EN 62044-2:2005

SLOVENSKI SIST EN 62044-2:2005

STANDARD
december 2005
Jedra iz mehkomagnetnih materialov – Merilne metode – 2. del: Magnetne
lastnosti pri šibkem vzbujanju (IEC 62044-2:2005)
Cores made of soft magnetic materials – Measuring methods – Part 2: Magnetic
properties at low excitation level (IEC 62044-2:2005)
ICS 29.100.10 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 62044-2
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2005
ICS 29.100.10
English version
Cores made of soft magnetic materials –
Measuring methods
Part 2: Magnetic properties at low excitation level
(IEC 62044-2:2005)
Noyaux en matériaux magnétiques doux - Kerne aus weichmagnetischen Materialien -
Méthodes de mesure Messverfahren
Partie 2: Propriétés magnétiques à niveau Teil 2: Messungen der magnetischen
d'excitation faible Eigenschaften im Signalapplikationsbereich
(CEI 62044-2:2005) (IEC 62044-2:2005)

This European Standard was approved by CENELEC on 2005-04-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62044-2:2005 E
Foreword
The text of document 51/804/FDIS, future edition 1 of IEC 62044-2, prepared by IEC TC 51, Magnetic
components and ferrite materials, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 62044-2 on 2005-04-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-01-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-04-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62044-2:2005 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 62044-2:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60205 - Calculation of the effective parameters of EN 60205 2001
magnetic piece parts
IEC 60401-3 2003 Terms and nomenclature for cores made EN 60401-3 2003
of magnetically soft ferrites
Part 3: Guidelines on the format of data
appearing in manufacturers' catalogues of
transformer and inductor cores

IEC 62044-1 2002 Cores made of soft magnetic materials - EN 62044-1 2002
Measuring methods
Part 1: Generic specification
1)
Undated reference.
2)
Valid edition at date of issue.

NORME CEI
INTERNATIONALE IEC
62044-2
INTERNATIONAL
Première édition
STANDARD
First edition
2005-03
Noyaux en matériaux magnétiques doux –
Méthodes de mesure –
Partie 2:
Propriétés magnétiques à niveau
d'excitation faible
Cores made of soft magnetic materials –
Measuring methods –
Part 2:
Magnetic properties at low excitation level
 IEC 2005 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale PRICE CODE V
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

62044-2  IEC:2005 – 3 –
CONTENTS
FOREWORD.7

1 Scope and object.11
2 Normative references .11
3 Definitions .11
4 Symbols .13
5 Environmental conditions.17
6 General precautions for methods involving permeability measurements .17
6.1 Parameters involved .17
6.2 Mounting of cores consisting of more than one part .17
7 General precautions for loss measurement at low flux density .17
7.1 Contributory losses.17
7.2 Mounting .19
8 Magnetic conditioning .19
9 Inductance measurement.21
9.1 General .21
9.2 Determination of the test signal.21
9.3 Determination of the test coil .23
9.4 Considerations for core alignment during test.27
9.5 Measurement of inductance under the influence of d.c. magnetic field .29
9.6 Parameters related to core geometry .31
9.7 Magnetic material parameters .33
10 Disaccommodation .37
11 Temperature coefficient of permeability.37
11.1 Specimens .37
11.2 Measuring procedure .39
12 Losses at low flux density .41
12.1 Object .41
12.2 Measuring coil .41
12.3 Measurement of residual and eddy current loss.41
12.4 Measurement of the hysteresis loss .43
13 Total harmonic distortion .45
13.1 Specimen .45
13.2 Measuring instrument and circuit.45
13.3 Measuring procedure .45
13.4 A value and winding conditions for THD measurement.47
L F
13.5 Material characteristics – THD .47
F
14 Curie temperature.49
15 Normalized impedance, parallel conductivity, and insertion loss.49
15.1 General .49
15.2 Measuring procedure .49
15.3 Normalized impedance .51
15.4 Parallel conductivity.51

62044-2  IEC:2005 – 5 –
Annex A (informative) Disaccommodation.53
Annex B (informative) Measurement conditions for THD testing .57

Figure 1 – Pictorial representation of the effect of self-resonant frequency on the
value of measured inductance.23
Figure 2 – THD measuring circuit .45
F
Figure 3 – Curie temperature .49
Figure B.1 – Flux density as a function of number of turns .57
Figure B.2 – Circuit correction factor (CCF) as a function of number of turns.61

Table 1 – Relationship of test turns to magnetic structure, test frequency and
inductance factor A .25
L
Table 2 – Specimen of A value and winding conditions for THD measurement .47
L F
62044-2  IEC:2005 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CORES MADE OF SOFT MAGNETIC MATERIALS –
MEASURING METHODS –
Part 2: Magnetic properties at low excitation level

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