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Thread: 1000w smps based on LUDO3232

  1. #341
    diysmps Senior Member
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    Quote Originally Posted by Silvio View Post
    Turns for EE55 full bridge 230v = 19 turns (72Khz) B max at 245v 1450 guass

    Turns for EE65 full bridge 230v = 15 turns (72Khz) B max at 245 v 1450 guass

    Silvio
    Thank you for your answer, Mr. Silvio ... I use PFC with 350 volts on the primary voltage

  2. #342
    .... Silvio's Avatar
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    Upik

    Please tell me core material if you know it as turns will differ with different cores. However for N87 material the number of turns are as follows.

    EE 65/32/27 Input voltage 350vdc Frequency 72 Khz approx rated transformer power 7.5KW Turns primary 14 (full bridge) B=1320g

    EE 55/28/21 Input voltage 350Vdc frequency 72 Khz approx rated transformer power 3Kw Turns primary 20 (full bridge) B= 1320g

    Never go beyond the rated transformer power in your design. However for the EE55 calculate a peak of 2800 watts and for the EE65 well this is good for a welding set at that power.

    You can assume the same turns for PC40 however this material is better.

    About your PFC circuit which one are you going to use, can you post the schematic?
    Last edited by Silvio; 10-05-2018 at 09:42 PM.

  3. #343
    diysmps Senior Member
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    I don't know what type of core I am using, I get ee65 and ee55 from used items. There is no clear information about the core used, I don't have a scheme for that.
    FB_IMG_1534130688473.jpg

  4. #344
    diysmps Senior Member
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    I did not make my own pcb, I bought a pcb product that was ready to install the component

  5. #345
    .... Silvio's Avatar
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    Quote Originally Posted by Upik View Post
    I did not make my own pcb, I bought a pcb product that was ready to install the component
    Well it looks very nice I hope everything goes well and works.

    Good luck

  6. #346
    diysmps Senior Member
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    hi Mr.Silvio ,, do you have transformer calculation calculator software for full bridge topology, ??

  7. #347
    http://www.diysmps.com/forums/showth...-and-inductors

    The link labeled "ExcellentIT(7100).rar" is a program that can calculate for Push-Pull, Half-Bridge, and Full-Bridge. You can use 3 different types of secondary rectifier. Regulated or unregulated supply. The program has quite a few choices for ferrite cores, but you can add custom cores if you need to.

    The software is pretty close. I've done the math before by hand and it's quite good.

  8. #348
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    Quote Originally Posted by Upik View Post
    hi Mr.Silvio ,, do you have transformer calculation calculator software for full bridge topology, ??
    The software I have is like Blasphemy000 suggested

  9. #349
    diysmps Senior Member
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    thanks for all, it turns out I already have it ,,

  10. #350
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    is my calculation correct ...?DSC_0605.jpg

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