prEN IEC 60205:2024

SLOVENSKI STANDARD
01-junij-2024
Izračun efektivnih parametrov magnetnih sestavnih delov
Calculation of the effective parameters of magnetic piece parts
Berechnung der effektiven Kernparameter magnetischer Formteile
Calcul des paramètres effectifs des pièces magnétiques
Ta slovenski standard je istoveten z: prEN IEC 60205:2024
ICS:
29.100.10 Magnetne komponente Magnetic components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

51/1486/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60205 ED5
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-04-12 2024-07-05
SUPERSEDES DOCUMENTS:
51/1456/CD, 51/1478/CC
IEC TC 51 : MAGNETIC COMPONENTS, FERRITE AND MAGNETIC POWDER MATERIALS
SECRETARIAT: SECRETARY:
Japan Mr Naoki Kawakubo
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
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final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Calculation of the effective parameters of magnetic piece parts

PROPOSED STABILITY DATE: 2030
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
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IEC CDV 60205 © IEC 2024 2 51/1486/CDV

1 CONTENTS
3 FOREWORD . 4
4 1 Scope . 6
5 2 Normative references . 6
6 3 Terms and definitions . 6
7 4 Basic rules applicable to this standard . 6
8 5 Formulae for the various types of cores . 7
9 5.1 Ring cores . 7
10 5.1.1 Ring cores in general . 7
11 5.1.2 For ring cores of rectangular cross-section with sharp corners . 8
12 5.1.3 For ring cores of rectangular cross-section with an appreciable average
13 rounding radius r . 8
14 5.1.4 For ring cores of rectangular cross-section with appreciable chamfer c . 8
15 5.1.5 For ring cores of trapezoidal cross-section with sharp corners . 8
16 5.1.6 For ring cores of trapezoidal cross-section with an appreciable average
17 rounding radius r . 8
18 5.1.7 For ring cores of cross-section with circular arc frontal sides . 8
19 5.2 Pair of U-cores . 9
20 5.2.1 Pair of U-cores of rectangular section . 9
21 5.2.2 Pair of UR-cores . 9
22 5.2.3 Pair of URS-cores of rectangular-circular sections . 10
23 5.3 Pair of E-cores of rectangular section . 11
24 5.4 Pair of ETD/EER-cores . 12
25 5.5 Pair of pot-cores . 13
26 5.6 Pair of RM-cores . 16
27 5.7 Pair of EP-cores. 19
28 5.8 Pair of PM-cores . 21
29 5.9 Pair of EL-cores . 23
30 5.10 Pair of ER-cores (low profile) . 25
31 5.11 Pair of PQ-cores . 28
32 5.12 Pair of EFD-cores . 33
33 5.13 Pair of E planar-cores . 34
34 5.14 Pair of EC-cores . 37
36 Figure 1 – Ring cores . 7
37 Figure 2 – Pair of U-cores of the rectangular section . 9
38 Figure 3 – Pair of UR-cores of rounded section . 9
39 Figure 4 – Pair of URS-cores of rectangular-circular sections . 10
40 Figure 5 – Pair of E-cores of rectangular section . 11
41 Figure 6 – Pair of ETD/EER-cores . 12
42 Figure 7 – Pair of pot-cores . 14
43 Figure 8 – Pair of RM-cores . 17
44 Figure 9 – Pair of EP-cores . 20

51/1486/CDV 3 IEC CDV 60205 © IEC 2024

45 Figure 10 – Pair of PM-cores . 21
46 Figure 11 – Pair of EL-cores . 23
47 Figure 12 – PLT(plate)-cores . 23
48 Figure 13 – Pair of ER-cores (low profile) . 26
49 Figure 14 – PLT(plate)-cores . 26
50 Figure 15 – Pair of PQ-cores . 29
51 Figure 16 – PQ-cores . 30
52 Figure 17 – PLT(plate)-cores . 30
53 Figure 18 – Pair of EFD-cores . 33
54 Figure 19 – Pair of E planar-cores . 35
55 Figure 20 – PLT(plate)-cores . 35
56 Figure 21 – Pair of EC-cores . 37
IEC CDV 60205 © IEC 2024 4 51/1486/CDV

59 INTERNATIONAL ELECTROTECHNICAL COMMISSION
60 ____________
62 CALCULATION OF THE EFFECTIVE PARAMETERS
63 OF MAGNETIC PIECE PARTS
65 FOREWORD
66 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
67 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
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75 agreement between the two organizations.
76 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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86 the latter.
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90 6) All users should ensure that they have the latest edition of this publication.
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96 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
97 indispensable for the correct application of this publication.
98 9) IEC draws attention to the possibility that the implementation of this document may involve the use of a patent.
99 IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect
100 thereof. As of the date of publication of this document, IEC had not received notice of a patent, which may be
101 required to implement this document. However, implementers are cautioned that this may not represent the
102 latest information, which may be obtained from the patent database available at https://patents.iec.ch and/or
103 www.iso.org/patents. IEC shall not be held responsible for identifying any or all such patent rights.
104 International Standard IEC 60205 has been prepared by IEC technical committee 51:
105 Magnetic components, ferrite and magnetic powder materials.
106 This fifth edition cancels and replaces the fourth edition published in 2016. This edition
107 constitutes a technical revision.
108 This edition includes the following significant technical changes with respect to the previous
109 edition:
110 a) addition, in 5.2.3, of the drawing and the formulae of pair of URS-cores of rectangular-
111 circular section;
51/1486/CDV 5 IEC CDV 60205 © IEC 2024

112 b) using, in 5.9, 5.10, 5.11 and 5.13, of the conventional calculation formula that includes " B1-D " is
113 limited for the x-x cores (x is EL, ER, PQ or E) and addition new formulae for x-PLT cores that
114 replaces " B -D " with "(B -D+B )/2";
1 1 2
115 c) addition, in 5.9, 5.10, 5.11 and 5.13, of formulae of l1 and l3 for x-PLT cores (x is EL, ER,
116 PQ or E) which is different from the l and l of x-x cores;
1 3
117 d) addition of formula A in each subclause from 5.2.1 to 5.14.
min
119 The text of this standard is based on the following documents:
FDIS Report on voting
51/xxxx/FDIS 51/xxxx/RVD
121 Full in
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