ac to dc

Discussion in 'General Electronics Chat' started by daddy1, Nov 22, 2008.

  1. daddy1

    Thread Starter New Member

    Nov 22, 2008
    4
    0
    how do i convert ac 12v from a stater to dc 12v by use of a rectifier and 1000 uf capaciter
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
  3. daddy1

    Thread Starter New Member

    Nov 22, 2008
    4
    0
    a stater is a power generator installed on the cam of a gas motor when spun creates ac voltage we need dc voltage to power light on a dirt bike
     
  4. scubasteve_911

    Senior Member

    Dec 27, 2007
    1,202
    1
    I think you mean 'stator', which is a part of an electric motor/generator.

    Steve
     
  5. daddy1

    Thread Starter New Member

    Nov 22, 2008
    4
    0
    sorry electrician not a good speller and yes a stator
     
  6. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    If it's a filament lamp, it's perfectly happy with AC or unfiltered DC.
     
  7. floomdoggle

    Senior Member

    Sep 1, 2008
    217
    2
    Hey Big Daddy,
    Try a bridge rectifier from Radio Shack. They have all kinds of them, and the hook-ups on their web site. The capacitor goes after the rectifier. Happy hunting.
    Dan
     
  8. daddy1

    Thread Starter New Member

    Nov 22, 2008
    4
    0
    ac to dc.jpg


    is this correct
     
  9. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    I'm afraid that won't work.

    See the attached.
     
  10. DrNick

    Active Member

    Dec 13, 2006
    110
    2
    If the lamp is just a regular light bulb, why not just power it with AC (as beenthere has already suggested)? If the frequency is 60 Hz or higher you wont be able to tell the difference between your dirt-bike lamp and the lights you have at home.

    Also as connected in your drawing, it will "work." It is just a waste of power. The capacitor will couple the AC and act like a low resistance across the terminal, drawing unnecessary power from the PMG (i am assuming you are using a permanent magnet machine), then the diode will just half wave rectify the stator voltage...doing nothing for you.

    However if you want to just use those 2 components and you REALLY REALLY want DC (with poor ripple), put the capacitor on the other side of the diode. If the frequency out of the stator is high enough, full wave rectification is not necessary.
     
Loading...