1、Ferrite cores DimensionsPart 12: Ring coresBS EN 62317-12:2016BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of EN 62317-12:2016. It isidentical to IEC 62317-12:2016.The UK participation in its preparat
2、ion was entrusted to TechnicalCommittee EPL/51, Transformers, inductors, magnetic components and ferrite materials.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract.
3、Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 88051 3ICS 29.100.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority
4、of theStandards Policy and Strategy Committee on 31 December 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 62317-12:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 62317-12 November 2016 ICS 29.100.10 English Version Ferrite cores - Dimensions -
5、Part 12: Ring cores (IEC 62317-12:2016) Noyaux de ferrite - Dimensions - Partie 12: Noyaux toriques (IEC 62317-12:2016) Ferritkerne - Mae - Teil 12: Ringkerne (IEC 62317-12:2016) This European Standard was approved by CENELEC on 2016-10-27. CENELEC members are bound to comply with the CEN/CENELEC In
6、ternal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to a
7、ny CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the o
8、fficial versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembour
9、g, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CE
10、NELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 62317-12:2016 E BS EN 62317-12:2016EN 62317-12:2016 2 European foreword The text of document 51/1128/CDV, future edition
11、 1 of IEC 62317-12, prepared by IEC/TC 51 “Magnetic components and ferrite materials“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62317-12:2016. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of
12、 an identical national standard or by endorsement (dop) 2017-07-27 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-10-27 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN
13、ELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 62317-12:2016 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following n
14、otes have to be added for the standards indicated: IEC 60401-2 NOTE Harmonized as EN 60401-2. IEC 60424-4 NOTE Harmonized as EN 60424-4. IEC 60317-1 NOTE Harmonized as EN 62317-1. BS EN 62317-12:2016EN 62317-12:2016 3 Annex ZA (normative) Normative references to international publications with their
15、 corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (inclu
16、ding any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Pub
17、lication Year Title EN/HD Year IEC 60205 - Calculation of the effective parameters of magnetic piece parts EN 60205 - BS EN 62317-12:2016 2 IEC 62317-12:2016 IEC 2016 CONTENTS FOREWORD 3 1 Scope .5 2 Normative references 5 3 Terms and definitions 5 4 Abbreviated terms .5 5 Primary standards .5 5.1 G
18、eneral 5 5.2 Dimensions of ring-cores .5 5.2.1 Designation of dimensions .5 5.2.2 Identification of standard sizes .6 5.2.3 Effective parameter values .6 5.2.4 Dimensional limits for standard sizes .6 5.3 Coating . 14 Bibliography . 15 Table 1 Ring core dimension designations .6 Table 2 Standard rin
19、g cores .7 Table 3 Effective parameters of ring cores .9 Table 4 Uncoated ring cores recommended dimensional limits . 12 BS EN 62317-12:2016IEC 62317-12:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FERRITE CORES DIMENSIONS Part 12: Ring cores FOREWORD 1) The International Electrotechn
20、ical 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
21、 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 C
22、ommittee 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
23、 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 a
24、ll 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
25、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 dive
26、rgence 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
27、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 exp
28、erts 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
29、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
30、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 62317-12 has been prepared IEC technical committee 51: Magnetic components, ferrite and magnetic powder materials. This first edition cancels a
31、nd replaces the first edition of IEC TR 61604 published in 1997. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC TR 61604: a) amendment of Clause 5 concerning the relationship between standard of European, Japanese
32、and U.S.A. sizes; b) addition of Subclause 5.3 concerning coating. BS EN 62317-12:2016 4 IEC 62317-12:2016 IEC 2016 The text of this standard is based on the following documents: CDV Report on voting 51/1128/CDV 51/1143/RVC Full information on the voting for the approval of this International Standa
33、rd 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 of the IEC 62317 series, under the general title Ferrite cores Dimensions, can be found on the IEC website. The committee has de
34、cided 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. A bil
35、ingual version of this publication may be issued at a later date. BS EN 62317-12:2016IEC 62317-12:2016 IEC 2016 5 FERRITE CORES DIMENSIONS Part 12: Ring cores 1 Scope This part of IEC 62317 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of rin
36、g-cores, also called toroid cores, and the effective parameter values to be used in calculations involving them. The selection of core sizes for this document is based on the philosophy of including those sizes which are industrial standards, meaning that they are in broad-based use within industry.
37、 See IEC 62317-1 for more detail concerning the philosophy of selecting core sizes to be included. 2 Normative references The following documents are 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 edit
38、ion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60205, Calculation of the effective parameters of magnetic piece parts 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain t
39、erminological 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 Abbreviated terms ID inside diameter OD outside diameter 5 Primary standards 5.1 General Compli
40、ance with the following requirements ensures mechanical interchangeability of complete assemblies and wound coils. 5.2 Dimensions of ring-cores 5.2.1 Designation of dimensions Table 1 describes the alphabetic character assignments for the dimensions of ferrite ring cores. BS EN 62317-12:2016 6 IEC 6
41、2317-12:2016 IEC 2016 Table 1 Ring core dimension designations Letter Dimension description A Outside diameter B Inside diameter C Height 5.2.2 Identification of standard sizes Table 2 shows the nominal dimensions for the range of standard ring cores. Table 2 also shows, where applicable, the origin
42、 and regional name of each standard size, whether from historical European sizes, historical Japanese sizes, or historical USA sizes. The previous IEC Technical Report, 61604, detailed the different ring sizes that were tooled and commonly used in the three distinct geographic regions. IEC TR 61604
43、laid the groundwork for the present standard, which reflects the more global nature of the industry, compared with the time when ferrite standards were evolving in different parts of the world. Manufacturers tend to have more globally complete offerings of ring sizes than before, leading to a profus
44、ion of different sizes. The number of different ring sizes used in total is quite large, far in excess of the 82 commonly known standard sizes shown here, for a couple of reasons: ring cores are relatively inexpensive to build tooling for, nor does a new ring core require an expensive new coil forme
45、r to be tooled up, meaning that custom ring cores are often commercially practical. Ferrite rings, lacking a residual air gap, such as E-cores and other shapes have at their mating surfaces, exhibit directly the full magnetic performance possible in the ferrite material, meaning that tooling up prec
46、isely optimal new dimensions can give a significant advantage to a designer who is optimizing for best possible performance. 5.2.3 Effective parameter values The effective parameter values for the standard ring cores are given in Table 3. For global practicality and simplicity, the effective paramet
47、ers in this document are calculated from the nominal dimensions assuming cores of rectangular cross section, and are useful for reference and comparison of cores. For cores having a cross section with an appreciable average rounding radius, more precise values can be calculated from the method given
48、 in IEC 60205, if required. 5.2.4 Dimensional limits for standard sizes The standard tolerance limits for uncoated ring cores are given in Table 4. Manufacturers may choose to offer looser standard limits for ferrite materials that exhibit greater process variability, or tighter limits for applicati
49、ons that justify higher processing and yield costs to achieve narrower dimensional range. The limits take account of shrinkage variation and warping during firing. The specification for out-of-round condition of the inner or outer circumference is that the inside diameter (ID) and outside diameter (OD) must stay within the indicated limits, measured at any point. Similarly, the specification for non-flat condition of the sides of a ring is that the height minimum and maximum must be ac
