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GB/T 13789-2022 English PDF

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GB/T 13789-2022: Methods of measurement of the magnetic properties of electrical steel strip and sheet by means of a single sheet tester
Status: Valid

GB/T 13789: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 13789-2022English739 Add to Cart 6 days [Need to translate] Methods of measurement of the magnetic properties of electrical steel strip and sheet by means of a single sheet tester Valid GB/T 13789-2022
GB/T 13789-2008English799 Add to Cart 4 days [Need to translate] Methods of measurement of the magnetic properties of magnetic sheet and strip by means of a single sheet tester Obsolete GB/T 13789-2008
GB/T 13789-1992English479 Add to Cart 4 days [Need to translate] Magnetic sheet and strip. Methods of measurement of magnetic properties by means of a single sheet tester Obsolete GB/T 13789-1992

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Basic data

Standard ID GB/T 13789-2022 (GB/T13789-2022)
Description (Translated English) Methods of measurement of the magnetic properties of electrical steel strip and sheet by means of a single sheet tester
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H21
Classification of International Standard 17.220.20.29.030
Word Count Estimation 35,322
Date of Issue 2022-10-12
Date of Implementation 2022-10-12
Older Standard (superseded by this standard) GB/T 13789-2008
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 13789-2022: Methods of measurement of the magnetic properties of electrical steel strip and sheet by means of a single sheet tester


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Methods of measurement of the magnetic properties of electrical steel strip and sheet by means of a single sheet tester ICS 17.220.20.29.030 National Standards of People's Republic of China Replacing GB/T 13789-2008 Measuring electrical steel strips (sheets) with a single sheet tester method of magnetic properties (IEC 60404-3.1992, Magneticmaterials-Part 3.Methodsof 2022-10-12 release 2022-10-12 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 Method A (current method) 2 4.1 Overview 2 4.2 Permeameter 3 4.3 Air flux compensation 4 4.4 Sample 4 4.5 Power 4 4.6 Determination of specific total loss 4 4.7 Determination of magnetic field strength, excitation current and specific apparent power 7 5 Method B (Field Coil Method) 11 5.1 Principle 11 5.2 Determination of specific total loss 13 5.3 Determination of magnetic polarization, magnetic field strength and specific apparent power 15 6 Test report 16 Appendix A (informative) This document and IEC 60404-3.1992 structure number comparison list 17 Appendix B (informative) Technical differences between this document and IEC 60404-3.1992 and their reasons 18 Appendix C (Normative) Technical Requirements for Yoke Manufacturing 19 Appendix D (informative) The relationship between the Epstein square method and the monolithic method (method A current method) of grain-oriented electrical steel 20 Appendix E (informative) Determination of magnetic properties by digital sampling method 22 Appendix F (informative) Validation and Calibration Scheme for Magnetic Measuring Equipment 25 Appendix G (informative) Digital method for controlling the sine wave of magnetic polarization intensity 30 Reference 31

