EN 10280-2001 en Magnetic materials - Methods of measurement of the magnetic properties of electrical sheet and strip by means of a single sheet tester (Incorporates Amendment A1 2.pdf

1、BRITISH STANDARDBS EN 10280:2001 +A1:2007Magnetic materials Methods of measurement of the magnetic properties of electrical sheet and strip by means of a single sheet testerICS 29.030g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3

2、g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 10280:2001+A1:2007of the Standards Committee and comes into effect on 15 April 2001 BSI 2008ISBN 978 0 580 64204 3National forewordThis British Standard is the UK implementation of EN 10280:2001+A1:2007. It supe

3、rsedes BS EN 10280:2001 which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.request to its secr

4、etary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsImplementation

5、 of CEN amendment A1:2007The UK participation in its preparation was entrusted to Technical Committee A list of organizations represented on this committee can be obtained on ISE/NFE/5, Magnetic alloys and steels. 30 November 2008published under the authorityThis British Standard wasEUROPEAN STANDAR

6、D NORME EUROPENNE EUROPISCHE NORM EN 10280:2001+A1 January 2007 ICS 29.030 Supersedes EN 10280:2001English Version Magnetic materials - Methods of measurement of the magnetic properties of electrical sheet and strip by means of a single sheet tester Matriaux magntiques - Mthodes de mesure des caract

7、ristiques magntiques des tles et bandes magntiques laide de lessai sur tle unique Magnetische Werkstoffe - Verfahren zur Messung der magnetischen Eigenschaften von Elektroblech und -band mit Hilfe eines Tafelmegertes This European Standard was approved by CEN on 6 December 2000 and includes Amendmen

8、t 1 approved by CEN on 2 December 2006. CEN 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 such

9、 national standards may be obtained on application to the CEN Management Centre or to any CEN 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 CEN member into its own language

10、 and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem

11、bourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All ri

12、ghts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10280:2001+A1:2007: EEN 10280:2001+A1:2007 (E) 2 Contents Foreword3 1 Scope 4 2 Normative references 4 3 General principles5 3.1 Principle5 3.2 Test apparatus .5 3.3 Air flux compensation .6 3.

13、4 Test specimen6 3.5 Power supply7 4 Determination of the specific total loss.7 4.1 Principle of measurement.7 4.2 Apparatus .7 4.3 Measuring procedure 7 5 Determination of magnetic field strength, excitation current and specific apparent power .9 5.1 Principle of measurement.9 5.2 Apparatus .10 5.3

14、 Measuring procedure 10 5.4 Determination of characteristics11 5.5 Reproducibility.13 Annex A (normative) Requirements concerning the manufacture of yokes.17 Annex B (informative) Calibration of the test apparatus with respect to the Epstein frame.18 !Annex C (informative) Epstein to SST relationshi

15、p for grain-oriented sheet steel“19 Bibliography 23 BS EN 10280:2001+A1:2007EN 10280:2001+A1:2007 (E) 3 Foreword This document (EN 10280:2001+A1:2007) has been prepared by Technical Committee ECISS/TC 24 “Electrical steel sheet and strip qualities - Qualities, dimensions, tolerances and specific tes

16、ts“, the secretariat of which is held by DIN. This document shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2007, and conflicting national standards shall be withdrawn at the latest by July 2007. This document incl

17、udes Amendment 1, approved by CEN on 2006-12-02. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! “. This document is based on IEC 60404-3 !:1992 including its Amendment 1:2002.“ According to the CEN/CENELEC Internal Regulations, the national standar

18、ds organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Port

19、ugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 10280:2001+A1:2007EN 10280:2001+A1:2007 (E) 4 1 Scope This European Standard defines the general principles of the measurement of the magnetic properties of electrical sheets and strips by means of a single sheet

20、 tester and gives the technical details of the measurement of specific total loss and of magnetic field strength, excitation current and specific apparent power. This European Standard is applicable at power frequencies to : a) grain oriented magnetic sheet and strip : for the measurement between 1,

21、0 T and 1,8 T of : specific total loss ; specific apparent power ; r.m.s. value of the magnetic field strength ; for the measurement up to peak values of magnetic field strength of 1 000 A/m of : peak value of the magnetic polarization ; peak value of the magnetic field strength ; b) non-oriented ma

22、gnetic sheet and strip : for the measurement between 0,8 T and 1,5 T of : specific total loss ; specific apparent power ; r.m.s. value of excitation current ; for the measurement up to peak values of magnetic field strength of 10 000 A/m of : peak value of the magnetic polarization ; peak value of t

23、he magnetic field strength. The single sheet tester is applicable to test specimens obtained from electrical sheets and strips of any quality. The magnetic characteristics are determined for a sinusoidal induced voltage, for specified peak values of magnetic polarization and for a specified frequenc

24、y. The measurements are made at an ambient temperature of 23 C 5 C on test specimens which have first been demagnetized. NOTE Throughout this European Standard the quantity “magnetic polarization“ is used as defined in!IEC 60050-221“. 2 Normative references This European Standard incorporates by dat

25、ed or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard

26、only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). IEC 60404-13, Magnetic materials - Part 13 : Methods of measurement of density, resistivity and stacking factor of electrical steel sheet an

27、d strip. BS EN 10280:2001+A1:2007EN 10280:2001+A1:2007 (E) 5 3 General principles 3.1 Principle The test specimen comprises a sample of magnetic sheet and is placed inside two windings : an exterior primary winding (magnetizing winding) ; an interior secondary winding (voltage winding). The flux clo

28、sure is made by a magnetic circuit consisting of two identical yokes, the cross-section of which is very large compared with that of the test specimen (see figure 1). To minimize the effects of pressure on the test specimen, the upper yoke shall be provided with a means of suspension which allows pa

