Author Topic: Next Gen DRSSTC  (Read 12875 times)

Offline Mads Barnkob

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Re: Next Gen DRSSTC
« Reply #60 on: May 26, 2019, 08:49:19 PM »
Is it just the recording or is there some stuttering in the music playback?

Do you have more recordings from a little further away, the video does not fully represent how large the coil and sparks really are at those power levels! :)
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Offline Netzpfuscher

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Re: Next Gen DRSSTC
« Reply #61 on: May 27, 2019, 08:07:12 AM »
No I have no other videos, the cage is too small for my cellphone. For a bigger image I need a wide angle lens.

Yes you are right, there is stuttering. I investigate this, there are two options. The javascript midiplayer cause this, or there is crap on the serial line in the coil. I added a counter for broken packets in the software. The protocol works like this:

-packet with a sequence number is send to coil
-coil sends a ACK with the sequence number
-the next packet is send
-packet gets corrupted
-no ACK is send
-after 50ms the packet is retransmitted

But 50ms is way to slow for MIDI, you can hear this. I need to play with the parametes perhaps I reduce the retransmit time and introduce a NACK which causes the transmitter to resend the last packet instantaneous.

You don't hear this in the first video. This uses the SID-Synth which has a buffer with around 500ms in the driver.

And we need to change the serial line in the coil. There is a 1m shielded cable from the driver at the bottom to the front panel with the fiber transceiver. In the past we have seen much crap on this line. With the protocol this crap is not visible in the data but it adds jitter.
« Last Edit: May 27, 2019, 08:25:14 AM by Netzpfuscher »

Offline Hydron

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Re: Next Gen DRSSTC
« Reply #62 on: June 16, 2019, 03:18:25 PM »
Just a quick question for Netzpfuscher - is the behaviour of the lead_time value changed at all between versions of the UD3 code? I've had a go with a newer version and it doesn't seem to have any effect on the timing of the IGBT switching, whereas previously (at least a year ago!) it seemed to work as intended. I'll have a dig through the code to properly understand how it works, but I thought I'd just quickly ask incase there is an easy answer.

On another note, I have gotten my CY8CKIT-059 dev board up and running (other than the bootloader mode) with an ESP32 for wireless control - seems to work nicely! For those looking to do the same, note that I did need to change things a bit to run the PSoC UART TX on a SIO pin so that I could lower the high output level (the ESP32 isn't 5V tolerant). I used a different board to the Olimex ESP32 as I only wanted Wifi mode and it was cheap on ebay - I will integrate a ESP32-WROOM module directly into my final design whenever I get to that point!

Offline Netzpfuscher

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Re: Next Gen DRSSTC
« Reply #63 on: June 16, 2019, 03:39:15 PM »
No, I think I haven't touched it. But I cannot guarantee that there is no bug on other changes which can cause this. At the first sight everything looks ok. I haven't measured the leadtime for a while now, all of our coils have the same SKM400 bricks.

I have used a voltage divider on the TX pin for the ESP32.

Actually there is a new feature incoming, a alarm and event system. Which helps a lot to debug a coil.



At the end of the month there is a big event here in Germany "Extraschicht" where we have a high voltage show at a old power station. Besides a 4m SGTC we have the big UD3 DRSSTC. I hope everything works  :o

Offline Hydron

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Re: Next Gen DRSSTC
« Reply #64 on: June 16, 2019, 04:51:26 PM »
Thanks for the answer, I'll have more of a dig myself in the code. I look forward to the new features, and any footage from the show!

