Magnetic powder cores - Guidelines on dimensions and the limits of surface irregularities - Part 4: Block-cores

IEC 63182-4:2021 specifies the preferred range of the dimensions that are of importance for mechanical interchangeability and gives guidelines on allowable limits of surface irregularities for block-cores made of metallic magnetic powder.
This document is a specification about surface irregularities which is useful in the negotiations between suppliers and users of magnetic powder-cores.

Noyaux en poudre magnétique – Lignes directrices concernant les dimensions et les limites des irrégularités de surface – Partie 4: Noyaux en blocs

L’IEC 63182-4:2021 spécifie la plage préférentielle des dimensions qui sont importantes pour l’interchangeabilité mécanique, ainsi que les lignes directrices concernant les limites admissibles des irrégularités de surface pour les noyaux en blocs en poudre magnétique métallique.
Le présent document est une spécification portant sur les irrégularités de surface, qui est utile pour les négociations entre les fournisseurs et les utilisateurs de noyaux en poudre magnétique.

General Information

Status
Published
Publication Date
28-Nov-2021
Current Stage
PPUB - Publication issued
Completion Date
29-Nov-2021
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IEC 63182-4
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic powder cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 4: Block-cores
Noyaux en poudre magnétique – Lignes directrices concernant les dimensions
et les limites des irrégularités de surface –
Partie 4: Noyaux en blocs
IEC 63182-4:2021-11(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 63182-4
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic powder cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 4: Block-cores
Noyaux en poudre magnétique – Lignes directrices concernant les dimensions
et les limites des irrégularités de surface –
Partie 4: Noyaux en blocs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-1054-9

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 63182-4:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 Primary dimensions ......................................................................................................... 5

5 Limits of surface irregularities .......................................................................................... 6

5.1 Definition of surface irregularities ............................................................................ 6

5.2 Examples of surface irregularities ........................................................................... 7

5.3 Chips and ragged edges ......................................................................................... 7

5.3.1 General ........................................................................................................... 7

5.3.2 Chips ............................................................................................................... 7

5.3.3 Ragged edges ................................................................................................. 7

5.4 Cracks .................................................................................................................... 7

5.5 Flash ...................................................................................................................... 7

5.6 Rust ........................................................................................................................ 8

5.7 Discoloration ........................................................................................................... 8

Annex A (normative) Derived standards ................................................................................ 9

Figure 1 – Main dimensions of block-cores ............................................................................. 6

Figure 2 – Examples of surface irregularities .......................................................................... 7

Table 1 – Main dimensions of block-cores............................................................................... 6

---------------------- Page: 4 ----------------------
IEC 63182-4:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MAGNETIC POWDER CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –
Part 4: Block-cores
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

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IEC 63182-4 has been prepared by IEC technical committee 51: Magnetic components, ferrite

and magnetic powder materials. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
51/1373/CDV 51/1391/RVC

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

---------------------- Page: 5 ----------------------
– 4 – IEC 63182-4:2021 © IEC 2021

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

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.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under 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.
---------------------- Page: 6 ----------------------
IEC 63182-4:2021 © IEC 2021 – 5 –
MAGNETIC POWDER CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –
Part 4: Block-cores
1 Scope

This part of IEC 63182 specifies the preferred range of the dimensions that are of importance

for mechanical interchangeability and gives guidelines on allowable limits of surface

irregularities for block-cores made of metallic magnetic powder.

This document is a specification about surface irregularities which is useful in the negotiations

between suppliers and users of magnetic powder-cores.

The use of “derived” standards which give more detailed specifications of component parts

while still permitting compliance with this document is discussed in Annex A.
2 Normative references

The following document is referred to in the text in such a way that some or all of their content

constitutes requirements 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.

