It seems as though when an alternator is wired in a delta config with 3 phase power, the third harmonic of the sine waves can combine to create a current that flows throughout the alternator???
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"Perplexity is the beginning of dementia" - Professor Coriolus
Who said that only third harmonics is considered for further studies? It is not so!
However, one can say that fundamental is first order harmonics.
The second order harmonics will not have any effect as is the case with any even harmonics due to half wave symmetry.
So, the first dominant harmonics is the third harmonics. As the magnitude of a particular order harmonics is: magnitude of the fundamental / the order of the harmonics - it is easy to measure this and study further
I have a doubt here........3rd harmonics are zero sequence currents,so can be added arithmetically & at any instance in any phase they cancel out each other as pointed out by you in one other .2nd arder harmonics are has also no effect due to their half wave symmetry property. So both can be considered as NIL!!! then next higher order is 5th harmonics whuch has its effects on the system.(4th harmonic is again has no effects on the system)
Please note that third or any triplen harmonics are added "ARITHMATICALLY" and hence would not cancel out ecah other. The resultant current of a three-phase third harmonics would be IR at an angle zero degrees PLUS IY at an angle zero degrees PLUS IB at an angle zero degrees and so they would add arithmatically (i.e.) if you have Third Harmonic IR 3A and so also IY & IB, the resultant Thgird Harmonic Currremt would be 9A and it would accumulate in the neutral. Only vector sum of balanced currents would be zero and not the arithmatical sum.
third Harmonic
Re: third Harmonic
