Author Topic: First time DRSSTC Build  (Read 2584 times)

Offline Saattvik24

  • High Voltage Enthusiast
  • *
  • Posts: 12
  • Karma: +0/-0
    • View Profile
First time DRSSTC Build
« on: January 23, 2024, 05:32:39 PM »
I am attempting to build a DRSSTC for the first time, having built a small half bridge SSTC before. After having gone through many resources and forums and using JavaTC and other calculators, I have chosen the following parts and specifications for the DRSSTC, I wanted to know if I have chosen them correctly and just needed some feedback before ordering the parts. Thank you.

Bridge - SKM100GB12T4 in Full Bridge
Bridge Supply - 0-260VAC, 35A Bridge Rectifier, 4700uF 400V EPCOS Electrolytic Capacitor (ESR - 28mohm, Ripple Current - 12.6A)
Primary Coil - Spiral Primary - 6 turns of 1/4 inch OD copper tube with 15mm spacing and an Inner diameter of 150mm
Secondary Coil - 110mm diameter, 513mm long, 1600 turns, 28AWG enameled copper wire
MMC - 2 strings in parallel of 2 in series of Cornell Dubilier 942C20P15K-F for 0.15uF at 2000VDC
Snubber - 2uF 1kVDC 827V/us dv/dt (KEMET C4BSNBX4200ZBLJ)
Top Load - Toroid -  Minor Diameter-127mm   Major Diameter-530mm   Capacitance-22.951pF
Driver - UD2.7C Thru Hole
Resonant Frequency - Around 130kHz
« Last Edit: January 23, 2024, 05:36:44 PM by Saattvik24 »

Offline AstRii

  • High Voltage Engineer
  • ****
  • Posts: 256
  • Karma: +7/-0
  • Czech Technical University in Prague
    • View Profile
    • UHVlab - Tesla Coils | High Voltage | Education
Re: First time DRSSTC Build
« Reply #1 on: January 23, 2024, 08:20:03 PM »
Quote
MMC - 2 strings in parallel of 2 in series of Cornell Dubilier 942C20P15K-F for 0.15uF at 2000VDC

Is that 2000VDC a typo? I found those caps to be individually rated for 2kV, giving 4kV for 2 in series. Anyway 4kVDC still seems quite low. I assume those bricks could be easily pushed to 500A-700A OCD, which would result to 4080V - 5700V AC on your capacitors at 130kHz. I would put at least 4 in series if your build needs to be reliable.
Bc. Marek Novotny
Czech Republic, Czech Technical University in Prague
www.uhvlab.org

Offline Saattvik24

  • High Voltage Enthusiast
  • *
  • Posts: 12
  • Karma: +0/-0
    • View Profile
Re: First time DRSSTC Build
« Reply #2 on: January 24, 2024, 08:48:09 AM »
Yes sorry that was a typo. oneKone who built a skm100 coil which is in the list of drsstc builds here, he used a 165nF 6kv kemet snubber capacitor mmc, so should I go the same route as him or stay with the cornell dubilier capacitors? The kemet snubbers will be much cheaper, so I would prefer that.

Offline AstRii

  • High Voltage Engineer
  • ****
  • Posts: 256
  • Karma: +7/-0
  • Czech Technical University in Prague
    • View Profile
    • UHVlab - Tesla Coils | High Voltage | Education
Re: First time DRSSTC Build
« Reply #3 on: January 24, 2024, 11:42:02 AM »
MMCs are in general one of the most expensive component of a DRSSTC. I would probably not try to save money on it. However, it's up to you how reliable you want your setup to be.
If you want just 30seconds of fun, heck even 2kV MMC might be enough.
If you want something cool to show your friends and family on special occasions, 4kV would probably do.
If you want something to show often on school events for example, I would go with 6kV.
If you need the coil to work 24/7 reliable in a museum for example, I'd go for 8kV MMC.

