IEC 62044-3:2023
(Main)Cores made of soft magnetic materials - Measuring methods - Part 3: Magnetic properties at high excitation level
Cores made of soft magnetic materials - Measuring methods - Part 3: Magnetic properties at high excitation level
IEC 62044-3:2023 specifies measuring methods for power loss and amplitude permeability of magnetic cores forming the closed magnetic circuits intended for use at high excitation levels in inductors, chokes, transformers and similar devices for power electronics applications. This second edition cancels and replaces the first edition published in 2000. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: addition of Annex F and Annex G.
Noyaux en matériaux magnétiques doux - Méthodes de mesure - Partie 3: Propriétés magnétiques à niveau élevé d'excitation
L'IEC 62044-3:2023 spécifie les méthodes de mesure de la perte de puissance et de la perméabilité d'amplitude des noyaux magnétiques qui forment les circuits magnétiques fermés destinés à être utilisés à des niveaux élevés d'excitation dans les bobines d'inductance, les bobines d'arrêt, les transformateurs et les dispositifs similaires pour les applications d'électronique de puissance. Cette deuxième édition annule et remplace la première édition parue en 2000. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: ajout de l'Annexe F et de l'Annexe G.
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IEC 62044-3 ®
Edition 2.0 2023-07
REDLINE VERSION
INTERNATIONAL
STANDARD
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inside
Cores made of soft magnetic materials – Measuring methods –
Part 3: Magnetic properties at high excitation level
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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International Standards for all electrical, electronic and related technologies.
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IEC 62044-3 ®
Edition 2.0 2023-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Cores made of soft magnetic materials – Measuring methods –
Part 3: Magnetic properties at high excitation level
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.030, 29.100.10 ISBN 978-2-8322-7224-4
– 2 – IEC 62044-3:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 2
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and symbols. 8
3.1 Terms and definitions . 9
3.2 Symbols . 9
4 General precautions requirements for measurements at high excitation level . 13
4.1 General statements . 13
4.1.1 Relation to practice . 13
4.1.2 Core effective parameters and material properties . 13
4.1.3 Reproducibility of the magnetic state . 14
4.2 Measuring coil . 14
4.2.1 General . 14
4.2.2 Number of turns . 14
4.2.3 Single winding and double winding . 15
4.3 Mounting of cores consisting of more than one part . 15
4.4 Measuring equipment . 16
5 Specimens . 18
6 Measuring procedures . 18
6.1 General procedure . 18
6.2 Measuring method for the (effective) amplitude permeability . 20
6.2.1 Purpose . 20
6.2.2 Principle of the measurement . 20
6.2.3 Circuit and equipment . 20
6.2.4 Measuring procedure . 20
6.2.5 Calculation . 20
6.3 Measuring methods for the power loss . 21
6.3.1 Purpose . 21
6.3.2 Methods and principles of the measurements . 21
7 Information to be stated . 24
8 Test report . 25
Annex A (informative) Basic circuits and related equipment for the measurement of
amplitude permeability . 26
Annex B (informative) Root-mean-square method for the measurement of power loss –
Example of a circuit and related procedure . 29
B.1 Method of measurement . 29
B.2 Measuring coil . 29
B.3 Measuring equipment . 30
B.4 Measuring procedure . 30
B.5 Pulse measurement and accuracy . 31
Annex C (informative) Multiplying methods for the measurement of power loss – Basic
circuits and related measurement procedures . 32
C.1 Basic circuits . 32
C.2 Requirements . 34
C.3 Measuring coil . 34
C.4 Accuracy . 34
C.5 V-A-W (volt-ampere-watt) meter method . 34
C.6 Impedance analyzer method . 35
C.7 Digitizing method . 35
C.8 Vector spectrum method . 35
C.9 Cross-power method . 36
Annex D (informative) Reflection method for the measurement of power loss – Basic
circuit and related measurement procedures . 37
D.1 Basic circuit . 37
D.2 Requirements . 37
D.3 Measuring coil . 37
D.4 Measuring procedure and accuracy . 38
Annex E (informative) Calorimetric measurement methods for the measurement of
power loss . 39
E.1 Basic circuit . 39
E.2 Requirements . 40
E.3 Measuring coil . 40
E.4 Accuracy . 40
E.5 Measurements at thermal equilibrium . 40
E.5.1 General . 40
E.5.2 Measurement across calibrated thermal resistance . 40
E.5.3 Measurement by matching the temperature rise in the core and resistor . 41
E.6 Measurements at non-thermal equilibrium . 41
Annex F (normative) Magnetic properties under pulse condition . 42
F.1 Object . 42
F.2 Measurement methods . 42
F.3 Principle of the methods . 42
F.4 Specimens . 42
F.5 Measuring coil . 42
F.6 Measuring equipment . 43
F.7 Measuring procedure . 44
F.7.1 General . 44
F.7.2 Measurement of pulse inductance factor and magnetizing current . 45
F.7.3 Measurement of the non-linearity of the magnetizing current . 46
F.8 Calculation . 47
Annex G (informative) Examples of circuits for pulse measurements . 49
Bibliography . 50
Figure 1 – Pulse excitation without biasing field . 10
Figure 2 – Pulse excitation with biasing field . 11
Figure A.1 – Basic circuits for the measurement of amplitude permeability . 28
Figure B.1 – Example of a measuring circuit for the RMS method . 29
Figure C.1 – Basic circuits for multiplying methods . 33
Figure D.1 – Basic circuit . 37
Figure E.1 – Basic circuit and related measurement procedures – Measurement set-up . 39
Figure F.1 – Voltage pulse parameters . 45
Figure F.2 – Typical measuring waveforms . 46
– 4 – IEC 62044-3:2023 RLV © IEC 2023
Figure F.3 – Non-linearity of magnetizing current . 47
Figure G.1 – Measurement without bias and with single pulses . 49
Figure G.2 – Measurement with bias and with repeated pulses . 49
Table 1 – Some multiplying methods and related domains of excitation waveforms,
acquisition, processing . 22
IEC 62044
...
