EN 60404-5-2015 en Magnetic materials - Part 5 Permanent magnet (magnetically hard) materials - Methods of measurement of magnetic properties.pdf

1、BSI Standards PublicationMagnetic materialsPart 5: Permanent magnet (magnetically hard) materials Methods of measurement of magnetic propertiesBS EN 60404-5:2015National forewordThis British Standard is the UK implementation of EN 60404-5:2015. It isidentical to IEC 60404-5:2015. It supersedes BS EN

2、 60404-5:2007 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/108, Magnetic Alloys and Steels.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necess

3、ary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 82868 3ICS 17.220.20; 29.030Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standa

4、rd was published under the authority of theStandards Policy and Strategy Committee on 30 June 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60404-5:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60404-5 May 2015 ICS 17.220.20; 29.030 Supersedes

5、EN 60404-5:2007 English Version Magnetic materials - Part 5: Permanent magnet (magnetically hard) materials - Methods of measurement of magnetic properties (IEC 60404-5:2015) Matriaux magntiques - Partie 5: Aimants permanents (magntiques durs) - Mthodes de mesure des proprits magntiques (IEC 60404-5

6、:2015) Magnetische Werkstoffe - Teil 5: Dauermagnet- (hartmagnetische) Werkstoffe - Verfahren zur Messung magnetischer Eigenschaften (IEC 60404-5:2015) This European Standard was approved by CENELEC on 2015-05-21. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which st

7、ipulate 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 any CENELEC member. This Eur

8、opean 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 official versions. CENELEC m

9、embers 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, Luxembourg, Malta, the Netherlands,

10、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-CENELEC Management Centre: Av

11、enue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60404-5:2015 E BS EN 60404-5:2015EN 60404-5:2015 - 2 - Foreword The text of document 68/497/FDIS, future edition 3 of IEC 60404-5, prepared by IEC/

12、TC 68 “Magnetic alloys and steels“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60404-5:2015. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (d

13、op) 2016-02-21 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-05-21 This document supersedes EN 60404-5:2007. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/o

14、r CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60404-5:2015 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to

15、be added for the standard indicated : IEC 60404-8-1 NOTE Harmonized as EN 60404-8-1. BS EN 60404-5:2015- 3 - EN 60404-5:2015 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normat

16、ively 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 (including any amendments) applies. NOTE 1 When an International Publication has been modified by c

17、ommon 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. Publication Year Title EN/HD Year IEC 60050 series International electrotechnical vocabulary - -

18、 BS EN 60404-5:2015 2 IEC 60404-5:2015 IEC 2015 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions 6 4 Electromagnet and conditions for magnetization 6 4.1 General . 6 4.2 Geometrical conditions . 8 4.3 Electromagnetic conditions . 8 5 Test specimen . 9

19、 6 Determination of the magnetic flux density 10 7 Determination of the magnetic polarization 10 8 Measurement of the magnetic field strength. 11 9 Determination of the demagnetization curve 12 9.1 General . 12 9.2 Principle of determination of the demagnetization curve, test specimen magnetized in

20、the electromagnet 12 9.3 Principle of determination of the demagnetization curve, test specimen magnetized in a superconducting coil or pulse magnetizer 13 10 Determination of the principal characteristics . 14 10.1 Remanent flux density 14 10.2 (BH)maxproduct . 14 10.3 Coercivities HcBand HcJ14 10.

21、4 Determination of the recoil line and the recoil permeability 14 11 Reproducibility . 15 12 Test report . 15 Annex A (normative) Influence of the air-gap between the test specimen and the pole pieces . 17 Annex B (informative) Influence of the ambient temperature on measurement results 18 Bibliogra

22、phy 19 Figure 1 Demagnetization curve showing (BH)maxpoint 7 Figure 2 Schematic diagram of electromagnet 8 Figure 3 Measuring circuit (schematic) . 13 Figure 4 Demagnetization curve and recoil loop . 15 Figure A.1 Air-gap 17 Table 1 Reproducibility of the measurement of the magnetic characteristics

23、of permanent magnet materials . 15 Table A.1 d/l ratios . 17 Table B.1 Temperature coefficients of Brand HcJof permanent magnet materials . 18 BS EN 60404-5:2015IEC 60404-5:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MAGNETIC MATERIALS Part 5: Permanent magnet (magnetically hard) mat

