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Area Magnetic materials and components / Permeability and losses

IEV ref221-03-43

Symbol
THDF

en
(magnetic) total harmonic distortion factor
mathematical expression used for the evaluation of characteristics of magnetic materials and expressed in decibels by:

TH D F =20lg( V m / V f μ ea /CCF ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmGadiWaaiWabaabaiaafaaake aacaWGubGaamisaiaadseadaWgaaWcbaacbaGaa8NraaqabaGccqGH 9aqpcaaIYaGaaGimaiaaysW7caaMc8UaciiBaiaacEgadaqadaqaam aalaaabaGaamOvamaaBaaaleaacaWFTbaabeaakiaac+cacaWGwbWa aSbaaSqaaiaa=zgaaeqaaaGcbaGaeqiVd02aaSbaaSqaaiaa=vgaca WFHbaabeaakiaac+cacaWGdbGaam4qaiaadAeaaaaacaGLOaGaayzk aaGaaGPaVlaaysW7caqGKbGaaeOqaaaa@563B@

where

V m = n=1 V n 2 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaerbbjxAHXgarmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdh9arVeeu0dXdh9vqqj=hEeeu0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaiaabiWacmaadaqabeaaeaqaauaaaOqaai aadAfadaWgaaWcbaGaaiyBaaqabaGccqGH9aqpdaGcaaqaamaaqaha baGaamOvamaaDaaaleaacaWGUbaabaGaaGOmaaaaaeaacaWGUbGaey ypa0JaaGymaaqaaiabg6HiLcqdcqGHris5aaWcbeaaaaa@4393@ , where Vn is the amplitude of the n-th harmonic component of the waveform,
Vf is the amplitude of its fundamental component,
μea is the amplitude permeability,
CCF is the Circuit Correction Factor

Note 1 – In practice, CCF=1/ 1+ ( 3ω L 1 / R s ) 2 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmGadiWaaiWabaabaiaafaaake aacaWGdbGaam4qaiaadAeacqGH9aqpcaaIXaGaai4lamaakaaabaGa aGymaiabgUcaRmaabmaabaGaaG4maiabeM8a3jaadYeadaWgaaWcba GaaGymaaqabaGccaGGVaGaamOuamaaBaaaleaaieaacaWFZbaabeaa aOGaayjkaiaawMcaamaaCaaaleqabaGaaGOmaaaaaeqaaaaa@4983@ stands for the Circuit Correction Factor and is given in the approximation for the third harmonic, which is valid for measurements without applied DC bias. L1 is the primary inductance. Rs is the total source resistance (50 Ω).

Note 2 – THDF is sometimes expressed in decibels.


fr
facteur de distorsion harmonique totale (magnétique), m
expression mathématique utilisée pour l’évaluation des caractéristiques de matériaux magnétiques et exprimée en décibels par:

TH D F =20lg( V m / V f μ ea /CCF ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmGadiWaaiWabaabaiaafaaake aacaWGubGaamisaiaadseadaWgaaWcbaacbaGaa8NraaqabaGccqGH 9aqpcaaIYaGaaGimaiaaysW7caaMc8UaciiBaiaacEgadaqadaqaam aalaaabaGaamOvamaaBaaaleaacaWFTbaabeaakiaac+cacaWGwbWa aSbaaSqaaiaa=zgaaeqaaaGcbaGaeqiVd02aaSbaaSqaaiaa=vgaca WFHbaabeaakiaac+cacaWGdbGaam4qaiaadAeaaaaacaGLOaGaayzk aaGaaGPaVlaaysW7caqGKbGaaeOqaaaa@563B@

V m = n=1 V n 2 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaerbbjxAHXgarmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdh9arVeeu0dXdh9vqqj=hEeeu0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaiaabiWacmaadaqabeaaeaqaauaaaOqaai aadAfadaWgaaWcbaGaaiyBaaqabaGccqGH9aqpdaGcaaqaamaaqaha baGaamOvamaaDaaaleaacaWGUbaabaGaaGOmaaaaaeaacaWGUbGaey ypa0JaaGymaaqaaiabg6HiLcqdcqGHris5aaWcbeaaaaa@4393@ , où Vn est l'amplitude du n-ième harmonique de la forme d'onde,
Vf est l'amplitude du fondamental,
μea est la perméabilité d’amplitude,
CCF désigne au facteur de correction du circuit

Note 1 – Dans la pratique, CCF=1/ 1+ ( 3ω L 1 / R s ) 2 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmGadiWaaiWabaabaiaafaaake aacaWGdbGaam4qaiaadAeacqGH9aqpcaaIXaGaai4lamaakaaabaGa aGymaiabgUcaRmaabmaabaGaaG4maiabeM8a3jaadYeadaWgaaWcba GaaGymaaqabaGccaGGVaGaamOuamaaBaaaleaaieaacaWFZbaabeaa aOGaayjkaiaawMcaamaaCaaaleqabaGaaGOmaaaaaeqaaaaa@4983@ correspond au facteur de correction du circuit et est donné dans l’approximation de la troisième harmonique, qui est valable pour les mesures sans courant continu superposé. L1 est l’inductance primaire. Rs est la résistance totale de la source (50 Ω).

Note 2 – THDF est parfois donné en décibels.


ar
عامل التشوه التوافقي الكلى المغناطيسي

de
magnetischer Gesamt-Oberschwingungsverzerrungsgehalt, m

es
factor de distorsión armónica total (magnética)

it
fattore di distorsione armonica totale (magnetica)

ja
磁性総高調波ひずみ係数
磁性総合高調波ひずみ係数

pl
współczynnik zniekształcenia harmonicznego całkowitego (magnetycznego)

pt
factor de distorção (magnética) harmónica total

Publication date: 2007-04
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