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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
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
Harmonic resonance calculation in power-factor correction Eaton's Power factor correction: a guide for the plant engineer states, Capacitors and transformers can create dangerous resonance conditions when capacitor banks are installed at the service
EMC emission harmonics - Electrical Engineering Stack Exchange I have a crystal associated with an Ethernet-to-PCIe bridge operating at 25 MHz I observe spikes at 62 5 MHz and 312 5 MHz Those harmonics are 2 5 times and 12 5 times the crystal fundamental fre