IEC 63093-8:2018
(Main)Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 8: E-cores
Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 8: E-cores
IEC 63093-8:2018 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of E-cores made of ferrite and the essential dimensions of coil formers to be used with them, as well the effective parameter values to be used in calculations involving them. It also gives guidelines on allowable limits of surface irregularities applicable to E-cores.
The specifications contained in this document are useful in negotiations between ferrite core manufacturers and customers about surface irregularities. The use of derived standards, which give more detailed specifications of component parts while still permitting compliance with this standard, is discussed in Annex A.
This edition includes the following significant technical changes with respect to IEC 62317-8:2006 and IEC 60424-3:2015:
a. This document integrates IEC 62317-8:2006 and IEC 60424-3:2015;
b. Table 4 – Allowable areas of chips for E-cores, of IEC 60424-3:2015, has been moved to Annex C (informative) of this document.
Noyaux ferrites – Lignes directrices relatives aux dimensions et aux limites des irrégularités de surface – Partie 8: Noyaux E
L'IEC 63093-8:2018 spécifie les dimensions qui jouent un rôle majeur dans l'interchangeabilité mécanique d'une gamme préférentielle de noyaux E constitués de ferrites et les dimensions essentielles des carcasses à utiliser avec ces noyaux, ainsi que les valeurs des paramètres effectifs à utiliser dans les calculs qui les impliquent. Elle donne également les lignes directrices relatives aux limites admissibles des irrégularités de surface applicables aux noyaux E.
Les spécifications du présent document sont utiles aux négociations entre les fabricants de noyaux en ferrite et leurs clients concernant les irrégularités de surface.
Cette première édition annule et remplace la première édition de l'IEC 62317-8 parue en 2006 et la deuxième édition de l'IEC 60424-3 parue en 2015. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'IEC 623178:2006 et l'IEC 60424-3:2015:
a) le présent document intègre l'IEC 62317-8:2006 et l'IEC 604243:2015;
b) le Tableau 4 – Surfaces admissibles des éclats pour les noyaux E, de l'IEC 60424-3:2015, a été déplacé à l'Annexe C (informative) du présent document.
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IEC 63093-8 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
Ferrite cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 8: E-cores
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 63093-8 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
Ferrite cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 8: E-cores
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.100.10 ISBN 978-2-8322-5835-4
– 2 – IEC 63093-8:2018 © IEC 2018
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Primary dimensions . 6
4.1 General . 6
4.2 Dimensions of E-cores . 7
4.2.1 Main dimensions . 7
4.2.2 Effective parameter and A values . 9
min
4.3 Dimensional limits for coil formers . 11
5 Limits of surface irregularities . 15
5.1 General . 15
5.2 Examples of surface irregularities . 15
5.3 Chips and ragged edges . 15
5.3.1 General . 15
5.3.2 Chips and ragged edges on the mating surfaces . 15
5.3.3 Chips and ragged edges on the other surfaces . 15
5.4 Cracks . 18
5.5 Flash . 18
5.6 Pull-outs . 18
5.7 Crystallites . 19
5.8 Pores . 19
Annex A (normative) Derived standards . 21
Annex B (normative) Example of dimensions for gauges to check the dimensions of
E-cores complying with this document . 22
B.1 General . 22
B.2 Procedure and requirements . 24
Annex C (informative) Reference of allowable areas of chips . 25
Bibliography . 26
Figure 1 – Dimensions of E-cores with rectangular cross-section . 7
Figure 2 – Main dimensions of coil formers . 12
Figure 3 – Examples of surface irregularities . 15
Figure 4 – Chip location for E-cores . 16
Figure 5 – Crack and pull-out locations for E-cores . 18
Figure 6 – Crystallite location for E-cores . 19
Figure 7 – Pore location for E-cores . 20
Figure B.1 – Gauge dimensions . 22
Table 1 – Dimensions of E-cores with rectangular cross-section . 8
Table 2 – Effective parameter and A values . 10
min
Table 3 – Dimensional limits for coil formers . 13
Table 4 – Area and length reference for visual inspection . 17
Table 5 – Limits for cracks . 19
Table B.1 – Gauge dimensions . 23
Table C.1 – Allowable areas of chips for E-cores . 25
– 4 – IEC 63093-8:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –
Part 8: E-cores
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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International Standard IEC 63093-8 has been prepared by IEC technical committee 51:
Magnetic components, ferrite and magnetic powder materials.
