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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?
- amplifier - Calculate total harmonic distortion - Electrical . . .
Calculate total harmonic distortion Ask Question Asked 5 years, 6 months ago Modified 2 years ago
- power electronics - Electrical Engineering Stack Exchange
I'm working on a project involving multiple non-linear electrical loads, and I want to estimate the total THDi (Total Harmonic Distortion of Current) and, if possible, THDv (Total Harmonic Distortion of Voltage) for the group of loads
- 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)
- SMPS: What is current mode instability (aka “sub-harmonic oscillation”)?
Sub-harmonic oscillations in current-mode-controlled converters are easily revealed through simple drawings as shown in akellyirl answer However, it is less known that these oscillations find their origin in the inner current-loop instability affected by the presence of a right-half-plane zeros (RHPZ) pair
- Why harmonic distortion and not at other frequencies?
In understanding harmonic distortion, one piece of the puzzle that is missing for me is: - why does the distortion manifest at harmonic frequencies and not other frequencies Feel free to simply point me at a textbook reading that explains it, if that's easier! I understand that non-linear loads can create distortion
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