It also depends on how high you want your OCD setpoint. I usually stick to datasheet pulse rating values, which means quite low (in your case that would be 300A). And in return run longer on-times with pulse-skipping drivers.
This saves you some money on your MMC.
« Last Edit: January 24, 2024, 11:43:43 AM by AstRii »
Bc. Marek Novotny
Czech Republic, Czech Technical University in Prague
www.uhvlab.org

Offline flyingperson23

  • High Voltage Technician
  • ***
  • Posts: 107
  • Karma: +5/-2
  • noob :)
    • View Profile
Re: First time DRSSTC Build
« Reply #4 on: January 24, 2024, 07:24:47 PM »
I second the pulse current rating and long on times. If you haven't made your driver yet, I highly suggest making the UD2.9 as its basically just the 2.7 with pulse skipping. If you're looking for cheap MMC, try aliexpress dawncaps. As far as I can tell they're mostly made for Chinese induction heaters and seem a bit sketchy, but they work great for drsstcs. My skm150 coils (and franzolis alphaDR 2/3) use a single 100nf 80A 3000vac dawncap and it's worked perfectly so far.

edit: this is the capacitor: https://www.aliexpress.us/item/2255799830104555.html?gatewayAdapt=glo2usa4itemAdapt
 I have one skm150 full bridge coil that runs 300us 450A and one SKM150 half bridge coil that runs 1-2ms 300A, both with UD2.9, both use 1 of those for the mmc and i haven't had any problems with them
« Last Edit: January 25, 2024, 07:47:53 PM by flyingperson23 »

Offline Manz

  • High Voltage Enthusiast
  • *
  • Posts: 31
  • Karma: +2/-0
    • View Profile
Re: First time DRSSTC Build
« Reply #5 on: January 25, 2024, 06:06:49 PM »
Hi
I also made a UD2.9 skm100 coil and my mmc is 97.5nF 8kv.
I usually run it at 300A 100-300us in MIDI mode

I used this capacitor type in a 4S 10P configuration without any problem, maybe this can help you
https://www.digikey.it/it/products/detail/kemet/R75UN239050H3J/12144310


Offline Saattvik24

  • High Voltage Enthusiast
  • *
  • Posts: 12
  • Karma: +0/-0
    • View Profile
Re: First time DRSSTC Build
« Reply #6 on: January 26, 2024, 08:24:30 PM »
Thank you for the help. I also wanted to know if I need to use TVS Diodes as I already have snubber capacitors. Don't they serve the same purpose? And if I do then will 440V TVS diodes be enough? KaizerPowerElectronics used the same in his DRSSTC. Thank you.

Offline AstRii

  • High Voltage Engineer
  • ****
  • Posts: 256
  • Karma: +7/-0
  • Czech Technical University in Prague
    • View Profile
    • UHVlab - Tesla Coils | High Voltage | Education
Re: First time DRSSTC Build
« Reply #7 on: January 26, 2024, 11:26:11 PM »
Quote
I also wanted to know if I need to use TVS Diodes as I already have snubber capacitors.

In general I think TVS diodes are not a good idea. I've personally had an experience where a whole bridge blew because of them. The problem is that the the bridge itself is very low impedance, all the traces are thick and there is nothing that limits the current in case a TVS diode catches a voltage spike. Chances are the current is going to be very high, combine that with the huge forward voltage drop of the TVS diode, and you got yourself enormous power which the diode is not able to withstand not even for a brief duration of the spike. The diode will not survive and go short circuit, shorting the bridge and destroying everything.

I think the only part of a DRSSTC where TVS diodes can be used, is between the Gate and Collector of IGBTs. Fairly low currents of GDT drive combined with low voltage, makes it very unlikely that a short voltage spike destroys the diode.

