IEC 62764-1:2022

Measurement procedures of magnetic field levels generated by electronic and electrical equipment in the automotive environment with respect to human exposure - Part 1: Low-frequency magnetic fields

IEC 62764-1:2022 specifies a methodology for determining the exposure to multiple magnetic field sources for passenger cars and light commercial vehicles including standardized operating conditions and measurement volumes and/or surfaces. This part of IEC 62764 applies to the assessment of human exposure to low-frequency magnetic fields generated by automotive vehicles. For plug-in vehicles, this includes the electric vehicle supply equipment (EVSE) and associated cables provided by the car manufacturer. This excludes the charging station. This document specifies the measurement procedure for the evaluation of magnetic field exposures generated by electronic and electrical equipment (excluding intentionally transmitting radio frequency antennas) in selected automotive environments, for passenger cars and commercial vehicles of categories M1 and N1 as defined in ECE/TRANS/WP.29/78/Rev.3 [1], with respect to human exposure. It provides standardized operating conditions and defines recommended measurements to assess compliance with the applicable exposure requirements. This document covers the frequency range 1 Hz to 100 kHz and is applicable to any type of engine and/or internal energy source.
This first edition replaces IEC TS 62764-1, published in 2019.

Procédures de mesure de l'exposition humaine aux niveaux de champs magnétiques générés par les accessoires électroniques et électriques dans l'environnement automobile - Partie 1: Champs magnétiques à basse fréquence

L'IEC 62764-1:2022 spécifie une méthodologie pour déterminer l’exposition à plusieurs sources de champs magnétiques pour les voitures particulières et les véhicules utilitaires légers, y compris les conditions de fonctionnement normalisées et les volumes et/ou surfaces de mesure. La présente partie de l'IEC 62764 s’applique à l’évaluation de l’exposition humaine aux champs magnétiques à basse fréquence générés par les véhicules automobiles. Pour les véhicules rechargeables, cela inclut l’équipement d’alimentation des véhicules électriques (EVSE) et les câbles associés fournis par le constructeur automobile. Cela exclut la station de charge. Le présent document spécifie la procédure de mesure pour l’évaluation des expositions aux champs magnétiques générées par les équipements électroniques et électriques (à l’exclusion des antennes de radiofréquence émettant intentionnellement) dans certains environnements automobiles, pour les voitures particulières et les véhicules utilitaires des catégories M1 et N1 telles que définies dans la norme ECE/TRANS/WP.29/78/Rev.3 [1][1], en ce qui concerne l’exposition humaine. Il fournit des conditions de fonctionnement normalisées et définit les mesures recommandées pour évaluer la conformité aux exigences applicables en matière d’exposition. Le présent document couvre la gamme de fréquences de 1 Hz à 100 kHz et s’applique à tout type de moteur et/ou de source d’énergie interne.
Cette première édition annule l'IEC TS 62764-1, parue en 2019.

General Information

• Status: Published
• Publication Date: 14-Sep-2022
• 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
• Drafting Committee: PT 62764-1 - TC 106/PT 62764-1
• Current Stage: PPUB - Publication issued
• Start Date: 16-Sep-2022
• Completion Date: 15-Sep-2022

Relations

• Revises: IEC TS 62764-1:2019 - Measurement procedures of magnetic field levels generated by electronic and electrical equipment in the automotive environment with respect to human exposure - Part 1: Low frequency magnetic fields
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62764-1
®

Edition 1.0 2022-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Measurement procedures of magnetic field levels generated by electronic and
electrical equipment in the automotive environment with respect to human
exposure –
Part 1: Low-frequency magnetic fields

Procédures de mesure de l'exposition humaine aux niveaux de champs
magnétiques générés par les accessoires électroniques et électriques dans
l'environnement automobile –
Partie 1: Champs magnétiques à basse fréquence

IEC 62764-1:2022-09(en-fr)

