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IEC PAS 63184
Edition 1.0 2021-05
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside
Assessment methods of the human exposure to electric and magnetic fields
from wireless power transfer systems – Models, instrumentation, measurement
and numerical methods and procedures (frequency range of 1 kHz to 30 MHz)
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IEC PAS 63184
Edition 1.0 2021-05
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside
Assessment methods of the human exposure to electric and magnetic fields
from wireless power transfer systems – Models, instrumentation, measurement
and numerical methods and procedures (frequency range of 1 kHz to 30 MHz)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20 ISBN 978-2-8322-9542-7
– 2 – IEC PAS 63184:2021 © IEC 2021
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 11
4 Symbols and abbreviated terms . 15
4.1 Physical quantities . 15
4.2 Constants . 15
4.3 Abbreviated terms . 15
5 Assessment procedures . 16
5.1 General . 16
5.2 Conformity assessment considering direct effects . 17
5.2.1 General . 17
5.2.2 Evaluation based on coil current . 17
5.2.3 Evaluation of incident fields against reference levels . 18
5.2.4 Evaluation of incident fields against basic restrictions . 18
5.2.5 Evaluation of internal E-field, current density and/or SAR against basic
restrictions . 22
5.3 Conformity assessment considering indirect effect . 22
6 Measurement methods . 24
6.1 Incident fields . 24
6.1.1 General procedure . 24
6.1.2 Equipment . 25
6.2 SAR . 26
6.3 Contact currents . 27
6.3.1 General . 27
6.3.2 Equipment . 28
6.3.3 Measurements . 29
7 Computational assessment methods . 30
7.1 General . 30
7.2 Quasi-static approximation . 30
7.3 Computational assessment against the basic restrictions . 31
7.3.1 General . 31
7.3.2 Peak spatial-average SAR . 31
7.3.3 Whole-body average SAR . 31
8 Combination of measurement and computational assessment methods . 32
8.1 General . 32
8.2 Measurement of magnetic field . 32
8.3 Computational analyses of induced quantities . 32
8.4 Computational assessment against the basic restrictions . 33
9 Uncertainty assessments . 33
9.1 Measurement methods . 33
9.2 Numerical methods . 34
9.3 Assessment of combining measurement and numerical methods . 35
Annex A (informative) Exposure evaluations using approximations . 37
Annex B (normative) Calibration methods . 39
B.1 General . 39
B.2 E-field and H-field calibration . 39
B.2.1 Standard field generation methods . 39
B.2.2 Characteristics to be measured . 39
B.2.3 Frequency domain calibration . 40
B.2.4 E-field calibration . 44
B.3 Gradient response verification . 48
B.3.1 General . 48
B.3.2 H-field gradient verification: Main steps . 48
B.3.3 Uncertainty for H-field gradient verification . 48
B.4 Dosimetric probe calibration . 49
B.4.1 General . 49
B.4.2 Calibration with short dipole antennas via transmit antenna factor . 49
B.4.3 Uncertainty . 52
Annex C (normative) Verification and validation methods for measurement . 53
C.1 General . 53
C.2 Objective . 53
C.3 Measurement setup and procedure for system verification and system
validation . 53
C.4 Measurement system verification: test procedure . 54
C.5 Measurement system validation: test procedure . 54
Annex D (informative) Dependency of SAR on phantom property and size . 55
D.1 Phantom property . 55
D.2 Phantom size . 58
Annex E (informative) Extrapolation methods of SAR measurement . 61
E.1 General . 61
E.2 Measurement and interpolation of electric field inside a phantom . 61
E.2.1 General . 61
E.2.2 Extrapolation functions . 61
E.2.3 Three steps for determination of spatial-peak SAR . 62
E.2.4 Validation of measurement methods using extrapolation . 62
E.2.5 Uncertainty . 64
Annex F (informative) Numerical calculation methods . 66
F.1 General . 66
F.2 Quasi-static finite element method . 66
F.3 Scalar potential finite difference method . 67
F.4 Impedance method . 67
F.5 Finite-difference time-domain method . 68
F.6 Hybrid technique of MoM and FDTD method . 68
F.7 Hybrid technique of FEM and SPFD method . 69
Annex G (informative) Averaging algorithms . 70
G.1 Current density averaging over an area . 70
G.1.1 General . 70
G.1.2 Calculation of the current density in a Cartesian voxel . 70
G.1.3 Calculation of the current density in a tetrahedron . 71
G.1.4 Calculation of J . 71
av
G.2 E-field averaging in a cubical volume . 72
G.3 E-field averaging along an averaging distance . 72
– 4 – IEC PAS 63184:2021 © IEC 2021
G.3.1 General . 72
G.3.2 Algorithm to construct the integration path . 73
Annex H (informative) Code verification and model validations . 74
H.1 Co
...