TPU Continuum

[TinMan]

Ion

I refreshed the page ,and your comment about putting a diode across the coil was gone 

Giving that idea some thought,i wouldnt have thought that the inductive kickback wouldnt be an issue,as the current continues to flow in the same direction during the kickback part of the cycle,meaning that the induced magnetic field would also remain the same.

But anyway,i will give it a try.


Brad.

[ion]

Ion

I refreshed the page ,and your comment about putting a diode across the coil was gone 

Giving that idea some thought,i wouldnt have thought that the inductive kickback would be an issue,as the current continues to flow in the same direction during the kickback part of the cycle,meaning that the induced magnetic field would also remain the same.

But anyway,i will give it a try.


Brad.

Hi Brad

I am looking around for some cores to try this out on, but find the stuff I have doesn't work in any of the modes talked about, even AC. I didn't want to post something I hadn't tested  first so I deleted it.

Yes, the current tries to flow in the same direction, but can't as the circuit is opened so the current is now drastically reduced when the arc (spark) is extinguished at the moment the circuit opens. During the exact moment of circuit break the coil voltage goes sky high (current goes to near zero) and oscillates, probably demagnetizing the core.

Think old school ignition circuits for autos, the field collapses because the current path is broken by the points. The rapid decay of flux due to lack of a current path  induces into the HV winding and establishes a new current path in the spark plug gap.

The idea was to keep the current flowing in the same direction with the diode and allowing a soft landing for the flux. The diode was to be placed across the coil and kept there while the power supply is momentarily placed across the diode, plus on anode neg on cathode.

As for AC working better than DC, it is probably the soft flux landing as the current goes to zero, but won't be sure till I test it.

Your HF observation is interesting and needs to be tested further. I wonder if the HF can create a preferred bias in the domains?
This would be new to me if it did. There are probably other explanations, but this eludes me ATM

Critical and focused observation is the key to discovering new things.

[ion]

FWIW, I found a piece of steel lying around in the shape of a large U, 1 1/4 x 1/2 x 4" long.

It had a very weak magnet effect so I totally erased it using a VHS bulk tape eraser. When finished it couldn't pick up a pin.

Using a diode across the coil, I can magnetize the piece from DC very strongly in either polarity with a quick tap to a very small 12V battery.

It does not drop the keeper, and even when the keeper is removed, it attracts it strongly again.

I can reverse the coil leads and a quick tap demagnetizes it, a long series of tap restores full strength.

I will do some static Gauss measurements vs current pulse to see if I can get a handle on this.

I suspect the piece of steel was originally made of a magnet grade material, but very old so may predate Alnico.

So a soft steel is what is needed for these tests, not old school magnet grade material.

However this could lead to some interesting experiments. The fact that this piece is so easily strongly magnetized in either direction after complete demagnetization may lend some credence to the work of Floyd Sweet's VTA. Could it be there is a domain memory effect that can be utilized? You may wish to experiment with this.

I'm sure this is well explored in the everyday magnet makers knowledge base, as it is the usual method for making magnets, but who knows what other discoveries may lurk in Floyd's process.

[TinMan]

author=ion link=topic=3710.msg72201#msg72201 date=1549653409]

FWIW, I found a piece of steel lying around in the shape of a large U, 1 1/4 x 1/2 x 4" long.

It had a very weak magnet effect so I totally erased it using a VHS bulk tape eraser. When finished it couldn't pick up a pin.

Ok,i tried placing a diode across the coil,so as the current can continue to flow through the coil once the source is disconnected,and it made no difference--still cant get the two halves to stick together.

But,using an AC current,and as Graham showed,i can get the two halves to stick together.
Remember,this is only with using ferrite core halves,as when using steel there is no problem at all to get the keeper to stick.

Using a diode across the coil, I can magnetize the piece from DC very strongly in either polarity with a quick tap to a very small 12V battery.

It does not drop the keeper, and even when the keeper is removed, it attracts it strongly again.

I can reverse the coil leads and a quick tap demagnetizes it, a long series of tap restores full strength.

Yes,this is how i magnetise my screwdrivers when need be.

