MAGNETIC MATERIALS - PART 14: METHODS OF MEASUREMENT OF THE MAGNETIC DIPOLE MOMENT OF A FERROMAGNETIC MATERIAL SPECIMEN BY THE WITHDRAWAL OR ROTATION METHOD
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 General principle of measurement
5 Test specimen
6 Detection coil
7 Magnetic flux integrator
8 Measurement of the magnetic dipole moment of magnetized
material
8.1 Correction of integrator readings for loading effects
with no integrator calibration
8.2 Circuit configuration for measurement when the
integrator is calibrated using a mutual inductor
8.3 Calibration of the measuring device for the magnetic
dipole moment by means of a calibrated permanent
magnet sample
8.4 Withdrawal method
8.5 Rotation method
9 Determination of the saturation value of the magnetic
dipole moment
10 Determination of the magnetic polarization J
11 Determination of the specific saturation magnetic
polarization Sigma[s]
12 Calibration of the measuring device for the saturation
value of the magnetic dipole moment
13 Uncertainty of measurement
14 Test report
Annex A (informative) Measurement of the specific saturation
magnetic polarization of test specimen longer than the
homogenous area of the Helmholtz coil
Annex B (informative) Measurement of ferromagnetic specimens
with high saturation magnetic field, e.g. a hardmetal
specimen with high cobalt content
Annex C (informative) Measurement of a test specimen with a
small mass, e.g. a hardmetal specimen of a cobalt
content less than 50 mg
Figures
Applies to all ferromagnetic materials. It is particularly aimed at the measurement of the magnetic dipole moment of permanent magnet (magnetically hard) materials and the measurement of the specific saturation magnetic polarization of cemented carbide materials having a ferromagnetic binder.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 68 |