IEC 62044-3 ®
Edition 2.0 2023-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Cores made of soft magnetic materials – Measuring methods –
Part 3: Magnetic properties at high excitation level
Noyaux en matériaux magnétiques doux – Méthodes de mesure –
Partie 3: Propriétés magnétiques à niveau élevé d'excitation
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
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3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
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committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
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Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC 62044-3 ®
Edition 2.0 2023-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Cores made of soft magnetic materials – Measuring methods –
Part 3: Magnetic properties at high excitation level
Noyaux en matériaux magnétiques doux – Méthodes de mesure –
Partie 3: Propriétés magnétiques à niveau élevé d'excitation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.030, 29.100.10 ISBN 978-2-8322-7172-8
– 2 – IEC 62044-3:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and symbols. 8
3.1 Terms and definitions . 8
3.2 Symbols . 12
4 General requirements for measurements at high excitation level . 13
4.1 General statements . 13
4.1.1 Relation to practice . 13
4.1.2 Core effective parameters and material properties . 13
4.1.3 Reproducibility of the magnetic state . 13
4.2 Measuring coil . 13
4.2.1 General . 13
4.2.2 Number of turns . 14
4.2.3 Single winding and double winding . 14
4.3 Mounting of cores consisting of more than one part . 15
4.4 Measuring equipment . 15
5 Specimens . 18
6 Measuring procedures . 18
6.1 General procedure . 18
6.2 Measuring method for the effective amplitude permeability . 19
6.2.1 Purpose . 19
6.2.2 Principle of the measurement . 19
6.2.3 Circuit and equipment . 19
6.2.4 Measuring procedure . 19
6.2.5 Calculation . 20
6.3 Measuring methods for the power loss . 20
6.3.1 Purpose . 20
6.3.2 Methods and principles of the measurements . 20
7 Information to be stated . 23
8 Test report . 24
Annex A (informative) Basic circuits and related equipment for the measurement of
amplitude permeability . 25
Annex B (informative) Root-mean-square method for the measurement of power loss –
Example of a circuit and related procedure . 27
B.1 Method of measurement . 27
B.2 Measuring coil . 27
B.3 Measuring equipment . 28
B.4 Measuring procedure . 28
B.5 Pulse measurement and accuracy . 29
Annex C (informative) Multiplying methods for the measurement of power loss – Basic
circuits and related measurement procedures . 30
C.1 Basic circuits . 30
C.2 Requirements . 31
C.3 Measuring coil . 31
C.4 Accuracy . 31
C.5 V-A-W (volt-ampere-watt) meter method . 32
C.6 Impedance analyzer method . 32
C.7 Digitizing method . 32
C.8 Vector spectrum method . 33
C.9 Cross-power method . 33
Annex D (informative) Reflection method for the measurement of power loss – Basic
circuit and related measurement procedures . 34
D.1 Basic circuit . 34
D.2 Requirements . 34
D.3 Measuring coil . 34
D.4 Measuring procedure and accuracy . 35
Annex E (informative) Calorimetric measurement methods for the measurement of
power loss . 36
E.1 Basic circuit . 36
E.2 Requirements . 37
E.3 Measuring coil . 37
E.4 Accuracy . 37
E.5 Measurements at thermal equilibrium . 37
E.5.1 General . 37
E.5.2 Measurement across calibrated thermal resistance . 37
E.5.3 Measurement by matching the temperature rise in the core and resistor . 38
E.6 Measurements at non-thermal equilibrium . 38
Annex F (normative) Magnetic properties under pulse condition . 39
F.1 Object . 39
F.2 Measurement methods . 39
F.3 Principle of the methods . 39
F.4 Specimens .
...
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