I also think that if your bridge shows problematic voltage transients, a voltage clamping is not a solution. It's probably caused by some non ideal switching. Snubber capacitors or better design of the circuit is needed.
Bc. Marek Novotny
Czech Republic, Czech Technical University in Prague
www.uhvlab.org

Offline Saattvik24

  • High Voltage Enthusiast
  • *
  • Posts: 12
  • Karma: +0/-0
    • View Profile
Re: First time DRSSTC Build
« Reply #8 on: January 27, 2024, 02:27:29 PM »
Also I wanted to know which is a good and simple MIDI Interrupter to build? The OneTesla interrupter? Thank you

High Voltage Forum

Re: First time DRSSTC Build
« Reply #8 on: January 27, 2024, 02:27:29 PM »

 


* Recent Topics and Posts

post Best Solution for a 80MHz / 100kV Source
[General Chat]
raimund.popp
Today at 08:52:08 PM
post Re: Hobby site
[Hobby Sites]
Mads Barnkob
Today at 08:47:59 PM
post Re: Syntherrupter - A Feature-rich, Polyphonic Interrupter
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
Mads Barnkob
Today at 07:25:48 PM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
malte0811
Today at 01:38:21 PM
post Re: Mid-sized DRSSTC build with freewheeling
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
Today at 05:33:49 AM
post Re: Small UD3 Coil project (including CAD data)
[Dual Resonant Solid State Tesla coils (DRSSTC)]
TMaxElectronics
Today at 02:52:07 AM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
TMaxElectronics
Today at 02:43:08 AM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Kevindk9
Today at 02:25:30 AM
post Kaizer VTTC 1
[Vacuum Tube Tesla Coils (VTTC)]
Mads Barnkob
February 23, 2024, 06:59:58 PM
post Re: Syntherrupter - A Feature-rich, Polyphonic Interrupter
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
Max
February 23, 2024, 06:20:27 PM
post Re: Mid-sized DRSSTC build with freewheeling
[Dual Resonant Solid State Tesla coils (DRSSTC)]
AstRii
February 23, 2024, 09:58:10 AM
post Mid-sized DRSSTC build with freewheeling
[Dual Resonant Solid State Tesla coils (DRSSTC)]
markus
February 23, 2024, 08:43:42 AM
post Re: UD2.7 Thru Hole Capacitor Selection
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
February 22, 2024, 01:06:19 PM
post Re: LabCoatz Staccato QCW No straight sparks
[Dual Resonant Solid State Tesla coils (DRSSTC)]
alan sailer
February 22, 2024, 12:53:22 AM
post Re: LabCoatz Staccato QCW No straight sparks
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
February 21, 2024, 11:37:47 PM
post Re: ESAB Bantam TBH 140 Welder Restoration
[Laboratories, Equipment and Tools]
rikkitikkitavi
February 21, 2024, 10:58:53 PM
post Re: LabCoatz Staccato QCW No straight sparks
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Admiral Aaron Ravensdale
February 21, 2024, 09:13:05 PM
post Re: LabCoatz Staccato QCW No straight sparks
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
February 21, 2024, 09:04:11 PM
post Re: LabCoatz Staccato QCW No straight sparks
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Admiral Aaron Ravensdale
February 21, 2024, 08:53:07 PM
post Re: LabCoatz Staccato QCW No straight sparks
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
February 21, 2024, 07:48:47 PM
post Re: LabCoatz Staccato QCW No straight sparks
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Admiral Aaron Ravensdale
February 21, 2024, 07:28:29 PM
post Re: LabCoatz Staccato QCW No straight sparks
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
February 21, 2024, 06:58:39 PM
post LabCoatz Staccato QCW No straight sparks
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Admiral Aaron Ravensdale
February 21, 2024, 02:31:59 PM
post UD2.7 Thru Hole Capacitor Selection
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Saattvik24
February 21, 2024, 02:30:10 PM
post Re: DIY X-RAY generator made of eBay parts
[X-ray]
PhotonLab
February 20, 2024, 03:14:58 PM
post Re: DIY X-RAY generator made of eBay parts
[X-ray]
alan sailer
February 19, 2024, 06:08:05 PM
post Re: Ramped DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
