primary winding for push-pull converter @100amps, 100kHz

[lumanauw]

Hi, Tahmid,

Thanks for your post advising not to write anything against anybody personally.

I fully agree with your advice. But you should not provide this advice to only 1or 2 persons but to all in this Forum including John and EVA also.
.

Every member who break the rule will be treated the same, you can count on it.

When you see something that you feel unnecessary, just hit the "report" button in the page. This report will come to all the moderators.

You should not be a biased moderator- rather unbiased to all. I said this as I could find that somebody is constantly making degrading remarks against person/country but you were inactive and failed to provide advice to them.

Again, please direct me to the exact URL of somebody that is "making degrading remarks against person/country". I cannot find it, please help me. If your report is correct, we will take action toward the poster.

I want that you should keep an unbiased eye on all the postings on this Forum and provide everybody the same advice.

This is quite hard to fullfill, as there are so many posts to watch, while there are not many moderators. If you feel something, please hit the "report" button, it helps us alot.

We really need to solve this issue. We cannot afford claims that we do nothing about personal attacks, racism, discrediting a member etc, for the good of all of us and for credibility of DIYaudio.com itself.

Hope to see your cooperation.

[jneutron]

Originally posted by golam
he claims that many ideas/teachings of many gurus of SMPS/powdered cores are wrong.

No, just the two ideas that you posted.

Originally posted by golam
I will request my friend John to kindly present his ideas in writings outside the DIY Audio Forum

Actually, I do. But in publications you do not read, and content that you will not understand. That by no means indicates stupidity, just that it is not your area of expertise.

Originally posted by golam
Hi JOhn,

Thanks for the link. When I get time I will read that. You are very much attached to Dr. Sullivan but I did not get the required information from his writings related to the very low level information required for answering Tahmid's questions while searching the website you have provided earlier.

I am not attached to Dr. Sullivan at all. What I like about him is the fact that he has presented his PEER REVIEWED research papers online such that everybody can gain access to it. His level of expertise is well above that of the books you have mentioned, and I have confidence that the authors you quote know of Dr. Sullivan, and learn much from his writings.

I did not say your answers to Tahmid were incorrect..you must read the posts better. I merely presented the high level work of world leading experts which shows exactly why the two pictures you presented were incorrect.

Your response to this information that is available to all on the internet, has been a sarcastic attack against me. It is clear to all that you have not attempted to discuss the electromagnetic field theory aspect. If you are indeed Masters prepared, you should have been able to understand the issue. I learned this stuff in 1974, but it seems that E/M theory is no longer required, eh?

Instead, you have avoided the technical discussion by pulling the race card, by claiming an authority is above reproach (even when his information is incorrect as proven by papers published 10 and 12 years ago), and now sarcasm.

Originally posted by golam
I found that Colonel's Book is excellent for understanding high frequency Transformers and Inductors with Ferrite/Toroid for novices as well as experts and specially useful for the self taught people full of misconceptions.

From what I have seen so far, it looks like his book is a very good source for the hobbiest to learn from.

Originally posted by golam
I have done my Thesis in Masters in Power Electronics following the Books I mentioned, specially the Book of Colonel.

Ah, so this explains why you have disregarded all information which conflicts with his incorrect picture...you have a vested interest in defending all he has written..

I hope you choose to continue your pursuit of academic excellence towards a PhD..I like the fact that you have reached the MS, but you will find that a good course in E/M theory will complement that which you have already learned. In addition, a good course in critical thinking and that of paradigm shifts, their cause and effect, will also be good for you...they will allow you to see why it is bad to consider one person's work as infallible with no questioning, and will help you to question all you read... Who knows, perhaps in the near future you may be responsible for some of those paradigm shifts..

Originally posted by golam
I have not heard regarding Dr. Sullivan earlier and will try to follow his research papers if I decide to write any thesis in future. Thanks for your advice.

His is at the next level of understanding..you would do very well to reach for that level should you continue onward.

Originally posted by golam
My sincere advice to you, please go through the Colonel's Book and you will find it a goldmine of information regarding Ferrite/Toroid and then I am sure you will be convinced that Fig/pic/contents of that Book is not wrong.

While I am sure the book is indeed a goldmine, no amount of knowledge within that book will be able to alter the laws of physics. Using copper to "control" gap fringing is a dissipative solution that is not good, and flux fringing in a toroid will disregard an incorrect picture and again, follow the laws of physics.

Originally posted by golam
So, please don't feel sorry for not knowing my native language.

Why not? When I discuss technical issues with all who do not speak english as a native language, I sorrow in that it is they who have worked at a second language and not I. But I also understand the futility of trying to learn 10 or so languages to discuss with collaborators. In my discipline, english has been adopted de-facto as the standard.

Originally posted by Tahmid
But you should not provide this advice to only 1or 2 persons but to all in this Forum including John and EVA also.

Please point out specific posts which were demeaning, sarcastic, and racially intolerant.

So far, Golam and SG have been the only two posters who have done so.

Originally posted by Tahmid
We, the younger members want to learn ideas/knowledge and at the same time etiquette also from you seniors.
Thanks.

Hey, who are you calling "senior"..

Etiquette: three lessons you should learn from this thread.

1. When discussing a technical entity, do not attempt to divert the discussion by invoking the race card.

2. When discussing a technical entity, do not use the "authority" card as a defense against absolute proof that the authority is in error.

3. When discussing a technical entity, do not use sarcasm to divert the discussion away from a losing viewpoint.

All three of these methods have been tried, and all have been unsuccesful.

Instead, just discuss, and remain civil.

Cheers, John

ps..wait, four lessons...don't call us old guys "seniors"..whippersnapper..

[anatech]

Hi Tahmid,

I fully agree with your advice. But you should not provide this advice to only 1or 2 persons but to all in this Forum including John and EVA also.

Tahmid, there has to be a cultural thing going on here, because both John and Eva have been very professional. So far, golam has been the very worst offender. This has greatly reduced the value of this thread.

From here on in, there will be no more whining and crying about insults and perceived insults. It may not be possible to remove all this garbage at this time. Any more of this will probably end up with someone getting some bin time.

We are an international forum. The official language is English, but we try to be as accommodating as possible to people who do not speak English as a first (or second, third or fourth) language. Everyone needs to assume that no insult is intended by a post unless it is clear that the author is being insulting. At that point, use the post reporting function to alert the moderators. I can say that most reported posts are fine. Actually, most only need to be moved.

As moderators, we are members first with extra clean up duties to perform. We do try to be as impartial as possible. The moderating team also has an international makeup, so I think we have a good moral compass to go by.

Just because you feel strongly about something does not mean you are correct. Again, values from country to country may vary. We recognize that and simply ask that you do the same. Try to be more tolerant of other viewpoints. Physics and chemistry are international constants of course. That is the common ground we all share.

-Chris

[Electrone]

Ah, ok..mylar is polyester...I didn't know that.

Hi John,

I believe mylar is short for metalized polyester.

[megajocke]

No, it's not metalized (although I think you can get that if you want). It is a trade name:

http://en.wikipedia.org/wiki/Mylar

Sure is shorter and easier to remember than Biaxially-oriented polyethylene terephthalate