1、BRITISH STANDARD BS EN 62044-3:2001 Cores made of soft magnetic materials Measuring methods Part 3: Magnetic properties at high excitation level The European Standard EN 62044-3:2001 has the status of a British Standard ICS 29.100.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT
2、 LAWBS EN 62044-3:2001 This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 August 2001 BSI 08-2001 ISBN 0 580 38028 9 National foreword This British Standard
3、 is the official English language version of EN 62044-3:2001. It is identical with IEC 62044-3:2000. The UK participation in its preparation was entrusted to Technical Committee EPL/51, Transformer, Inductors, Magnetic components and ferrite materials, which has the responsibility to: A list of orga
4、nizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering syst
5、em to the other, publication may contain identifiers from both systems. Cross-references The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by usi
6、ng the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity
7、 from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summar
8、y of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 32, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsE
9、UROPEAN STANDARD EN 62044-3 NORME EUROPENNE EUROPISCHE NORM May 2001 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELE
10、C - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62044-3:2001 E ICS 29.030; 29.100.10 English version Cores made of soft magnetic materials - Measuring methods Part 3: Magnetic properties at high excitation level (IEC 62044-3:2000) Noyau
11、x en matriaux magntiques doux - Mthodes de mesure Partie 3: Proprits magntiques niveau lev dexcitation (CEI 62044-3:2000) Kerne aus weichmagnetischen Materialien - Messverfahren Teil 3: Messungen der magnetischen Eigenschaften im Leistungsapplikationsbereich (IEC 62044-3:2000) This European Standard
12、 was approved by CENELEC on 2001-03-01. CENELEC members are bound to comply with the CEN/CENELEC Internal 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
13、such national standards may be obtained on application to the Central Secretariat or to any 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 ow
14、n language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Port
15、ugal, Spain, Sweden, Switzerland and United Kingdom.EN 44026-3:1002 - 2 - Foreword The text of document 51/573/FDIS, future edition 1 of IEC 62044-3, prepared by IEC TC 51, Magnetic components and ferrite materials, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 620
16、44-3 on 2001-03-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2001-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2
17、004-03-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annexes A to E are informative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the Interna
18、tional Standard IEC 62044-3:2000 was approved by CENELEC as a European Standard without any modification. _ Page2 EN620443:2001 BSI08200162044-3 IEC:2000 3 CONTENTS Page Clause 1 Scope 4 2 Normative references. 4 3 Terms, definitions and symbols 5 3.1 Definitions 5 3.2 Symbols . 6 4 General precauti
19、ons for measurements at high excitation level 7 4.1 General statements 7 4.2 Measuring coil 7 4.3 Mounting of cores consisting of more than one part 8 4.4 Measuring equipment . 9 5 Specimens11 6 Measuring procedures 11 6.1 General procedure.11 6.2 Measuring method for the (effective) amplitude perme
20、ability12 6.3 Measuring methods for the power loss.14 7 Information to be stated16 8 Test report17 Annex A (informative) Basic circuits and related equipment for the measurement of amplitude permeability 18 Annex B (informative) Root-mean-square method for the measurement of power loss Example of a
21、circuit and related procedure20 Annex C (informative) Multiplying methods for the measurement of power loss Basic circuits and related measurement procedures23 Annex D (informative) Reflection method for the measurement of power loss Basic circuit and related measurement procedures27 Annex E (inform
22、ative) Calorimetric measurement methods for the measurement of power loss.29 Annex ZA (nomative) Normative references to international publications with their corresponding European publications .32 Page3 EN620443:2001 BSI08200162044-3 IEC:2000 4 CORES MADE OF SOFT MAGNETIC MATERIALS MEASURING METHO
23、DS Part 3: Magnetic properties at high excitation level 1 Scope This standard provides measuring methods for power loss and amplitude permeability of magnetic cores forming the closed magnetic circuits intended for use at high excitation levels in inductors, chokes, transformers and similar devices
24、for power electronics applications. The methods given in this standard can cover the measurement of magnetic properties for frequencies ranging practically from d.c. to 10 MHz, and even possibly higher, for the calorimetric and reflection methods. The applicability of the individual methods to speci
25、fic frequency ranges is dependent on the level of accuracy that is to be obtained. The methods in this standard are basically the most suitable for sine-wave excitations. Other periodic waveforms can also be used; however, adequate accuracy can only be obtained if the measuring circuitry and instrum
26、ents used are able to handle and process the amplitudes and phases of the signals involved within the frequency spectrum corresponding to the given induction and field strength waveforms with only slightly degraded accuracy. NOTE It may be necessary for some magnetically soft metallic materials to f
27、ollow specific general principles, customary for these materials, related to the preparation of specimens and prescribed calculations. These principles are formulated in IEC 60404-8-6. 2 Normative references The following normative documents contain provisions which, through reference in this text,
28、constitute provisions of this part of IEC 62044. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 62044 are encouraged to investigate the possibility of applying the most recent editions
29、of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60050(221):1990, International Electrotechnical Vocabulary (IEV) Chapter 221
