IEC PAS 63184:2021

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)

IEC PAS 63184:2021 specifies the assessment methods to evaluate compliance of stationary and dynamic wireless power transfer (WPT) systems with electromagnetic human exposure guidelines (external electric and magnetic fields, specific absorption rate (SAR), internal electric fields or current density including contact currents). The frequency range of this document is from 1 kHz to 30 MHz.

General Information

• Status: Published
• Publication Date: 26-May-2021
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• Technical Committee: TC 106 - Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure

Standards Content (Sample)

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
...