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Old 29th August 2012, 09:17 AM   #21
stewin is offline stewin  Kenya
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hi ap2 pls post photos of your project.
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Old 29th August 2012, 10:02 AM   #22
AP2 is offline AP2  Italy
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Hi, old model with IR21531D.
also other with EE-42H.

regards
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Old 29th August 2012, 10:28 AM   #23
AP2 is offline AP2  Italy
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find old photo.
700w quiet low emi and low hf at output.
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Old 29th August 2012, 07:12 PM   #24
stewin is offline stewin  Kenya
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very impressive really neat work. i am seeing an aux former is it to drive the ir2153 .?

i will build this smps but i will use irfp460 i will post pcb files . thanks ap2 . i am hoping this smps will reach 1.2 kwts.
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Old 29th August 2012, 07:48 PM   #25
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If the SMPS isn't go to a regulated form, the output choke isn't necessary, and then can eliminate it, but adequate secondary transformer secondary.

If you still want tu use it, be careful that both magnetic fields (From positive and negative rails) must add together.
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Old 30th August 2012, 06:30 AM   #26
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AP2.....we spoke before.....you said you would do coupled output inductors.....but in your above pic i see two separate output inductors?
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Old 30th August 2012, 11:31 AM   #27
AP2 is offline AP2  Italy
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I think, that "ignorance" is luck for some company
This i use are pi hf filter,output have very low hf spurius.
it's not a integrator as regulated pwm supply need eg. as toroidal output.
this old smps play on fixed pwm.
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Old 30th August 2012, 06:51 PM   #28
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Thanks AP2, but if those arent separate output inductors lying horizontally at the output side of the board, then where are the output inductors?....and if its a LLC converter and doesnt have output inductors.....then what are those two inductors......they are power inductors...they are not ferrite bead type inductors.

Also, when its doing 700W, whats the ripple current in the input electrolytics?.......and what are the mains harmonic currents?
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Old 1st September 2012, 03:39 PM   #29
AP2 is offline AP2  Italy
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Maybe help someone, zip contain small exe for turn/voltage of trafo for this smps or similar.
unzip and change extension to .exe
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Old 1st September 2012, 03:42 PM   #30
AP2 is offline AP2  Italy
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1-set Main ac voltage
2- set turn on primary (it show frequency)
3- turn's of sec.
it show voltage output (include 100mA load). absolute precise.
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