Harmonics

Hi Anurag, by now you would have realised that the spelling is "Harmonics" and you can google for that one.

The ineffectiveness of a generator ,oscillator or any signal generator to produce perfectly sinusoidal wave with no side higher order frequency components lead to the rise of what we call harmonics.The harmonics are side frequency components alongside the desired (fundamental) having frequency in multiples of that of fundamental wave, and so the term harmonic is used for them as their frequencies are in harmonism with fundamental frequency ,

The harmonic frequencies are equally spaced by the width of the fundamental frequency and can be found by repeatedly adding that frequency.

Harmonics....You want to clear in electrical field!!!!...depends on the load , you can apply filters, 12 pulse,6 pulse rectifiers , capacitors etc to clear the harmonics at certain level. ( You got a computer and internet connection. that does not mean to post whatever you feel. computer and net are cheap in India!!!!...but you don't have time to spend for study. If you are a student, don't waste money. If you are an employee, you need to improve. If you didn't fall in both category , please don't waste our time.)...

You must know how harmonic is generated and about harmonic filters

For long time this was a confusing question to me..

But I got the answer recently..

Harmonics are a ideal consept. Practically there is no separate fundamental freaquency and harmonics.

See kvsreedhar posted a picture, there is 3 waves.

1) Distorted wave

2) fundamental wave

3) Harmonic wave

Because of core magnetic saturation of transformer that type distortion will happen to the AC voltage. So our output is distorted wave...

For analysis distorted wave is resolved into fundamental and harmonic. If we are adding the fundamental wave (the output that we are expecting) and 3rd harmonics. We will get the exact or approximate shape of distoreted wave. Then we are telling that 3rd harmonics present there. In this way we can resolve any distorted AC wave (OR AC wave with any shape) into a fundamental wave and some other waves of different magnitude and frequency & all the other waves exept the fundamental wave, are called harmonics.

Try to add fundamental waves and odd harmonics infinitely you can see that the wave shape is getting close to a square wave.