How a Tesla Coil Works

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Күн бұрын

Gregory explains how a Tesla Coil works.
The working principle is explained from the Tesla Coil end-result - the creation of big sparks - going backwards to the power electronics stages and how they operate.
A DRSSTC Tesla Coil utilizes a power electronics inverter, feeding a double resonant circuit that converts the low impedance power, creating high voltages sufficient for breaking the dielectric limits of the surrounding air.
The power electronics inverter runs bursts of 1500A over the primary-side resonant tank. Energy is transferred to the secondary-side by inductive coupling. The overall circuit of the Tesla Coil is modeled as a band-pass filter that matches the voltage and current profiles between primary and secondary.
A PFC of the boost topology feeds the inverter DC bust, taking power directly from the 220VAC mains. The quad-phase topology is explained and why the discontinuous mode of operation was chosen.
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00:06 - Intro
01:32 - Tesla Coil basics
07:02 - Tesla Coil electronics modeling
14:04 - IGBT power inverter
22:52 - PFC - Power Factor Correction boost converter

Пікірлер: 47

@AllElectronicsChannel 9 ай бұрын

This video was made possible by Patreon support. Become a Patron at patreon.com/allelectronics

@TheElectronicDilettante 2 ай бұрын

This was the best explanation of DRSSTC I’ve seen. And I’ve been watching a lot of videos looking for this level of information. I’m a soon to be old guy, getting into electronics to keep my brain occupied. I’ve always been fascinated with Tesla Coils and have been attempting to construct my own with varying levels of success/failure. In all your free time, do you think you can visit the topic of the Slayer Exciter Circuit version of a Tesla Coil and the hybrid Solid State , Spark Gap variant? Electronics is a slippery slope, every time I learn something new, I realize how much more I don’t know. You do an excellent job conveying your point and explaining it in a way that demands engagement. Thanks sooo much! I look forward to the rest of your videos!

@sersheva 6 ай бұрын

Very interesting Gregory! please we need a second video about tesla construction and schematics.

@manuelminutello3027 9 ай бұрын

VERY ,VERY informative. great video! i would love to see a sequel about how to run some numbers on tesla coils like secondary estimated resonance frequency and H bridge driver schematic

@franciscoferreira-eh1yu 9 ай бұрын

your vids are really good. You could tell us a little of your history, when your start to getting interested in electronics, how you start to learning it, if you graduate those things... Congrats dude!

@AllElectronicsChannel 9 ай бұрын

Nice!

@leosbagoftricks3732 2 ай бұрын

This is the best video I have ever seen on Tesla coils- how it only has ~2.8k views is beyond comprehension. I have one question about the Boost PFC- how do you charge the capacitors to the initial 325V without massive inrush currents? is there a pre-charge system that cuts out once the initial charge is established?

@AllElectronicsChannel Ай бұрын

Thanks! Yep, I used a pre-charge circuit. Just a contactor with a big series resistor, in the 100 Ohm range.

@steniomedeiros6709 9 ай бұрын

Simply incredible!!! Thank you for sharing so much knowledge and expertise!

@AllElectronicsChannel 9 ай бұрын

🙏🏼🙏🏼

@stephengfazio 7 ай бұрын

I really liked your front to back explanation! I would like to see your build of how you implemented each stage

@iholland 9 ай бұрын

Love your videos. This one was an excellent video and explanation plus clever addition of a PFC in front of the main driver. I would love to see a follow-up video with more detailed schematics and component values used. Thanks.

@klosskopfder1.762 7 ай бұрын

Now I REALLY want to build a tesla coil.👍

@AllElectronicsChannel 7 ай бұрын

You should!

@iceho6460 8 ай бұрын

Thank you for making this video and sharing your knowledge. Stay bless! 🙏

@PeterB396 7 ай бұрын

I totaly agree. A very very informative video. Describing a lot of basic operational principles.

@AllElectronicsChannel 7 ай бұрын

Glad you enjoyed it!

@egonotto4172 9 ай бұрын

Thanks, great explanation.

@antomotivation6604 8 ай бұрын

VERY NICE SIR , IT TOO GOOD

@sFeral Ай бұрын

There needs to be a coil calculator which puts out parameter spectrums/ranges (of interdependent/covariant variables) depending on how many variables you determine/collapse. Coils can look very differently yet show the same frequency. I would've liked to set the frequency and then narrow down on other parameters by setting materially determined (available) parameters like wire radius, top load dimensions to then move on to "turn number", coil circumference. but there's no such calculator available and I'm too slow of a learner to produce it

@therlhes 7 ай бұрын

Grande Grégory! Acompanho seu trabalho desde as aulas de lei de ohm em 2010. Espero um dia ver as universidades adotando livros de sua autoria como referência bibliográfica! Parabéns pelo seu trabalho. Gostaria de fazer seu curso de Rádio FM, mas não está mais disponível, pode voltar a ofertar ele?

@thebread8918 4 ай бұрын

Amazing!! By the way, regarding what you mention that the Tesla coil is a double resonant tank circuit, in that case where would the primary capacitor be found in the Slayer Exciter circuits? It would be good if you talked about those circuits too because I don't usually find information about those seemingly "basic" circuits :(

@AllElectronicsChannel 3 ай бұрын

The Slayer Exciter is closer to a single resonant system! With an untuned primary

@misterhat5823 5 ай бұрын

When discussing the PFC, it looked as if you were describing critical conduction mode and not discontinuous mode.

@AllElectronicsChannel 5 ай бұрын

It's mainly discontinuous. My drawing was not the best 😂

@misterhat5823 5 ай бұрын

@@AllElectronicsChannel Won't going discontinuous vs critical distort the input waveform?

@AllElectronicsChannel 5 ай бұрын

Think distortion comes after critical, right?

@misterhat5823 5 ай бұрын

@@AllElectronicsChannelI was thinking the off time (no inductor current) would vary and cause a non linearity. My simulation shows the same. The peak current is indeed proportional the input voltage, but the average is not because the time the inductor current is at zero varies nonlinearly. Critical conduction mode eliminates the nonlinearity because the inductor current doesn't dwell at zero.

@misterhat5823 5 ай бұрын

When the coil isn't being excited, are all transistors in the H bridge off or do two (such as both bottoms) stay on to let current circulate?

@AllElectronicsChannel 5 ай бұрын

All switches off. The remaining energy of the LC tank is rectified back to the bus by the the bridge diodes.

@misterhat5823 5 ай бұрын

@@AllElectronicsChannel Thanks.

@davidfisk6759 3 ай бұрын

Can you use the tesla coil in reverse. Draw energy from the atmosphere, the energy that forms lightening. Then turn it into manageable current?

@sFeral Ай бұрын

a topology designed specifically for that purpose... something like the Wardenclyffe original design, which wasn't exactly what was built. It was scaled down a bit, but would've probably worked at least as a demonstration, long enough to get attention and more funding