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Author Topic: Some Bifilar coil experiments  (Read 69491 times)

evostars

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Re: Some Bifilar coil experiments
« Reply #15 on: April 12, 2017, 02:09:23 PM »
I've made a video showing the working experiment producing 950Vdc:
https://youtu.be/KbtK9jrk_JI

Ambient9

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Re: Some Bifilar coil experiments
« Reply #16 on: April 12, 2017, 05:20:56 PM »
I've made a video showing the working experiment producing 950Vdc:
https://youtu.be/KbtK9jrk_JI

Great job! Well done! very interesting experiments!
Have you tried to measure the current with a load? or even to make a closed loop?

Keep it up  ;)


dieter

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Re: Some Bifilar coil experiments
« Reply #17 on: April 12, 2017, 08:06:40 PM »
Very impressive, thanks for the vid.


The caps load in about 1 sec, that's about 1.6uF * 900sqr /2...about 64 millijoule/s.


Anyway, it would be easier if you used a certain load, such as a 100 Ohm resistor, then you measure amps * volts = watts, and compare it with input watts. It is however an unusual way to step a voltage up. A standing wave does that. From my POV the art of profession would be an automatic frequency adjuster that compensates for the output that usually kills the resonance.


Anyway, interesting stuff.

shylo

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Re: Some Bifilar coil experiments
« Reply #18 on: April 12, 2017, 09:11:42 PM »
I don't understand why everything turns into a pissing match.
TK is very smart ,Listen to what he says ,answer his questions ,if you can ,if you don't understand ,say so.
If the question is lacking in understanding ,then explain why.
I find this very intriguing ,if I could raise my voltage to those levels, I would think a self runner is inevitable.
I'm not sure I understand Evo ,your pulsing the middle coil, and the two outside coils are putting out 900 volts?
I do agree ,keep all the bullshit contained to one thread, there's already enough around.
Looking forward to more of your work.
Thanks artv

evostars

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Re: Some Bifilar coil experiments
« Reply #19 on: April 12, 2017, 11:18:05 PM »
Very impressive, thanks for the vid.


The caps load in about 1 sec, that's about 1.6uF * 900sqr /2...about 64 millijoule/s.


Anyway, it would be easier if you used a certain load, such as a 100 Ohm resistor, then you measure amps * volts = watts, and compare it with input watts. It is however an unusual way to step a voltage up. A standing wave does that. From my POV the art of profession would be an automatic frequency adjuster that compensates for the output that usually kills the resonance.


Anyway, interesting stuff.
Thansk dieter.
Yes the resonance needs to keep going. How to drain the caps, without disrupting the ac(topcoil)-dc(2x2 caps)-ac(bottom coil) path?

The energy is not related to the square root of the voltage, but the square of the voltage. the uF needs to be in farads.
11,68V input gives:
E=0,5*0,0000016*900*900=0,65 Joules

when i used 19 volts, it became 1500Vdc
E=0.5*0.0000016*1500*1500=1,8 joules

Speculation from here on: The ratio between voltage in and out is around 77,
So if i would use 55V *77 would produce 4235V
E=0,5*0,0000016*4235*4235=14,35 Joules

110V dc input *77 is 8470V
E=0,5*0.0000016*8470*8470=57,39 Joules

Do you see where this is going? 10x more input voltage, gives 88 times more output energy. (yes speculation, but based on the squared voltage).

A question rises. What about the input amperage?
My setup is far from ideal right now. The IGBT produces short sharp pulses, but, It does so by basically shorting out the power supply over the center coil. and this it does 50% of the frequency. I really need to fix this, before I can make a proper measurement. The Igbt should open and close very shortly. Another challenge to overcome.

Its again a speculation, but I think, to pulse the center coil i need a high voltage, but a relative low current. (like discharging a capacitor)

In the most perfect setup up, the center coil would also be pulsed at its resonant frequency (its not right now).

Far from perfect. but, worth the investigation.

edit: yes the standing wave, is what happens at the resonant frequency.
I like to compare it with water. If water is standing still, the waves apperently move over it(the water just moves up and down).
But when water travels fast, and it moves around a object, a standing wave is produced.
So the ether can move up and down, but with a standing wave, the ether is moving fast.
Now we have 2 coils (upside and downside) with standing waves.
The ether is moving fast, around both coils, at the same frequency.

to me it seems the ether flows, are interacting, producing the quick rise in voltage(pressure) in the caps.








evostars

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Re: Some Bifilar coil experiments
« Reply #20 on: April 12, 2017, 11:33:12 PM »
I'm not sure I understand Evo ,your pulsing the middle coil, and the two outside coils are putting out 900 volts?
Thanks Shylo.

The top coil produces (around) 500V and the bottom coil produces 500V opposite phase.
The probes are connected to the outer rims, of the top and bottom coils.
10x setting. 5V per division around 10 divisions gives 500V peak to peak

MileHigh

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Re: Some Bifilar coil experiments
« Reply #21 on: April 13, 2017, 01:19:55 AM »
I find this very intriguing ,if I could raise my voltage to those levels, I would think a self runner is inevitable.

This has been covered over and over on the forums, I don't even know why I am bothering to post this.

The resonant system is simply storing more and more incremental energy supplied from the power supply.  For each cycle, the power supply adds some incremental amount of energy to the resonant system and the observed peak-to-peak voltage amplitude goes incrementally higher.

Eventually a balance point is reached where the incremental addition of energy per cycle is in balance with the incremental energy lost per cycle and the observed peak-to-peak voltage amplitude stops increasing and reaches a steady state.

