Electronic Ignition Transformers

Discussion in 'General Electronics Chat' started by Hrishikesh Rokade, Mar 26, 2016.

  1. Hrishikesh Rokade

    Thread Starter New Member

    Mar 25, 2016
    18
    1
    Dear All,

    On what parameters does the power of an electronic ignition transformer depend ? In the specification sheet, i see the following for an ignition transformer of Make BERU as the following
    upload_2016-3-26_17-45-52.png

    There is an Ignition Transformer of another manufacturer, which has the following specifications. We use EBI4 CM model for our application.

    upload_2016-3-26_17-48-11.png

    Question : How can we say which one of these two is a powerful Electronic Ignition Transformer ? Which parameters govern the Power of an Ignition Transformer and the spark it creates ? What is the typical efficiency of an Electronic Ignition Transformer ?

    Thanks in Advance,
    Warmly,
    Hrishi
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,998
    745
    One has two 7.5kv outputs, the other has 1 12kv output. Same input rating and current.
     
  3. Hrishikesh Rokade

    Thread Starter New Member

    Mar 25, 2016
    18
    1
    The other transformer too has a rating of 2*7.5kW with 30mA rms . How do we compare which one is powerful having a look at the specifications ?

    Hrishi
     
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,998
    745
    The single output one will give a bigger spark.
     
  5. Hrishikesh Rokade

    Thread Starter New Member

    Mar 25, 2016
    18
    1
    Why ? Any specific logical reason ?
     
  6. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,015
    1,531
    Because they are used for a different style of spark gap. Chose one to fit the requirements of your situation. This is what you need to do for any non-standard use of any device. Only you, the builder/experimenter can chose a device for your specific needs.
     
  7. BR-549

    Well-Known Member

    Sep 22, 2013
    2,004
    394
    Higher Voltage = longer spark.
     
  8. Hrishikesh Rokade

    Thread Starter New Member

    Mar 25, 2016
    18
    1
    Does anyone know a good source on the Internet to read about electronic ignition transformers ?
    Thanks
    H
     
  9. tcmtech

    Well-Known Member

    Nov 4, 2013
    2,039
    1,667
    Being solid state driven units their efficiency is going to be around 85% or higher.

    As for output they are constant current so their output voltage will vary with how the size of the arc and the air currents it is working in.

    The dual 7.5 KV unit would be the same output as a standard center tapped 15KV 30 ma neon sign transformer. The 12 KV is likely either a center tapped unit as well but not listed as such or a dedicated 12 KV single output for a single electrode spark gap type ignition system like some fuel oil furnaces and larger portable torpedo type heaters use.

    As for which is better, to be honest in all practical spark ignition applications you would likely see no difference.
    The only difference you could see would be if you were running neon lighting with them and had to run a long set of tubes. The higher voltage one would give you a bit more stable light output.
     
  10. Hrishikesh Rokade

    Thread Starter New Member

    Mar 25, 2016
    18
    1

    Thanks TCMTECH,

    Since that we know the efficiency of these transformers and also know the input power consumed , we can always calculate the output power. Using this method can we always predict and say which electronic transformer is more powerful (VA rating) ?

    Hrishi
     
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