alan sailer
February 19, 2024, 03:03:37 PM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
AstRii
February 19, 2024, 04:34:22 AM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
davekni
February 19, 2024, 04:27:28 AM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
AstRii
February 19, 2024, 03:59:51 AM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
davekni
February 19, 2024, 03:45:51 AM
post Re: Ramped DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
February 19, 2024, 03:30:09 AM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
AstRii
February 19, 2024, 02:38:49 AM
post Re: Ramped DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
alan sailer
February 19, 2024, 01:52:20 AM
post Re: Lathe Restauration
[General Chat]
TMaxElectronics
February 19, 2024, 12:47:27 AM
post Re: VS-GP250SA60S IGBT suitability - no flywheel diode
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
February 18, 2024, 10:32:36 PM
post Re: Ramped DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
February 18, 2024, 10:06:58 PM
post Re: VS-GP250SA60S IGBT suitability - no flywheel diode
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Hydron
February 18, 2024, 11:43:44 AM
post Re: VS-GP250SA60S IGBT suitability - no flywheel diode
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Keybored
February 18, 2024, 03:41:12 AM
post Re: Ramped DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
alan sailer
February 18, 2024, 02:43:37 AM
post Re: Ramped DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
February 17, 2024, 10:45:17 PM
post Re: Ramped DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
alan sailer
February 17, 2024, 10:29:30 PM
post Re: RDRSSTC - Project Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
February 17, 2024, 10:20:39 PM
post Re: Ramped DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
February 17, 2024, 10:14:20 PM
post Re: RDRSSTC - Project Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
February 17, 2024, 08:56:42 PM
post Re: Ramped DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
February 17, 2024, 08:52:45 PM
post Re: DIY X-RAY generator made of eBay parts
[X-ray]
PhotonLab
February 16, 2024, 09:20:44 AM
post Re: RDRSSTC - Project Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
February 16, 2024, 03:50:58 AM
post Re: Ramped DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
alan sailer
February 16, 2024, 03:27:18 AM
post Re: DIY X-RAY generator made of eBay parts
[X-ray]
klugesmith
February 16, 2024, 01:55:48 AM
post Re: RDRSSTC - Project Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
February 15, 2024, 07:11:20 PM
post Re: DIY X-RAY generator made of eBay parts
[X-ray]
PhotonLab
February 15, 2024, 11:31:42 AM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
davekni
February 15, 2024, 06:01:49 AM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
AstRii
February 15, 2024, 05:13:13 AM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
davekni
February 15, 2024, 04:26:00 AM
post Re: RDRSSTC - Project Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
February 14, 2024, 06:25:45 PM
post Re: DIY X-RAY generator made of eBay parts
[X-ray]
Luca c.
February 14, 2024, 03:33:25 PM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
AstRii
February 14, 2024, 12:57:01 PM
post Re: RDRSSTC - Project Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
February 14, 2024, 05:32:30 AM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
davekni
February 14, 2024, 05:22:35 AM
post Re: VS-GP250SA60S IGBT suitability - no flywheel diode
[Dual Resonant Solid State Tesla coils (DRSSTC)]
AstRii
February 14, 2024, 04:34:14 AM
post Re: VS-GP250SA60S IGBT suitability - no flywheel diode
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Keybored
February 14, 2024, 03:02:16 AM
post Re: RDRSSTC - Project Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
ZakW
February 14, 2024, 01:58:17 AM
post Re: ZCS for SSTC without E class??
[Solid State Tesla Coils (SSTC)]
AstRii
February 13, 2024, 09:30:40 PM
post DIY X-RAY generator made of eBay parts
