Author Topic: Building of my first tesla coil  (Read 3588 times)

Offline Skylex86

  • High Voltage Enthusiast
  • *
  • Posts: 16
  • Karma: +0/-0
    • View Profile
Re: Building of my first tesla coil
« Reply #20 on: May 06, 2019, 01:06:08 AM »
Hello everyone

I'm back after a few months of absence
I have made some progress on my DRSSTC project, I received all the components for the management cards.
I finished putting them together this weekend.



I also found a large capacitor



the support of the primary coil has been painted
I got a metal box to store the control cards, in addition to the fence that will be put all around it 

I still have some measurements to make, in particular the inductance of the primary coil to be able to calculate the value of the resonant tank capacitor and also soldered the interrupter (It's the same as the one onetesla TS).

a quick question:
can we test the control board without the high power part ?

Alexis
« Last Edit: May 06, 2019, 01:08:08 AM by Skylex86 »

Offline Mads Barnkob

  • Administrator
  • High Voltage Expert
  • *****
  • Posts: 1179
  • Karma: +17/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: Building of my first tesla coil
« Reply #21 on: May 11, 2019, 08:27:56 PM »
Good to see your progressing well with your coil and I love your home-etched boards, looks just like mine :)

A word of advise on the zipties on the primary, if your primary coil heats up zipties are very easily loosing up and the little tap will let go, perhaps shorting out a few turns of your primary coil. So be sure to watch the temperature of it or you could fasten the turns with stiff copper wire, you have enough space to avoid short circuits from that.

You do not really need to do measurements of your primary inductance, JavaTC is so close to reality that you can just plot your dimensions into that: http://www.classictesla.com/java/javatc/javatc.html

You can test the UD without power on the bridge, but you need to "fake" the feedback. Use a signal generator to feed a sine wave into the rectifier diodes of the feedback input. You can use a power supply for the OCD voltage level, just inject it after the diodes, or use a 2nd signal generator if you have one.
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline Skylex86

  • High Voltage Enthusiast
  • *
  • Posts: 16
  • Karma: +0/-0
    • View Profile
Re: Building of my first tesla coil
« Reply #22 on: June 26, 2019, 07:06:43 PM »
Hello

Well, it's not moving very fast for the moment but it's going to change !
I'm finally on holidays !
I receive my function generator next Monday or Tuesday.
today I made the rolling base of the tesla :



tomorrow she's going to paint.

I have one more question about IGBTs
I found a 5SNS 0300U120100, not very expensive and not far from home
what do you think of this IGBT module ?

Here are the Datasheets :
https://datasheetspdf.com//pdf-down/5/S/N/5SNS0300U120100-ABB.pdf


Thank you in advance for your answers.
Alexis

Offline Mads Barnkob

  • Administrator
  • High Voltage Expert
  • *****
  • Posts: 1179
  • Karma: +17/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: Building of my first tesla coil
« Reply #23 on: June 27, 2019, 10:08:25 AM »
Do not worry about time flying, some of my coils took years to finish :)

Those ABB 3-phase IGBT bricks would have to be used as half-bridge bricks where you drive en 3 half-bridges in parallel and combine the output terminals, both for making a half-brigde and two of them for a full-bridge. Their switching speed is fair for maximum 150kHz (I did not check heat dissipation! Just looked at the times), it has a good high pulse current rating and short-circuit rating, but BUT, there is always a but. The gate charge is really large and it will require much more from your driver, so you have to check your 24VDC rail on the driver and see if its sagging, you might have to add a more powerful external gate drive voltage power supply instead of a 24V 1A regulator. http://kaizerpowerelectronics.dk/calculators/igbt-gate-drive-calculator/

Your control box is looking good, what kind of safety features did you put in it? I see emergency stop and what does the switches and lamps do?
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline Skylex86

  • High Voltage Enthusiast
  • *
  • Posts: 16
  • Karma: +0/-0
    • View Profile
Re: Building of my first tesla coil
« Reply #24 on: June 27, 2019, 10:40:48 AM »
Hello Mads

If the only problem is that they consume a little more than the others, I make them eat differently
unless the rev 1.3 card is not able to support the required intensity

What do you mean by:I did not check heat dissipation ?

according to the datasheets I would have 960w to dissipate 
Total power dissipation Ptot Th = 25 °C, per switch (IGBT) 960 W

Offline Mads Barnkob

  • Administrator
  • High Voltage Expert
  • *****
  • Posts: 1179
  • Karma: +17/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: Building of my first tesla coil
« Reply #25 on: June 27, 2019, 02:43:57 PM »
With 6 gates in parallel, for a full-bridge, you would need atleast 10Apeak driving power and 0,144A average driving power, you risk having sagging 24V from that heavy load, so beef the 24V rail up with larger lytics, but I also think you need something larger than a 24V 1A linear regulator.

