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Golf Cart blows headlamps

Discussion in 'Electronic Design' started by Yzordderrex, Jun 11, 2013.

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  1. Yzordderrex

    Yzordderrex Guest

    My coworker told me that halogen headlamps blow on his golf cart. He
    asked me if there was something he could do to mitigate.

    I did a little research and found the bulb has a filament. I told him
    a NTC thermister may reduce surge at power on and help to prevent
    this.

    Am I on the correct track? Any other ideas?

    regards,
    Bob
    N9NEO
     
  2. All indcandescent bulbs burn out eventually. Presumably you mean they
    die faster than the rated lifetime? (Probably low triple-digit
    hours).
    Power-on surge is unlikely to significantly reduce the life. It just
    seems like that because they tend to fail at power-up when they were
    about to go anyway.
    Michael's idea is the #1 thing. The actual voltage on the bulbs
    compared to their rated voltage. Higher than rated voltage greatly
    reduces the life.

    Sometimes people use a voltage reducer module so they can use cheap
    12V bulbs on a 36V or 48V system. It's possible they fail with HV out
    if they're a buck converter.

    Vibration doesn't help either.. and lower voltage lamps tend to have
    sturdier filaments.
     
  3. Keep finger oils off the bulb, if it not in a sealed enclosure. This
    shortens the life span quite a bit.
    Halogens can last quite a long time even with rough handeling.

    Now on the other hand, those mini Krypton maglite 2AA cell bulbs are
    fragile.

    Cheers
     
  4. OldGuy

    OldGuy Guest

    And do not drive on bumpy roads with the lights on.
    Change to LED lamps.
     
  5. Guest

    What is the ANSI number of the headlamps? Usually this will be a
    three-digit or four-digit number, maybe with an "H" on the front. This
    will enable you to find the rated voltage, rated lifetime, etc. It also
    allows you to see if a "long life" version of the lamp is available.

    If this isn't already happening, buy lamps from a reputable manufacturer
    like General Electric, Philips, Wagner, or Sylvania. If it is a 12 V
    lamp, try the local auto parts stores for a good selection.
    Agreed. It might be interesting to hook up a voltmeter at the lamp
    terminals and check the voltage both standing still and while driving.
    The golf cart may regenerate into the batteries when coasting, which
    tends to raise the system voltage; depending on how the lamps are
    powered, this may also raise the lamp voltage.

    Also, try not to have the headlights on when the golf cart is plugged in
    to the charger; this may also raise the lamp voltage.
    Or, the manufacturer just wires the lamps across the "first" 12 V
    battery in the string. This is OK when the battery is being
    discharged, but might lose when the battery is being charged - it
    depends on the charging voltage.
    It may be worth checking to see if someone has replaced a rubber or
    spring mounting with a solid mount. You will probably need a parts
    diagram for the golf cart or assistance from a dealer to figure this
    out for sure.

    Matt Roberds
     
  6. gregz

    gregz Guest

    Gas or electric ? My gas does some flickering. Got LEDs.

    Greg
     
  7. josephkk

    josephkk Guest

    Maybe. Sounds like really out of specification transients are escaping
    the motor control system and getting to the headlights. Automotive
    headlights are generally pretty tough and can handle lots of guff, but the
    kicking they are getting is well beyond specification.

    ?-)
     
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