29、rt of its weight to be counterbalanced in accordance with 3.2.1. Care shall be taken to ensure that temperature variations are kept below a level likely to produce stress in the test specimen due to thermal expansion or contraction. 3.2 Test apparatus 3.2.1 Yokes Each yoke is in the form of a U made

30、 of insulated sheets of grain oriented silicon steel or nickel iron alloy. It shall have a low reluctance and a specific total loss not greater than 1,0 W/kg at 1,5 T and 50 Hz. It shall be manufactured in accordance with the requirements of annex A. In order to reduce the effect of eddy currents an

31、d to give a more homogeneous distribution of the flux over the inside of yokes, the latter shall be made of a pair of C-cores or a glued stack of laminations in which case the corners shall have staggered butt joints (see Figure 1). The yoke shall have pole faces having a width of 25 mm 1 mm. The tw

32、o pole faces of each yoke shall be coplanar to within 0,5 mm and the gap between the opposite pole faces of the yokes shall not exceed 0,005 mm at any point. Also, the yokes shall be rigid in order to avoid creating mechanical stresses in the test specimen. The height of each yoke shall be between 9

33、0 mm and 150 mm. Each yoke shall have a width of 50+mm500 mm and an inside length of 450 mm 1 mm (see Figure 2). NOTE It is recognized that other yoke dimensions can be used provided that the comparability of the results can be demonstrated. There shall be a non-conducting, non-magnetic support betw

34、een the vertical limbs of the yokes on which the test specimen is placed. This support shall be centred and located in the same plane as the pole faces so that the test specimen is in direct contact with the pole faces without any gap. The upper yoke shall be movable upwards to permit insertion of t

35、he test specimen. After insertion the upper yoke shall be realigned accurately with the bottom yoke. The suspension of the upper yoke shall allow part of its weight to be counterbalanced so as to give a force on the test specimen of between 100 N and 200 N. NOTE The square shape of the yoke has been

36、 chosen in order to have only one test specimen for non-oriented material. By rotating the test specimen through 90 it is possible to determine the characteristics in the rolling direction and perpendicular to the rolling direction. BS EN 10280:2001+A1:2007EN 10280:2001+A1:2007 (E) 6 3.2.2 Windings

37、The primary and secondary windings shall be at least 440 mm in length and shall be wound on a non-conducting, non-magnetic, rectangular former. The dimensions of the former shall be as follows : length : 445 mm 2 mm ; internal width : 510 mm 1 mm ; internal height : 520mmmm ; height : 15 mm. The pri

38、mary winding can be made up of : either five or more coils having identical dimensions and the same number of turns connected in parallel and taking up the whole length (see figure 3). For example, with five coils, each coil can be made up of 400 turns of copper wire 1 mm in diameter, wound in five

39、layers ; or a single continuous and uniform winding taking up the whole length. For example this winding can be made up of 400 turns of copper wire 1 mm in diameter, wound in one or more layers. The number of turns on the secondary winding will depend on the characteristics of the measuring instrume

40、nts. 3.3 Air flux compensation Compensation shall be made for the effect of air flux. This can be achieved, for example, by a mutual inductor. The primary winding of the mutual inductor is connected in series with the primary winding of the test apparatus, while the secondary winding of the mutual i

41、nductor is connected to the secondary winding of the test apparatus in series opposition. The adjustment of the value of the mutual inductance shall be made so that, when passing an alternating current through the primary windings in the absence of the specimen in the apparatus, the voltage measured

42、 between the non-common terminals of the secondary winding shall be no more than 0,1 % of the voltage appearing across the secondary winding of the test apparatus alone. Thus the average value of the rectified voltage induced in the combined secondary windings is proportional to the peak value of th

43、e magnetic polarization in the test specimen. 3.4 Test specimen The length of the test specimen shall be not less than 500 mm. Although the part of the specimen situated outside the pole faces has no great influence on the measurement, this part shall be not longer than it is necessary to facilitate

44、 insertion and removal of the test specimen. The width of the test specimen shall be as large as possible and at its maximum equal to the width of the yokes. For maximum accuracy, the minimum width shall be not less than 60 % of the width of the yokes. The test specimens shall be cut without the for

45、mation of excessive burrs or mechanical distortion. The test specimen shall be plane. When a test specimen is cut, the edge of the parent strip is taken as the reference direction. The following tolerances are allowed for the angle between the direction of rolling and that of cutting : 1 for grain o

46、riented steel sheet ; 5 for non-oriented steel sheet. For non-oriented steel sheet, two specimens shall be cut, one parallel to the direction of rolling and the other perpendicular unless the test specimen is square, in which case one test specimen only is necessary. BS EN 10280:2001+A1:2007EN 10280

47、:2001+A1:2007 (E) 7 3.5 Power supply The power supply shall be of low internal impedance and shall be highly stable in terms of voltage and frequency. During the measurement, the voltage and the frequency shall be maintained constant within 0,2 %. In addition, the waveform of the secondary induced v

48、oltage shall be maintained as sinusoidal as possible. It is preferable to maintain the form factor of the secondary voltage to within 1 % of 1,111. This can be achieved by various means, for example by using an electronic feedback amplifier. 4 Determination of the specific total loss 4.1 Principle o

49、f measurement The single sheet tester with the test specimen represents an unloaded transformer the total loss of which is measured by the circuit shown in figure 4. 4.2 Apparatus 4.2.1 Voltage measurement 4.2.1.1 Average type voltmeter The secondary rectified voltage of the test apparatus shall be measured by an average type voltmeter. The preferred instrument is a digital voltmeter having an accuracy of 0,2 %. NOTE Instruments of this type are usually graduated in average rectified value mul