coil capacitor using voltage and current impulses

Apoc4lypse

Re: coil capacitor using voltage and current impulses
« Reply #650,  »
Yeah I've noticed inconsistencies with chat gpt and sometimes it just flat out refuses to touch on certain topics (high power) because it deems it as dangerous and unsafe.

evostars

Re: coil capacitor using voltage and current impulses
« Reply #651,  »
Quote from Apoc4lypse on January 13th, 2024, 05:08 PM
Yeah I've noticed inconsistencies with chat gpt and sometimes it just flat out refuses to touch on certain topics (high power) because it deems it as dangerous and unsafe.
I understand Grok (on X), the AI developed by Elon Musk will not be censored. fingers crossed


evostars

Re: coil capacitor using voltage and current impulses
« Reply #653,  »
while waiting on the hv transformers,
I am thinking of ways to use my lower voltage dc generators.

create one plate with high +voltage 700
the other plate with a lower +voltage 100 that is swichable to ground.

the sudden change from 100 to 0,
gives an increase of charge on 700 to 800V
which demands an inflow of current that is larger then the 100v discharge.

if the 100V plate is a coil with parallel capacitor it should be able to become amplified resonant from this large inflow of displacement current.

thus now a sine wave voltage is added to the 100V dc. this will cause a problem for the 700V plate. which is dc but now also wants to be ac.
so lets also make that a coil and allow it to be series resonant at the same frequency.

this quickly becomes complex.

I could use a silver plated coax, wound as a coil. with a parallel capacitor over the inner wire, and a series capacitor connected to the shield
allowing them to be series and parallel resonant at the same frequency.

100V to ground with a mosfet.
while the dc 100v source is protected by a choke. which is prevented to become resonant by a coupled choke to ground with diode for negative voltage.

interesting.
but... relatively low voltages. so the discharge should be very very quick. my parallel mosfets can handle this.

it would be a nice teaching device.
but I must connect the isolated dc dc converter s to make this work.



evostars

Re: coil capacitor using voltage and current impulses
« Reply #655,  »
I made a dual isolated dc supply.
I put in 470 uf and it is the max load.

my HV dc supply also has an inout cap of 470uF so... that makes the total 940uF which is to much.

the output shouldnbe 25V but isnt when loaded.

when dc is straight connect then 12V 30ma so no problem.

but my dual out put high dc is dead. it gives no volts out.

so sadly... this wont work. but is still have another device

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evostars

Re: coil capacitor using voltage and current impulses
« Reply #656,  »
I can make the single output and make it into a dual output. just needs the cap and diode plus some bleed resistors. and the output socket.

I can use parts from the broken dual output.
also have another module that maybe could work.

I just need to remove the large 470uF input capacitor, then the isolated dc might work

evostars

Re: coil capacitor using voltage and current impulses
« Reply #657,  »
I now have 430V on the dual output
it isnt balanced on the output. somehow the negative is much lower. but it works

and I have got it working with the isolated dc dc converter so that is great!

the other high voltage dc circuit can be run without isolation as it can be earth grounded.

positive will then connect to the negative of the isolated HV.

evostars

Re: coil capacitor using voltage and current impulses
« Reply #658,  »
I could evem parallel the outputs of the 2 isolated dc converters to get 12W.

I needed to up the current supply. somehow I made the filter but still there are current peaks feedimg backninto the psu it seems.

evostars

Re: coil capacitor using voltage and current impulses
« Reply #659,  »
I hooked up the 12V inputs to the psu
and connected the positive HV dc
to the negative HV dc of the other.

somehow the isolated dc dc converter didn't like that, and didn't give output any more.

maybe the other cheap circuit produces to much noise on the psu side. I bet it has no filter. so... raise the current of the psu
fingers crossed


evostars

Re: coil capacitor using voltage and current impulses
« Reply #661,  »
I wonder if a single ferrite rod gives a faster impulse with a joule thief circuit.

the magnetic field is not close looped as with a toroid. the hysteresis of a closed loop shoupd be higher, so an open rod should not have as much hysteresis and thus should allow more current change when the magnetic field collapses.

in the other hand. the slowness us also caused by the transistor that is saturated, and to close first needs to remove the stored charge.

but this is a fast transistor up to 30mhz so the core might speed it up if it is open.

even a small gap could speed the current up.

evostars

Re: coil capacitor using voltage and current impulses
« Reply #662,  »
this coil is made of coax cable witch is silver plated.
it measures a bit less than 2.4nF between the core and mantle.

the inner core has an inductance of 230uH at 10kc/s and 223 uH at 100kc/s

the outer core has 2.12 uH with high Q at 100kc/s
and 216uH @ 10kcps

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evostars

resonant impedance transformation
« Reply #664,  »
within the resonant sine wave, the impedance is constantly transformimg from high to low.
the high and low states are 90 degrees phase shifted.

so if 2 resonant systems are 90 degrees phase shifted, one is low impedance (allowimg energy to flow) while the other is high impedance (resisting energy flow)

so the 90 degrees phase shifted low resistance system allows high currents (low impedance) while the other high resistance system allows high voltages.

