Overvoltage Protection

Discussion in 'The Projects Forum' started by danielb33, Jan 29, 2014.

  1. danielb33

    Thread Starter Member

    Aug 20, 2012
    105
    0
    I have 2 phase input separated by 90 degrees. Peak = 50V, but this can very by 5% or more depending on the electronics feeding the phase (which I cannot control). I am fine with up to 55V in, but at over 55V problems will occur.
    How can I prevent over 55V without regulators? Any clever simple cheap way to clip this at 55V? The cases where 55Vin occurs is slim to none, but I need to prevent it from ever happening. Thoughts?
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,554
    2,375
    What is the nature of the phases? Sine wave? Pulse etc?
    If so do you want to preserve the shape, if sine wave?
    Max.
     
  3. #12

    Expert

    Nov 30, 2010
    16,321
    6,818
    More importantly, what is the impedance of the supply of the voltage? You can't easily clip a sine wave coming from a five thousand watt generator.
     
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