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Power supply burned

Discussion in 'Electronic and hardware generally' started by gigi, Apr 10, 2015.

  1. gigi

    gigi Active Member

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    Hallo to everyone!
    my problem:
    For my sim I use THESE MOTORS (mine with 50:1 ratio):http://www.ebay.it/itm/351066992384?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 ,
    2 BOARDS Pololu jrk12v12, and these 2 POWER SUPPLY: http://www.ebay.it/itm/ALIMENTATORE...sori_da_videosorveglianza&hash=item4d09f285df

    It's the third time that under certain conditions the game with highly stressed engines burning one of the power supplies: How can avoid this problem? The power supply do not have a fuse. Do yo suggest to put on wire + current from power supply to cards Pololu? what amperage fuse?
    Or there's another solutions ( for example better configuration of pololu board jrk12v12)?
    thanks for your help
    gigi
    gigi, Apr 10, 2015
    #1
  2. Daguru

    Daguru Rally drivers do it in the Dirt

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    Hi @gigi
    Do you have a wiring diagram on how you have it setup ?
    Daguru, Apr 10, 2015
    #2
  3. gigi

    gigi Active Member

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    this is the wiring diagram
    jrk to wiper wireup fixed.JPG
    gigi, Apr 10, 2015
    #3
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    noorbeast, Apr 10, 2015
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  5. gigi

    gigi Active Member

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    highly stressed engines mean that in my games (rbr or assetto corsa) i like a setup of the sway and heave very responsive and fast. In some traks the motors move really fast and change direction very very fast
    gigi, Apr 10, 2015
    #5
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Setting fast motor responses is pretty normal @gigi, I thought that you may have meant the motors were getting really really hot, which may indicate a design or electrical issue.
    noorbeast, Apr 10, 2015
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  7. gigi

    gigi Active Member

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    The motors never been hot. Probabluy my setting ii two hard. but I'm not understend why the power supply burns. The pololu required 30A peak and the power supply are at 50A. The problem is that power supply don't have a fuse. Do you think that a can avoid to burn the power supply putting a fuse on the wire from this to board Jrk12v12. If yes how many Ah the fuse?
    gigi, Apr 10, 2015
    #7
  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    A fuse is a good idea and cheaper than a PSU, but I suspect there is something fundamentally wrong if PSUs are burning out.

    The JRKs do have a max current limit setting.

    What watts are the PSUs rated at?
    noorbeast, Apr 10, 2015
    #8
  9. gigi

    gigi Active Member

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    gigi, Apr 10, 2015
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  10. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    Fuse is not really a solution: you cannot change fuse while driving each time to drive through a bumpy track part... ;)

    Probably better to wire a battery in paralell
    • Like Like x 1
    Last edited: Apr 10, 2015
    RacingMat, Apr 10, 2015
    #10
  11. gigi

    gigi Active Member

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    You suggest to out in parallelo the two power supply 12v wire?
    gigi, Apr 11, 2015
    #11
  12. gigi

    gigi Active Member

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    Sorry bad english. You suggest to put in parallel the two power supply wire 12volt?
    gigi, Apr 11, 2015
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  13. bsft

    bsft

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    I run 40 amp PSU per motor with no problems, so not sure on that one.
    Put a car battery on to power both JRKS and see how it goes.
    Also, post up screen shots of your JRK tabs please.
    • Like Like x 1
    bsft, Apr 11, 2015
    #13
  14. gigi

    gigi Active Member

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    Sorry for bad Quality
    20150412_122337.jpg 20150412_122330.jpg
    20150412_122315.jpg 20150412_122323.jpg
    gigi, Apr 12, 2015
    #14
  15. gigi

    gigi Active Member

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    Another photo
    20150412_122248.jpg
    gigi, Apr 12, 2015
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  16. bsft

    bsft

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    Raise intergral limit from 2000 to 10000 , otherwise, apart from everything else looks ok.
    Try a car battery powering them both.
    bsft, Apr 12, 2015
    #16
  17. Boomslangnz

    Boomslangnz Active Member SimAxe Beta Tester Gold Contributor

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    Are you using 1 power supply per motor? If you are then I would suggest trying different power supplies. Perhaps cheap Chinese ones aren't that good or such. A fuse properly wouldn't work that well as there isn't sustained constant load on it so Im doubtful it would blow due to overloading anyway as fuses are designed to handle overload for a small period
    Boomslangnz, May 9, 2015
    #17
  18. gigi

    gigi Active Member

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    Yes i use 1 power supply per motor
    gigi, May 11, 2015
    #18
  19. Mitchell

    Mitchell Member

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    It is always a good idea to fuse the motors..
    • Agree Agree x 1
    Mitchell, Jun 1, 2015
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  20. Martin van Hagen

    Martin van Hagen not trying brings you nothing! SimAxe Beta Tester Gold Contributor

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    If it is not the same power supply that "goes to toast" then it could be poor design of the DC power supply, meaning no over-current and/or under/over voltage protection . Try to run both power supplies in parallel but make sure that both power supplies are on the same voltage level so the load is evenly spread. If not the highest power supply will take all the load and will follow the previous three supplies in the "Electronics Wallhalla". In the parallel configuration the load can be divided across both power supplies which might lengthen the life span. Concerning the idea of installing fuses it would not make much of a difference to the power supply and is mainly to protect the wiring/user(s) fed of it to the Motor controller, which should always be able to manage the maximum current from the supply or fuse if any installed.
    Martin van Hagen, Jun 4, 2015
    #20