However this could lead to some interesting experiments. The fact that this piece is so easily strongly magnetized in either direction after complete demagnetization may lend some credence to the work of Floyd Sweet's VTA. Could it be there is a domain memory effect that can be utilized? You may wish to experiment with this. I'm sure this is well explored in the everyday magnet makers knowledge base, as it is the usual method for making magnets, but who knows what other discoveries may lurk in Floyd's process.

I have never looked into Floyd's Sweet's device,so i may go have a quick look now.


Brad

[ion]

Brad said:

I have never looked into Floyd's Sweet's device,so i may go have a quick look now.

As you are a believer that energy can come from magnets, you surely should study all you can on the Floyd Sweet and Hans Coler devices.

Believe it or not Chris Sykes (EMJunkie) did some very good research on the Sweet device (before he became a provocateur), which is on his website HYIQ.org. Like many OU devices it remains an enigma with no successful replications that I know of.

It involved demagnetizing a particular type of magnetic material, then conditioning in such a way that the domains were easily flipped between states with a small control signal, if I recall correctly.

There are also many good papers on the Coler device floating around, I believe Smudge studied it deeply.

I will retry the experiments with ferrites, but as yet I can't get any that I had on hand to stick, AC or DC. Will look around a bit more. From what did you salvage your ferrites of interest?

Regards

[Dave45]

Thinking out loud 

[TinMan]

 author=ion link=topic=3710.msg72240#msg72240 date=1549720128]

As you are a believer that energy can come from magnets, you surely should study all you can on the Floyd Sweet and Hans Coler devices.

I will now.

Believe it or not Chris Sykes (EMJunkie) did some very good research on the Sweet device (before he became a provocateur), which is on his website HYIQ.org. Like many OU devices it remains an enigma with no successful replications that I know of.

I just dont know why Chris went pear shaped after some tried to explain the difference between AC and DC coupling on a scope.

It involved demagnetizing a particular type of magnetic material, then conditioning in such a way that the domains were easily flipped between states with a small control signal, if I recall correctly.

Alnico magnets are very easy to flip the magnetic polarity in them.

I will retry the experiments with ferrites, but as yet I can't get any that I had on hand to stick, AC or DC. Will look around a bit more. From what did you salvage your ferrites of interest?

I got mine from old CRT computer monitor flyback transformers--like Gum's.


Brad

[TinMan]

ION

Are there any threads here on OUR in regards to floyd sweets VTA ?


Brad

[ion]

ION

Are there any threads here on OUR in regards to floyd sweets VTA ?


Brad

If you do a search here for "Floyd Sweet VTA" there are lots of hits but I didn't find a dedicated thread. Maybe I missed it.

As for the cores, I'll find some of those as I have lots of flyback transformers lying around. Has anyone tried yoke ferrites?

[Smudge]

Does this help?

Smudge

[ion]

Does this help?

Smudge

Thank you Smudge, a fairly thorough paper on the device. I figured you would know a lot about this device.

Do you have any conclusions?, as the TVQ Misiolek group thinks it may have been faked.

[Grumpy]

Ref. to TVQ group's thoughts on the VTA:

http://www.overunityresearch.com/index.php?action=dlattach;topic=2704.0;attach=15736

[TinMan]

Does this help?

Smudge

No,not much.
Already looked at that paper.

From what i can make out,a block magnet has coils wrapped around each face-length,width,and height.
This is to flip the field to either the length sides,widths sides,or height sides--correct?
Then we have to have this barium ferrite magnet,and condition it,so as the poles can easily be flipped.
Seems like a whole lot of mucking around to me.

I will draw up a much simple version,using !off the shelf! parts,and no conditioning needed.

I'll get the parts needed,and one of you EE guys can design the simple switching circuit.

We will need an AC square wave,where the pulse width on each half of the cycle can be altered--say from 2% to 30%,where the positive and negative pulse width alters the same percentage when you turn the pot.
The frequency will need to be around the 50-100Hz range--a starting point.

We do not need these special conditioned magnets.
All we need is some Alnico and Neodymium magnets used together to get the same effect.


Brad

[ion]

Just use a good quality audio amplifier of sufficient power output and your FG driving it. Do be careful to use proper fusing or current limiting or you may fry the amp. A car power amp would also work well.

