1、 IEC TR 63090 Edition 1.0 2017-05 TECHNICAL REPORT Dimensional tolerances of ferrite cores IEC TR 63090:2017-05(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reprod
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10、ion or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC TR 63090 Edition 1.0 2017-05 TECHNICAL REPORT Dimensional tolerances of ferrite cores INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.100.10 ISBN 978-2-8322-4349-7 Registered trademark of the International El
11、ectrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC TR 63090:2017 IEC 2017 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 7 2 Normative references 7 3 Terms and definitions 7 4 Summary of dimensional tolerances of ferrit
12、e cores . 7 4.1 General . 7 4.2 Dimensional tolerances of E-cores 7 4.3 Dimensional tolerances of ring cores 9 4.4 Dimensional tolerances of ETD/EER-cores . 11 4.5 Dimensional tolerances of planar ER-cores . 13 5 Conclusion 15 Annex A (informative) Data of dimensional tolerances . 16 A.1 E-core . 16
13、 A.2 Ring core 34 A.3 ETD/EER-core 43 A.4 Planar ER-core . 49 Bibliography 55 Figure 1 Cause-and-effect diagram of variations in dimension . 6 Figure 2 E-core 7 Figure 3 Dimensional tolerances of each part of E-cores 9 Figure 4 Ring core . 10 Figure 5 Dimensional tolerances of each part of ring core
14、s 11 Figure 6 ETD/EER-core . 11 Figure 7 Dimensional tolerances of each part of ETD/EER-cores . 13 Figure 8 Planar ER-core 14 Figure 9 Dimensional tolerances of each part of planar ER-cores 15 Table 1 IEC standards of ferrite core dimensions . 5 Table 2 Dimensional tolerances recommended for a new d
15、esign of E-cores 8 Table 3 Dimensional tolerances recommended for a new design of ring cores 10 Table 4 Dimensional tolerances recommended for a new design of ETD/EER-cores . 12 Table 5 Dimensional tolerances recommended for a new design of planar ER-cores . 14 Table A.1 Dimensional tolerances of ea
16、ch part (E-core) . 16 Table A.2 Dimensional tolerances of each part (Ring-core) 34 Table A.3 Dimensional tolerances of each part (ETD/EER-core) 43 Table A.4 Dimensional tolerances of each part (Planar ER-core) . 49 IEC TR 63090:2017 IEC 2017 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ DIMENSIONAL
17、TOLERANCES OF FERRITE 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 conce
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26、ses 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) Atten
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28、al committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. IEC TR 63090, which is a Technical Report, has been prepared by IEC technical committee 51
29、: Magnetic components, ferrite and magnetic powder materials. The text of this technical report is based on the following documents: Enquiry draft Report on voting 51/1166/DTR 51/1186/RVDTR Full information on the voting for the approval of this technical report can be found in the report on voting
30、indicated in the above table. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 IEC TR 63090:2017 IEC 2017 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.
