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- What exactly are harmonics and how do they appear?
"how are harmonics generated? The signal is just "on" or "off", how are there first, third, and fifth harmonics and why do they get weaker?" Although not a satisfactory answer, you could accept the fact that any physically realizable continuous-time signal can be represented as an infinite sum of sinusoids (that's a Fourier series) Thus, any sinusoidal signal doesn't have harmonics, or it
- How do I calculate THD? - Electrical Engineering Stack Exchange
I want to calculate the total harmonic distortion of the signal using this graph and formula The formula is taken from this page: Calculating harmonic distortion First Question: So my problem is to
- filter - What is the harmonic content of a PWM signal? - Electrical . . .
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? Or will there be certain simplifying assumptions I can make?
- failure - Harmonics are bad. . . But how bad? - Electrical Engineering . . .
In power systems, there are rules and regulations stating what levels of harmonic distortion is acceptable One example I've seen for voltage distortion is: THD lt; 8%, single component harmonic
- Why dont we use the third harmonic in power transmission?
And the whole thing is even further complicated by loads that either abuse the harmonic content (nonlinear loads like rectifiers), or literally don't know what to do with it (the harmonic energy just causes useless heating in motors, and maybe torque pulsation as well)
- amplifier - Calculate total harmonic distortion - Electrical . . .
Calculate total harmonic distortion Ask Question Asked 5 years, 2 months ago Modified 1 year, 8 months ago
- 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
- Why are there no even harmonics in AC machines?
As other have said, whenever the waveform is symmetrical about the time axis (or equivalently, when the first half cycle is the negative of the second half cycle), which is known as half-wave symmetry, all even harmonics are zero This answers a "when", and partly the "why" of the question
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