This first edition cancels and replaces the first edition of IEC 62317-8 published in 2006 and
the second edition of IEC 60424-3 published in 2015. This edition constitutes a technical
revision.
This edition includes the following significant technical changes with respect to
IEC 62317-8:2006 and IEC 60424-3:2015:
a) This document integrates IEC 62317-8:2006 and IEC 60424-3:2015;
b) Table 4 – Allowable areas of chips for E-cores, of IEC 60424-3:2015, has been moved to
Annex C (informative) of this document.
The text of this International Standard is based on the following documents:
CDV Report on voting
51/1213/CDV 51/1235/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 63093 series, published under the general title Ferrite cores –
Guidelines on dimensions and the limits of surface irregularities, can be found on the IEC
website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
– 6 – IEC 63093-8:2018 © IEC 2018
FERRITE CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –
Part 8: E-cores
1 Scope
This part of IEC 63093 specifies the dimensions that are of importance for mechanical
interchangeability for a preferred range of E-cores made of ferrite and the essential
dimensions of coil formers to be used with them, as well the effective parameter values to be
used in calculations involving them. It also gives guidelines on allowable limits of surface
irregularities applicable to E-cores.
The
...
IEC 63093-8 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 8: E-cores
Noyaux ferrites – Lignes directrices relatives aux dimensions et aux limites
des irrégularités de surface –
Partie 8: Noyaux E
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.
About IEC publications
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IEC 63093-8 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 8: E-cores
Noyaux ferrites – Lignes directrices relatives aux dimensions et aux limites
des irrégularités de surface –
Partie 8: Noyaux E
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-1088-6
– 2 – IEC 63093-8:2018 © IEC 2018
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Primary dimensions . 6
4.1 General . 6
4.2 Dimensions of E-cores . 7
4.2.1 Main dimensions . 7
4.2.2 Effective parameter and A values . 9
min
4.3 Dimensional limits for coil formers . 11
5 Limits of surface irregularities . 15
5.1 General . 15
5.2 Examples of surface irregularities . 15
5.3 Chips and ragged edges . 15
5.3.1 General . 15
5.3.2 Chips and ragged edges on the mating surfaces . 15
5.3.3 Chips and ragged edges on the other surfaces . 15
5.4 Cracks . 18
5.5 Flash . 18
5.6 Pull-outs . 18
5.7 Crystallites . 19
5.8 Pores . 19
Annex A (normative) Derived standards . 21
Annex B (normative) Example of dimensions for gauges to check the dimensions of
E-cores complying with this document . 22
B.1 General . 22
B.2 Procedure and requirements . 24
Annex C (informative) Reference of allowable areas of chips . 25
Bibliography . 26
Figure 1 – Dimensions of E-cores with rectangular cross-section . 7
Figure 2 – Main dimensions of coil formers . 12
Figure 3 – Examples of surface irregularities . 15
Figure 4 – Chip location for E-cores . 16
Figure 5 – Crack and pull-out locations for E-cores . 18
Figure 6 – Crystallite location for E-cores . 19
Figure 7 – Pore location for E-cores . 20
Figure B.1 – Gauge dimensions . 22
Table 1 – Dimensions of E-cores with rectangular cross-section . 8
Table 2 – Effective parameter and A values . 10
min
Table 3 – Dimensional limits for coil formers . 13
Table 4 – Area and length reference for visual inspection . 17
Table 5 – Limits for cracks . 19
Table B.1 – Gauge dimensions . 23
Table C.1 – Allowable areas of chips for E-cores . 25
– 4 – IEC 63093-8:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –
Part 8: E-cores
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of
...
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