2012年5月21日 · 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).

2024年4月24日 · 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,

On the other hand, if you take two sinewaves with one at an exact multiple of the other (a harmonic) and combine them, you'll get a waveform at the frequency of the first, but not a sinewave. Add enough of these harmonics at the right amplitudes (and phases) and you can convert a sinewave into a triangle wave, a sawtooth, or a square wave or ...

\$\begingroup\$ First, thank you for answer, sec : can you re-answer the second question What are the frequencies of those power [harmonics]?! i was actually asking about the frequency of the ripples! i know that the frequency of the harmonic is n*f (where n is the rank and the f is the fund freq 50/60Hz), but what about the Ripples ? \$\endgroup\$

2020年5月18日 · Total Harmonic Distortion fundamental frequency clarification. 1. Efficient method of measuring total ...

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.

2022年1月10日 · Here is a practical situation: We are measuring harmonics with a Class-A PQ device. At certain times we have the fundamental values of current higher than the true RMS values.

2018年4月20日 · Basically, a PWM signal is created using the fundamental harmonic and it's odd order harmonics. F_fundamental = 100kHz. F_3= 3*100kHz. F_5= 5*100kHz... This happens because cosine is an even function. The sine function is odd and goes to zero for odd harmonics. This is why you don't see any amplitude at the odd numbers after the fundamental.

2014年10月22日 · 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.

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) = …