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IEC 62764-1

®


Edition 1.0 2022-08




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Measurement procedures of magnetic field levels generated by electronic and

electrical equipment in the automotive environment with respect to human

exposure –


Part 1: Low-frequency magnetic fields



Procédures de mesure de l'exposition humaine aux niveaux de champs


magnétiques générés par les accessoires électroniques et électriques dans

l'environnement automobile –

Partie 1: Champs magnétiques à basse fréquence










INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 17.220.20 ISBN 978-2-8322-5607-7




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – IEC 62764-1:2022 © IEC 2022
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 9
4 Measurement procedure . 9
4.1 Measurement phases . 9
4.2 Measuring conditions . 10
4.3 Test site . 10
4.4 Vehicle set-up . 10
4.5 Measurement locations . 10
4.5.1 General . 10
4.5.2 Inside the vehicle . 11
4.5.3 Outside the vehicle . 12
5 Measurement technique . 12
5.1 Measuring equipment . 12
5.2 Measurement of the magnetic field exposure . 12
6 Measurement procedure . 12
6.1 Vehicle in stationary mode . 12
6.1.1 General . 12
6.1.2 Phase 1: vehicle preparation and set-up . 12
6.1.3 Phase 2: vehicle measurement . 13
6.2 Vehicle in driving mode . 13
6.2.1 General . 13
6.2.2 Phase 1: vehicle preparation and set-up . 13
6.2.3 Phase 2: vehicle measurement (at constant speed) . 13
6.2.4 Phase 3: additional measurements . 14
6.3 Vehicle in dynamic mode . 14
6.3.1 General . 14
6.3.2 Phase 1: vehicle preparation and set-up . 14
6.3.3 Phase 2: vehicle measurement . 14
6.4 Vehicle in plug-in charging mode . 15
6.4.1 General . 15
6.4.2 Phase 1: vehicle preparation and set-up . 15
6.4.3 Phase 2: vehicle measurement . 15
7 Assessment of measurement uncertainty . 16
8 Test report . 16
9 Exposure assessment . 16
Annex A (informative) Practical measurement advice . 17
Annex B (informative) Maximum extents of measurement volumes inside the vehicle . 18
B.1 Motivation . 18
B.2 Anthropometrical information . 18
B.3 Maximum extents of measurement volumes . 19

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IEC 62764-1:2022 © IEC 2022 – 3 –
Annex C (informative) Measurement errors due to source proximity and probe
orientation . 20
C.1 Background. 20
C.2 Magnitude of proximity and orientation related errors . 20
C.3 Dipole source contributions to uncertainty parameters . 22
Annex D (informative) Uncertainty estimation . 24
D.1 General . 24
D.2 Uncertainty budget . 24
Annex E (informative) Justification of measurement distances . 26
E.1 General . 26
E.2 Models and numerical methods . 26
E.2.1 Vehicle model and exposure scenarios . 26
E.2.2 Human model . 27
E.2.3 Computational method . 28
E.3 Computational results . 28
E.4 Conclusions . 32
Annex F (informative) Magnetic field levels during acceleration and deceleration . 33
F.1 Example results . 33
F.2 Test description . 33
F.3 Conclusion . 33
Bibliography . 35

Figure 1 – Example of test volumes taking account of all body parts for a left-hand
drive vehicle . 11
Figure 2 – Plug-in charging cable positioning . 15
Figure A.1 – Disc spacer around two types of measurement probes . 17
Figure A.2 – Hemispherical spacer around two types of measurement probes . 17
Figure B.1 – Summary of relevant anthropometrical data . 18
Figure C.1 – Span (error bars) and mode (O) of error distributions for magnetic dipole . 21
Figure C.2 – Span (error bars) and mode (O) of error distributions for linear current . 21
Figure C.3 – Comparison of predicted error distribution percentiles (O) and fitted
models (lines) as a function of s (distance/radius) . 23
Figure E.1 – Schematic explanation and geometry of the vehicle cabin . 27
Figure E.2 – Schematic diagram of electrical motor . 27
Figure E.3 – Definition of each part of the human body model . 28
Figure E.4 – Magnetic field distribution and measuring points . 29
Figure F.1 – Results obtained on a car with a full electric powertrain . 34
Figure F.2 – Results obtained on a car with a parallel hybrid electric powertrain . 34

