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3 Phase VSC SPWM (Triple-n harmonics)

  1. Dec 8, 2012 #1
    Why is it that we accept triple-n harmonics in the output voltage spectrum of VSCs?

    Assume we are using SPWM where the frequency modulation index is selected to be a large odd integer multiple of 3.

    Thanks again!
     
  2. jcsd
  3. Dec 8, 2012 #2
    Sorry I don't understand the acronyms.

    In case this is three-phase current, triple-n harmonics cancel out naturally.
     
  4. Dec 9, 2012 #3
    Sorry about the acronyms, I thought they were commonly used.

    VSC = Voltage Source Converter

    SPWM = Sinusoidal Pulse Width Modulation

    Can you explain further how the triple-n harmonics cancel out naturally? And by "triple-n" do they just mean the harmonics that are integer multiple of 3?
     
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