Author Topic: gate drive transformer method  (Read 576 times)

Offline thedoc298

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gate drive transformer method
« on: November 29, 2021, 11:45:44 PM »
I have seen two methods for gdt, one is using 1 ferrite with all 4 outputs. 1 in 4 out. Seen others use two ferrites with 1 in two out. Any advantage with using two cores verses 1 core..? Thanks

Online davekni

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Re: gate drive transformer method
« Reply #1 on: November 30, 2021, 05:35:58 AM »
Two GDTs is necessary for running pulse-skip mode with drivers such as UD2.9.  If not running pulse-skip mode, there is generally no reason to use two GDTs.  Only slight advantage of two GDTs would be lower leakage inductance IF the single-GDT alternative used only a single primary winding wire.  If the single GDT is wound with four twisted pairs, with one wire of each pair paralleled to form the primary, that is ideal for low leakage inductance.
David Knierim

Offline thedoc298

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Re: gate drive transformer method
« Reply #2 on: December 01, 2021, 06:36:14 AM »
Two GDTs is necessary for running pulse-skip mode with drivers such as UD2.9.  If not running pulse-skip mode, there is generally no reason to use two GDTs.  Only slight advantage of two GDTs would be lower leakage inductance IF the single-GDT alternative used only a single primary winding wire.  If the single GDT is wound with four twisted pairs, with one wire of each pair paralleled to form the primary, that is ideal for low leakage inductance.

Thanks a lot, been looking at different gdt methods for months now. I can't visualize 4 twisted pairs in the manner you spoke, will draw it out on paper, but that is what I will go with. Thanks again for the good info. My brain aint as fresh as 50 years ago. Later on

Offline Mads Barnkob

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Re: gate drive transformer method
« Reply #3 on: December 01, 2021, 09:10:11 PM »
The winding method with a network cable that is described, is how I did in on my first DRSSTC: https://kaizerpowerelectronics.dk/tesla-coils/kaizer-drsstc-i/

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Offline thedoc298

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Re: gate drive transformer method
« Reply #4 on: December 01, 2021, 10:30:50 PM »
The winding method with a network cable that is described, is how I did in on my first DRSSTC: https://kaizerpowerelectronics.dk/tesla-coils/kaizer-drsstc-i/


Thanks for the visual. I have watched your videos at least 5 to 10 times a piece. With Alzheimer's its always something different.

Online davekni

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Re: gate drive transformer method
« Reply #5 on: December 02, 2021, 04:58:53 AM »
Quote
The winding method with a network cable that is described, is how I did in on my first DRSSTC: https://kaizerpowerelectronics.dk/tesla-coils/kaizer-drsstc-i/
This is a great finished GDT image.  Very neatly constructed.

I made a little step-by-step tutorial of how to wind such GDTs, using a half-bridge version for simplicity:
https://highvoltageforum.net/index.php?topic=1854.msg13949#msg13949
David Knierim

Offline thedoc298

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Re: gate drive transformer method
« Reply #6 on: December 02, 2021, 05:10:30 AM »
Quote
The winding method with a network cable that is described, is how I did in on my first DRSSTC: https://kaizerpowerelectronics.dk/tesla-coils/kaizer-drsstc-i/
This is a great finished GDT image.  Very neatly constructed.

I made a little step-by-step tutorial of how to wind such GDTs, using a half-bridge version for simplicity:
https://highvoltageforum.net/index.php?topic=1854.msg13949#msg13949

Thanks for the link, that is what I needed. And bookmarked

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Re: gate drive transformer method
« Reply #6 on: December 02, 2021, 05:10:30 AM »

 


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