Table C.1 – Summary of CDF percentile model fitting parameters for dipole source . 22
Table C.2 – CDF percentiles for dipole source at s = 3,545 . 23
Table D.1 – Uncertainty budget example of the evaluation of magnetic field exposures . 25
Table E.1 – Comparison of the ratio of magnetic field and ICNIRP 1998 reference
level, and current density and basic restriction for the wire cable . 30
Table E.2 – Comparison of the ratio of magnetic field and ICNIRP 1998 reference
level, and current density and basic restriction for the electrical motor . 30

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Table E.3 – Comparison of the ratio of magnetic field and ICNIRP 2010 reference
level, and internal electric field and basic restriction for the wire cable . 31
Table E.4 – Comparison of the ratio of magnetic field and ICNIRP 2010 reference
level, and internal electric field and basic restriction for the electrical motor. 31

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IEC 62764-1:2022 © IEC 2022 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

MEASUREMENT PROCEDURES OF MAGNETIC FIELD LEVELS
GENERATED BY ELECTRONIC AND ELECTRICAL EQUIPMENT IN THE
AUTOMOTIVE ENVIRONMENT WITH RESPECT TO HUMAN EXPOSURE –

Part 1: Low-frequency magnetic fields

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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IEC 62764-1 has been prepared by IEC technical committee 106: Methods for the assessment
of electric, magnetic and electromagnetic fields associated with human exposure. It is an
International Standard.
This first edition cancels and replaces IEC TS 62764-1 published in 2019.
The text of this International Standard is based on the following documents:
Draft Report on voting
106/575/FDIS 106/579/RVD

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.

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– 6 – IEC 62764-1:2022 © IEC 2022
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 62764 series, published under the general title Measurement
procedures of magnetic field levels generated by electronic and electrical equipment in the
automotive environment with respect to human exposure, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
 reconfirmed,
 withdrawn,
 replaced by a revised edition, or
 amended.

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IEC 62764-1:2022 © IEC 2022 – 7 –
INTRODUCTION
This document specifies a methodology for determining the exposure to multiple magnetic field
sources for passenger cars and light commercial vehicles including standardized operating
conditions and measurement volumes and/or surfaces.

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– 8 – IEC 62764-1:2022 © IEC 2022
MEASUREMENT PROCEDURES OF MAGNETIC FIELD LEVELS
GENERATED BY ELECTRONIC AND ELECTRICAL EQUIPMENT IN THE
AUTOMOTIVE ENVIRONMENT WITH RESPECT TO HUMAN EXPOSURE –

Part 1: Low-frequency magnetic fields



1 Scope
This part of IEC 62764 applies to the assessment of human exposure to low-frequency magnetic
fields generated by automotive vehicles. For plug-in vehicles, this includes the electric vehicle
supply equipment (EVSE) and associated cables provided by the car manufacturer. This
excludes the charging station.
This document specifies the measurement procedure for the evaluation of magnetic field
exposures generated by electronic and electrical equipment (excluding intentionally
transmitting radio frequency antennas) in selected automotive environments, for passenger
cars and commercial vehicles of categories M1 and N1 as defined in
1
ECE/TRANS/WP.29/78/Rev.3 [1] , with respect to human exposure. It provides standardized
operating conditions and defines recommended measurements to assess compliance with the
applicable exposure requirements.
This document covers the frequency range 1 Hz to 100 kHz and is applicable to any type of
engine and/or internal energy source.
This document does not include procedures for assessment of human exposure to
electromagnetic fields generated by wireless power transfer (WPT) equipment operating in
automotive environments. Exposure assessment procedures for WPT equipment are covered
by IEC PAS 63184 [2]. Magnetic field transients shorter than 200 ms occurring when electrical
functions are activated are not considered in this document.
Abnormal operation of the vehicle or its equipment is not taken into consideration.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61786-1, Measurement of DC magnetic, AC magnetic and AC electric fields from 1 Hz to
100 kHz with regard to exposure of human beings – Part 1: Requirements for measuring
instruments
IEC 62311:2019, Assessment of electronic and electrical equipment related to human exposure
restrictions for electromagnetic fields (0 Hz to 300 GHz)
____________
1
 Numbers in square brackets refer to the Bibliography.

