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1、BRITISH STANDARD BS EN 10280:2001 +A1:2007 Magnetic materials Methods of measurement of the magnetic properties of electrical sheet and strip by means of a single sheet tester ICS 29.030 ? Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:16, Uncontrolled Copy, (c) BS
2、I BS EN 10280:2001+A1:2007 of the Standards Committee and comes into effect on 15 April 2001 BSI 2008 ISBN 978 0 580 64204 3 National foreword This British Standard is the UK implementation of EN 10280:2001+A1:2007. It supersedes BS EN 10280:2001 which is withdrawn. The start and finish of text intr
3、oduced 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 secretary. This publication does not purport to include all the necessary provi
4、sions 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 publication DateComments Implementation of CEN amendment A1:2007 The UK participation in its preparation was en
5、trusted to Technical Committee A list of organizations represented on this committee can be obtained on ISE/NFE/5, Magnetic alloys and steels. 30 November 2008 published under the authority This British Standard was Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:16
6、, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10280:2001+A1 January 2007 ICS 29.030 Supersedes EN 10280:2001 English Version Magnetic materials - Methods of measurement of the magnetic properties of electrical sheet and strip by means of a single sheet tester Matr
7、iaux magntiques - Mthodes de mesure des caractristiques 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 b
8、y CEN on 6 December 2000 and includes Amendment 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
9、and bibliographical references concerning such 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 respon
10、sibility of a CEN member into its own language 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, Ice
11、land, Ireland, Italy, Latvia, Lithuania, Luxembourg, 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 d
12、e Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10280:2001+A1:2007: E Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:16, Uncontrolled Copy, (c) BSI EN 10280:200
13、1+A1:2007 (E) 2 Contents Foreword3 1 Scope 4 2 Normative references4 3 General principles5 3.1 Principle5 3.2 Test apparatus .5 3.3 Air flux compensation.6 3.4 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
14、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 Measuring procedure 10 5.4 Determination of characteristics11 5.5 Reproducibility.13 Annex A (normative) Requirements concerning the manufactu
15、re of yokes.17 Annex B (informative) Calibration of the test apparatus with respect to the Epstein frame.18 !Annex C (informative) Epstein to SST relationship for grain-oriented sheet steel“ 19 Bibliography23 BS EN 10280:2001+A1:2007 Licensed Copy: London South Bank University, South Bank University
16、, 31/01/2009 03:16, Uncontrolled Copy, (c) BSI EN 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 tests“, the secretariat of which
17、 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 includes Amendment 1, approved by
18、 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 standards organizations of the follo
19、wing 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, Portugal, Romania, Slovakia, Slov
20、enia, Spain, Sweden, Switzerland and United Kingdom. BS EN 10280:2001+A1:2007 Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:16, Uncontrolled Copy, (c) BSI EN 10280:2001+A1:2007 (E) 4 1 Scope This European Standard defines the general principles of the measurement
21、of the magnetic properties of electrical sheets and strips by means of a single sheet 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 frequen
22、cies to : a) grain oriented magnetic sheet and strip : for the measurement between 1,0 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 m
23、agnetic polarization ; peak value of the magnetic field strength ; b) non-oriented magnetic 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
24、strength of 10 000 A/m of : peak value of the magnetic polarization ; peak value of the 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 vol
25、tage, for specified peak values of magnetic polarization and for a specified frequency. 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
26、 in!IEC 60050-221“. 2 Normative references This European Standard incorporates by dated 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 ame
27、ndments to or revisions of any of these publications apply to this European Standard 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
28、 measurement of density, resistivity and stacking factor of electrical steel sheet and strip. BS EN 10280:2001+A1:2007 Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:16, Uncontrolled Copy, (c) BSI EN 10280:2001+A1:2007 (E) 5 3 General principles 3.1 Principle The t
29、est 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 closure is made by a magnetic circuit consisting of two identical yokes, the cross-section of which is v
30、ery 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 part of its weight to be counterbalanced in accordance with 3.2.1. Care shall be taken to ensure that t
31、emperature 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 of insulated sheets of grain oriented silicon steel or nickel iron alloy. It shall have a low reluct
32、ance 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 and to give a more homogeneous distribution of the flux over the inside of yokes, the latter shall be m
33、ade 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 two pole faces of each yoke shall be coplanar to within 0,5 mm and the gap between the opposite pole fa
34、ces 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 90 mm and 150 mm. Each yoke shall have a width of 5 0 + mm500 mm and an inside length of 450 mm 1 mm (
35、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 between the vertical limbs of the yokes on which the test specimen is placed. This support shall be ce
36、ntred 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 the test specimen. After insertion the upper yoke shall be realigned accurately with the bottom yok
37、e. 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 chosen in order to have only one test specimen for non-oriented material. By rotating the test sp
38、ecimen through 90 it is possible to determine the characteristics in the rolling direction and perpendicular to the rolling direction. BS EN 10280:2001+A1:2007 Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:16, Uncontrolled Copy, (c) BSI EN 10280:2001+A1:2007 (E) 6
39、 3.2.2 Windings 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 : 5 2 0 mm mm ; hei
40、ght : 15 mm. The primary 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 diam
41、eter, wound in five 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 th
42、e measuring instruments. 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 win
43、ding of the mutual inductor 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,
44、the voltage measured 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
45、the peak value of the 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 nec
46、essary to facilitate 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
47、 cut without the formation 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 cut
48、ting : 1 for grain oriented 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:
49、2001+A1:2007 Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:16, Uncontrolled Copy, (c) BSI EN 10280:2001+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 secondar