Concept of Harmonics !

Discussion in 'General Electronics Chat' started by Abdul Wali, Mar 30, 2016.

  1. Abdul Wali

    Thread Starter Member

    Mar 19, 2016
    Hi, please help me with the following questions !
    can we say that harmonics are because of Reactive Power (i know that one way of controlling harmonics is filtering) ? IF YES, can we control Reactive power by increasing Power Factor ? IF YES it means Harmonics can be controlled by increasing Power Factor ? Does Harmonics occurs by supplying a pure DC current to non linear load ?
  2. SLK001

    Senior Member

    Nov 29, 2011
    I would say "NO" to all of your questions.
  3. alfacliff

    Well-Known Member

    Dec 13, 2013
    harmonics are the result of distortion. not reflected waves due to impedance missmatch.
    there are no harmonics in a pure dc circuit.
  4. mcasale

    Active Member

    Jul 18, 2011
    If you have any type of periodic waveform, say at a frequency of F, then it can be expressed as a sum of sines and cosines, of different amplitudes of harmonics of F. It also may include a DC component. This is called a Fourier series of that arbitrary waveform.

    It is also true that if you distort a pure sine wave - say by clipping it, it will contain harmonics of that sine wave.

    A periodic square wave has lots of harmonics.