Step Down Transformer (Foysal1271)

Discussion in 'The Projects Forum' started by Foysal1271, Feb 22, 2016.

  1. Foysal1271

    Thread Starter New Member

    Feb 22, 2016
    3
    0
    Hay guys I need yours help. I want built a step dawon 12-0-12, 10 amps transformer. But problem is I don't know the formula. So any buddy can be help me
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,507
    2,367
    The whole transformer from scratch or modify one?
    Max.
     
    Foysal1271 likes this.
  3. bertus

    Administrator

    Apr 5, 2008
    15,645
    2,344
    Foysal1271 likes this.
  4. Foysal1271

    Thread Starter New Member

    Feb 22, 2016
    3
    0
    Sir.
    I can't get yet any solution pls help me
     
  5. tcmtech

    Well-Known Member

    Nov 4, 2013
    2,034
    1,626
    The simplest way would be to get an already made off the shelf unit from an old 12 volt automotive battery charger.

    The vast majority of them are designed around a simple 12 - 0 - 12 secondary winding.
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,507
    2,367
    For modifying your best bet is a Toroidal of the required Va, they are very simple to wind a secondary on if you have one with one with a primary suitable for your local power.
    You can find the Turns/v from a secondary already present.
    Max.
     
  7. #12

    Expert

    Nov 30, 2010
    16,252
    6,751
    This job is a gigantic PIB. You have to start with the qualities of the core material, figure how many pounds of core you need for the watts, the number of turns in the primary for your local voltage, allowing for the power line to be +/- 5%, then the secondary turns allowing for efficiency losses in the core, and wire gauge. It takes a lot more than one formula to do all this. Do you even know where to buy the core? I don't.

    Either get a transformer made for this job or at least get a core that has the right primary on it.
     
Loading...