1kW smps project (based on MicrosiM design)

ludo3232

ludo3232

Member
New video + Hi res PDF of parts side.. all values are readable...

PCB of Protection card comming soon ...

[video=youtube;9i4EQG2_j8A]http://www.youtube.com/watch?v=9i4EQG2_j8A[/video]
 

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ludo3232

ludo3232

Member
Protection Board Schematics and PCB
 

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E

engel

New member
smps master's
thanks for sharing this nice project
and sg3525 is good choice not hard to find
does the core used by most pc psu rated in 400w is the one called etd49?
how about the core can be found in an old pc monitor?and some old crt tv's is this useful for this project?
 
MicrosiM

MicrosiM

Administrator
Staff member
engel said:
smps master's
thanks for sharing this nice project
and sg3525 is good choice not hard to find
does the core used by most pc psu rated in 400w is the one called etd49?
how about the core can be found in an old pc monitor?and some old crt tv's is this useful for this project?
Click to expand...

We can do something regarding those cores, I think they are ER39 or ER33 ones, they still can make 500W at least

If you have succeeded into splitting the cores without crashing them, show some pictures here, I might be able to help!

Dont forget that the PCB is Designed for ETD49!
 
MicrosiM

MicrosiM

Administrator
Staff member
terminaterx300 said:
oh. it is a big trouble for me. i cant find it in Vietnam and on mouser ,farnell or digikey.

I have a friend in European but in UK and distrelec not available in UK.what a pity

Now i find someone in Germany to buy it for me.
Click to expand...

Any other transformer with 20VAC 3 ~ 5VA output will do the JOB, even an external one!
 
R

rumsas

New member
ludo,
what is efficiency and switching frequency of that SMPS? why don't you use filtering inductor's at smps output ?
 
Last edited:
MicrosiM

MicrosiM

Administrator
Staff member
Transformer

@Khron

N27 core with 22 Turns at primary of current sense transformer

@Rumsas

230Vac Main
75Khz
Voltage with no load : 110V

4A load : 106V
8A load : 102V
12A load : 97V

Load are 424W - 816W - 1164W

Primary winding are 10 x 0.1mm wire

Secondary 15 x 0.1

Hope that helps

Inductors, they should improve performance, but ludo got a nice results!, but they can be added
I think he needs 15uh on -26 core material
 
K

Khron

New member
Thanks, MicrosiM, but that was a bit vague...

The "primary" of the current transformer should be that thick wire jumper, right?

So the current transformer "secondary" (that goes to the protection board) will need 22 turns around a... T50-sized ferrite toroid core?
 
MicrosiM

MicrosiM

Administrator
Staff member
Khron said:
Thanks, MicrosiM, but that was a bit vague...

The "primary" of the current transformer should be that thick wire jumper, right?

So the current transformer "secondary" (that goes to the protection board) will need 22 turns around a... T50-sized ferrite toroid core?
Click to expand...

100% correct

a Thick wire goes Through the core is the wire used to feed the ETD49

and the 22 Turns goes to the protection card
 
E

engel

New member
microism
the core i found in old tv and pc monitor are bigger than one found in pc psu,
will post picture soon
 
T

terminaterx300

New member
i have just finished my job. redrawing the pcb of ver2.1 :D



p/s just little modifying for looking. i think it is okie R#:
 
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