24、erials Methods of measurement of magnetic properties 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-operati

25、on on all questions concerning standardization in the electrical and electronic fields. To this 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 “I

26、EC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee 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 prepara

27、tion. IEC collaborates closely with the International Organization for Standardization (ISO) in 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 consens

28、us of opinion on the relevant subjects since each technical committee has representation from all 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

29、 made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held 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 tra

30、nsparently to the maximum extent possible in their national and regional publications. Any divergence 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

31、 certification bodies provide conformity assessment services and, in some areas, access to IEC 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 liabili

32、ty shall attach to IEC or its directors, employees, servants or agents including individual experts 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 (includi

33、ng legal fees) and expenses 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 th

34、is publication. 9) Attention is drawn to the possibility that some of the elements of this IEC 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 60404-5 has been prepared by IEC technical commi

35、ttee 68: Magnetic alloys and steels. This third edition cancels and replaces the second edition published in 1993 and Amendment 1:2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: adaption of t

36、he measurement methods and test conditions to newly introduced magnetically hard materials with coercivity values HcJhigher than 2 MA/m; update of the temperature conditions to allow the measurement of new materials with high temperature coefficients. BS EN 60404-5:2015 4 IEC 60404-5:2015 IEC 2015 T

37、he text of this standard is based on the following documents: FDIS Report on voting 68/497/FDIS 68/505/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/

38、IEC Directives, Part 2. A list of all parts in the IEC 60404 series, published under the general title Magnetic materials, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site und

39、er “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. BS EN 60404-5:2015IEC 60404-5:2015 IEC 2015 5 INTRODUCTION The previous edition of IEC 60404-5 was issued in October 19

40、93 and amended in 2007. Since then, new applications of NdFeB sintered magnetic materials with intrinsic coercivity, HcJ, higher than 2 MA/m for hybrid electric vehicles and fully electric vehicles have appeared. Thus, IEC TC68 decided in 2011 at their meeting in Ghent to revise IEC 60404-5. For the

41、 measurement of the coercivity relating to polarization, HcJ, at values higher than 2 MA/m and the measurement of magnetic properties at elevated temperatures, the methods described in the non-normative Technical Reports IEC TR 61807 and IEC TR 62331 can be considered. The ambient temperature previo

42、usly recommended was (23 5) C. However, for permanent magnet materials such as NdFeB and hard ferrites that have large temperature coefficients, it is strongly recommended that the ambient temperature should be controlled within this range to 1 C or better. It is desirable to apply this temperature

43、recommendation for other hard magnet materials. This recommendation was already included in IEC 60404-5:1993/AMD1:2007. BS EN 60404-5:2015 6 IEC 60404-5:2015 IEC 2015 MAGNETIC MATERIALS Part 5: Permanent magnet (magnetically hard) materials Methods of measurement of magnetic properties 1 Scope The p

44、urpose of this part of IEC 60404 is to define the method of measurement of the magnetic flux density, magnetic polarization and the magnetic field strength and also to determine the demagnetization curve and recoil line of permanent magnet materials, such as those specified in lEC 60404-8-1 11, the

45、properties of which are presumed homogeneous throughout their volume. The performance of a magnetic system is not only dependent on the properties of the permanent magnet material but also on the dimensions of the system, the air-gap and other elements of the magnetic circuit. The methods described

46、in this part of IEC 60404 refer to the measurement of the magnetic properties in a closed magnetic circuit. 2 Normative references 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 editi

47、on cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050 (all parts), International Electrotechnical Vocabulary (available at http:/www.electropedia.org) 3 Terms and definitions For the purposes of this document, the terms

48、and definitions given in IEC 60050-121, IEC 60050-151 and IEC 60050-221 apply. 4 Electromagnet and conditions for magnetization 4.1 General For permanent magnet materials, this part of IEC 60404 deals with both the coercivity HcB(the coercivity relating to the magnetic flux density) and the intrinsi

49、c coercivity HcJ(the coercivity relating to the magnetic polarization). The measurements specified in this part of IEC 60404 are for both the magnetic flux density, B, and the magnetic polarization, J, as a function of the magnetic field strength, H. These quantities are related by the following equation: B = 0H + J (1) _ 1Numbers in square brackets refer to the Bibliography. BS EN 60404-5:2015IEC 60404-5:2015 IEC 2015 7 where B is the magnetic flux dens