IEC TS 62764-1:2019

IEC TS 62764-1 ®
Edition 1.0 2019-09
TECHNICAL
SPECIFICATION
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
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IEC TS 62764-1 ®
Edition 1.0 2019-09
TECHNICAL
SPECIFICATION
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

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20 ISBN 978-2-8322-7248-0

– 2 – IEC TS 62764-1:2019 © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 8
4 Measurement procedure . 8
4.1 Measurement phases . 8
4.2 Measuring conditions . 8
4.3 Test site . 9
4.4 Vehicle set-up . 9
4.5 Measurement locations . 9
4.5.1 General . 9
4.5.2 Inside the vehicle . 9
4.5.3 Outside the vehicle . 10
5 Measurement technique . 11
5.1 Measuring equipment . 11
5.2 Measurement of the magnetic field exposure . 11
6 Measurement procedure . 11
6.1 Vehicle in stationary mode . 11
6.1.1 General . 11
6.1.2 Flowchart . 11
6.1.3 Phase 1: vehicle preparation . 12
6.1.4 Phase 2: vehicle set-up . 12
6.1.5 Phase 3: vehicle measurement . 12
6.2 Vehicle in driving mode . 13
6.2.1 General . 13
6.2.2 Flowchart . 13
6.2.3 Phase 1: vehicle preparation . 13
6.2.4 Phase 2: vehicle set-up . 13
6.2.5 Phase 3: vehicle measurement (at constant speed) . 13
6.2.6 Phase 4: optional measurements . 14
6.3 Vehicle in acceleration mode . 14
6.3.1 General . 14
6.3.2 Flowchart . 14
6.3.3 Phase 1: vehicle preparation . 14
6.3.4 Phase 2: vehicle set-up . 14
6.3.5 Phase 3: vehicle measurement (in acceleration) . 14
6.4 Vehicle in plug-in charging mode . 15
6.4.1 General . 15
6.4.2 Flowchart . 15
6.4.3 Phase 1: vehicle preparation . 15
6.4.4 Phase 2: vehicle set-up . 16
6.4.5 Phase 3: vehicle measurement . 16
7 Test report . 16

8 Assessment . 16
Annex A (informative) Practical measurement advice . 17
A.1 Motivation . 17
A.2 Measurement adaptor . 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
Bibliography . 20

Figure 1 – Example of test volumes taking account of all body parts for a left-hand
drive vehicle . 10
Figure 2 – Specific stationary mode set-up and test . 12
Figure 3 – Specific driving mode set-up and test . 13
Figure 4 – Specific acceleration mode set-up and test . 14
Figure 5 – Specific plug-in charging mode set-up and test . 15
Figure 6 – Plug-in charging supply cable positioning . 16
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

– 4 – IEC TS 62764-1:2019 © IEC 2019
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
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Technical Specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC TS 62764-1, which is a Technical Specification, has been prepared by IEC technical
committee 106: Methods for the assessment of electric, magnetic and electromagnetic fields
associated with human exposure.

The text of this Technical Specification is based on the following documents:
Draft TS Report on voting
106/477/DTS 106/493/RVDTS
Full information on the voting for the approval of this Technical Specification can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
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 publication will remain unchanged until the
maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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– 6 – IEC TS 62764-1:2019 © IEC 2019
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.

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.
The scope of this document establishes the measurement procedure for the evaluation of
magnetic field levels in the automotive environment, 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 to the applicable exposure requirements.
This document covers the frequency range 1 Hz to 400 kHz and is applicable to any type of
engine and/or internal energy source.
It is not the scope of this document to define procedures for wireless power transfer (WPT).
Human exposure due to WPT is covered by IEC 61980-1 [2].
Abnormal operation of the vehicle or equipment under test 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 61786-1:2013, 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)
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
____________
Numbers in square brackets refer to the Bibliography.

– 8 – IEC TS 62764-1:2019 © IEC 2019
3.1.1
applicable requirement
particular requirement regarding human exposure to low-frequency magnetic fields against
which the vehicle under test 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
magnetic field exposure
specific metric(s) that are used to quantify human exposure to low-frequency magnetic fields in
the applicable requirements
Note 1 to entry: Examples of such metrics can be found in [3] to [9].
3.1.3
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, including mild hybrid electric vehicle (MHEV)
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 acceleration mode;
4) vehicle in plug-in charging mode.
These four parts are described in detail in Clause 6.
4.2 Measuring conditions
The measurements cover only sources of persistent magnetic field exposure. Continuous
occurring sources, or repetitive transient sources such as fan, wipers are included. Transient
electrical functions of short duration activated occasionally by the driver, passengers or the
vehicle itself are not considered in this document, in particular the horn, the motorized mirror
and the door-lock motor.
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 to be performed around the
vehicle in dynamic mode).
The measurements are performed in the vehicle’s standard modes of operation, generating the
expected highest 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 with or without the vehicle under test,
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 driven 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 acceleration mode.
If an outdoor track is used, the grade of the portion used for the tests shall be in the range ±2 %.
NOTE
...