IEC 63182-2:2020

IEC 63182-2 ®
Edition 1.0 2020-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic powder cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 2: Ring-cores
Noyaux en poudre magnétique comprimée – Lignes directrices concernant
les dimensions et les limites des irrégularités de surface –
Partie 2: Tores
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IEC 63182-2 ®
Edition 1.0 2020-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic powder cores – Guidelines on dimensions and the limits of surface

irregularities –
Part 2: Ring-cores
Noyaux en poudre magnétique comprimée – Lignes directrices concernant

les dimensions et les limites des irrégularités de surface –

Partie 2: Tores
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-8898-6

– 2 – IEC 63182-2:2020 © IEC 2020
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Primary standards . 5
4.1 General . 5
4.2 Dimension descriptions . 6
4.3 Dimensions of ring-cores . 6
4.4 Chamfered edges. 6
4.5 Effective parameter values . 7
5 Limits of surface irregularities . 8
5.1 Cracks . 8
5.2 Peeling . 8
5.3 Pinholes . 9
5.4 Sharp chamfered edge . 9
5.5 Bubbles . 10
5.6 Unevenness . 10
Annex A (normative) Calculation method for the effective parameters of ring-cores . 11

Figure 1 – Dimensions of ring-cores . 6
Figure 2 – Chamfered edges of ring-cores . 6
Figure 3 – Cracks . 8
Figure 4 – Peeling. 9
Figure 5 – Pinholes . 9
Figure 6 – Sharp chamfered edge . 9
Figure 7 – Bubbles . 10
Figure 8 – Unevenness . 10

Table 1 – Dimensions descriptions . 6
Table 2 – Dimensions and geometrically calculated values for ring-cores . 7

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MAGNETIC POWDER CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –

Part 2: Ring-cores
FOREWORD
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International Standard IEC 63182-2 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:
FDIS Report on voting
51/1348/FDIS 51/1352/RVD
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.

– 4 – IEC 63182-2:2020 © IEC 2020
A list of all parts of 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 "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.
MAGNETIC POWDER CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –

Part 2: Ring-cores
1 Scope
This part of IEC 63182 specifies the dimensions that are of importance for mechanical
interchangeability for a preferred range of ring-cores (also called toroids) made of magnetic
powder, the effective parameter values to be used in c
...