is it the change in temperature of the material (MCE) during the input pulse that alters (increases) the stored magnetic energy for when the pulse is removed and picked up by the output coil?

PSU has arrived, core due on Monday, schematic finished, doing track layout now, parts to order over the weekend.

It can output 32v at 2.9A so more than enough for the MEG:
(http://i100.photobucket.com/albums/m25/kingrs/DSCN4724.jpg)

Free Energy | searching for free energy and discussing free energy

Re: MEMM
« Reply #51 on: October 20, 2006, 08:42:42 PM »
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Offline PaulLowrance

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Re: MEMM
« Reply #52 on: October 20, 2006, 09:11:17 PM »
Hi kingrs,

Quote from: kingrs
Hi Paul,
I don't quite understand where the excess energy is coming from.

It comes from ambient temperature. Have you ever tried to pull apart two PM's? It takes energy just as it takes energy for the vibrating atoms to break the alignment of the electron magnetic moments.

It's really simple. When the magnetic moments align we get energy-- MCE radiation. That's basic physics. If your pulse is fast enough then all the avalanches (MCE energy) is a coherent pulse. The avalanches give energy to eddy currents-- magnetic momentum. Note that eddy currents is not required for magnetic momentum. Magnetic momentum consists of the avalanches that have reached a stage where it cannot be stopped. At the correct timing you need your resistor load to gain as much energy as possible from that magnetic momentum. If you read my previous post you'll see the difference between induction and MCE energy.



Quote from: kingrs
PSU has arrived, core due on Monday, schematic finished, doing track layout now, parts to order over the weekend.

It can output 32v at 2.9A so more than enough for the MEG

That's great. Remember though, more does not always equal better. Try a wide range of power input levels. See my previous post and you'll see it could take some time, roughly 64000 different variations.

Are you going to replicate Naudin's conditioned load resistors?

Regards,
Paul Lowrance

Offline MeggerMan

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Re: MEMM
« Reply #53 on: October 21, 2006, 01:04:32 AM »
Hi Paul,

Thank you for the explanation, its nice to see there is a new refridgeration technology emergy using MCE.
 
Looking at JLN's scope shots he appears to be using 24KHz as the input signal, yet if you check his circuit diagram with spec. sheet for the TL494CN, his pulse circuit should start at around 40KHz and end at 100KHz.
Therefore I suspect the timing capacitor C1 may be a larger value like 5nF.
It would make sense to put a rotary switch in here to allow a range of values to enable a large number of frequencies to be covered, from say 1KHz to 100KHz.

(http://i100.photobucket.com/albums/m25/kingrs/meg_pulse.jpg)

 

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Re: MEMM
« Reply #53 on: October 21, 2006, 01:04:32 AM »
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Offline PaulLowrance

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Re: MEMM
« Reply #54 on: October 21, 2006, 01:12:49 AM »
Hi kingrs,

Quote from: kingrs
It would make sense to put a rotary switch in here to allow a range of values to enable a large number of frequencies to be covered, from say 1KHz to 100KHz.

That would be a smart thing to do. Truthfully, I think Naudin was all over the place, spent a great deal of time on his MEG, varying all the parameters. I wish he posted scope shots of all variations of input voltages, frequencies, etc.

Do you plan on documenting and taking lots of scope shots?  Also I think it's a good idea to eventually try and replicate Naudin's conditioned 100K load resister.

Regards,
Paul Lowrance

Offline PaulLowrance

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Re: MEMM
« Reply #55 on: October 21, 2006, 01:19:56 AM »
There's something about the MEG shots that I don't understand. I don't understand why the actuator current resembles a sine wave if the voltage is a square wave. Shouldn't it be either a saw tooth or an exponentially increasing saw tooth wave? If the core begins to saturate then the permeability decreases, which means di/dt should increase.

The only way it could be like a sine wave is if the resistance is significant. You know, an RL time constant. If the resistance is appreciable then initially the current will increase and eventually will level out due to resistance. You know what I mean?

Why would there be any appreciable actuator resistance? He shows the coil as 1.6 ohms and if the MOSFET is properly turned on it should be 0.04 ohms.

Regards,
Paul Lowrance

Free Energy | searching for free energy and discussing free energy

Re: MEMM
« Reply #55 on: October 21, 2006, 01:19:56 AM »
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Offline MeggerMan

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Re: MEMM
« Reply #56 on: October 21, 2006, 12:17:04 PM »
Hi Paul,
I am not sure about the replicating the output load resistor, a carbon resistor should be the same what ever you do to it. 
I will just use a large wattage carbon resistor or series of them.
I can see there being a possible issue with a wirewound resistor.

Also JLN's scope shots include the power for the pulse drive circuit so to show that the output efficiency as being better at the higher voltage may be a result of the driver circuit using a fixed amount and this fixed amount becomes less significant to the overall power consumption as the voltage input increases. 
I think therefore the driver circuit needs to be run off a seperate supply which is what I shall do.

I do not think the coil is a 1.6 Ohm resistor, according to the circuit diagram, this is actually a resistor in series with the coil to reduce the current flow through the coil.  I do not understand why this is required and will in effect cause a power loss in the pulse circuit in the form of heat.  I can only think this is there to allow a larger input voltage.
I will take this off the board and therefore it can be added externally as an option.