[TinMan]

Just use a good quality audio amplifier of sufficient power output and your FG driving it. Do be careful to use proper fusing or current limiting or you may fry the amp. A car power amp would also work well.

I do not think my FG can have(for example) a 5% duty cycle on each half of the cycle.
If i make the top have(positive)5%,then the bottom half(reverse current) will be 95%.


Brad

[TinMan]

Ok,below is my version of a solid state reluctance generator.

Thought's ?


Brad

Fixed 

[ion]

I do not think my FG can have(for example) a 5% duty cycle on each half of the cycle.
If i make the top have(positive)5%,then the bottom half(reverse current) will be 95%.


Brad

In that case to keep it simple , use a differentiator (C-R) from the square out of your FG. This should give you nice sharp pulses and you can adjust the duty by changing the C-R time constant.

I couldn't guess if your idea will work or not but hey, give it a go, nothing  to lose and everything to gain.

[TinMan]

Here is a video i found in relation to switching the poles on an Alnico magnet when alongside a Neo magnet,by Robert Murray Smith

https://www.youtube.com/watch?v=n4YD8Nvyfa4


Brad

[gotoluc]

Here is a video i found in relation to switching the poles on an Alnico magnet when alongside a Neo magnet,by Robert Murray Smith

https://www.youtube.com/watch?v=n4YD8Nvyfa4


Brad

And here is a video from 2016 of a test device I made using Roberts idea and going further to a flux gate.
You can read Robert's comment below my video.

https://youtu.be/0VlhMI5tv5Y

Cheers
Luc

[Magluvin]

Ok,below is my version of a solid state reluctance generator.

Thought's ?


Brad

Fixed 

Using an alnico magnet where it is in your diagram, is it that since it is magnetized, it pulls more of the neo flux in that direction than to the L1 leg of the magnetic circuit? And then the pulse coil temporarily reverses the alnico so that more flux of the neo goes to the L1 leg?

Mags

[TinMan]

Mags

Using an alnico magnet where it is in your diagram, is it that since it is magnetized, it pulls more of the neo flux in that direction than to the L1 leg of the magnetic circuit?

Yes

And then the pulse coil temporarily reverses the alnico so that more flux of the neo goes to the L1 leg?

No
Once a pulse is sent to the coil around the alnico magnet,the magnetic domains are reversed in the magnet,and the magnet retains it's flipped field without current flowing through the coil around the magnet..
You then need another pulse of current in the opposite direction to once again flip the alnico's
magnetic field.


Brad

[TinMan]

And here is a video from 2016 of a test device I made using Roberts idea and going further to a flux gate.
You can read Robert's comment below my video.

https://youtu.be/0VlhMI5tv5Y

Cheers
Luc

Yes,just like that Luc.

If you still have that setup,all you need to do now is wrap a coil around the keeper you placed on top as your flux bridge.

Wish i had me some of those large Alnico magnets like your's.
They don't have them on AU ebay,just small ones.


Brad

[ion]

And here is a video from 2016 of a test device I made using Roberts idea and going further to a flux gate.
You can read Robert's comment below my video.

https://youtu.be/0VlhMI5tv5Y

Cheers
Luc

Hi Luc

Nice demo video of the operation of the flux switcher.

Question: what thickness are the yellow spacers and what is the material made of?

I would be curious to know what effect a pulse of various energy levels is required to just switch the AlNiCo, without the Neos in the circuit, and what Gauss level you get at the poles vs energy in.

Then compare that to the equivalent steady state power required just using a piece of soft steel in place of the AlNiCo.

I'm wondering if pulse energy could be made very sharp from a much higher voltage source with less duty cycle, and what effect that would have.

Regards,

[JimBoot]

Yes,just like that Luc.

If you still have that setup,all you need to do now is wrap a coil around the keeper you placed on top as your flux bridge.

Wish i had me some of those large Alnico magnets like your's.
They don't have them on AU ebay,just small ones.


Brad

What devices would alnico most likely be used in?

[ion]

What devices would alnico most likely be used in?

Hi Jim
Large and small speakers  of the 40's, 50's, 60's and D'Arsonval meters movements or large to small and even toy PM motors to name a few. Anything before the ceramic magnet era.