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IEVref: | 221-03-42 | ID: | |

Language: | en | Status: Standard | |

Term: | (magnetic) total harmonic distortion | ||

Synonym1: | |||

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Synonym3: | |||

Symbol: | THD
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Definition: | distortion of voltage waveform caused by a non-linear relation between the magnetic flux density and the magnetic field strength in the magnetic core and expressed in decibels by:
where $V}_{\text{m}}=\sqrt{{\displaystyle \sum _{n=1}^{\infty}{V}_{n}^{2}}$
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Publication date: | 2007-04 | ||

Source: | |||

Replaces: | |||

Internal notes: | 2016-01-05: <i>V</i><sub>t</sub> corrected to <i>V</i><sub>f</sub> in conformity with the standard. JGO 2012-01-15: German term corrected in accordance with mail received from Anne Seeger DKE 2015-01-14. JGO 2017-02-27: <i>V</i><sub>n</sub> corrected to <i>V</i><sub><i>n</i></sub>. See mail exchange with RS and JS 2016-01. JGO 2017-06-02: Cleanup - Remove Attached Image 221-03-41.gif | ||

CO remarks: | |||

TC/SC remarks: | |||

VT remarks: | |||

Domain1: | |||

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Domain5: |

*THD* = 20 lg(*V*_{m}/*V*_{f}) dB

where

$V}_{\text{m}}=\sqrt{{\displaystyle \sum _{n=1}^{\infty}{V}_{n}^{2}}$

*V*_{n} is the amplitude of the *n*-th harmonic component of the waveform and *V*_{f} is the amplitude of its fundamental component