Uni SMPS 300W

[Acca]

For input 1,5...2uF per Watt,for output 10uF per 1 Ampere

 

[Acca]

UU core winding like toroid:

 

[panos123]

will i have any serious problem with my transformer??
i mean with the way i winded it..

 

[posinfo]

Hi, does it work in 127v? If not, what can i do to use in 127v or 110v?
Thanks all.

 

[duuka97]

It will work i didnt tried on 120AC. Me and aca used similar SMPS to make 12V from 110V. You have to rewind trafo. I text acca to log on forum.

 

[Acca]

will i have any serious problem with my transformer??
i mean with the way i winded it..

It's OK

 

[Acca]

Hi, does it work in 127v? If not, what can i do to use in 127v or 110v?
Thanks all.

It can be used with doubler,or with half number of turns if you plan to rectify 110V with bridge (bulk voltage around 150-160VDC)

 

[posinfo]

Hi everyone, i build this smps, but it did not have power to, light the lamp, so what can i do to solve this problem? With orignal e16 and ei-33 i get +48 and -48 as i wanted, but when i put the lamp it light and turn off, and the smps make som noise, i'm using a doubler. I get 340v in the collector and the emmiter of the main transitors.
I don't know what's happening.
Please help.

 

[Acca]

Reverse current feedback winding.

 

[posinfo]

I try, a lot, but this smps don't work.
The light turn on and after 2 seconds turn off.
Seems that don't have enought power.

 

[Acca]

This is typical when current feedback is negative.Reverse polarity of current winding (winding that has smaller number of turns on your BDT)

 

[panos123]

hi acca...
as you said i can't conect bipolar transistors in parallel...
i have an idea...
i will make two separated smps on the same board...
each smps will drive a power transformer(erl35) and i will conect the secondaries of the transformers in series in order to achieve 600-700 watt 2x60 volt...
will it work?

 

[duuka97]

Use mosfet schematics with diac its better. I use that version for 2x400W class d AMP. On SMPS i used 2xirfp460 and ETD49 and works very well. And you can put fet's in paralel.

 

[duuka97]

Use schematics from post #44. R16 is CFL torus. Best Uni SMPS i ever build.

 

[Acca]

hi acca...
as you said i can't conect bipolar transistors in parallel...
i have an idea...
i will make two separated smps on the same board...
each smps will drive a power transformer(erl35) and i will conect the secondaries of the transformers in series in order to achieve 600-700 watt 2x60 volt...
will it work?

Yes,when rectify outputs and then use in series.
You can use one smps for each rail.

 

[Acca]

Use schematics from post #44. R16 is CFL torus. Best Uni SMPS i ever build.

Ma sta kazes
What do you say

 

[panos123]

acca i should first recify the outpouts of the transormers and after conect tmen in series?
or i should conect the secs of the transormers in series and after rectify them?

 

[Acca]

First rectify,then wire in series.
You can't directly connect it,because two smps won't work at same frequency and it's not synchronized.You can try to make bridge,and use two cores glued together,this will have enough power to blow your speakers

 

[panos123]

today i made the first smps...
its working ok with mje13009...
now i will rewind the core for 60 volt....
what do you mean brige?
mje13009 cant pout out more than 500 watt....

 

[Acca]

I think to use H bridge instead of half bridge on primary.In H you will get about 1kW or more with 13009