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Thread: 1000w smps based on LUDO3232

  1. #91
    diysmps Senior Member Silvio's Avatar
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    Quote Originally Posted by behrad View Post
    mr silvio
    relay 12v/8a is double or single?
    I used a double one because that I had in my junk box. If you have a single contact relay it will do the job just the same as long as it can handle the current in the input (5-6 Amps)

  2. #92
    diysmps Senior Member Silvio's Avatar
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    Quote Originally Posted by behrad View Post
    For aux supply i did not find 15 or 18 volt smps adaptor in my local city
    But i find 24v/1a
    Can i use it without any problem?
    For the auxiliary supply power up to 300-500 mA is enough. For the voltage I think 24v will be too much so 12v will have to do. If you want you can make a simple small psu if you have a 14vac trafo from an old radio or something else. It will only need a small bridge and a smoothing capacitor followed by a 7815 IC regulator. Anyway I leave that to your choice.

  3. #93
    diysmps Member
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    i find 2 mistake in ur schematic
    1)in one schematic middle output di
    ode pins is connected to top but in another schematic not connected to top line
    which one is right?
    5.jpg4.jpg
    2)also r14 resistor in schematic is 10k but in pcb is 220ohm
    33.jpg222.jpg
    for auxillary power smps output negative line is connected to input negative line?is this correct????
    89.jpg
    also in first i made input line filter
    the parts are one input line inductor+470nf and 330nf 275volts caps
    is this enough?
    IMAG0058.jpg
    Last edited by behrad; 11-03-2017 at 11:12 PM.

  4. #94
    diysmps Senior Member Silvio's Avatar
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    BUG fix

    1) Diode bridge the pic on the right is the right one. (the middle diodes should not be touching the top trace)

    2 R14 is 10K ohm in the component layout the color is correct but the value written is wrong. It should be 10K

    3) Your markings are correct, where marked IN is the positive bus supply 310vdc. Note both auxiliary and smps share a common ground. (12v auxiliary negative is connected to the bus negative) This is correct as both share a common ground

    4) The input filter is ok but if you use same value caps at both ends it will work better

    emi filter.JPG

    5) The filter inductor must carry the full load so a 5 amps rating is needed. I cannot see wire size but some self judgment from your end will let you know.

    regards Silvio

  5. #95
    diysmps Senior Member Silvio's Avatar
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    The final results for the 1000w smps

    Trafo ETD 49 N87 Material Maximum output voltage 80-0-80 at 242vac Auxiliary voltages 15v-0-15v @ 500mA

    New winding turns Primary 18 turns Secondary 9-0-9 turns Ratio 1:1 Bmax 1600g

    Ampere turns Primary 2 bundles of 4 wires 0.5mm dia twisted Secondary 2 bundles of 4 wires 0.5mm twisted

    Current density 6 amps per mm˛ (2 bundles as above cross sectional area 1.57mm˛)

    Total power absorbed 1216W Total power input 1383W Efficiency 87.9%
    Input voltage 233v output voltage 143vdc

    Temperature Readings at an ambient temperature of 16 deg C

    Result after 1 hour of operation No Fan used

    input ACV 237 output voltage 158v load 60watts

    core temp =32 deg
    copper temp =35 deg
    input bridge= 32 deg
    heatsink = 30 deg
    SG3525 =35 deg
    IR2110 =38 deg

    Continued test with more load No fan used for further 15 min


    Input voltage 230vac output voltage 144vdc load 749 watts

    core temp =32 deg
    copper temp =36 deg
    input bridge= 65 deg
    heatsink = 52 deg
    SG3525 =37 deg
    IR2110 =40 deg

    Continued test with more load and FAN ON for further 15 min

    Input voltage 229vac output voltage 138v load 938 watts

    core temp =35 deg
    copper temp =38 deg
    input bridge = 74 deg
    heatsink = 26 deg
    SG3525 =27 deg
    IR2110 =29 deg

    IMG_0909.JPG

    SMPS at 1170 watts
    Last edited by Silvio; 12-10-2017 at 02:53 PM.

  6. #96
    @Silvio

    Very nice results after hard work.

    Good luck
    www.diysmps.com & www.Micro-Audio.com

  7. #97
    diysmps Senior Member Silvio's Avatar
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    Thank you MicrosiM, If it was not for this website and all those who contributed with good answers to others on various treads that I read, I would not have been able to produce this smps. I learnt a lot of things about power electronics and also how to make safe transformers and pcbs. I hope I will be able to contribute the same way as I benefit from this website.

    Regards Silvio

  8. #98
    Happy Year 2018 Silvio!

    Best regards,
    Albert

  9. #99
    diysmps Senior Member Silvio's Avatar
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    Happy New Year 2018 to All the members of DIY SMPS

    Best Regards

    Silvio

  10. #100
    Happy new year 2018
    www.diysmps.com & www.Micro-Audio.com

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