Author Topic: Component questions  (Read 694 times)

Offline lovelacetx

  • High Voltage Enthusiast
  • *
  • Posts: 3
  • Karma: +0/-0
    • View Profile
Component questions
« on: December 24, 2018, 02:33:55 AM »
I'm finally getting around to making a DRSSTC.

A while ago I purhcased some new snubber capacitor boards from Ebay. They are filled with some capacitors that I think are quite usable but I'm missing some important data and welcome any comments/suggestions.

1. Electronic Concepts, 5MP1/2 Series, Metallized Polypropylene, 5uF, 1000V, 900A peak


2. Hitachi, WMTB-P Series, Metallized Polypropylene, 1uF, 1200V, ?? peak current. I cannot find any peak current data. Any guess as to a reasonable value?


3. United Chemi-con, DFDA Series, 0.47uF, 1000V, ?? peak current, again a lack of data, any help here?


Finally, I also came across several new CM100DY-12H IGBT bricks. Can these devices be used reasonably well in a DRSSTC?
I'm placing a link here to the CM100DY-12H data sheet https://drive.google.com/file/d/1S4M61G2dM0PF5QNSRJjkG5tBogCfzLxx/view?usp=sharing

Offline Mads Barnkob

  • Administrator
  • High Voltage Expert
  • *****
  • Posts: 1020
  • Karma: +16/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: Component questions
« Reply #1 on: December 24, 2018, 12:42:06 PM »
Hi lovelacetx and welcome to HVF :)

Are you asking about those capacitors for MMC or snubber application in the DRSSTC? Without having looked at the datasheets my initial comment is that 1 has too high capacitance to make a reasonable MMC without using too many capacitors. 2 is the most fitting just from the capacitance. 3 is unfit from a very bad dissipation factor it will most likely die from heat sooner than the others.

The square/rounded or should we call them flat-rounded MKP capacitors are a older type of snubber capacitors with worse specifications than modern pulse MKP capacitors, so if you are just going to use them for inverter snubbering, use one 5uF and one 1uF in parallel for a wider range of snubbering.

From others experiences (see bottom table of following link), a CM100 would properly be good for 500A+ primary peak current, you can do the math with your dream operating parameters and see if the heat dissipation fits the desired resonant frequency: http://kaizerpowerelectronics.dk/tesla-coils/drsstc-design-guide/igbts/
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline lovelacetx

  • High Voltage Enthusiast
  • *
  • Posts: 3
  • Karma: +0/-0
    • View Profile
Re: Component questions
« Reply #2 on: December 24, 2018, 08:26:54 PM »
Thanks for the feedback.

The snubber boards that I picked up for $8 each had 1x 5uF, 3x 1uF and 5x 0.47uF caps.



The 1uF caps look like good candidates for the MMC.

It looks like the CM100DY-12H IGBTs will work at 100kHz without a problem.

Offline Mads Barnkob

  • Administrator
  • High Voltage Expert
  • *****
  • Posts: 1020
  • Karma: +16/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: Component questions
« Reply #3 on: December 29, 2018, 02:05:26 PM »
I seem to recall that some of these "oval" film capacitors had a rather bad ESR rating, try and see if you can find a datasheet or some more information about them, maybe we can calculate the rest of the specifications if needed.
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline T3sl4co1l

  • High Voltage Experimenter
  • **
  • Posts: 58
  • Karma: +8/-0
    • View Profile
Re: Component questions
« Reply #4 on: December 30, 2018, 03:17:11 AM »
Think I remember seeing EC caps in some induction heaters... maybe they were GE or something completely different, it's been a while.

Hey, they have an assembly diagram online!
http://www.ppstinc.com/download/25kW_HF_Spare_Parts_List.pdf
3-11 is a radial (screw mount!) cap that handles inverter supply ripple.  I think it was white, but maybe it was yellow...

3-18 is a big array of bypass caps, I think I still have a few laying around, GE 40L3221, 2.2uF 400V.  Good ripple, maybe not suitable for full wave resonant purposes though.

And yes, those are gate driver boards, screw mounted.  Don't get excited, they're little more than a driver chip on a board.  The whole machine is... very labor intensive.

May be cheap to find spares though, would be a good enough start for a fair sized coil. :)

Tim

Offline lovelacetx

  • High Voltage Enthusiast
  • *
  • Posts: 3
  • Karma: +0/-0
    • View Profile
Re: Component questions
« Reply #5 on: January 03, 2019, 04:20:50 AM »
I can't find the exact data for these caps. The EC cap is a 5MP series, which is a very good cap, but at 5uF, too large to be useful in an MMC. The 1uF caps are Hitachi AIC
WMTB-P caps, but I can't find any meaningful data as I can for the Cornell Dubilier or EC caps.

So, I broke down and bought some CD 942C20P15K caps. Found them for ~$4.90 each (including tax and shipping) from TTI, not too bad compared prices I saw elsewhere.


