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BSI 23/30484005 DC 2023

BSI 23/30484005 DC 2023

$13.70

BS EN IEC 60404-18 Magnetic materials – Part 18: Permanent magnet (magnetically hard) materials – Methods of measurement of the magnetic properties in an open magnetic circuit using a superconducting magnet

Published By Publication Date Number of Pages
BSI 2023 33
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PDF Catalog

PDF Pages PDF Title
3 68_757_CD_CP
4 Draft%20Second%20CD_Open_circuit_measurement_method_Superconducting_VSM%20_202311_Clean%20tempNoteJSi
6 FOREWORD
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 General principle
4.1 Principle of the method
12 4.2 Superconducting magnet (SCM)
4.3 Magnetic field strength sensor (H sensor)
4.4 Magnetic dipole moment detection coil (M coil)
13 4.5 Specimen rod and moving device
4.6 Measuring devices and the data processing device
14 5 Test specimen
6 Preparation of measurement
6.1 Measurement of volume of the test specimen
6.2 Initial magnetization of the test specimen to saturation
15 7 Determination of magnetic polarization
7.1 Measurement of the magnetic dipole moment
7.1.1 SCM-VSM method
7.1.2 SCM-Extraction method
16 7.2 Determination of magnetic polarization
8 Measurement of magnetic field
9 Calibration of the magnetic dipole moment detection coil (M coil)
10 Determination of demagnetization curve
17 11 Demagnetizing field correction
11.1 General
11.2 Method A: Method using a demagnetizing factor determined by the shape of the test specimen only
18 11.3 Method B: Method using a demagnetizing factor determined by the shape and the magnetic susceptibility of the test specimen
11.4 Method C: Method using an inverse analysis considering the spatial distribution of the self-demagnetizing field strength in the test specimen
19 12 Determination of principal magnetic properties
12.1 Remanent magnetic polarization Jr
12.2 Maximum energy product (BH)max
12.3 Coercivity (HcJ and HcB)
13 Reproducibility of the measurements
14 Test report
21 Annex A (informative) Demagnetizing field correction
23 Annex B (informative) Details of the demagnetizing field correction
B.1 General
B.2 Symbols
24 B.3 Method using a demagnetizing factor determined by the shape and magnetic susceptibility of the test specimen (Method B)
26 B.4 Method using an inverse analysis considering the spatial distribution of the self-demagnetizing field strength in the test specimen (Method C)
29 Annex C (informative) VSM measurement of the test specimen at elevated temperatures
30 Annex D (informative) Effect of test specimen dimensions on the magnetic properties
31 Annex E (informative) Comparison of the magnetic properties measured with a superconducting VSM and a permeameter
33 Bibliography

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BSI 23/30484005 DC 2023
$13.70