Author Topic: Proof of concept - perturbing a static magnetic field (Read 60882 times)

z_p_e · « **Reply #60 on:** June 24, 2007, 04:39:59 AM »

Quote from: bob.rennips on June 18, 2007, 01:21:31 PM

Having duplicated Otto&Jason's driver/mosfet combination I've now got a much better setup. The main difference other that using a low side driver and not the high side driver, is the addition of two decoupling capacitors directly across the power inputs to the driver. This removed much of the rubbish and I was getting much crisper square waves when entering high khz 500K+.

I've also noticed that when applying a larger 24V across the coil to generate the static magnetic field, that the ability of one coil to induce into another coil is cut in half, REGARDLESS of the direction of current applied to generate the static magnetic field. In other words it doesn't matter whether N is top of the coil or bottom of the coil, they both have the effect of reducing the coupling between the two inducing bifilar coils.

I expected this to happen in one direction, but thought that in the other direction there would be an enhancement.

Bob,

If you are using a ferromagnetic core, perhaps it was being saturated with the static field applied, and not without it. This would explain the reduced coupling.

Darren

brnbrade · « **Reply #61 on:** June 24, 2007, 06:14:39 AM »

Hello all

This morning I played with resonant frequencies of my walkman in the ring tpu that I built.
I input whit 2 cells 1.5v, and collect 52v 1A in output.
When I decided to put a permanent magnetic ring in turn of the rings collectors and...
Amaze, the readings jumped for more than 250v. with two cell my reader was crazy.

I hope help

Regards

chrisC · « **Reply #62 on:** June 24, 2007, 06:30:58 AM »

@brnbrade

Great! Can you tell us a little bit more of your setup, circuit, current measurements and ring structure please? There is not enough information from your post to understand what we are supposed to understand? Thank you.

Regards
chrisC

brnbrade · « **Reply #63 on:** June 24, 2007, 07:06:29 AM »

Quote from: chrisC on June 24, 2007, 06:30:58 AM

@brnbrade

Great! Can you tell us a little bit more of your setup, circuit, current measurements and ring structure please? There is not enough information from your post to understand what we are supposed to understand? Thank you.

Regards
chrisC

Hi ChrisC
My TPU comprise in 24 turns medium wire and 1000 turns more fine wire in parallel, mounted in pvc tube and isolated well isolated. I put permanent magneto ring in turn of the tpu and reader jumped as crazy above the 250v.

TKS

chrisC · « **Reply #64 on:** June 24, 2007, 07:13:43 AM »

Hi brnbrade:

Thanks for the reply. What was your input frequency (assuming only one?) into the primary and was there analog ammeters measuring the currents in the primary and secondary? A photo or graphics image of the circuit would really be appreciated if that was not too much trouble for you.

Thanks

chrisC

Bruce_TPU · « **Reply #65 on:** June 24, 2007, 07:18:04 AM »

Bingo...

I think brnbrade has found some missing ingredients!
Awesome Job, brnbrade..! More Erfinder, eh? LOL

Cheers,
Bruce

brnbrade · « **Reply #66 on:** June 24, 2007, 07:37:38 AM »

chrisC

The initial reading was of 50v without the ring magnetic permenente.
But, when I put the ring permenente the things left my understanding.
The frequencies were of an old walkmam. The frequencies were of the sound that run of the station tuned in place.
Yes, a transformer, high speaker, the primary vibrating in magnetic field, secondary as collectors.

Tks

brnbrade · « **Reply #67 on:** June 24, 2007, 07:50:26 AM »

Hi

I believe with more amper and faster and broad pulses the thing begins to be interesting.!
In it lives him.!

regards

chrisC · « **Reply #68 on:** June 24, 2007, 07:52:30 AM »

brnbrade:

Thanks indeed. So, you have a old walkman which tuned to a specific AM/FM station of a certain frequency and the output of the jack which would have been connected normally to a headset is not driving your primary coil. Both your primary/secondary are wound around this PVC pipe with a magnet shuffled into the hole of the PVC pipe?

That's seemed really simple. Please confirm your AM/FM station freqiuency. Thanks

Chris

Bruce_TPU · « **Reply #69 on:** June 24, 2007, 07:54:03 AM »

Hi brnbrade,

So you input the frequency with a wire from the headphone jack, and not connect the ground? I heard a story similar once, except that person used his headphone and put it right on the input.

And the Walkman was tuned to AM, FM station, or just static noise?

Yep, Chris asked my question! LOL
Cheers,
Bruce

brnbrade · « **Reply #70 on:** June 24, 2007, 08:13:47 AM »

Hi

The permanent magnetic ring on the outside of the pvc tube. The station was FM stereo.
More thinks that is relevant.
Mine to think it is, the primary works as electromagnet of the pulses of the sound frequency.
A diode rectifier was put in the outlet of the walkman for not having tension return.

Tks

chrisC · « **Reply #71 on:** June 24, 2007, 08:19:37 AM »

brnbrade :

I don't have a good drawing tool. Is it like this? What is the FM frequency?

chrisC

Bruce_TPU · « **Reply #72 on:** June 24, 2007, 08:22:59 AM »

Hi guys,

Remember that story I heard not long ago? It was a FM radio as well. So I agree also, that FM is important. A diode, good thing. Was the magnet near your wires, or setting right on top of them?

Truly amazing to hear two such similar stories. What is different about those waves than the waves we are now sending into our ECD-TPU's?

Do you mind working with those of us who would like to replicate this, brnbrade?

Good question Chris. What was the station number?

brnbrade · « **Reply #73 on:** June 24, 2007, 08:37:25 AM »

Quote from: chrisC on June 24, 2007, 08:19:37 AM

brnbrade :

I don't have a good drawing tool. Is it like this? What is the FM frequency?

chrisC

chrisC

chrisC · « **Reply #74 on:** June 24, 2007, 08:39:51 AM »

Great. Thank you for clarifying! Looking forward to more results from your experiments.
Thanks

chrisC

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