IEC 63182-1, Magnetic powder cores – Guidelines on dimensions and the limits of surface

irregularities – Part 1: General specification
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 63182-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Primary dimensions

The main dimensions of block-cores shall be those given in Table 1. The dimensions specified

in Table 1 are illustrated in Figure 1.
---------------------- Page: 7 ----------------------
– 6 – IEC 63182-4:2021 © IEC 2021
Figure 1 – Main dimensions of block-cores
Table 1 – Main dimensions of block-cores
A B C
Size mm mm mm
Min. Max. Min. Max. Min. Max.
B474128 47,0 48,0 40,5 41,5 27,0 28,0
B502015 49,5 50,5 19,5 20,5 14,5 15,5
B502020 49,5 50,5 19,5 20,5 19,5 20,5
B503015 49,5 50,5 29,5 30,5 14,5 15,5
B503020 49,5 50,5 29,5 30,5 19,5 20,5
B602015 59,5 60,5 19,5 20,5 14,5 15,5
B602020 59,5 60,5 19,5 20,5 19,5 20,5
B603015 59,5 60,5 29,5 30,5 14,5 15,5
B603020 59,5 60,5 29,5 30,5 19,5 20,5
B702015 69,5 70,5 19,5 20,5 14,5 15,5
B702020 69,5 70,5 19,5 20,5 19,5 20,5
B703015 69,5 70,5 29,5 30,5 14,5 15,5
B703020 69,5 70,5 29,5 30,5 19,5 20,5
B802015 79,5 80,5 19,5 20,5 14,5 15,5
B802020 79,5 80,5 19,5 20,5 19,5 20,5
B803015 79,5 80,5 29,5 30,5 14,5 15,5
B803020 79,5 80,5 29,5 30,5 19,5 20,5

NOTE For the 5030, 6030, 7030 and 8030 block-cores, 30,3 mm is also used as the nominal dimension B by

many suppliers and users. For these cases, B can be specified as 29,8 mm min. / 30,8 mm max.

The core size designation contains a combination of six numbers: the first and second indicate the length A of

the core, the third and fourth its width B, and the fifth and sixth its height C.

5 Limits of surface irregularities
5.1 Definition of surface irregularities
Surface irregularities are defined in IEC 63182-1.
---------------------- Page: 8 ----------------------
IEC 63182-4:2021 © IEC 2021 – 7 –
5.2 Examples of surface irregularities
Figure 2 shows different examples of surface irregularities of block-cores.
Figure 2 – Examples of surface irregularities
5.3 Chips and ragged edges
5.3.1 General

The minimum area for a chip is taken as 0,5 mm , so as to be distinguishable to the naked eye.

The maximum cumulative area of chips on a surface, regardless of core size, is 50 mm . Area

and length references for visual inspection are given in IEC 63182-1.
5.3.2 Chips

Figure 2 shows the chips at various locations for block-cores. The maximum cumulative area of

chips on a surface is 3 % of the area of the surface or 50 mm , whichever is smaller.

5.3.3 Ragged edges

Figure 2 shows the ragged edges at various locations for block-cores. The total length of the

ragged edges shall be less than 20 % of the length of the relevant edges.
5.4 Cracks

Figure 2 shows the cracks at various locations for block-cores. Up to three cracks per surface

are allowed, as long as each crack is less than 25 % of the reference dimension and no crack

is in contact with the edge at both ends. The reference dimension is the smallest dimension of

a surface.
5.5 Flash

The maximum dimension of flashes on the surface shall not exceed 0,2 mm (see Figure 2).

---------------------- Page: 9 ----------------------
– 8 – IEC 63182-4:2021 © IEC 2021
5.6 Rust

Figure 2 shows rust at various locations for block-cores. The area of rust shall not exceed the

following limits:

– the cumulative area of the rust located on the same surface shall not exceed 25 % of the

surface area;

– rust should not influence the electromagnetic properties or the mechanical strength of the

core. Otherwise, it is not acceptable.
5.7 Discoloration
Generally, no limit of the disco
...

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