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Thread: 1kW smps project (based on MicrosiM design)

  1. #1311
    diysmps Member CDJKuznec's Avatar
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    Voltage input on my SMPS be AC220v.

  2. #1312
    diysmps Member CDJKuznec's Avatar
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    Hello MicroSim. Can you help me?
    It is my work: 235138680_332779.jpg

  3. #1313
    diysmps Senior Member Silvio's Avatar
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    Quote Originally Posted by CDJKuznec View Post
    Hello sir MicroSim. Help me please.
    I make smps xp-5000. I have 4 transformers e55/28/21core.
    1) How there is a lot of turns for primary it is necessary for me? I will reel up a copper strip.
    2) How there is a lot of turns for secondary for +/-85v? How many volts will be 1 turn secondary?
    3) What frequency of work of kHz will e55/28/21 kernel have if the small operating transformer is assembled 200 turns and 2 on 20 turns?
    For a core EE55 N87 material frequency 70Khz.

    You need to check operating frequency and see that is between 70 and 80 Khz

    Your type of smps is self oscillation with small transformer

    For input voltage of 210-230-245 Primary turns 9

    Primary inductance is 0.517mH

    secondary turns for output voltage of 77v-84v-90v = 5 turns

    smps not regulated so voltage vary according to input voltage

    The voltage on secondary is the peak voltage without load

    Volts per turn is according to input voltage AC so for 230v input the bus voltage DC = 230 x 1.414 = 325v /2 = 162v

    so 162v / 9 turns = 18v per turn

    Rated transformer power is 3500w

    Output power is 2040w at 170v 12amps

    Regards

    Silvio

  4. #1314
    diysmps Member CDJKuznec's Avatar
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    Silvio, very big thanks you. I will work on this project. Can i ask some questions to you? Please, sorry me for my bad english, and google translator.
    Last edited by CDJKuznec; 06-13-2018 at 08:57 PM.

  5. #1315
    diysmps Senior Member Silvio's Avatar
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    Yes you can ask questions I will help you the best I could

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