Harmonic spectrum: Difference between revisions

Revision as of 16:09, 18 October 2013

The harmonic spectrum is the representation of the amplitude of each harmonic order with respect to its frequency.

Figure M9 shows an example of harmonic spectrum for a rectangular signal.

Each type of device causing harmonics draws a particular form of current, with a particular harmonic content. This characteristic can be displayed by using the harmonic spectrum.

Fig. M9 : Harmonic spectrum for a rectangular signal U(t)

ru:Основные показатели гармонических искажений и принципы их измерения zh:谐波畸变的基本指标和测量原理

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 {{Menu_Harmonic_management}}
-__TOC__
-== Principle  ==
-Each type of device causing harmonics draws a particular form of harmonic current (amplitude and phase displacement).<br>These values, notably the amplitude for each harmonic order, are essential for analysis.
+The harmonic spectrum is the representation of the amplitude of each harmonic order with respect to its frequency.
-== Individual harmonic distortion (or harmonic distortion of order&nbsp;h)  ==
+'''Figure M9''' shows an example of harmonic spectrum for a rectangular signal.
-The individual harmonic distortion is defined as the percentage of harmonics for order h with respect to the fundamental.<br><math>U_h(%)=100 \frac{U_h}{U_1}</math>&nbsp;
+Each type of device causing harmonics draws a particular form of current, with a particular harmonic content. This characteristic can be displayed by using the harmonic spectrum.
-or
+[[Image:Fig_M09.jpg|none]]
+'''''Fig. M9 :''''' ''Harmonic spectrum for a rectangular signal U(t)''
-<math>i_h(%)=100 \frac {I_h}{I_1}</math>&nbsp;
-== Harmonic spectrum  ==
+[[ru:Основные показатели гармонических искажений и принципы их измерения]]
+[[zh:谐波畸变的基本指标和测量原理]]
-By representing the amplitude of each harmonic order with respect to its frequency, it is possible to obtain a graph called the harmonic spectrum.'''Figure M12 '''shows an example of the harmonic spectrum for a rectangular signal.
-== Rms value  ==
-The rms value of the voltage and current can be calculated as a function of the rms value of the various harmonic orders.<br><math>Irms=\sqrt {\sum_{h=1}^\infty I_h^2}</math>
-and
-<math>Urms=\sqrt {\sum_{h=1}^\infty U_h^2}</math>&nbsp;
-----
-<br>[[Image:FigM12a.jpg|left]] <br><br><br><br><br><br><br><br><br><br><br><br><br>[[Image:FigM12b.jpg|left]] <br><br><br><br><br><br><br><br><br><br><br><br><br>
-'''''Fig. M12:'''''<i>&nbsp;Harmonic spectrum of a rectangular signal, for a voltage U (t)</i>
-----
-[[ru:Гармонический спектр и гармоническое искажение]]
-[[zh:谐波频谱和谐波畸变]]

Harmonic spectrum: Difference between revisions

Revision as of 16:09, 18 October 2013

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