|
IEC 63182-1
Edition 1.0 2020-05
INTERNATIONAL
STANDARD
Magnetic powder cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 1: General specification
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de
CH-1211 Geneva 20
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 Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
.
IEC 63182-1
Edition 1.0 2020-05
INTERNATIONAL
STANDARD
Magnetic powder cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 1: General specification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.100.10 ISBN 978-2-8322-8379-0
– 2 – IEC 63182-1:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Locations and functions of core parts and surfaces. 7
4.1 Mating surface . 7
4.2 Centre leg or centre pole . 7
4.3 Outer walls or legs . 7
4.4 Back wall, bottom and back surfaces . 7
5 Dimensions descriptions . 8
6 Limits of surface irregularities . 10
6.1 Surface irregularities of uncoated cores . 10
6.1.1 Chips and ragged edges . 10
6.1.2 Cracks . 10
6.1.3 Flash . 10
6.1.4 Scratch . 10
6.1.5 Rust. 10
6.1.6 Discoloration . 10
6.2 Surface irregularities of coated cores . 10
6.2.1 Peeling . 10
6.2.2 Pinholes . 10
6.2.3 Bubble . 10
6.2.4 Coating tip . 10
6.2.5 Unevenness. 10
Annex A (informative) Area and length reference for visual inspection . 11
Annex B (informative) Anticipated sectional specifications . 13
Figure 1 – Location of main core parts and surfaces – Example of E-core type . 8
Figure 2 – Block-core and ellipse-core dimensions designations . 8
Figure 3 – Cylinder-core dimensions designations . 9
Figure 4 – EQ-core dimensions designations . 9
Table 1 – Block-core and ellipse-core dimensions designations . 8
Table 2 – Cylinder-core dimensions designations . 9
Table 3 – EQ-core dimensions designations . 9
Table A.1 – Area and length reference for visual inspection . 12
Table B.1 – Anticipated sectional specifications in the IEC 63182 series . 13
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MAGNETIC POWDER CORES – GUIDELINES ON
DIMENSIONS AND THE LIMITS OF SURFACE IRREGULARITIES –
Part 1: General specification
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 the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 63182-1 has been prepared by IEC technical committee 51:
Magnetic components, ferrite and magnetic powder materials.
The text of this International Standard is based on the following documents:
CDV Report on voting
51/1324/CDV 51/1340/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 63182 series, published under the general title Magnetic powder
cores – Guidelines on dimensions and the limits of surface irregularities, can be found on the
IEC website.
– 4 – IEC 63182-1:2020 © IEC 2020
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.
INTRODUCTION
Magnetic powder core materials are distinct from ferrite materials. Whereas ferrites are
homogeneous ceramic oxides, powder cores are heterogeneous magnetic alloys. Alloys which
can include iron, nickel and other additives are prepared in fine powder form. The powder
particles are insulated with non-conductive materials, and the resulting heterogeneous structure
is formed by compaction into a core shape, such as a ring.
Magnetic powder cores are suitable for use in inductors. They are characterized by low
permeability, resistance to saturation under the influence of high currents, high flux densities,
high Curie temperatures, as well as soft saturation, which is controlled, and gradual reduction
in inductance with increasing DC bias field, even to very high levels of bias.
The commonly used magnetic powder core materials are pure iron (Fe), iron-silicon-aluminium
(FeSiAl), iron-silicon (FeSi), iron-nickel (FeNi), iron-nickel-molybdenum (FeNiMo), iron-silicon-
chromium (FeSiCr), iron-based amorphous powder (FeSiB) and iron-based nanocrystalline
(FeCuNbSiB) powder.
Compliance with the requirements in the sectional specifications ensures basic mechanical
interchangeability of complete assemblies and wound coils. The differences in loss, DC bias,
and frequency response performance among materials, and among manufacturers, are
significant, even though size and permeability can be identical for parts under comparison.
Due to the method of manufacture and the physical nature of the products, magnetic powder
cores can be expected to exhibit some degree of physical irregularities such as chips and
ragged edges, cracks, flash, scratch, rust and discoloration. For coated cores some coating
layer defects such as peeling, pinholes, bubbles, coating tips and unevenness can occur.
The permissible extent of these surface irregularities will depend on the type, position and size
of the irregularity and on the function of the core. Thus, in order to establish limits of surface
irregularities for a given series of magnetic powder cores, for example ring-cores, block-cores,
cylinder-cores, ellipse-cores, E-cores, EQ-cores, EER-cores, U-cores and pot-cores, a
particular specification for each should be prepared, setting out in detail the permissible extent
of the various types of irregularities. The irregularities are considered as being detectable
wi
...