Author Topic: Projet 1ère DRSSTC  (Read 295 times)

Offline Krisss14400

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Projet 1ère DRSSTC
« on: September 07, 2021, 04:13:02 PM »
Hello everyone,

I am French, I work in industrial maintenance and I am passionate about high voltage and electric arc.
My job allows me to be able to recover high power variable speed drives (intended for destruction) with a lot of component necessary for the construction of a Tesla coil.
As you can see on the attached photos, the last drive that I recovered is equipped with IGBT nominal 300A, I intend to keep a large part of the assembly as is, to make a DRSSTC powered in single phase (230V ~), I could mount up to 40A consumption.



I read with great interest the various guides of Mads Barnkob, a gold mine of information!
So based on these different parameters, what size of secondary coil I could build in order to best exploit these IGBTs?
I would also like, later, to add the QCW option to be able to either make music or make huge electric arcs.

The coil that we see in the photos was connected in series on one of the output phases of the IBGT (it seems to me) surely for the power factor, I kept it in case, I would see at time of adjustment if necessary.

Sorry for any language errors, I am using a French / English translator.
« Last Edit: September 07, 2021, 04:16:29 PM by Krisss14400 »

Offline futurist

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Re: Projet 1ère DRSSTC
« Reply #1 on: September 09, 2021, 10:40:58 AM »
Hi and welcome to the forum!

Those are some nice IGBT bricks you have, how many of them are in that inverter?

I'm using a similar brick for DRSSTC with 160 mm diameter secondary
https://highvoltageforum.net/index.php?topic=78.msg398#msg398

They are too slow for smaller coils, for QCW coils you have to use faster TO-247 IGBTs

Offline Krisss14

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Re: Projet 1ère DRSSTC
« Reply #2 on: September 10, 2021, 05:58:53 AM »
Thanks   :D
 Given that this is a three-phase drive, there are 3 of them so I would have one in reserve, and by then I could have recovered another;)
Wouah,  your coil is top, I wish I could get a similar result  ;D
 For the TO-247 IGBTs I have the impression that we are limited to low powers, there is no other solution to do QWC at high power?  What is this necessary speed?
Despite having searched on the forum, I did not see the difference in design between a classic DRSSTC and a QWC, can you enlighten me?
 For sizing, after looking in the sizing tables, I actually came across a diameter of 160 mm for the secondary coil, that confirms this point to me anyway.
 I have another question (sorry ::) ), for the geometry of the primary, if we measure the efficiency / risk factor, should we start on flat, vertical, or 45 ° coil instead?
« Last Edit: September 10, 2021, 06:25:35 AM by Krisss14 »

Offline futurist

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Re: Projet 1ère DRSSTC
« Reply #3 on: September 10, 2021, 11:00:04 AM »
Here in Europe with 240V you could go with halfbridge and a voltage doubler

To have straight streamers in QCW you have to have a coil with >300 kHz resonating frequency
It's basically a DRSSTC with buck converter that feeds a rising voltage into the inverter input

You can read more here:
https://www.loneoceans.com/labs/qcw/

High Voltage Forum

Re: Projet 1ère DRSSTC
« Reply #3 on: September 10, 2021, 11:00:04 AM »

 


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