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1、BRITISH STANDARD BS EN 10280:2001 Magnetic materials Methods of measurement of the magnetic properties of electrical sheet and strip by means of a single sheet tester The European Standard EN 10280:2001 has the status of a British Standard ICS 29.030 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMI
2、TTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 03:58:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 10280:2001 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Co
3、mmittee and comes into effect on 15 April 2001 BSI 04-2001 ISBN 0 580 36998 6 National foreword This British Standard is the official English language version of EN 10280:2001. It supersedes BS 6404-3:1992 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committ
4、ee ISE/NFE/5, Magnetic alloys and steels, to Subcommittee ISE/NFE/5/2, Tests for magnetic alloys, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement internationa
5、l or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all
6、 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 from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enq
7、uiries 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. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 19 and a back
8、 cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 03:58:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENN
9、E EUROPISCHE NORM EN 10280 February 2001 ICS 29.030 English 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 caractristiques magntiques des tles et bandes magntiques
10、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. CEN members are bound to comply with the CEN/CENELEC Internal Regulations
11、 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 Management Centre or to any CEN member. This European S
12、tandard 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 and notified to the Management Centre has the same status as the official versions. CEN members are the national sta
13、ndards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE F
14、R NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10280:2001 E Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 03:58:46 GMT+00:00 2006, Uncontrolled Copy, (c
15、) BSI Page 2 EN 10280:2001 BSI 04-2001 Contents Foreword 3 1Scope 4 2Normative references 4 3General principles 5 3.1Principle 5 3.2Test apparatus 5 3.3Air flux compensation 6 3.4Test specimen 6 3.5Power supply 7 4Determination of the specific total loss 7 4.1Principle of measurement 7 4.2Apparatus
16、7 4.3Measuring procedure 8 5Determination of magnetic field strength, excitation current and specific apparent power 9 5.1Principle of measurement 10 5.2Apparatus 10 5.3Measuring procedure 11 5.4Determination of characteristics 11 5.5Reproducibility 13 Annex A (normative) Requirements concerning the
17、 manufacture of yokes 17 Annex B (informative) Calibration of the test apparatus with respect to the Epstein frame 18 Bibliography 19 Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 03:58:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 10280:2001 BSI 04-2001 Foreword This European Sta
18、ndard 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 is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an i
19、dentical text or by endorsement, at the latest by August 2001, and conflicting national standards shall be withdrawn at the latest by August 2001. This document is based on IEC 60404-3. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries
20、 are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 0
21、3:58:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 10280:2001 BSI 04-2001 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 tester and gives the technical details of the mea
22、surement 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 1,0 T and 1,8 T of: ? specific total loss; ? specifi
23、c 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 magnetic sheet and strip: ? for the measurement
24、 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 the magnetic field strength. The single
25、 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 frequency. The measurements are made at an amb
26、ient temperature of 23 C 5 C on test specimens which have first been demagnetized. NOTEThroughout this European Standard the quantity “magnetic polarization” is used as defined in IEC 60050(221). 2 Normative references This European Standard incorporates by dated or undated reference, provisions fro
27、m 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 only when incorporated in it by amendme
28、nt 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 and strip. Licensed Copy: sheffieldun sheffi
29、eldun, na, Thu Oct 26 03:58:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 10280:2001 BSI 04-2001 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 secon
30、dary winding (voltage winding). The flux closure 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 provide
31、d with a means of suspension that allows part 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
32、 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 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 ord
33、er 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 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
34、 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 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.
35、 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 (see Figure 2). NOTEIt is recognized that other yoke dimensions can be used provided that the comparability of the results can be demonstrated. There shall b
36、e a non-conducting, non-magnetic support between 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 shal
37、l be movable upwards to permit insertion of the 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
38、N. NOTEThe square shape of the yoke has been 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. Licensed Copy: sheffiel
39、dun sheffieldun, na, Thu Oct 26 03:58:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 EN 10280:2001 BSI 04-2001 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 fo
40、rmer shall be as follows: ? length:445 mm 2 mm ; ? internal width:510 mm 1 mm ; ? internal height: 5 2 0 mm ? mm ; ? height:? 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 who
41、le 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 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 di
42、ameter, wound in one or more layers. The number of turns on the secondary winding will depend on the characteristics of the 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 win
43、ding of the mutual inductor is connected in series with the primary winding of the test apparatus, while the secondary winding 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 s
44、o that, when passing an alternating current through the primary windings in the absence of the specimen in the apparatus, 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 appar
45、atus alone. Thus the average value of the rectified voltage induced in the combined secondary windings is proportional to 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 necessary 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
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