Author Topic: Proper capacitance size  (Read 551 times)

Offline BibberCoils

  • High Voltage Enthusiast
  • *
  • Posts: 1
  • Karma: +0/-0
    • View Profile
Proper capacitance size
« on: October 31, 2024, 06:46:32 PM »
Hello new member here, recently I've gotten into coiling and my next venter is going to be a 8" 2250kva coil, generally I'm going for size thinking a 5:1 ratio for hight, rotarySG. Here's where I'm a bit confused with the planning the capacitance values recommened on deepfriedneon vastly different from whats recommened on teslamap so im curious if a 68nf tank would be adequate?

Offline Hysteresis

  • High Voltage Enthusiast
  • *
  • Posts: 26
  • Karma: +1/-0
    • View Profile
Re: Proper capacitance size
« Reply #1 on: October 31, 2024, 09:34:24 PM »
My big coil is 6KVA, 8 inches and I'm using 70nF. You can't mean 225kva, maybe 2.25Kva? I'm using PTs not NSTs they are different. Hope this helps.

Offline Benjamin Lockhart

  • High Voltage Technician
  • ***
  • Posts: 145
  • Karma: +15/-0
    • View Profile
Re: Proper capacitance size
« Reply #2 on: October 31, 2024, 09:54:55 PM »
The tank cap size depends on the voltage and current your power supply puts out.
Also if you use a synchronous rotary gap, a larger that resonant value is ideal.

Deep fried neon gives you the resonant value to match the transformer. However if you use an asynchronous rotary gap, don't use this resonant value because the resonant voltage rise could kill the transformer. I think a smaller than resonant value is ideal for that.

Offline MRMILSTAR

  • High Voltage Senior
  • *****
  • Posts: 580
  • Karma: +21/-0
  • Cedar Rapids, Iowa
    • View Profile
Re: Proper capacitance size
« Reply #3 on: November 01, 2024, 04:16:16 AM »
I have a 8.5" SGTC with a synchronous RSG running at 3600 RPM at 240 PPS. My power supply is a pole transformer. I am currently pulling about 6 kVA. My capacitance is 45 nF. The maximum capacitance that you can effectively use is determined by the maximum current that your transformer can deliver. I have always used JAVATC to design the coil. JAVATC has an output which shows the percent charge on the capacitor per bang. To get the most out of your capacitor you want that value to be close to 100%. I think mine is currently about 90%.
Steve White
Cedar Rapids, Iowa
Retired electrical engineer

High Voltage Forum

Re: Proper capacitance size
« Reply #3 on: November 01, 2024, 04:16:16 AM »

 


* Recent Topics and Posts

post Re: im new to tesla coils and i think i screwed up
[Spark Gap Tesla Coils (SGTC)]
davekni
Today at 09:09:38 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
haversin
Today at 08:45:14 PM
post im new to tesla coils and i think i screwed up
[Spark Gap Tesla Coils (SGTC)]
noahbmaker
Today at 08:04:14 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
alan sailer
Today at 07:47:52 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
Uspring
Today at 07:34:38 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
haversin
Today at 05:48:16 PM
post Re: Big Coil Build Log
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
Today at 03:20:08 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
Uspring
Today at 01:50:30 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
shBLOCK
Today at 07:39:21 AM
post Re: First DRSSTC, Full Bridge PCB & IGBT Selection question.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
Today at 04:14:03 AM
post Re: First DRSSTC, Full Bridge PCB & IGBT Selection question.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
Today at 01:12:38 AM
post Re: Testing and teardown of a commercial induction heater
[Electronic Circuits]
dejuli2
December 11, 2024, 09:58:07 PM
post Re: Push Pull VTTC
[Vacuum Tube Tesla Coils (VTTC)]
myoniwy
December 11, 2024, 09:26:40 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
myoniwy
December 11, 2024, 09:08:24 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
haversin
December 11, 2024, 08:05:20 PM
post Re: First DRSSTC, Full Bridge PCB & IGBT Selection question.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Beggernator.
December 11, 2024, 03:48:40 PM
post Re: APC Back-UPS Pro 1500 Watt Teardown
[Electronic Circuits]
Mr.Cas
December 11, 2024, 05:27:48 AM
post Re: First DRSSTC, Full Bridge PCB & IGBT Selection question.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
December 11, 2024, 01:41:52 AM
post Re: First DRSSTC, Full Bridge PCB & IGBT Selection question.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Beggernator.
December 10, 2024, 04:18:23 PM
post Re: Ferrite transformer from Microwave
[Transformer (Ferrite Core)]
davekni
December 10, 2024, 04:05:07 AM
post Attracting (and picking up) nonferrous metals with an electromagnet
[Electronic Circuits]
davekni
December 10, 2024, 02:49:03 AM
post Ferrite transformer from Microwave
[Transformer (Ferrite Core)]
Simranjit
December 09, 2024, 11:37:35 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
alan sailer
December 07, 2024, 09:41:37 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
haversin
December 07, 2024, 07:07:49 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
alan sailer
December 07, 2024, 06:33:32 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
haversin
December 07, 2024, 06:13:56 PM
post Re: Measuring the coherence length of a laser
[Light, Lasers and Optics]
alan sailer
December 07, 2024, 02:40:55 AM
post Measuring the coherence length of a laser
[Light, Lasers and Optics]
haversin
December 07, 2024, 01:07:46 AM
post Re: Single board for SSTC and DRSSTC operation
[Solid State Tesla Coils (SSTC)]
davekni
December 07, 2024, 12:18:49 AM
post Re: Single board for SSTC and DRSSTC operation
[Solid State Tesla Coils (SSTC)]
Simranjit
December 06, 2024, 11:59:05 PM
post Re: First DRSSTC, Full Bridge PCB & IGBT Selection question.
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
December 06, 2024, 11:33:05 PM
post Re: Single board for SSTC and DRSSTC operation
[Solid State Tesla Coils (SSTC)]
davekni
December 06, 2024, 11:28:25 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
GaelJaton
December 06, 2024, 09:47:04 PM

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 
SimplePortal 2.3.6 © 2008-2014, SimplePortal