IEC 62044-2:2005

FOREWORD
1 Scope and object
2 Normative references
3 Definitions
4 Symbols
5 Environmental conditions
6 General precautions for methods involving permeability
   measurements
   6.1 Parameters involved
   6.2 Mounting of cores consisting of more than one part
7 General precautions for loss measurement at low flux density
   7.1 Contributory losses
   7.2 Mounting
8 Magnetic conditioning
9 Inductance measurement
   9.1 General
   9.2 Determination of the test signal
   9.3 Determination of the test coil
   9.4 Considerations for core alignment during test
   9.5 Measurement of inductance under the influence of
       d.c. magnetic field
   9.6 Parameters related to core geometry
   9.7 Magnetic material parameters
10 Disaccommodation
11 Temperature coefficient of permeability
   11.1 Specimens
   11.2 Measuring procedure
12 Losses at low flux density
   12.1 Object
   12.2 Measuring coil
   12.3 Measurement of residual and eddy current loss
   12.4 Measurement of the hysteresis loss
13 Total harmonic distortion
   13.1 Specimen
   13.2 Measuring instrument and circuit
   13.3 Measuring procedure
   13.4 AL value and winding conditions for THDF measurement
   13.5 Material characteristics - THDF
14 Curie temperature
15 Normalized impedance, parallel conductivity, and insertion
   loss
   15.1 General
   15.2 Measuring procedure
   15.3 Normalized impedance
   15.4 Parallel conductivity
Annex A (informative) Disaccommodation
Annex B (informative) Measurement conditions for THD testing
Figures
Tables

Gives guidance for the drafting of those parts of specifications for magnetic cores that are concerned with measuring methods for magnetic and electric core properties. Applies to magnetic cores, mainly made of magnetic oxides or metallic powders, used at low excitation level in inductors and transformers for telecommunication equipment and electronic devices employing similar techniques.
The contents of the corrigendum of May 2021 have been included in this copy.