Jun25
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How do variable frequency drives and other power electronics introduce odd-numbered harmonics in supply power?
I understand that suddenly opening a "switch" (embodied in a BJT or IGBT) connected to mains will cause a disturbance in the supply "signal", but why and how at an odd harmonic frequency?
I remember reading a very good technical article on this a while back, but for the life of me I can't find it on the net again.
Anyway, the power electronics devices draw a non-linear load that has harmonics based off a fundamental frequency. I have heard of not only odd harmonics but also even harmonics. It just depends on the device's waveform and how the Fourier components come about.
Sorry I can't find that article, but maybe try searching the net for "power factor correction" or just "power factor" since these types of devices cause headaches due to their poor power factor.
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Lecture - 1 Power Electronics
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