From all my simulations the drive voltage for the pulse needs to less than a volt, therefore by seperating the drive supply and using my variable output PSU I can get a sub 1Volt pulse into the circuit.

The sine wave shaped drive current is probably a result of the resonance built up in the core.
I think when you first apply power to a transformer, there is a huge current surge until it starts to stablise, probably lasting a couple of cycles.
The coil's capacitance and core saturation can also shape the current.
I know very little about this topic.

Have a read of this:
http://www.butlerwinding.com/elelectronic-transformer/pulse_transformer/index.html

Regards

Rob

Offline PaulLowrance

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Re: MEMM
« Reply #57 on: October 21, 2006, 04:25:01 PM »
Quote from: kingrs
I do not think the coil is a 1.6 Ohm resistor, according to the circuit diagram, this is actually a resistor in series with the coil to reduce the current flow through the coil.

OK, I just thought 1.6 R was just depicting the coils internal resistance.

I'd like to build this circuit in LTSpice and see what happens? Any estimates what the internal actuator coils capacitance is?

Regards,
Paul Lowrance

Offline PaulLowrance

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Re: MEMM
« Reply #58 on: October 21, 2006, 10:23:50 PM »
I just completed an LTSpice circuit simulation of Naudin's MEGv2.1 and found some very interesting results. I used v2.1 because Naudin shows the actuator currents, which is important. Below are three images of the circuit, the actuator current, and the output.

I found out that the unusual actuator current is due to mutual coupling and not capacitance. Actually capacitance has the opposite effect in that it causes the current to initially surge.

Anyhow, after doing some research on various size inductors and how series & parallel resistance and parallel capacitance changes between inductors I came up with some good estimates on Naudin's MEG. Given wire size and so on I calculated 1.4 ohms for his actuator coil. Naudin has 1.6 ohms. So it's safe to say the extra 1.6 ohms simply represents actuator resistance. Also the 37 ohms is the secondary resistance.

Amazingly I was able to find an actual BUZ11 spice library, so this is very accurate simulation as far as parts.

Initial simulations were showing completely different actuator currents than Naudin's. After getting into the details discovered the secret was mutual coupling coefficients. So I entered appropriate coefficients according to Naudin's MEG core. When they were entered you can see the results are almost exactly to Naudin's MEG with one major difference, the secondary output voltage versus actuator current. :)  According to simulations, I had to bring the input voltage way down to get 280 mA actuator current, BUT Naudin's output voltage is 3.86 times greater!  According the MCE theory this extra output voltage is caused by what I call Magnetic Momentum. What is very interesting is Naudin's scope shots shows the output as 28.98 W and the input as 2.373 W. That is 12.21 times greater. We know that power is relative to the square of the voltage. If we square 3.86 we get 14.9.  That's very close to Naudin's 12.21 ratio.

I am not saying the above is proof that Naudin was telling the truth and that his scope shots are not faked, but I spent a good amount of time with LTSpice and the MEGv21 circuit, playing with stray capacitance and all. So far it is very interesting and worth investigating.

Attached is a zip file that contains the LTSpice file of the Megv21 and the BUZ11 spice library for anyone who wants to play with this. LTSpice is one of the best simulators. Best of all, it's free, created by Linear Technology, one of the best high end ADC manufacturers in the industry. Note that you will need the place the BUZ11 file in [your hard drive]:\Program Files\LTC\SwCADIII\lib\sub\

There are 3 attached images, which I think you need to click on to enlarge. One of the circuit. Another of the actuator current --> I(L2) purple graph.  Another of the secondary output --> Orange is power, purple is voltage, turquoise is current.


Regards,
Paul Lowrance

Offline MeggerMan

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Re: MEMM
« Reply #59 on: October 22, 2006, 02:00:35 AM »
Hi Paul,
I do not know how to calculate the capacitance of a coil, there are so many variables that I guess you would need to wind it then test it.

I downloaded the LT Spice and ran your simulation.
What an amazing piece of software this is!

I added an extra 1.6Ohm resistor to the circuit in series with the input coils and it seems to make little difference to the current, which seems odd.

You can see the back emf voltage in the input coil jump to 70V for a very brief period, then it bounces slightly at around 28V until the next pulse.
This means the mosfet would need to be able to cope with around 80 volts across source and drain.

How did you couple L1 and L2 to L3 and L4?

I have looked at the spec on the TL494CN chip again because I was worried that it would not be possible to have a dead time between pulses, so I started at looking at other function generator chips today to see if there was an alternative and the closest I came up with was the Exar XR-2206 chip:
http://www.exar.com/products/XR2206v103.pdf

Looks good but only has a single output so I would need to couple this to a flip-flop and then some output transistors.

So I went back to the TL494CN and I realised that I had mis-read the test wave forms.
It is possible to have a dead time between pulses by using the PWM input.
So its possible to vary the amount of dead time between pulses.

I found a rather good/inexpensive multi-meter for measuring frequency and duty cycle.
Tenma 72-7735
http://mcmb2b.com/cgi-bin/test/72-7735.html
It has an RS232 output too.
They also do an inductance meter 72-8155 but I cannot find a local supplier for it.

Regards

Rob

 

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