All datasheet parameters are given for hardswitching in a regular inverter type of application, like a motor drive.

A DRSSTC utilizes softswitching/resonant switching to handle the much higher peak currents we need for spark generation in a very short time.

You need to calculate the Fmax2 value and you can follow my guide here on how to do it: http://kaizerpowerelectronics.dk/tesla-coils/drsstc-design-guide/igbts/

Just remember there is a lot of assumptions and it is worst case scenarios, so you can tweak some of the values of derate them even  further, it all just comes at the cost of lessened life time of your components :)
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline Skylex86

  • High Voltage Enthusiast
  • *
  • Posts: 16
  • Karma: +0/-0
    • View Profile
Re: Building of my first tesla coil
« Reply #26 on: July 01, 2019, 06:03:33 PM »
Quote
Your control box is looking good, what kind of safety features did you put in it? I see emergency stop and what does the switches and lamps do?

The lamps are used to know which safety is activated (When there is just the power supply connected the green light is on, if the circuit-breaker is passing through then the orange light comes on and if the electromechanical contactor is also passing through the red light comes on).
Moreover it is impossible to turn it on without a key

The rest is used by interrupter (the screen and the red buttons).
I'm programming the atmega of the interrupter


I calculated gate charge :

but I couldn't find gate resistor int

I also tried to calculate Fmax2,but I couldn't find RθJC, Pcond

But i compared the CM600DU-24NF with the 5SNS
I compared the CM600DU-24NF with the 5SNS
The 5SNS takes less time to activate and deactivate, Total power dissipation is much higher for the CM600

I also measured the inductance of my primary coil, I am at 7µH. Then I calculated it with JAVATC and it shows me 7.28µH
So I will start on 7µH and take access to the capacitor to be able to tune it between 6.5 and 7.5µ


otherwise the trolley has been painted, it already looks better  :D
« Last Edit: July 01, 2019, 07:34:47 PM by Skylex86 »

High Voltage Forum

Re: Building of my first tesla coil
« Reply #26 on: July 01, 2019, 06:03:33 PM »

 