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document replaces GB/T 13789-2008 "Method for Measuring Magnetic Properties of Electrical Steel Sheets (Strips) with Single Chip Tester", and GB/T 13789- Compared with.2008, except for structural adjustment and editorial changes, the main technical changes are as follows. a) Changed Figure 1 and added a schematic diagram of a C-shaped yoke (see Figure 1, Figure 1 of the.2008 edition); b) Method A (current method) has been changed (see Chapter 4, Chapter 4 and Chapter 5 of the.2008 edition); c) Changed the reproducibility requirements for peak magnetic polarization and magnetic field intensity (see 4.7.6, 5.3 of the.2008 edition); d) Add method B (magnetic field coil method) (see Chapter 5); e) Increase the selection of methods in the test report (see Chapter 6); f) Some requirements for the manufacture of the yoke have been changed, and the typical value of the proportion of the yoke loss to the total loss of the sample has been added (see Appendix C, Appendix A of the.2008 edition). This document is modified to adopt IEC 60404-3.1992 "Magnetic materials Part 3.Measuring the magnetic properties of electrical steel strip (sheet) by single-chip tester Methods". Compared with IEC 60404-3.1992, this document has more structural adjustments. Comparison overview of structure number changes between two files See Appendix A for the table. Compared with IEC 60404-3.1992, this document has many technical differences, and vertical Straight line (|) is marked. See Appendix B for a list of these technical differences and their causes. The following editorial changes have been made to this document. --- In order to coordinate with the current standard, change the name of the standard to "Method for Measuring Magnetic Properties of Electrical Steel Strip (Sheet) with Single Chip Tester"; ---Incorporated the content of IEC 60404-3.1992/AMD.1.2002 AMD.2.2009 and COR.1.2009, in the involved The position of the outer margin of the clause is marked with a vertical double line (‖); ---Replace the international documents for informative references with Chinese standards; --- Due to the addition of method B, the current method is changed to method A; --- Modify and add the notes in 4.6 and 6.3.3; --- Deleted the calibration of the single-chip method relative to the Epstein method in Appendix B (informative) of IEC 60404-3.1992; --- Adjust Appendix C (informative) of IEC 60404-3.1992 to Appendix D; --- Adjusted Appendix D (informative) of IEC 60404-3.1992 to Appendix E, and added peak magnetic field strength and specific apparent power The calculation formula; --- Increased the confirmation and calibration scheme of Appendix F (informative) magnetic measuring equipment; --- Added Appendix G (informative) digital method to control the sine of the magnetic polarization waveform. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Iron and Steel Industry Association. This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This document is drafted by. Baoshan Iron and Steel Co., Ltd., Changsha Tianheng Measurement and Control Technology Co., Ltd., Metallurgical Industry Information Standard Research Institute, Shougang Zhixin Qian'an Electromagnetic Materials Co., Ltd., Hunan Institute of Metrology and Testing, Global Energy Internet Research Institute Co., Ltd., Chongqing Wangbian Electric (Group) Co., Ltd. The main drafters of this document. Shen Jie, Zhou Xinhua, Wang Yujie, Hu Zhiyuan, Tang Ling, Ma Guang, Xu Yu, Liu Baoshi, Zou Hong, Zhou Xing, Li Xiuzhang, Liu Zhaoyue, Cheng Ling, Xiangqian, Liu Qi. This document was first released in.1992, revised for the first time in.2008, and this is the second revision. Measuring electrical steel strips (sheets) with a single sheet tester method of magnetic properties

1 Scope

This document specifies the general rules and technical details for measuring the magnetic properties of electrical steel strip (sheet) with a single-chip tester, including methods A (current method) and Method B (Field Coil Method). This document is applicable to. a) Grain oriented electrical steel strip (sheet) 1) Measured at the peak of 1.0T~1.8T magnetic polarization. --- Specific total loss; --- Specific apparent power; --- Effective value of magnetic field strength. 2) Measured at the peak value of the magnetic field strength not higher than 1000A/m. --- The peak value of the magnetic polarization; --- The peak value of the magnetic field strength. b) Grain-free oriented electrical steel strip (sheet) 1) Measured at the peak of the magnetic polarization of 0.8T~1.5T. --- Specific total loss; --- Specific apparent power; --- RMS value of excitation current. 2) Measured at the peak value of the magnetic field strength not higher than 10000A/m. --- The peak value of the magnetic polarization; --- The peak value of the magnetic field strength. The single-chip tester specified in this document is suitable for measuring samples made of various types of electrical steel strips (sheets), and is suitable for use in specified magnetic polarization. Magnetic properties were measured in a state where the intensity peak value, frequency, and induced voltage were sinusoidal waveforms. The measurement is carried out at an ambient temperature of 23°C±5°C, and the sample should be demagnetized before the test. Note 1.The "magnetic polarization" used in this document is defined in GB/T 9637.In some standards related to electrical steel, there is a use of "magnetic flux density" and the case of "magnetic induction". Under normal measurement conditions, the difference in magnitude between the above-mentioned differently defined physical quantities can be ignored. Note 2.The magnetic field strength measurement of method A (current method) is based on the conventional magnetic path length, and the measurement is relative; the magnetic field strength measurement of method B (magnetic field coil method) is Direct; there is a certain difference in the results measured by the two methods.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 9637 Electrotechnical terms Magnetic materials and components [GB/T 9637-2001, eqvIEC 60050(221).1990] GB/T 19289 Measurement method for electrical resistivity, density and packing coefficient of electrical steel strip (sheet) (GB/T 19289-2019, IEC 60404-13.2018, IDT)

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