1kW smps project (based on MicrosiM design)

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borysgo2

New member
I am doing unregulated one but I would like to improve the life of the output capacitors while the current should be smoothed out with the inductors (I think). But I do not know how to calculate them correctly.

Big thanks.
 
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badboy_6120

Member
Hi

I'm back with some pictures

Picture 01 is from Pin 11 of SG3525 (without IR2110 installed)

Picture 02 is from Pin 14 of SG3525 (without IR2110 installed)

Picture 03 is from Pin 11 of SG3525 (with IR2110 installed)

Picture 04 is from Pin 14 of SG3525 (with IR2110 installed)

Picture 05 is from Pin 1 of IR2110

Picture 06 is from Pin 7 of IR2110

Picture 07 is from the board


All Signals above is according to the ground (pin 12 of SG3525)
 
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badboy_6120

Member
MicrosiM said:
Yes you can solder the mosfets. But show waves at G of mosfets. Not connected 220vac
Click to expand...

Hello Microsim

Don't worry

I don't connect the SMPS to 220Vac unless you tell me

I also have a transformer with 40-0-40 volts

also how much power can I get from this power supply??

I want to power my two 500W sub amplifire and two 200W music amplifier

1400W needed at least

I do have ETD59

Do I need to use that for that much power???

Thanks in advance
 
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badboy_6120

Member
MicrosiM said:
Yes you can solder the mosfets. But show waves at G of mosfets. Not connected 220vac
Click to expand...

Here is the pictures of oscilloscope connected to Gate of mosfets

Picture 08 and 09 are from the gate of mosfets

Picture 10 is from the board with mosfets connected

How about it????

08.jpg

09.jpg

10.jpg

Measurement above is according to the ground
 
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badboy_6120

Member
Dear Microsim

I'm planning to obtain +-80V and +-50V from output
Can you please give me the turns and thickness of primary and secondaries for ETD49 (If 1400W is not possible with this core, please give the information for ETD59)

I have 0.1 mm wire to make Litz wire

Thank you in advance
 
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badboy_6120

Member
Dear Microsim

I want to do my ETD49 transformer as below:

1/2 primary >> 11 turns
1/2 Secondary >> 13 turns
1/2 Secondary >> 13 turns
1/2 Primary >> 11 turns

My goal : 80-0-80 Volts

I'm gonna use 10*0.1mm for primary and 15*0.1mm for secondary

but the thickness of this much wire seems a little low to me for this much power

I attach a picture of primary wire that I made
Is this ok?

11.jpg
 
MicrosiM

MicrosiM

Administrator
Staff member
badboy_6120 said:
Dear Microsim

I want to do my ETD49 transformer as below:

1/2 primary >> 11 turns
1/2 Secondary >> 13 turns
1/2 Secondary >> 13 turns
1/2 Primary >> 11 turns

My goal : 80-0-80 Volts

I'm gonna use 10*0.1mm for primary and 15*0.1mm for secondary

but the thickness of this much wire seems a little low to me for this much power

I attach a picture of primary wire that I made
Is this ok?

View attachment 5379
Click to expand...


That's thin, I would recommend at least 30x0.1mm for 500w
 
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badboy_6120

Member
Hi microsim

I couldn't find enough 0.1mm wire for that much turns
so I've used 0.25mm wire as below:

primary : 22*0.25mm
secondary : 32*0.25mm
 
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badboy_6120

Member
Pictures of D-S of the fets while smps connected to the 80Vac isolation transformer

13.jpg
14.jpg


Picture from the primary of transformer without any load connected
15.jpg




Picture from the primary of transformer with 1A drew from the output
16.jpg
 
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