* Recent Topics and Posts

post Re: My first DRSSTC on bricks
[Dual Resonant Solid State Tesla coils]
Laci
Today at 08:35:24 PM
post Re: How To Make a Stencil For Spray Paint With Cheap Hand Tools
[General chatting]
johnf
Today at 07:53:35 PM
post Re: Duty cycle when driving a CRT TV flyback transformer
[Transformer (ferrite core)]
John123
Today at 02:52:58 PM
post Re: Royer oscillator (ZVS) driven Jacob's ladder, E80 core transformer
[Transformer (ferrite core)]
John123
Today at 02:42:19 PM
post Re: Full bridge much "weaker" than half bridge?
[Solid state Tesla coils]
nick
Today at 11:17:36 AM
post Re: Royer oscillator (ZVS) driven Jacob's ladder, E80 core transformer
[Transformer (ferrite core)]
davekni
Today at 04:51:08 AM
post Re: Duty cycle when driving a CRT TV flyback transformer
[Transformer (ferrite core)]
davekni
Today at 04:26:22 AM
post Re: How To Make a Stencil For Spray Paint With Cheap Hand Tools
[General chatting]
AndreiRS
Today at 01:21:35 AM
post Re: Using same winding on separate rails?
[Transformer (iron core)]
Twospoons
December 11, 2019, 10:49:04 PM
post Re: A dynamical arc model v2
[Dual Resonant Solid State Tesla coils]
Uspring
December 11, 2019, 05:28:46 PM
post Re: Full bridge much "weaker" than half bridge?
[Solid state Tesla coils]
Fumeaux
December 11, 2019, 03:11:42 PM
post Re: Royer oscillator (ZVS) driven Jacob's ladder, E80 core transformer
[Transformer (ferrite core)]
John123
December 11, 2019, 02:22:10 PM
post Re: Duty cycle when driving a CRT TV flyback transformer
[Transformer (ferrite core)]
John123
December 11, 2019, 02:09:19 PM
post Full bridge much "weaker" than half bridge?
[Solid state Tesla coils]
nick
December 11, 2019, 01:10:57 PM
post Re: Possible use for large inductor (laminated core)
[Transformer (iron core)]
kamelryttarn
December 11, 2019, 08:48:36 AM
post Re: SGTC MK1 - An Accomplishment in Progress
[Spark gap Tesla coils]
davekni
December 11, 2019, 06:08:48 AM
post Re: SSTC low voltage at gate transformer and heating drivers
[Solid state Tesla coils]
davekni
December 11, 2019, 05:38:17 AM
post Re: Duty cycle when driving a CRT TV flyback transformer
[Transformer (ferrite core)]
davekni
December 11, 2019, 05:01:31 AM
post Re: Using same winding on separate rails?
[Transformer (iron core)]
John123
December 11, 2019, 01:52:43 AM
post Re: Using same winding on separate rails?
[Transformer (iron core)]
klugesmith
December 11, 2019, 01:41:04 AM
post Re: Worlds Weirdest Microwave Oven, From A Weapons Factory - The Husqvarna Cupol
[Transformer (iron core)]
klugesmith
December 11, 2019, 01:37:13 AM
post Re: Using same winding on separate rails?
[Transformer (iron core)]
John123
December 11, 2019, 01:19:58 AM
post Re: SGTC MK1 - An Accomplishment in Progress
[Spark gap Tesla coils]
jturnerkc
December 11, 2019, 01:14:32 AM
post Re: Using same winding on separate rails?
[Transformer (iron core)]
klugesmith
December 11, 2019, 01:04:08 AM
post Re: SSTC low voltage at gate transformer and heating drivers
[Solid state Tesla coils]
babass
December 10, 2019, 11:24:50 PM
post Using same winding on separate rails?
[Transformer (iron core)]
John123
December 10, 2019, 10:52:50 PM
post Re: Duty cycle when driving a CRT TV flyback transformer
[Transformer (ferrite core)]
John123
December 10, 2019, 03:35:40 PM
post Re: Why did 4HV die??
[General chatting]
John123
December 10, 2019, 03:21:07 PM
post Re: Duty cycle when driving a CRT TV flyback transformer
[Transformer (ferrite core)]
Mads Barnkob
December 10, 2019, 03:04:28 PM
post Re: Duty cycle when driving a CRT TV flyback transformer
[Transformer (ferrite core)]
John123
December 10, 2019, 02:57:45 PM
post Re: Possible use for large inductor (laminated core)
[Transformer (iron core)]
kamelryttarn
December 10, 2019, 11:23:48 AM
post Re: SGTC MK1 - An Accomplishment in Progress
[Spark gap Tesla coils]
Mads Barnkob
December 10, 2019, 10:27:54 AM
post Re: Worlds Weirdest Microwave Oven, From A Weapons Factory - The Husqvarna Cupol
[Transformer (iron core)]
Mads Barnkob
December 10, 2019, 10:20:17 AM
post Re: Possible use for large inductor (laminated core)
[Transformer (iron core)]
Mads Barnkob
December 10, 2019, 10:16:32 AM
post Re: SGTC MK1 - An Accomplishment in Progress
[Spark gap Tesla coils]
davekni
December 10, 2019, 06:04:28 AM
post Re: Duty cycle when driving a CRT TV flyback transformer
[Transformer (ferrite core)]
davekni
December 10, 2019, 05:28:54 AM
post Re: Possible use for large inductor (laminated core)
[Transformer (iron core)]
davekni
December 10, 2019, 04:12:29 AM
post Duty cycle when driving a CRT TV flyback transformer
[Transformer (ferrite core)]
John123
December 09, 2019, 10:52:59 PM
post Replacement guide for Windows Media Center
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
MRMILSTAR
December 09, 2019, 08:29:16 PM
post Re: Sense coil fabrication?
[Induction launchers, coil guns and rails guns]
Uspring
December 09, 2019, 04:23:33 PM
post Re: Possible use for large inductor (laminated core)
[Transformer (iron core)]
MRMILSTAR
December 09, 2019, 03:59:02 PM
post Re: SGTC MK1 - An Accomplishment in Progress
[Spark gap Tesla coils]
jturnerkc
December 09, 2019, 03:41:42 PM
post Possible use for large inductor (laminated core)
[Transformer (iron core)]
kamelryttarn
December 09, 2019, 09:43:11 AM
post Re: SGTC MK1 - An Accomplishment in Progress
[Spark gap Tesla coils]
davekni
December 09, 2019, 12:53:57 AM
post Re: CW multiplier resistor string suggestions
[Voltage Multipliers]
davekni
December 08, 2019, 09:57:51 PM
post Re: CW multiplier resistor string suggestions
[Voltage Multipliers]
MRMILSTAR
December 08, 2019, 05:28:09 PM
post Aethra CCD Webcam Teardown - From Back When Streaming Was Expensive!
[Electronic circuits]
Mads Barnkob
December 08, 2019, 01:33:30 PM
post Platter resistance & inductance
[Induction launchers, coil guns and rails guns]
klugesmith
December 08, 2019, 11:41:00 AM
post Re: CW multiplier resistor string suggestions
[Voltage Multipliers]
davekni
December 08, 2019, 06:50:11 AM
post Re: CW multiplier resistor string suggestions
[Voltage Multipliers]
plasma
December 08, 2019, 12:00:00 AM

Sitemap 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30