Lineman? This guy is an engineer!

That's such a beautiful system, I'm thoroughly impressed! Thank you for taking the time the explain everything and really show the different parts!

Hats off to you sir. That a work of art

That coil is a beast! Thanks for the run through - wise move on the ballistics lexan - true you don't want bits inside becoming mini missiles :)

Great video. You're clearly a natural and knowledgeable instructor!

Nice build man thanks for sharing

Very well explained !

Wow beuty! gnarly arcs

Excellent presentation. That’s a Big Beautiful Monster. Work safe⚡️

That's a beautiful coil mate😎 and that topload is fantastic... Good work cant wait to see it in person at some point 😁 Steve

thats fenomenal

Very nice👍⚡⚡

keep up the work

Gigacoil new Collab

Genious waw great video congratulation amazing keep up the great work

Why stop at linesman man,electrical engineering.Frickin awesome man!Would have loved to see the r&d testing! Just awesome!

@MegavoltHomeschool

Жыл бұрын

Appreciate the support. Thanks 👍

To calculate the resonance frequency of the filter inductance and C-prim is very simple: the resonance frequency = 1 / (2 PI x SQRT(LC)) The problem is: what is L and C in this case, as there is a HV transformer in between. You can approach this from either side, the HV end or the LV end. Let's take the HV end. On the HV end, C is simply the actual capacitance of C-prim, but what inductance do you see from this end? A low current on this side will translate to a higher current on the other side of the transformer, meaning that more current will flow through the inductance and thus the inductance will show a higher impedance. How much higher? Assuming that your transformers have a 120V primary and 14.4KV secondary, the current on the primary side will be 120x higher. Therefore L in the above equation should be 120 x the inductance of your filter inductors. PS. I ran into this problem myself and it cost me my ceramic primary capacitors. (which still saddens me today, as they were magnificent) PSS: Don't worry too much about insulating the secondary coil. Just wind it tight (windings close together) and tune the circuits at low power.

@MegavoltHomeschool

3 жыл бұрын

I appreciate your input. I already know the resonant frequency. As the coil draws close to 15 KW, it would be insane to run without that knowledge. The primary resonates at approx 50 kHz, and that is the "general resonance frequency" ( which is very close to the natural resonant frequency in this case). I'm more concerned about what the resonance is doing as a function of time. The ballast inductance is approx 11mH, when measured from the low voltage source. It's impedance would be multiplied by the square of the turns ratio, when applied to the high voltage side of the circuit. That would be 3600, as the turns ratio is 60:1. Input voltage for the transformer bank is 240 V and output is 14,400 V. The tank capacitance is 250 nF. The only way to derive a graph of what the current is doing as function of time, is to solve a 2nd order, non-homogeneous differential equation which also includes circuit series resistance. Although R is small, it is not negligible. And that is what complicates things a bit because a decay function becomes associated with the solution... but the current doesn't decay.... it simply rises to a steady state. What I need is a mathematician or physicist to show me how to solve the Diff Eq, as I simply am not capable of doing it on my own. :-)

@WardenclyffeResearch

3 жыл бұрын

@@MegavoltHomeschool Yes, I realised after I commented that you wanted to calculate the max. current, not the frequency. I too don't know how to solve that equation but I am looking for ways to find the answer without solving it, using equations that other bright minds have come up with. The way I see it, there is a resonance between the ballast inductance and the primary caps. The frequency of which can relatively easily be calculated. Next I would calculate the Q factor of this circuit, which takes the internal resistances into account and thus determines how high the resonance could rise. But, to be honest, when I ran into this problem I ended up modelling my circuit in NGSPICE and running a couple of simulations.

Hi, have you considered using a three phase motor controlled by a frequency drive?

@MegavoltHomeschool

Жыл бұрын

Great question. The tank caps are fully charged every 8.33 ms. This charging is synchronized with the frequency of the source voltage. In this case, ohmega = 2π60, or 377. With a synchronous firing system, discharging the energy in the tank caps MUST be in absolute lock step with the source voltage. In theory, as long as a VFD could EXACTLY control the speed of the motor, and keep it EXACTLY synchronous with the charging cycle , it would be possible. But, it is highly unlikely this would be maintainable for any appreciable time period, at least with any degree of accuracy. VFD's first rectify the source voltage sinusoid into a DC signal, before converting it back into AC. Any discrepancy, whatsoever, regarding the synchronicity of the charging sinusoid and the motor sinusoid would result in an escalating degree of error. And that error would very quickly cause the relationship between the motor and the caps to become non functional. The stability of the driving frequency is, in fact, so critical, that even using a portable generator to power the system is almost impossible. The driving frequency must be absolutely stable to within a few microseconds, such that the charging/firing cycle functions correctly.

@alexissmith1713

Жыл бұрын

@@MegavoltHomeschool Then a stepper motor and controller of the appropriate horsepower would be king. They can resolve to fractions of an rpm. Just more expensive!

@MegavoltHomeschool

Жыл бұрын

@@alexissmith1713 @Alexis Smith I still think it would be bit like using two pendulums to hold time over the course of 2 minutes, to an accuracy of a few nanometers. At that level, it would be more logical to power both the motor AND the caps off the same VFD. In that regard, the synchronicity between the two would be explicitly defined from the same source. Guaranteed. That would also provide the possibility of a dynamic break rate, because varying motor speed would be in lock step with the charging cycle. However, the reactance of the caps would then become dynamic, which would unstabilize their resonance with the ballast inductors. But, it does provide an interesting thought experiment... 🙂

Nice coil but at this point it would be easier and cheaper to just built a DRSSTC that size. And it could also play music.

Spark gap coils are og.

Hi sar,,, I have one qestion.. How much kva is rated of your 14 kilovolt transformer??

@MegavoltHomeschool

Жыл бұрын

The transformers are instrument p.t.'s. They do not have a direct kva rating. Instead, they have a "thermal burden". This gives a value for the amount of va that can move through the transformer before internal heating causes enough voltage drop, such that instrument operation (metering) becomes unreliable. I believe each transformer in this bank has a thermal burden of 1kva.

@tahmidadib5142

Жыл бұрын

@@MegavoltHomeschool Ok sar,,thanks,, Sir, I want to make a tesla coil. Before that, I need to make the high voltage transformer. And, the primary voltage of the transformer will be 220 volts, the secondary voltage will be about 15kilovolt. But, my question is how much current should be at 15kilovolt?

@MegavoltHomeschool

Жыл бұрын

@@tahmidadib5142 that really depends on what type of coil you want to build and how powerful you want it to be. If you are planning to make an asynchronous spark gap, I would expect less than an amp at the hv side. This coil runs synchronous. It uses resonance to "boost" voltage across the cap to ~30kv. At that voltage, the caps supply about 15.5kw to the tank circuit. That put the current draw well above 1 amp

@tahmidadib5142

Жыл бұрын

@@MegavoltHomeschool Ok sar... Thank you very much..

I have to have help to shut off a nanotech bmi mkultra implanted at Omaha nebraskaunmc please help!!!

Man I’m 22 from NY. I’ll pay you and pay my motel and flight just for u to teach me how to make one better yet how to understand it. name ur price I want a teacher

instead of buying a new motor you could've used a variac to control the speed, but nice job on this