Class-AB meets Class-D: Yamaha's EEEngine Topology - where are this Diy Projects?

[sakis]

i belive that the idea is the same with Bob Carver the true sub from sunfire was based on this topology if i remember well ....only legend BOB was thinking about this almost 20 years ago ....

I wonder where is BOB now days ...i think he was terrible when it comes to bussines but otherwise a true mastermind

[tiefbassuebertr]

Originally Posted by jcx

we do have a Class D sub forum but in gerneral why would you expect DIYers to be interested when you need pro engineering skills and tools and a free man-year or so for something of that compelxity?

I know about the ClassD forum - nevertheless I have filed here instead there, because this is a mixture of various topologies and not a pure Class-D (at least for me). Additional here comes more visitors than about the subfile "Class-D" and as I start this thread I don't know about it's compelxity (but now I know this).

The aim for start this thread isn't the needing of pro engineering advices. The aim is only to get basic informations, the degree of establishing in the marked and opinions about this topology.

jony: thank you very much for this URL and the schema.

[sakis]

well i never follow your posts my dear german friend for a number of reasons ... one of them is that your posts include so many links ( probably usefull ) but god the thing is getting too long .... another think is that my english is ok and my german simply dont exist so yes it is very strange for me to talk with someone that is called tiebassuedertr.... was it something wrong with John or Jim ????


beyond a joke i think you are very right this post belongs here since its not class D to my understanding also

to make this more simple to understand i will post one link of the sunfire white paper where Bob is talking about his 1990 dream and how he made it practice

http://www.sunfire.com/whitepapers/S...Whitepaper.pdf

[sakis]

a bit offtopic

one word for BOB .... once i talked with bob over the phone about one issue for a legend he was actually a very "landed " guy to listen to very willing to understand and share a vision with me

later on he supported my idea with documentation and e mails

it is not realy importand if the idea put in practice or make money with but still his behaviour was polite and helpfull beyond any expectation ...

way to go Bob .... thanks ...

[ontoaba]

Hi tief, it is not that compelxity(typo). It is simple, more simple than classH drivers.
And this regulator different from both carver and labgrupen. EEEngine regulator is based on linear regulator, unlike the other. This linear regulator working as normal voltage regulator. But there is unstable regulator added to help increasing efficiency by helping the voltage regulator. The unstable regulator help to supply the current needed by amplifier.

This eeengine low power version (XP1000). Lower power version in powered mixers may be simpler.

[ontoaba]

It is two interleaved switch instead of single, to achieve better ripple.

[carlosyuca]

What software is used by Mr. Ontoaba?
Why do the yamaha amplifiers uses a small silicon transformers?
Can these transfomers represent an advantage for amplifiers?. It doesn't be better to use just a smps?

[ontoaba]

TINA -Texas Instrument, may TINA7 is free version of TINA9, because I feel that it is better than TINA8.

Sorry for late replay.
I think the reason was reliability for its lightweight, they still using smps for high power version with over sized (over strengthen) IGBTs.

[songpao9999]

very good
thank you