What exactly are harmonics and how do they appear? The blue sine which shows 1 period is the fundamental Then there's the third harmonic (square waves don't have even harmonics), the purple one Its amplitude is 1 3 of the fundamental, and you can see it's three times the fundamental's frequency, because it shows 3 periods Same for the fifth harmonic (brown)
How do I calculate THD? - Electrical Engineering Stack Exchange Of course, after a certain index of harmonic the THD measurement will not change much, but that depends on the frequency content or the original signal itself, and also your accuracy requirement So it's up to you i e you can start with up to 10th harmonic and calculate the THD, then up to 11th to see if it changes much, etc Instead,
filter - What is the harmonic content of a PWM signal? - Electrical . . . Suppose I'm using a 3 6 kHz carrier to reproduce a 60 Hz sine wave To properly design a filter for this application to hit a specific harmonic distortion target, I need to know the harmonic content of the PWM signal How can I predict what that harmonic content is? Is it going to vary dramatically with the pulse widths?
Help me understand FFT and harmonic distortions - Electrical . . . I'm new to FFT and harmonic distortions I'm dealing with a power system where the phase currents are distorted Now I don't understand the concept of FFT and why the harmonics seen in FFT relate to the current waveforms FFT shows how the current waveform changes in gain by frequency instead of time
How Exactly Does a Push-pull Pair Cancel Even Harmonics? As far as I can make out, it's favoured because it has low harmonic distortion and this, it seems, is down to it's push-pull configuration It's often said that a push-pull pair cancels even harmonics, but I'm interested to know exactly how this happens
signal - Whats the relationship between harmonic distortion and . . . Harmonic Distortion is not related to intermodulation distortion Here is another point I make, if you remove part of a sine wave, the harmonic spectrum exactly matches the harmonic content of that feature Here is a shot of the peak of a sine wave clipped off, all by itself and its spectrum
How do I simulate an RF mixer in PSS or harmomic balance with an . . . However, I have severe trouble getting a harmonic balance or periodic-steady-state simulation to succeed with sensible results When I use the shooting engine, PSS fails to converge with messages such as the following: Conv norm = 44 7e+03, max dV(I28 net8) = 11 032 V, took 14 92 s
Why harmonic distortion and not at other frequencies? Harmonic distortion is harmonic because it is related to the primary periodic waveform that is the basis for comparison A nonlinear impedance effects every cycle of the waveform in the same way It does not randomly insert something here and there Distortion that is not harmonic is often transient
Why are there no even harmonics in AC machines? Then the voltage swing produces more asymmetrical current and no longer is a symmetrical soft square wave but asymmetrical even harmonic producing fourier components of the distorted waveform Then the apparent inductance drops quickly and is usually rated for -10% at rated DC or ac current