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IEC 62764-1:2022 © IEC 2022 – 9 –
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
applicable requirement
particular requirement regarding human exposure to low-frequency magnetic fields against
which the vehicle is to be assessed using the methods outlined in this document
Note 1 to entry: Examples of such requirements can be found in [3] to [9].
3.1.2
dynamometer
device allowing a vehicle to rotate all its wheels with a given torque while stationary
3.1.3
magnetic field exposure
specific metric that is used to quantify human exposure to low-frequency magnetic fields in the
applicable requirement
Note 1 to entry: Examples of such metrics can be found in [3] to [9].
3.1.4
powertrain
main system that generates power and delivers it to the road surface
3.2 Abbreviated terms
EV electric vehicle
EVSE electric vehicle supply equipment
HEV hybrid electric vehicle
ICEV internal combustion engine vehicle
SOC state of charge (indicated to the driver)
WPT wireless power transfer
4 Measurement procedure
4.1 Measurement phases
The measurement procedure is divided into four parts regarding the operational vehicle use:
1) vehicle in stationary mode;
2) vehicle in driving mode;
3) vehicle in dynamic mode;
4) vehicle in plug-in charging mode.
These four parts are described in detail in Clause 6.

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4.2 Measuring conditions
The measurements cover only sources of persistent magnetic field exposure. Continuous
occurring sources, or repetitive transient sources such as fan and wipers, are included.
Magnetic field transients shorter than 200 ms occurring when electrical functions are activated
are not considered in this document due the difficulty of performing reliable and repeatable
measurements.
NOTE The rotation of the tyres can produce low-frequency magnetic fields (typically below 50 Hz, depending on
the speed of the vehicle) in and surrounding the vehicle, due to the static magnetization of the tyres [10], [11]. This
can only contribute to measurements inside the vehicle (since no measurements are performed around the vehicle
in dynamic mode).
The measurements shall be performed in the vehicle's standard modes of operation, generating
reasonably foreseeable levels of magnetic field exposure in measuring volumes that are
representative of the occupant (Annex B) and bystander locations.
4.3 Test site
Measurements shall be performed in an area having ambient magnetic field exposure values of
less than 10 % of the values given in the requirements in the measurement volumes.
The ambient magnetic field exposure shall be measured without the vehicle, but in conditions
that are representative of the vehicle test. This measurement can be performed before each
test or periodically in accordance with the laboratory's quality management processes.
A dynamometer (or roller bench) may be used if it rotates all the wheels of the vehicle. It shall
be set to simulate the outdoor dynamics of the vehicle including at least its steady-state torque
in driving mode and its inertial mass during dynamic mode.
If an outdoor track is used, the slope gradient of the section of the track used for the tests shall
be in the range ±2 %.
NOTE In the case of a dynamometer, the ambient magnetic field exposure can depend on the torque and/or speed
of the dynamometer.
4.4 Vehicle set-up
The following configuration is recommended within the passenger compartment, where
practicable:
– all seats except the rearmost seats, if adjustable, centre-positioned horizontally and at the
lowest position vertically;
– the rearmost seats, if horizontally adjustable, in their rearmost pos
...