Offline Mads Barnkob

  • Administrator
  • High Voltage Expert
  • *****
  • Posts: 1020
  • Karma: +16/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: Component questions
« Reply #6 on: January 03, 2019, 02:05:31 PM »
Hitachi AIC WMTB-P might be useful for a MMC, but we can not know for sure. It is a little weird that they brand it as a high frequency, high current capacitor for snubbers and give no data on it. Datasheet: https://4donline.ihs.com/images/VipMasterCap/Capacitor/HITJ/HITJS03140/HITJS03140-1.pdf

Maybe you can calculate some of the properties from their general film capacitor catalogue data: https://www.aic-components.com/app/download/14952484922/Plastic%20Film%20Katalog%202018%20EMail.pdf?t=1529920956

CDE942C capacitors are a legend in Tesla coiling, works fine for smaller DRSSTCs, but if you are going to need anywhere near 0.5uF or above, its starting to get too expensive and big GTO snubber capacitors is a cheaper alternative.
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

High Voltage Forum

Re: Component questions
« Reply #6 on: January 03, 2019, 02:05:31 PM »

 


* Recent Topics and Posts

post Re: SSTC interruptor not working
[Solid state Tesla coils]
Mads Barnkob
Today at 11:46:44 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Mads Barnkob
Today at 11:45:11 AM
post Re: "LightningStorm" VTTC project
[Vacuum tube Tesla coils]
Mads Barnkob
Today at 11:40:18 AM
post Re: My first DRSSTC on bricks
[Dual Resonant Solid State Tesla coils]
Netzpfuscher
Today at 07:46:25 AM
post Re: Si-wafers, ideas?
[Electronic circuits]
Weston
Today at 07:07:57 AM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
hightemp1
Today at 05:45:55 AM
post Re: My first DRSSTC on bricks
[Dual Resonant Solid State Tesla coils]
Laci
June 24, 2019, 09:26:47 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
Bert911
June 24, 2019, 04:58:39 PM
post Re: Static electricity measurement
[Static electricity]
Doros
June 24, 2019, 01:56:17 PM
post Re: "LightningStorm" VTTC project
[Vacuum tube Tesla coils]
Avenger
June 24, 2019, 01:28:59 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Patrick
June 24, 2019, 12:47:16 AM
post SSTC interruptor not working
[Solid state Tesla coils]
juuzpo
June 23, 2019, 10:58:48 PM
post Re: Is one of these good?
[Dual Resonant Solid State Tesla coils]
Golddustpeak
June 23, 2019, 07:22:47 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Jeff B
June 23, 2019, 05:52:56 PM
post Re: Onetesla TS driver board for OWN coil need some help
[Dual Resonant Solid State Tesla coils]
dexter
June 23, 2019, 03:15:53 PM
post Onetesla TS driver board for OWN coil need some help
[Dual Resonant Solid State Tesla coils]
donnersm
June 23, 2019, 10:09:40 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Patrick
June 23, 2019, 10:07:04 AM
post Vacuum Epoxy Potting Attempt in Progress... (Pic Update 6/23/19)
[Transformer (ferrite core)]
Patrick
June 23, 2019, 08:50:14 AM
post Re: Si-wafers, ideas?
[Electronic circuits]
johnf
June 23, 2019, 01:28:20 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Twospoons
June 23, 2019, 01:17:50 AM
post Re: Si-wafers, ideas?
[Electronic circuits]
Twospoons
June 23, 2019, 01:04:13 AM
post Re: What happens when L and C are not matched?
[Electronic circuits]
Twospoons
June 23, 2019, 01:02:55 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Coupling
June 22, 2019, 11:10:02 PM
post Re: ZVS Mazzilli circ with active gate driver - what causes ringing?
[Electronic circuits]
flyrod
June 22, 2019, 08:45:17 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
flyrod
June 22, 2019, 08:36:34 PM
post Impressive 500,000 watt radio station from the 1930's
[Electronic circuits]
petespaco
June 22, 2019, 06:18:22 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
hightemp1
June 22, 2019, 05:47:22 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
T3sl4co1l
June 22, 2019, 05:21:58 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
hightemp1
June 22, 2019, 06:10:01 AM
post Re: Siemens Polyphos 30 xray machine
[X-ray]
Mads Barnkob
June 21, 2019, 09:08:16 AM
post Re: Choke-input DC-filter
[Electronic circuits]
johnf
June 20, 2019, 08:58:07 PM
post Re: CRT hacking ideas....
[Electronic circuits]
badpeter
June 20, 2019, 07:28:00 PM
post Re: Ideas needed!
[General chatting]
MRMILSTAR
June 20, 2019, 05:13:57 PM
post Re: Why did 4HV die??
[General chatting]
MRMILSTAR
June 20, 2019, 05:07:41 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
Bert911
June 20, 2019, 02:14:55 PM
post Re: Choke-input DC-filter
[Electronic circuits]
kamelryttarn
June 20, 2019, 12:53:58 PM
post Re: Choke-input DC-filter
[Electronic circuits]
johnf
June 20, 2019, 12:09:27 PM
post Choke-input DC-filter
[Electronic circuits]
kamelryttarn
June 20, 2019, 11:43:58 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
shrad
June 20, 2019, 08:57:42 AM
post Re: adventures in homemade flyback bobbins.
[Transformer (ferrite core)]
Patrick
June 20, 2019, 04:06:00 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
johnf
June 20, 2019, 03:50:56 AM
post Re: CRT hacking ideas....
[Electronic circuits]
petespaco
June 19, 2019, 11:29:28 PM
post Re: A dynamical arc model v2
[Dual Resonant Solid State Tesla coils]
Uspring
June 19, 2019, 01:40:16 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
Mads Barnkob
June 19, 2019, 10:49:45 AM
post Re: A dynamical arc model v2
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
June 19, 2019, 10:43:32 AM
post Re: Light, laser and optics - Link collection
[Light, lasers and optics]
shrad
June 19, 2019, 10:03:54 AM
post Re: How go get single mode optic fiber to work
[Light, lasers and optics]
shrad
June 19, 2019, 10:02:21 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General chatting]
shrad
June 19, 2019, 09:35:52 AM
post Re: CRT hacking ideas....
[Electronic circuits]
badpeter
June 18, 2019, 11:35:16 PM
post Re: CRT hacking ideas....
[Electronic circuits]
Mads Barnkob
June 18, 2019, 08:22:23 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