Author Topic: DRSSTC PCB pack (draft)  (Read 845 times)

Offline profdc9

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DRSSTC PCB pack (draft)
« on: February 10, 2018, 09:06:10 PM »
Hello,

I have been working on some PCBs for DRSSTCs within the last couple of months or so.  They are laid out with the freely available Kicad software package:

http://kicad-pcb.org/

They are licensed under the Creative Commons CC-BY-SA 4.0, so that even commercial use of the designs is permitted.

There are six designs:

1.   UD2.7C through-hole design, schematic, bill-of-materials, gerbers
2.   Interrupter design, schematic, bill-of-materials, gerbers, based on Steve Ward's burst mode interrupter
3.   My own SSTC/half bridge inverter design, schematic, bill-of-materials, gerbers
4.   Full-bridge layout for TO-247
5.   Half-bridge layout for TO-247
6.   Half-bridge layout for multiple TO-247s

I invite anyone interested to look at the designs and see if they are useful, and let me know if there are any mistakes.

Best,

Dan


Offline TDAF

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Re: DRSSTC PCB pack (draft)
« Reply #1 on: February 11, 2018, 06:13:42 AM »
well your eagle files are giving an error saying that start tag was expected

Offline profdc9

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Re: DRSSTC PCB pack (draft)
« Reply #2 on: February 11, 2018, 09:28:06 AM »
It is not for Eagle.  It is for Kicad, which is free software, so you can download it for free and look at it using that software.  I thought using Kicad would make it easier for those without Eagle to access, as it is not limited unlike the trial version of Eagle.

I found I was missing a capacitor in the interrupter, I have fixed the design.  I also widened the holes for 6-32 screws for the half-bridge/full-bridge boards.

I forgot to mention that all the boards but the interrupter board are all 10 by 10 cm footprint, with 9 by 9 cm hole spacing for M3, so they can be stacked together.

Dan

Offline futurist

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Re: DRSSTC PCB pack (draft)
« Reply #3 on: February 12, 2018, 12:20:55 AM »
Thanks very much for sharing! I'll build your interrupter at some point, always wanted to have classic 555 one :)
I'm sure many people will like though-hole UD2 since Mads had many requests for his though-hole UD PCB


Offline Mads Barnkob

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Re: DRSSTC PCB pack (draft)
« Reply #4 on: February 12, 2018, 12:17:25 PM »
Thank you very much for making this available to everyone :)

I have been lazy and kept postponing tidying up my through-hole boards so that they were ready for public release, never happened and its been so many years now that I forgot about errors and tweaks needed :o

Did you build the burst-mode interrupter yet? I recall that I never got the burst-mode to work many years ago, properly a fault of my own, but maybe there is a fault in the schematic...
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline profdc9

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Re: DRSSTC PCB pack (draft)
« Reply #5 on: February 12, 2018, 04:38:50 PM »
I have not build the interrupter yet.  I have checked Steve Ward's design and it seems fairly simple, including the burst mode, but I have not made it yet.  I am glad to make this available; I have learned a great deal about DRSSTC operation by examining these circuits and understanding how they work.

Mads, one request I have, if it is not a serious imposition, is that perhaps you could check the schematic of UD2.7C and make sure there's nothing out-of-place?  I have examined it as closely as I can, but one can often not see problems after one has examined something many times.

Anyways, I have attached a new version of the files, where I added a fourth transistor layout, with 8 TO-247 transistors in a full-bridge configuration.  I also added a spot for TVS diodes to all of the bridge layouts to prevent VCE overvoltage.  I also included a PNG of each board without components so that one can examine it to find where each component should be placed, that way you can have a printout of the bill of materials and the board in front of you when assembling.

Dan


Offline profdc9

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Re: DRSSTC PCB pack (draft)
« Reply #6 on: February 19, 2018, 03:58:06 AM »
Hello,

I have added another board to the PCB pack I am working on, and fixed a few minor things.

I wanted to make a version of the universal driver that requires minimal or exotic proprietary parts because through-hole parts are harder to find, so I mixed and matched UD2.7C and UD1.3B parts, keeping the phase lead, but taking out the TL3116/LT1016 type op-amp and putting back the 74HC14 so the hysteresis is not adjustable.  Also, I made the UVLO a LM311 comparator rather than a specialized chip.  The only more specialized part left is the TC4427/MAX4427/IR4427/UD27423, and TC4427s are available from many sources.  I removed the older OPF2412T module from the board, and added 4N28 optoisolator control in a region that is separated and insulated from the rest of the board.  I found a minor flaw in the interrupter which I have fixed.  I have attached a copy of the schematic, and an archive of the now eight boards.

Dan

High Voltage Forum

Re: DRSSTC PCB pack (draft)
« Reply #6 on: February 19, 2018, 03:58:06 AM »

 


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