PSpice help

Discussion in 'Homework Help' started by HerbyFour, Dec 2, 2013.

  1. HerbyFour

    Thread Starter New Member

    Dec 2, 2013
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    Hi,
    As part of a project on inverters for college i have simulated the harmonics of the line voltage.

    The theory states that there should be no 3X harmonics as they are in time phase of each other. In other words they cancel each other out.
    When i use the FFT function i get around 500mv for the 3rd, 9th, 15th. . .
    harmonics.

    Why is this?

    Thanks.
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    What are you using it on?
     
  3. HerbyFour

    Thread Starter New Member

    Dec 2, 2013
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    It's an orcad Pspice A/D simulation.
     
  4. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Is this 'line voltage' the incoming mains?
     
  5. MikeML

    AAC Fanatic!

    Oct 2, 2009
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