Offline Mads Barnkob

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Re: Next Gen DRSSTC
« Reply #65 on: June 17, 2019, 11:13:33 AM »
Good job on the continued development of the software, looks real good with a debugging system and as Hydron says, we look forward to video from the show, hopefully you can get on a distance this time to capture how big it really is :)
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline Netzpfuscher

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Re: Next Gen DRSSTC
« Reply #66 on: June 17, 2019, 09:01:29 PM »
I finished the alarm & event system. I added a value field that you can see at which temperate or voltage something happens. The sysfault is much finer, now you can clearly see which signal is bad and stops the coil.

alarms get  --> shows the last 50 events
alarms reset --> clears the event list
signals --> shows the signal states
kill reset --> clears the sysfault registers which are not self clearing

I merged everything in the master branch https://github.com/Netzpfuscher/UD3

@Hydron I cleaned the timing calculations but I can't see any fault. If you find something, feel free to make a pull request. By the way the lead_time resolution is in 15ns.


« Last Edit: June 17, 2019, 09:03:13 PM by Netzpfuscher »

Offline Netzpfuscher

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Re: Next Gen DRSSTC
« Reply #67 on: July 02, 2019, 07:19:23 AM »
I have a couple of videos from our high voltage show at the Extraschicht. Everything was working fine  8) The man in suit is my friend Florian.

The big SRSGTC

DRSSTC with Popcorn

DRSSTC with Pirates

Offline Netzpfuscher

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Re: Next Gen DRSSTC
« Reply #68 on: July 14, 2019, 06:06:30 PM »
There are some new features:
  • Envelope generators for MIDI and SID (ADSR)
  • Signal monitor with auto refresh (q for quit)
  • Synthesizer monitor with auto refresh
  • Rolling mode for alarm monitor (alarms roll)

The envelopes for SID are automatically configured over the SID-register stream. The envelopes for MIDI can be configured over the command line (mch, attack, decay, release) or over MIDI-Control Change messages (CC 73 --> attack CC 75 --> decay CC 72 --> release). You can set different envelopes for each MIDI channel. The envelope modulates the max-current the pulsewidth is constant.

The UD3-node (node.js interface) now supports the network SID-device protocol, you simply can stream SID music over the ACID64 player.

SID Demo:
« Last Edit: July 14, 2019, 06:09:08 PM by Netzpfuscher »

Offline Mads Barnkob

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Re: Next Gen DRSSTC
« Reply #69 on: July 15, 2019, 02:51:26 PM »
That video is awesome and it got so intense at 0:45!

It seems like I am running out of excuses to get a UD3 up and running, didn't someone promise me to write up a guide on which hardware to use etc? Was it Hydron? Futurist? Profdc9? I forgot and unfortunately I do not have the time or mental surplus to take in more new things from scratch right now :)
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline Hydron

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Re: Next Gen DRSSTC
« Reply #70 on: July 16, 2019, 01:54:30 AM »
Profdc9 made a through-hole UD3 PCB to mount the CY8CKIT-059 dev board (which is cheaper than a single chip, and includes a programmer) - given your aversion to SMD this is probably the way to go. Getting the board up and going isn't that hard once you have the bits, though none of us have written a guide yet as far as I know.

I'll likely be having another go with mine in the next week or so (in NZ right now), so will report back on how it runs.

Offline profdc9

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Re: Next Gen DRSSTC
« Reply #71 on: July 16, 2019, 04:05:07 AM »
The through-hole PCB is at

https://github.com/profdc9/DRSSTC-PCB-Pack/tree/master/Psoc5-power

You just need to zip the gerber files and send it to a PCB house like JLCPCB or Seeedstudio and they will send you a board.

Dan

That video is awesome and it got so intense at 0:45!

It seems like I am running out of excuses to get a UD3 up and running, didn't someone promise me to write up a guide on which hardware to use etc? Was it Hydron? Futurist? Profdc9? I forgot and unfortunately I do not have the time or mental surplus to take in more new things from scratch right now :)

Offline Netzpfuscher

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Re: Next Gen DRSSTC
« Reply #72 on: July 16, 2019, 07:39:33 AM »
I think I can release a binary package in the next days for the UD3 and the interface. Then there is no need for compiling something. At cypress there is a standalone psoc programmer app and after the initial programming you can simply drag and drop a firmware file in Teslaterm for updates.
For a simple "Hello UD3" you only need a Dev-Kit and a micro USB cable. For a teslacoil safe connection you only need a USB to TTL board, a pair of fiber transceiver and the interface software.