30、: Magnetic materials and components Amendment 1 (1993) Amendment 2 (1999) IEC 60205:1966, Calculation of the effective parameters of magnetic piece parts IEC 60367-1:1982, Cores for inductors and transformers for telecommunications Part 1: Measuring methods IEC 60401:1993, Ferrite materials Guide on
31、 the format of data appearing in manufacturers catalogues of transformer and inductor cores IEC 60404-8-6:1999, Magnetic materials Part 8-6: Specifications for individual materials Soft magnetic metallic materials IEC 61332:1995, Soft ferrite material classification Page4 EN620443:2001 BSI0820016204
32、4-3 IEC:2000 5 3 Terms, definitions and symbols 3.1 Definitions For the purposes of this International Standard, the following definitions apply in addition to those of IEC 60050(221). 3.1.1 (effective) amplitude permeability (symbols: amplitude permeability: a , effective amplitude permeability: ea
33、 ) magnetic permeability obtained from the peak value of the effective magnetic induction, e B , and the peak value of the magnetic field strength, e H , at the stated value of either, when the magnetic induction and magnetic field vary periodically with time and with an average of zero, and the mat
34、erial is initially in a specified neutralized state NOTE 1 This definition differs from that of IEC 60050 221-03-07. NOTE 2 Two amplitude permeabilities are in common use, namely: that in which the peak values apply to the actual waveforms of the induction and field strength, that in which the peak
35、values apply to the fundamental components of waveforms of the induction and the field strength. NOTE 3 The induction and the field strength and, consequently, the amplitude permeability may even be quasi- static quantities, provided the core is cyclically magnetized and no excursion of the B-H curv
36、e appears. 3.1.2 maximum (effective) amplitude permeability (symbol ea max ) maximum value of the (effective) amplitude permeability when the amplitude of excitation ( e B or e H ) is varied NOTE This definition differs from that of IEC 60050 221-03-10. 3.1.3 excitation either induction or field str
37、ength for which the waveform and amplitude both remain within the specified tolerance NOTE When the induction (field strength) mode of excitation is chosen, the resultant waveform of field strength (induction) may be distorted with respect to the excitation waveform due to the non-linear behaviour o
38、f the magnetic material. 3.1.4 high excitation level excitation at which the permeability depends on excitation amplitude (particularly at low frequencies) and/or at which the power loss results in a noticeable temperature rise (particularly at high frequencies) 3.1.5 sinusoidal excitation excitatio
39、n of harmonic content of less than 1 % 3.1.6 exciting winding winding of measuring coil to which the exciting voltage is applied or through which the exciting current is flowing Page5 EN620443:2001 BSI08200162044-3 IEC:2000 6 3.1.7 voltage sensing winding unloaded winding of a measuring coil across
40、which the electromotive force induced by the excitation may be determined 3.1.8 measuring winding winding, usually secondary, loaded or unloaded, which can be used for measurement apart from the exciting and/or voltage sensing winding 3.1.9 power loss power absorbed by the core 3.2 Symbols All the f
41、ormulae in this standard use basic SI units. When multiples or sub-multiples are used, the appropriate power of 10 shall be introduced. A eeffective cross-sectional area of the core e B peak value of the effective induction in the coref frequency e H peak value of the effective magnetic field streng
42、th in the core l eeffective magnetic path length of the core L inductance i instantaneous value of the current I current N number of turns of winding of the measuring coil P power loss in the core Q cquality factor of the core for a given frequency R resistance t time T temperature u instantaneous v
43、alue of the voltage U voltage V e effective volume of the core relative error, deviation, etc. absolute error, deviation, etc. ea(effective) amplitude permeability 0 magnetic constant = 7 10 4 H/m the number 3,14159. phase shift angular frequency = 2 f NOTE 1 Additional subscript, upper script, etc.
44、 gives a more specific meaning to the given symbol. NOTE 2 Symbols which are used sporadically are defined in the place where they appear in the text. NOTE 3 Effective parameters, such as effective magnetic path length, l e , effective cross-sectional area, A e , and effective volume of the core, V
45、e , are calculated in accordance with IEC 60205. NOTE 4 In the further text of this standard, the terms induction and field strength stand for the shortened terms magnetic induction and magnetic field strength. Page6 EN620443:2001 BSI08200162044-3 IEC:2000 7 4 General precautions for measurements at
46、 high excitation level 4.1 General statements 4.1.1 Relation to practice The measuring conditions, methods and procedures shall be chosen in such a way that the measured results are suitable for predicting the performance of the core under practical circumstances. This does not imply that all these
47、stipulations, especially those related to the excitation waveforms, have to correspond to terms encountered in practice. 4.1.2 Core effective parameters and material properties Since the core is in general of non-uniform cross-section and generally has non-uniformly distributed windings along the co
48、re path, the measurement does not yield the amplitude permeability and the power loss of the material, but the effective values of these parameters appropriate to the effective induction e B and the effective field strength e H in the core. For the measurement of the amplitude permeability and the p
49、ower loss of the material, the core shall have a ring or toroidal shape in which the ratio of outer to inner diameter should not be greater than 1,4 and should have windings distributed uniformly, close to the core, of inductive coupling coefficient practically equal to unity. 4.1.3 Reproducibility of the magnetic state To obliterate various remanence and time effects in the core material, the mea
