13.8V 10A Smps [Test ok] - diyAudio
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Old 24th December 2006, 12:20 PM   #1
gev is offline gev  Turkey
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Default 13.8V 10A Smps [Test ok]

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Old 24th December 2006, 12:41 PM   #2
edl is offline edl  Hungary
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Hi,

PCB in PDF format.
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File Type: pdf 138v_10a_2.pdf (28.0 KB, 281 views)
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Old 24th December 2006, 12:43 PM   #3
edl is offline edl  Hungary
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Parts on PCB in PDF format.
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File Type: pdf 138v_10a.pdf (47.4 KB, 218 views)
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Old 24th December 2006, 01:16 PM   #4
gev is offline gev  Turkey
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tanks edl

pbc view and print program
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Old 24th December 2006, 01:55 PM   #5
luka is offline luka  Slovenia
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Have you builded and tested it?
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Old 24th December 2006, 02:04 PM   #6
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Default Re: 13.8V 10A Smps [Test ok]

Quote:
Originally posted by gev
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Hey, What's the argument???

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Old 24th December 2006, 02:12 PM   #7
luka is offline luka  Slovenia
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Now I see the pictures finally. Seems to be working , Great work. What is its max power,even if some changes were needed?

Feedback is doing its job, could I see some output scope picture under heavy load?
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Old 24th December 2006, 03:00 PM   #8
edl is offline edl  Hungary
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It performs well with AT/ATX PC-PSU's main and driver transformer. They are cheap and available.
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Old 24th December 2006, 03:06 PM   #9
luka is offline luka  Slovenia
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How is main trafo winded, turn-ratio?
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Old 25th December 2006, 04:58 AM   #10
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Quote:
Originally posted by luka
How is main trafo winded, turn-ratio?
Luka:

The calculation to wind a pwr transformer is complicated, you have to know the lamination magnetic flux, otherwise take this simple equation.

volt per turn = winding cross section X K.
winding cross section = the centre E of the lamination W X L.
K is constant, depends on the quality of the lamination, usually is 9.00. for general quality. If higher, use 8 or 7. Try to flip a piece of lamination, see how many flips till it breaks, if 3 times, take K=7, if 5-6 flips, take K=8, the rest take K=9.

eg. pri = 220V, sec = 24v2A

Therefore: pri = 220 X 9 = 1980T
sec = 24 X 9 = 216T

220V at 48 watts + 2% eff lost = 50W.

Check from wire gauge table on 220v = 0.218A = ? AWG
24V = 2A = ? AWG
The input + loss make it .22A

Select the wire from the gauge stated, and start your winding.

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