On the PC side it is as simple as writing the COM-Port to a config.ini, start the .exe and point your browser to "127.0.0.1:2525"

@profdc9
I need to check the pinout against your PCBs. It's possible that I changed some pins over the time. But it can easily corrected in software.

@Hydron
Whats the status with the lead time? Is there an bug?



Edit: 16.07.19 20:15

I added binarys for the UD3 and Teslaterm:

https://github.com/Netzpfuscher/UD3/releases
https://github.com/Netzpfuscher/UD3-node/releases

Flash the hex file with psoc programmer: https://www.cypress.com/products/psoc-programming-solutions
Configure the config.ini according to you com port and start the interface with: UD3-node-win.exe -c config.ini

UD3-node is only working over the UD3 UART, not over the dev-kit micro usb. You need a USB TTL UART.

« Last Edit: July 16, 2019, 08:26:05 PM by Netzpfuscher »

Offline Netzpfuscher

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Re: Next Gen DRSSTC
« Reply #73 on: August 08, 2019, 10:04:39 AM »
I'm working on a new Coil ^^ It's nearly identical to the big DRSSTC from the videos.

Resonator:
-1m secondary winding
-~56kHz fres
-500nF 15kV Atesys primary capacitor

Inverter:
-UD3
-2x Electronicon 1800µF 600V DC-Link capacitor
-SKM400 full bridge
-3 phase rectifier -->400V 3ph AC --> 565V DC






 

Offline Coyote

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Re: Next Gen DRSSTC
« Reply #74 on: September 27, 2019, 10:32:02 AM »
Hi guys,

I find this very interesting. I took a look into a schematics which is available on the web, both versions Netzpfuscher and through hole variant of Profdc9, they seem almost identical to me.

But there is something that caught my eye that I can't understand, it's about Vbus and Vin monitor.  Netzpfuscher  has a note that on each input a 500k resistor has to be connected externally. All clear, it is a differential HV probe with 100:1 attenuation. But the opamp TL082 is supplied with +/-12V, I guess the output range is almost the same, wouldn't this harm the Psoc5 input?

Offline Mads Barnkob

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Re: Next Gen DRSSTC
« Reply #75 on: September 27, 2019, 11:41:59 AM »
Netzpfuscher, seems like I completely missed your update on the inverter :( Some days the amount of new threads and posts are running wild, but that is nice :)

Nice and solid design, where did you get the DC link capacitors? The blue current transformer is for 50 Hz input current measurement? I can barely read it, is it HIMA timers? Got them cheap somewhere or just at hand, only found only price and that was not low! How about the current rating of the soft-start contactors?
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline Netzpfuscher

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Re: Next Gen DRSSTC
« Reply #76 on: September 27, 2019, 09:07:55 PM »
@Coyote
The opamp design is from Steve. You are right, the output can go around +-11V the series resistors should high enough that the output only goes to 5V. But the Psoc pin is protected by a 1k resistor. Perhaps it is good idea to clamp the signal in the next revision.


@mads
I've bought the DC link on eBay. 5 for 100€. The DC links makes the bridge design much more easy ^^
The blue transformer is a hall effect current transformer for the DC behind the rectifier. On the picture I had forgotten to put the wire through. Yes the relays are from HIMA, just simple SIL3 relays ;) I had them at hand. I don't know exactly right now I think the contractors are 40A.

I was a bit lazy the last weeks, we have a turnaround at work... The next thing is to build a enclosure for the inverter. But I have run a static load test:

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Re: Next Gen DRSSTC
« Reply #76 on: September 27, 2019, 09:07:55 PM »

 


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