[X-ray]
PhotonLab
February 13, 2024, 03:54:23 PM
post VS-GP250SA60S IGBT suitability - no flywheel diode
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Keybored
February 13, 2024, 09:57:12 AM
post Re: TNY265 flyback issue
[Transformer (Ferrite Core)]
davekni
February 13, 2024, 03:50:05 AM
post Re: TNY265 flyback issue
[Transformer (Ferrite Core)]
AstRii
February 12, 2024, 07:30:42 PM
post Re: PLL "IHFSSTC" concept and schematic
[Solid State Tesla Coils (SSTC)]
Anders Mikkelsen
February 11, 2024, 10:30:38 PM
post Re: Help finding correct IGBT Module
[General Chat]
rikkitikkitavi
February 11, 2024, 09:41:57 PM
post Re: PLL "IHFSSTC" concept and schematic
[Solid State Tesla Coils (SSTC)]
Lucasww
February 11, 2024, 06:34:35 AM
post Re: TNY265 flyback issue
[Transformer (Ferrite Core)]
davekni
February 10, 2024, 03:55:35 AM
post Help finding correct IGBT Module
[General Chat]
cnichols
February 09, 2024, 09:34:13 PM
post TNY265 flyback issue
[Transformer (Ferrite Core)]
AstRii
February 09, 2024, 06:45:46 PM
post Re: Help Sourcing or Debugging My Small HV Module
[Transformer (Ferrite Core)]
michaelrcolton
February 08, 2024, 07:04:07 PM
post ESAB Bantam TBH 140 Welder Restoration
[Laboratories, Equipment and Tools]
Mads Barnkob
February 08, 2024, 06:47:35 PM
post Re: Anyone used iCCFL.com?
[Transformer (Ferrite Core)]
FPS
February 08, 2024, 12:27:47 AM
post Re: PLL "IHFSSTC" concept and schematic
[Solid State Tesla Coils (SSTC)]
Anders Mikkelsen
February 07, 2024, 09:49:11 PM
post Re: Anyone know of a good variable driver?
[Beginners]
NyaaX_X
February 07, 2024, 04:48:02 PM
post Re: Anyone know of a good variable driver?
[Beginners]
FPS
February 07, 2024, 08:17:37 AM
post Re: How much power?
[Spark Gap Tesla Coils (SGTC)]
Terry
February 06, 2024, 10:51:35 PM
post Re: OCXO Reference devolopment - or a story about scaleability
[Radio Frequency]
Mads Barnkob
February 06, 2024, 07:29:29 PM
post Re: Anyone used iCCFL.com?
[Transformer (Ferrite Core)]
MRMILSTAR
February 05, 2024, 05:18:33 AM
post Re: Anyone know of a good variable driver?
[Beginners]
Mads Barnkob
February 04, 2024, 09:16:25 PM
post Re: PLL "IHFSSTC" concept and schematic
[Solid State Tesla Coils (SSTC)]
davekni
February 04, 2024, 09:13:36 PM
post Anyone used iCCFL.com?
[Transformer (Ferrite Core)]
FPS
February 04, 2024, 09:00:30 PM
post Re: Anyone know of a good variable driver?
[Beginners]
FPS
February 04, 2024, 08:56:14 PM
post Re: OCXO Reference devolopment - or a story about scaleability
[Radio Frequency]
Da_Stier
February 04, 2024, 08:18:01 PM
post Re: Anyone know of a good variable driver?
[Beginners]
Mads Barnkob
February 04, 2024, 08:04:36 PM
post OCXO Reference devolopment - or a story about scaleability
[Radio Frequency]
Da_Stier
February 04, 2024, 07:56:55 PM
post Re: PLL "IHFSSTC" concept and schematic
[Solid State Tesla Coils (SSTC)]
Lucasww
February 04, 2024, 08:45:53 AM
post Anyone know of a good variable driver?
[Beginners]
FPS
February 04, 2024, 12:56:52 AM
post Re: looking for a pll sstc schematic with gate driver ic.
[Solid State Tesla Coils (SSTC)]
yourboi
February 03, 2024, 07:01:12 PM
post Re: SSTC bus inductance
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
February 03, 2024, 08:04:29 AM
post Re: SSTC bus inductance
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
February 03, 2024, 06:01:12 AM
post Re: is there a standard pinout of optical audio output connectors?
[Electronic Circuits]
Rafft
February 02, 2024, 05:04:44 PM
post SSTC bus inductance
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Benjamin Lockhart
February 02, 2024, 08:34:56 AM
post Re: How much power?
[Spark Gap Tesla Coils (SGTC)]
klugesmith
February 01, 2024, 07:03:41 PM
post Does anyone have a 3d print form for a spiral primary on 4" pvc?
[Solid State Tesla Coils (SSTC)]
yourboi
February 01, 2024, 06:23:45 PM
post Re: How much power?
[Spark Gap Tesla Coils (SGTC)]
Mads Barnkob
February 01, 2024, 07:53:53 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 
SimplePortal 2.3.6 © 2008-2014, SimplePortal