Starting Engine

Discussion in 'General Electronics Chat' started by cruzerrain, May 24, 2009.

  1. cruzerrain

    Thread Starter New Member

    Mar 14, 2009
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    Can I start an Engine by an AC Power Line input to replace Lead-Acid Batteries?
     
  2. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    In theory, yes. In practice, you will have to make some changes to the starting system, running system, and/or the AC lines power.

    Can you give more details? One obvious thing is that the engine may require a battery to run. If it does not, then things are simpler. I have started small, magneto-equipped gasoline engines with an electric drill run from the AC mains.

    John
     
  3. cruzerrain

    Thread Starter New Member

    Mar 14, 2009
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    can i use a rectifier to adjust the voltage and current so it's the same with the lead acid battery?
     
  4. Mike Mandaville

    Active Member

    May 27, 2009
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    1
    In an emergency, I once used a battery charger to start my car. My battery was overdue for a replaacement, and was still in the car. Done repeatedly, this will ruin the charger. White's Auto Supply used to sell a unit which was specifically designed for this purpose. Maybe they still do. If I am not mistaken, I think that a typical automobile alternator requires a battery to energize the field coils, though.
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    They do make chargers that are rated for that, but a battery is much better for the application.
     
  6. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    It is quite common in aircraft to have an external auxiliary power plug for starting. The starting units are often fuel powered generators, but line-powered charger/starters are also used. My Sears starter provides a starter boost setting.

    John
     
  7. HarveyH42

    Active Member

    Jul 22, 2007
    425
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    My battery charger has a 10 amp boost setting, works for starting. You don't need the battery once the engine is running. I'm sure everyone has push-started a car a least once in their life, although never tried it with no battery at all, just extremely dead. You can also drive with a bad alternator, but kills the battery...
     
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