×
Follow Us
Results 1 to 2 of 2

non-sinusoidal waveform harmonic quantities

    #1
  1. J2019L is offline Junior Member Pro Subscriber
    Join Date
    May 2014
    Location
    Seattle, WA
    Posts
    7
    Reputation

    non-sinusoidal waveform harmonic quantities

    Do we have to find the harmonic quantities when we found non-sinusoidal waveform in power circuit? Or to find magnitude and phase angle? Is there anyone can explain it?

  2. #2
  3. Join Date
    Mar 2019
    Posts
    2
    Reputation

    Non-sinusoidal waveforms have harmonics, magnitude and phase angle

    Quote Originally Posted by J2019L View Post
    Do we have to find the harmonic quantities when we found non-sinusoidal waveform in power circuit? Or to find magnitude and phase angle? Is there anyone can explain it?
    Let me try to respond:

    A pure sine wave will only have the fundamental frequency and no harmonics. It will however have a magnitude and a specific phase angle at the specific measurement point.

    Any other waveform besides a pure sine wave will include harmonics. In fact even a perfect a square wave is an infinite summation of a fundamental sine wave and it's harmonics.

    All real-world power circuits will include harmonics, but you don't necessarily "have to find" them. They are normally not going to affect your equipment. Due to the load, magnitude, harmonics and phase angle will be introduced even if the source is a pure sine wave.

    For example, electric motors and VFD drives will produce phase angle and harmonics.

    You can use a Power Quality analyzer to measure such quantities.

    The following discussion may help you visualize the problem:
    https://electronics.stackexchange.co...do-they-appear

Subscribe

Login or register to leave a reply!


Share this thread

Related Topics

  1. How to locate harmonic currents?
    By AlexT90 in forum Electrical Testing Talk
    Replies: 2
    Last Post: June 14, 2017, 10:50 AM

Tags for this Thread



Related Content


Follow us


Explore TestGuy


NETA Certification Training


NICET Electrical Power Testing


Help and Support