There are probably 1000+ web sites that explain this process.

dieter

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Re: Some Bifilar coil experiments
« Reply #22 on: April 13, 2017, 01:40:41 AM »
evostars, you need to get the loading time into the calculation. Your caps cannot deliver 900vdc constantly. This only how high the voltage goes at max. It's the noload voltage.


Again, 900*900=81'000*1.6uF=~128milli *0.5=64 millijoule. How do you get 1.8 Joule?


Anyway, by adding a load such as a 100 ohm resistor, you can calculate the amps based on voltage. If the voltage were 200vdc at the load, then it were 200 vdc / 100 ohm= 2 ampere. And hat would be 200 vdc * 2 amps = 400 Watt.


Then again, your yellow multimeter looks like it has amp section.


Well, it may be relatively easy to autoadjust the frequency to resonance, the sam way tv and radio did it to follow a drifting station. I think it was termed AFC? Raher simple circuit.

dieter

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Re: Some Bifilar coil experiments
« Reply #23 on: April 13, 2017, 01:43:14 AM »
btw sorry bout the typos, my keyboard sucks.

Dog-One

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Re: Some Bifilar coil experiments
« Reply #24 on: April 13, 2017, 04:40:25 AM »
Quote from: evostars
Speculation from here on: The ratio between voltage in and out is around 77

Quite interesting considering the turns ratio is one to one.  At first glance with two coils, one would think 24 volts is about all you would get out of there.  A rather novel form of boost converter you have assembled there Evo.  I'll bet getting that 180 degree phase relationship was tricky to do.  Does it move around when the storage capacitors are charging?

So these coils produce a nice sine wave even though you are injecting a short duration pulse?  What's the approximate duty cycle?


evostars

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Re: Some Bifilar coil experiments
« Reply #25 on: April 13, 2017, 08:12:43 AM »
evostars, you need to get the loading time into the calculation. Your caps cannot deliver 900vdc constantly. This only how high the voltage goes at max. It's the noload voltage.


Again, 900*900=81'000*1.6uF=~128milli *0.5=64 millijoule. How do you get 1.8 Joule?


Anyway, by adding a load such as a 100 ohm resistor, you can calculate the amps based on voltage. If the voltage were 200vdc at the load, then it were 200 vdc / 100 ohm= 2 ampere. And hat would be 200 vdc * 2 amps = 400 Watt.


Then again, your yellow multimeter looks like it has amp section.


Well, it may be relatively easy to autoadjust the frequency to resonance, the sam way tv and radio did it to follow a drifting station. I think it was termed AFC? Raher simple circuit.
oops 900x900=810000 misted a zero
uF is micro farad.  micro is 1/1000000 so 0.0000016F
now calculate again
maybe buy a new keyboard ;)

indeed its unloaded. but it shows the energy potential.and the rise of energy related to the rise in input voltage.
 

evostars

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Re: Some Bifilar coil experiments
« Reply #26 on: April 13, 2017, 03:50:10 PM »
Quite interesting considering the turns ratio is one to one.  At first glance with two coils, one would think 24 volts is about all you would get out of there.  A rather novel form of boost converter you have assembled there Evo.  I'll bet getting that 180 degree phase relationship was tricky to do.  Does it move around when the storage capacitors are charging?

So these coils produce a nice sine wave even though you are injecting a short duration pulse?  What's the approximate duty cycle?


Thanks dog one,
The 180 degree phase shift, happend. when I reversed the coil, and retuned it. I saw the voltage rise in my caps. Then I kept tuning, until i reach maximum voltage. Then the phase was 180 degrees.

yes, a sine wave, from being pulsed.

The power factor is a big question. What is the input power, what is the output power?
In this low voltage setup I'm rather convinced that the input is larger then the output power.

The relation between the input power and output power isnt linear. It needs to reach a certain voltage before it becomes really interesting. Below that voltage, the input is bigger, above that voltage, the output is bigger, due to its realtion to the square of the voltage.

Grumage

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Re: Some Bifilar coil experiments
« Reply #27 on: April 13, 2017, 04:54:58 PM »
Dear evostars.

You could get one of these for your input measurements.

http://www.ebay.co.uk/itm/Digital-LCD-60V-100A-Balance-Voltage-RC-Battery-Power-Analyzer-DC-Watt-Meter-CI-/272291431181?hash=item3f65d5830d

I recently bought one but have not used it in any practical way yet.

Measuring the output will be a whole different " ball game " though.

Cheers Graham.

AlienGrey

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Re: Some Bifilar coil experiments
« Reply #28 on: April 14, 2017, 01:42:56 AM »
Interesting device but no good for RF ;) but ok for the power supply I suppose

cheers anyway AG

evostars

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Re: Some Bifilar coil experiments
« Reply #29 on: April 14, 2017, 04:48:11 PM »
Dear evostars.

You could get one of these for your input measurements.

http://www.ebay.co.uk/itm/Digital-LCD-60V-100A-Balance-Voltage-RC-Battery-Power-Analyzer-DC-Watt-Meter-CI-/272291431181?hash=item3f65d5830d

I recently bought one but have not used it in any practical way yet.

Measuring the output will be a whole different " ball game " though.

Cheers Graham.
Thanks for the advice, looks like a nice piece of gear. but its restricted to 60Vdc
I found a 750uOhm shunt on my igbt driver. maybe i will use that.
But In the end, I think i need a different kind of pulse generator.
Maybe one that can charge a capacitor, and then discharge the capcitor at both ends by switching both ends of the capacitor.
My IGBT driver, now only switches one end (to ground)