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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
- 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
- inverter - Why the triangle reference wave is used in PWM for sine . . .
Your question is answered by analyzing the intrinsic benefits of the triangle sine wave PWM from a harmonic point of view Normally PWM sine modulation in three-phase inverters is implemented in digital form using a microprocessor
- Vector control method - Electrical Engineering Stack Exchange
The particularity is that it results in a voltage waveform that optimizes the use of the DC bus for the same reason as a third harmonic injection (the peak voltage is lower for the same fundamental amplitude and the third harmonics are cancelled in the current for a three-phase system)
- Frequency of square wave - Electrical Engineering Stack Exchange
Any periodic wave can be expressed as a combination of sine waves of the basic frequency plus harmonic frequencies of sine wave shape A square wave can be expressed as a combination of a basic sine wave of same frequency plus other sine waves of higher frequencies of odd number
- Can slower switching edges worsen the EMI behavior?
This basically helps in reducing high frequency harmonic components in the switching signal My simplified understanding is: Higher frequency components -> shorter wavelengths -> even shorter traces can already act as unintended radiators (antennas ) Is it also possible that slower edges could make the situation worse from an EMI point of view?
- What is the relation between FFT length and frequency resolution?
The next harmonic will have two peaks and two troughs, the next harmonic three of each etc The harmonics will be multitudes of 5, 10, 15 etc Hz If though we had selected 500 bins, then the fundamental cosine would be more expanded: it would have a temporal length of 500 x 0 001 = 0 5 s => f_min = 2 Hz
- Interpreting an EMC radiated emission test result
I am new to EMC Our team performed an EMC radiated emission test below is the image of the test result I am struggling to understand the result My collegue told me that the 16 MHz clock frequenc
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