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BS EN IEC 60404-3:2022 2023

BS EN IEC 60404-3:2022 2023

$167.15

Magnetic materials – Methods of measurement of the magnetic properties of electrical steel strip and sheet by means of a single sheet tester

Published By Publication Date Number of Pages
BSI 2023 40
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IEC 60404-3:2022 is available as IEC 60404-3:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60404-3:2022 is applicable to grain-oriented and non-oriented electrical steel strip and sheet for measurement of AC magnetic properties at power frequencies. The object of this document is to define the general principles and the technical details of the measurement of the magnetic properties of electrical steel strip and sheet by means of a single sheet tester (SST). This edition includes the following significant technical changes with respect to the previous edition: – Annex A was revised. The method of determining the yokes’ lamination resistance was added to Annex A; – Annex B of the consolidated version of 2010 referred to calibration of the SST using the Epstein method. It was cancelled; – Annex B (new), Annex C and Annex D were revised, they are for information only; – Annex C was modified taking account of the new situation regarding P and R grades; – Annex D was amended by addition of Clause D.4 on the numerical air flux compensation.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
9 English
CONTENTS
11 FOREWORD
13 1 Scope
2 Normative references
3 Terms and definitions
14 4 General principles of AC measurements
4.1 General
4.2 Principle of the single sheet tester method
4.3 Test apparatus
4.3.1 Yokes
15 Figures
Figure 1 – Schematic diagrammes of the test apparatus
16 4.3.2 Windings
Figure 2 – Yoke dimensions
Figure 3 – Diagram of the connections of the five coils of the primary winding
17 4.4 Air flux compensation
4.5 Test specimen
Figure 4 – Circuit for the determination of the specific total loss
18 4.6 Power supply
5 Determination of the specific total loss
5.1 Principle of measurement
5.2 Apparatus
5.2.1 Voltage measurement
19 5.2.2 Frequency measurement
5.2.3 Power measurement
5.3 Measurement procedure of the specific total loss
5.3.1 Preparation of measurement
5.3.2 Adjustment of power supply
20 5.3.3 Measurements
21 5.3.4 Reproducibility of the measurement of the specific total loss
6 Determination of magnetic field strength, primary currentand specific apparent power
6.1 General
6.2 Principle of measurement
6.2.1 Peak value of the magnetic polarization
6.2.2 RMS value of the primary current
22 6.2.3 Peak value of the magnetic field strength
6.3 Apparatus
6.3.1 Average type voltmeter
Figure 5 – Circuit for measuring the RMS value of the primary current
Figure 6 – Circuit for measuring the peak value of the magnetic field strength
23 6.3.2 RMS current measurement
6.3.3 Peak current measurement
6.3.4 Power supply
6.3.5 Resistor R
6.4 Measuring procedure
6.4.1 Preparation for measurement
6.4.2 Measurement
24 6.4.3 Non-oriented material
6.5 Determination of characteristics
6.5.1 Determination of Ĵ
6.5.2 Determination of
25 6.5.3 Determination of
6.5.4 Determination of Ss
26 6.5.5 Reproducibility of the measurement of the specific apparent power
7 Test report
27 Annexes
Annex A (normative) Requirements concerning the manufacture of yokes
29 Annex B (informative) Check and verification of reliable performance of the SST set-up by the use of reference samples and impact of the loss dissipated in the yokes
30 Figure B.1 – Specific total loss vs. peak flux density (after J. Sievert [3] and G. Bertotti [4]); straight line: PS ∝ B1.85 approximation (after C. Ragusa).
31 Tables
Table B.1 – Loss dissipated by the yokes of a standard SST, determined from the loss curves measured on 3 yoke pairs as shown in Figure B.1, and relevant quantities including the relative yokes’ contribution, pY; exemplified using 5 standard grades
32 Annex C (informative) Epstein to SST relationship for grain-oriented steel sheet
33 Table C.1 – SST-Epstein relative differences δP and δHS and the conversion factor FC for conventional grain-oriented material in the polarization range 1,0 T to 1,8 T
34 Figure C.1 – SST-Epstein relative difference δP for conventional grain-oriented material versus magnetic polarization Ĵ
Figure C.2 – SST-Epstein relative difference δHS for conventional grain-oriented material versus magnetic polarization Ĵ
35 Annex D (informative) Digital sampling methods for the determination of the magnetic properties and numerical air flux compensation
D.1 General
D.2 Technical details and requirements
37 D.3 Calibration aspects
D.4 Numerical air flux compensation
39 Bibliography

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BS EN IEC 60404-3:2022 2023
$167.15