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wiseguy

Guru

Joined: 21/06/2018
Location: Australia
Posts: 1261
Posted: 11:28pm 04 May 2021      

Nicks, I have watered down my response & extend an olive branch and accept your apology. I don't mind answering questions or/and criticism publicly if I have stuffed up - I'm not infallible either.

  nickskethisniks said  The Mad power board in combination with the nanoverter is probably the best choice for people that just need a proven design that works when finished.


  nickskethisniks said  I didn't say it is the way to go for starters

The first statement seemed to infer your strong support of the MAD design.

I also apolgise to Peter for the unintended "pollution" but ignoring any negativity the design approach discussion has some good food for thought & ideas coming out.

One could infer that in the one post by promoting the Mad design, displaying your design approach and drawing negative attention to and suggesting my design approach seemed to have multiple flaws is not a great approach to take in a public forum, and I objected. I think you knew by saying "I hope that I haven't offended you" it was probably not going to be received well.

Your suggestion that the supply busbar energy may transfer to the gate wire does not take into consideration that on the other side of the gate trace, the AC terminal return bus carries equal and opposite energy along the same length back to the AC terminal, that should cancel out any induced signal.  Proposing to move the AC terminal to the end could only have a negative effect.

I also like your thinking outside the square approach to FET high current stage design and I do strongly support input of fresh and novel ideas. It is a shame that with the other content on your post it drew attention away from your good ideas & got less attention than it deserved.

End of pollution .... normal channel content can now resume.

I considered the copper bus bar approach of Haxbys when trying to exploit 1oz PCBs. I was too lazy/uninspired to go and get a decent length to play with but I did get a small sample from the fellow that wired up my 3 phase to the workshop. Its only downfall is that it tells you where it will go with its regular "feet" but to design in from go I still think it has a lot of merit & I will probably use it at some stage.  The insulated cover is also a big plus to help keep you out of trouble when probing measurements whilst building/testing and can maybe be removed to assist against heat build up when commissioned ?

Lengths of vertical PCB strips with appropriate feet at regular intervals is another way of exploiting cheap PCB manufacture to our advantage.
Edited 2021-05-07 12:53 by wiseguy