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Thread: 4000w 12v

  1. #1

    4000w 12v

    12V; 4000W; efficiency better than 0.95 at full load.




    4000w_1.jpg4000w_2.jpg4000_pfc.jpg4000_vad.jpg4000_pwmo.jpg

  2. #2
    .... Silvio's Avatar
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    What are you going to use this for?

  3. #3
    servers, telecommunication, crypto mining...

  4. #4
    diysmps Member* res_smps's Avatar
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    4000W / 12V = 333A, wow

  5. #5
    .... Silvio's Avatar
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    Quote Originally Posted by kaspich View Post
    servers, telecommunication, crypto mining...
    Quite some current there at 300 amps. What was your test load? Starting a truck engine maybe?

  6. #6
    load_1.jpg
    10 pcs of load modules like this. With forced cooling, of course.

  7. #7
    .... Silvio's Avatar
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    Quote Originally Posted by kaspich View Post
    load_1.jpg
    10 pcs of load modules like this. With forced cooling, of course.
    It looks like 2 X 400w 8 ohms audio dummy load.

    We would love to see a video with the load test
    Last edited by Silvio; 11-01-2018 at 07:12 AM.

  8. #8
    These load modules were made especially for this project, but can be used for amp testing too, for sure. Each resistor has the rated power of 50W, so, 8pcs = 400W.
    Guys, I am developing devices, I am not a filmmaker I found just one pic from the testing process. As I remember - right before the load was connected.
    On the scope - signals of 400/12V module PWM; signals of synchronous rectifier's.testing_1.jpg

  9. #9
    diysmps Member* res_smps's Avatar
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    so the 4000w load test has never been tried?
    I was curious how hot the mosfet was to pass 300A+ current
    300A at 1 mOhm (assuming rds on) produces 90W dissipation, what mosfet do you use?

  10. #10
    why? for sure, a module was tested at full load.
    9 pcs of IPP034NE7 per side were used.

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