THD
Measurement of the total coefficient of harmonic components.
blockType: SubSystem
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Path in the library: |
Description
Block THD calculates the Total Harmonic Distortion (THD) as a percentage using the equations:
where
-
- is the RMS value of the harmonic amplitude corresponding to -mu harmonic order;
-
— This is or ;
-
— the sum of all harmonic components.
Ports
Input
#
IN_1
—
harmonic amplitude
scalar | vector
Details
Harmonic amplitude.
| Data types |
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| Complex numbers support |
No |
Output
#
OUT_1
—
the total coefficient of harmonic components, %
scalar | vector
Details
The total coefficient of harmonic components in percent.
| Data types |
|
| Complex numbers support |
No |
Parameters
Main group
# Fundamental frequency of input signal, Hz: — the main frequency of the signal
Details
The main frequency of the input signal is in Hz.
| Default value |
|
| Program usage name |
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| Evaluatable |
Yes |
# Sample time: — sampling period
Details
The interval between the block calculation steps. During execution, the block receives output data and, if necessary, updates its internal state.
To inherit the calculation step, set this parameter to −1. To work in discrete mode, specify a positive integer. For continuous operation, specify 0.
| If this block is located in a subsystem with a mask or in another subsystem that allows either continuous or discrete operation, increase the value of the sampling period to ensure proper switching between continuous and discrete block implementations. |
| Default value |
|
| Program usage name |
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| Evaluatable |
Yes |