31、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. IMPORTANT The colour inside logo on the cover page of this publication in
32、dicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. IEC TR 63090:2017 IEC 2017 5 INTRODUCTION This document shows the dimensional tolerances of ferrite cores that are gene
33、rally used by ferrite core suppliers. As a reference, this is useful for ferrite core suppliers and users when they design ferrite cores and/or the components which use the ferrite cores. IEC has published international standards regarding ferrite core dimensions and their tolerances, as listed in t
34、he Table 1, and core sizes in each core shape were chosen from industrial standards from Europe, Japan and USA. However, there are some cases that lack unity in the dimensional tolerances even if ferrite core dimensions are close. Because many new sizes are still designed for the E, ETD/EER, planar
35、ER and ring core, this document gives information about the dimensional tolerances for reference dimensions of each core shape. Table 1 IEC standards of ferrite core dimensions IEC standard Current standard IEC 62317-1, Ferrite cores Dimensions Part 1: General specification / IEC 62317-2, Ferrite co
36、res Dimensions Part 2: Pot-cores for use in telecommunications, power supply, and filter applications / IEC 62317-3, Ferrite cores Dimensions Part 3: Half-pot cores (future standard) IEC 62323 IEC 62317-4, Ferrite cores Dimensions Part 4: RM-cores and associated parts / IEC 62317-5, Ferrite cores Di
37、mensions Part 5: EP-cores and associated parts for use in inductors and transformers / IEC 62317-6, Ferrite cores Dimensions Part 6: ETD-cores for use in power supplies / IEC 62317-7, Ferrite cores Dimensions Part 7: EER-cores / IEC 62317-8, Ferrite cores Dimensions Part 8: E-cores / IEC 62317-9, Fe
38、rrite cores Dimensions Part 9: Planar cores / IEC 62317-10, Ferrite cores Dimensions Part 10: PM cores (future standard) IEC 61247 IEC 62317-11, Ferrite cores Dimensions Part 11: EC-cores for use in power supply applications / IEC 62317-12, Ferrite cores Dimensions Part 12: Ring cores / IEC 62317-13
39、, Ferrite cores Dimensions Part 13: PQ-cores for use in power supply applications / IEC 62317-14, Ferrite cores Dimensions Part 14: EFD-cores for use in power supply applications / Cause of variations in dimension The shrinkage of powders, the density of mouldings, the deformation of ferrite cores,
40、etc., are considered as causes of variations in dimension. They are gathered in the following cause-and-effect diagram in Figure 1. 6 IEC TR 63090:2017 IEC 2017 Figure 1 Cause-and-effect diagram of variations in dimension Consideration of the dimensional tolerance The dimensional tolerance is consid
41、ered according to the processing conditions, and the core part is classified into the following three conditions: decided according to the mould and sintering, or decided according to the press direction, or grinding direction. Sintering powder Profile deformation (see IEC 60401-1:2002, 6.4.2) Defor
42、mation Shrinkage Deflection-in or -out Sintered density Cause of variations in dimension Setting gap (dimension) Moulding density Setting gap (dimension) Non-uniformity of the density Machining Shaping (see IEC 60401-1:2002, 6.1.4.1 or 6.1.4.2) IEC IEC TR 63090:2017 IEC 2017 7 DIMENSIONAL TOLERANCES
43、 OF FERRITE CORES 1 Scope This document gives guidelines on the dimensional tolerances of ferrite cores. This document is considered as general information useful in the dialogue between ferrite core suppliers and users. 2 Normative references There are no normative references in this document. 3 Te
44、rms and definitions No terms and definitions are listed in this document. 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
45、 Summary of dimensional tolerances of ferrite cores 4.1 General Figures 3, 5, 7 and 9 show the plots of the specifications of IEC standards and the catalogues of some ferrite core suppliers. The recommended boundary is the line connected by the supposed maximum points of the specifications of the IE
46、C standards. Most of the points are under the recommended boundary. 4.2 Dimensional tolerances of E-cores Figure 2 represents typical core geometry with the standard dimension nomenclature applied. Dimensional tolerances to recommend for a new design of E-cores are shown in Table 2. The scatter diag
47、ram of dimensional tolerances of each part of E-cores is shown in Figure 3. Dimensional tolerances of each part in the specifications of IEC standards and the catalogues of some ferrite core suppliers are shown in Table A.1. Figure 2 E-core D B C E F A IEC 8 IEC TR 63090:2017 IEC 2017 Table 2 Dimens
48、ional tolerances recommended for a new design of E-cores Dimension Decided according to mould and sintering Decided according to press direction Grinding direction min max dimension A dimension E dimension F dimension C dimension B dimension D mm mm tolerance % tolerance % tolerance % tolerance % to
49、lerance % tolerance % 5 10 4,5 3,5 5,0 5,0 3,0 4,0 10 15 4,0 2,5 3,5 3,0 2,5 3,0 15 20 4,0 2,5 3,0 3,0 2,5 2,5 20 25 3,0 2,5 2,0 2,0 1,5 2,0 25 30 2,5 2,5 2,0 1,5 30 35 2,5 2,0 1,0 35 40 2,0 2,0 1,0 40 50 2,0 2,0 50 80 2,0 IEC TR 63090:2017 IEC 2017 9 a) Dimension A b) Dimension E c) Dimension F d) Dimension C e
