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Registered Member #2292
Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795
Wow those look great guys! I was just about to setup a bulk buy for the boards but it looks like you guys already have that covered.
If anyone is still interested in a bulk buy let me know, I was thinking of doing blue solder mask boards seeing that most of the other colors have been done
The more people that are interested the cheaper it gets. This only of course if you don't buy one of the above already made boards.
Registered Member #18516
Joined: Sat May 18 2013, 09:09AM
Location: Lancashire, UK
Posts: 38
Are these boards documented anywhere? You say its a revised ud2.1, but Steve wards website only mentions 1.1 and 1.3. I come across lots of mentions of the ud 2.0 and 2.1 boards, but no proper info on them.
Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
The main difference is the introduction of a phase lead compensation circuit. They're not documented because Steve never actually released them to the public.
via email:
I do have newer designs, but I have spent not any time to document them for public use. You can see the design files at:
Registered Member #2292
Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795
Aragorn wrote ...
Are these boards documented anywhere? You say its a revised ud2.1, but Steve wards website only mentions 1.1 and 1.3. I come across lots of mentions of the ud 2.0 and 2.1 boards, but no proper info on them.
Maybe I'm just not looking in the right places?
I have made documentation for my boards and it's located on my website. Check the original post for the link.
Registered Member #18516
Joined: Sat May 18 2013, 09:09AM
Location: Lancashire, UK
Posts: 38
Thanks Eric,
I'd already noticed your notes, it just seemed after a quick skim thru that you'd just documented the changes you made over the original design, but reading again i see you have gone a bit further than that.
Can i ask what is the purpose of the two GDT sections? You say you can leave one of them out, under what conditions would you choose to do that?
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Aragorn wrote ...
Thanks Eric,
I'd already noticed your notes, it just seemed after a quick skim thru that you'd just documented the changes you made over the original design, but reading again i see you have gone a bit further than that.
Can i ask what is the purpose of the two GDT sections? You say you can leave one of them out, under what conditions would you choose to do that?
Cheers Kev
Excellent question. The purpose of having two gate sections is to allow flexibility between driving a half-bridge (one gate transformer) or a full-bridge (two gate transformers) - or any other similar combination.
Registered Member #18516
Joined: Sat May 18 2013, 09:09AM
Location: Lancashire, UK
Posts: 38
Ah fair enough, that makes sense.
Though I'm sure i've seen single gate drive transformers wound with ethernet cable driving a full bridge in my browsing/researching (needless to say i cant find it again!)?
Does it depend on the drive current requirements of the IGBT used?
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