For this is the rule:
if you need high voltage, you will have high impedance.
if you need high currents, you will need low impedance.


evostars

positive or negative 90 degrees phase shift
« Reply #665,  »
So I should switch at the voltage maximum
but positive or negative?

well my current coil is positive, and switches to zero. so this should give an imcrease in voltage. thus the voltage should be maximum positive when switching.

maybe the right question then is, will the positive voltage be accompanied with a positive current, or a negative current?

in other words is the current positive 90 or negative 90 degrees phase shifted vs the voltage coil?

I Say negative current means negative resistance, and thus creates a current outwards. which then transforms in ti the positive high voltage.

so a negative 90 degrees phase shift.
but I can only delay, so 270 degrees.

this explains what I already saw.
I had problems with tuning into the + 90 degrees phaseshift.
no current. large oscillations. no high voltage.
and most importantly, the phase AUTOMATICALLY shifted to - 90 degrees.

I didn't understand why and how.

it is because - 90 is the natural flow.

the displacement current and magnetic current should be both flowing in the right direction (opposing).
the current coils magnetic field is then amplified by the displacement current of the coil capacitor.
the displacement is flowing from positive to to negative, so into the current coil. out of the voltage coil.

while the magnetic current flows out of the current coil (at one end) and into the current coil (at the other end)

that is also why you can have 2 switch points, but the 2 swirches must connect to the ends of the 2 current coils. because north and south alternate.

evostars

Re: coil capacitor using voltage and current impulses
« Reply #666,  »
so I need a 270 degree phase shift if yhr current whichnis equal. to - 90 degrees
which means I switch at the positive voltage maximum.

And I tried at the negative maximum which naturally didn't work because the current flow was oppositing the natural flow.

this is so confusing...
because displacement current and magnetic current are naturally opposing.


evostars

Re: coil capacitor using voltage and current impulses
« Reply #668,  »
I gave my HV joule thief 2x5 turns of 1.5mm diameter wire, and tuned the base resistor to 2k9
the High voltage side gave ozone, but fairly small  sparks to ground, only 2mm or something like that.
So the turns ratio is to low.
I used a 12V battery, but I  can increase the voltage further. but dont want to.
I better use a different HV secondary coil.

green is the base purple is the collector of the joule thief primary
2.9V on the base is good (5v max, 0.5v turn on)

collector only gives 27V and is very slow, not a spike. So this makes the secondary into a AC wave again, instead of a dc spike.

highest voltage would be when the secondary was pulsed at a harmonic of the res frequency. but for that I would need a tunable primary.

joule thief is now resonant at 41.87kc/s

I placed tape between the two core halves


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evostars

fail
« Reply #670,  »
nope it doesnt work.

I have a probed 9.3kV pp Which should have some effect.
but no currents flowing in from ground.
without the probe, the voltage would even be higher. this should have worked at least a bit. but it doesn't

back to square one.
learned a lot. will produce videos

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evostars

Re: coil capacitor using voltage and current impulses
« Reply #671,  »
ok lets continue on a different path.

Can displacement current, amplify the current in a parallel resonant coil, that acts as a capacitor plate.
yes, I already saw that in my last video. but I need to change that setup a bit.

can a series resonant high voltage, combined with a parallel resonant voltage produce real power in a third coil in the middle.

or...
produce videos. yes it is time for that.
explain what I learned.
maybe without experimental proof. but just giving the insights, into reactance and the resonant reactance.


evostars

resoant Reactance
« Reply #672,  »
reactance seems constant as a function of frequency.
but for a given frequency there is a period of time where the energy flows back and forth between charging and discharging the coil inductance and capacitor capacitance.

so within the period reactance is not constant.
the capacitive and inductive reactances are equal but opposite in polarity, because one is charging while the other is discharing.

the reactances vary between infinite and zero, so they are not as a sine wave but more like the added graph. (bottom part of the Xl is cut off)

so with 2 resonant systems that are 180 degrees out of phase, the reactances will be equal in amplitude AND polarity, giving a half period where the total reactance is NEGATIVE.

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evostars

2 high voltage capacitors 20pF
« Reply #673,  »
I made 2 high voltage capacitors.
2 pvc tubes that fit inside eachother.
copper tape on both, 2x
wired up.
paper tape, to keep the inner one centered.

18 pF. at 10kc/s measured
 still high more distance would have been better, or more air.
but it is what it is

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evostars

!Resonant reactances!
« Reply #674,  »
finally I am able to fully understand the resonant reactances of the coil and capacitor, which constantly exchange energy.

For those who understand this graph , please PM me

When the capacitor is charging the coil,
Then the capacitive reactance Xc is negative, and the coils inductive reactance Xl is positive.
And in reverse when the coil is charging the capacitor, the capacitive reactance Xc is positive, and inductive reactance Xl is negative.
Polarity of reactance depends on inflow or outflow of electric energy.

Reactance are always equal in size, but opposing in polarity, within a single resonant system.

V in red is the voltage potential of the system (the dielectric field)
Id (blue)is the displacement current flowing between the capacitor plates.
Im (green) is the magnetic current flowing around the coil

Zero currents, max volts= infinite reactance
Max currents, zero volts=zero reactance
voltage and currents are always limited by pure resistance of the system.

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