900W H-class PA Amp with Limiter

[sale030]

Hi guys, I'll repeat my question: Is it possible to run H900 at 2 ohms using 4 pair of MJW21195/MJW21196 with 120-60-0-60-120?
What power expect?
Also, here is schematic for the guys who like challenge. That is something more then 1KW SMPS from diysmps forum, but I reformed that in two step, for H900 amp.
Cheers.

 

[CIPRIANDRAGOS]

Have anyone format Gerber for Apex H900 + Protection module and Apex B500 ?

 

[iiee3602]

pls. share your pcv layout. thnks!

 

[iiee3602]

pls. share the pcv layout of SMPS 1k. thnks!

 

[sale030]

Here is PCB. You can take up to 1.3KW at 100kHz.
Cheers

 

[sale030]

Well, here are Gerber and Excellon for H900 version 2.1.
Enjoy!

 

[sale030]

Also, if somebody need details about building SMPS, I can help.

 

[thimios]

Also, if somebody need details about building SMPS, I can help.

Let's go with the first question.🙂
Where we can find the transformer?
Thimios.

 

[sale030]

Ofcourse, you must to made yourself. ETD49 core N87 so as accessories you can bay online from Mouser.
Core: B66367GX187 EPCOS | Mouser
Coil Former: B66368B1020T1 EPCOS | Mouser
Clamp: B66368A2000X EPCOS | Mouser

 

[CIPRIANDRAGOS]

SMPS 500-1000-2000W

Another SMPS schematic but need some changes for class H 🙂

 

[AndrewT]

post2970 middle pic,
is 0.6mm diameter wire typical of 55kHz?

I would expect a thinner wire to reduce losses.

 

[sale030]

You're right, 0.6 mm is too thin, for calculation use min. 5A/mm2. Also, it is recommended to use Litze wire due to skin effect at high frequency.

 

[AndrewT]

I was suggesting that 0.6mm was too thick, but I don't know, so I am asking.

I would expect 0.2mm to 0.4mm diameter at 55kHz.

 

[CIPRIANDRAGOS]

post2970 middle pic,
is 0.6mm diameter wire typical of 55kHz?

I would expect a thinner wire to reduce losses.

I don't know exactly.I received this kit from a friend and i posted it here.
I do not know much about SMPS but I think it puts thicker wire for not have problems at high power consumption.
Regards!
Ciprian

 

[AndrewT]

Can any Member with SMPS Design experience guide us to suitable wire diameter for the typical HF frequencies in use?

 

[mihailo]

0.6mm diameter wire will be ok for 55KHz, but more thin wires are always a better option.
I personally use 4x0.4mm diameter wire for 50-80KHz.

Sale where are you from?
I can give you some 0.4mm wire.

 

[sale030]

0.1 to 0.4 wire twisted into one, so as to obtain the necessary thickness for the desired amperage. For example, 10A requires 280x0.1mm, which gives a total of 1,69mm, or 2,23mm2

 

[sale030]

That is for 80KHz calculated.
By the way, I am from Bor.

 

[mihailo]

280x0.1mm 😱
It is much easier to roll up transformer such as in this picture of Mr. Macola, my countrymen from Kragujevac.

 

[sale030]

Yes, of course. Cooper foil is good solution also, especialy for high power. But it's hard to find that foil???