SCR and Transients

Discussion in 'Homework Help' started by Vincent_Murray, Jun 26, 2011.

  1. Vincent_Murray

    Thread Starter New Member

    Mar 24, 2011
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    Please help me with this question

    Transients are at their worst when the SCR is switched on at

    A) 30 °

    B) 45°

    C) 90

    D) 180°
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    Translation for math impaired people: Where is the slope of the sine wave closest to being a vertical line?
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    I think bertus meant where will the voltage step be the largest when the SCR is switched. That is the point that will cause the largest transient.
     
  5. Vincent_Murray

    Thread Starter New Member

    Mar 24, 2011
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    0
    Hi

    Thank you for your responses no additional information was given on this exam question
     
  6. Adjuster

    Well-Known Member

    Dec 26, 2010
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    You have to make an assumption about your supply voltage waveform, e.g. that it is a sine wave with zero phase shift: V=0 at 0° angle. Having done that you can answer the question.
     
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