IEC 61980-3:2022

Electric vehicle wireless power transfer (WPT) systems - Part 3: Specific requirements for magnetic field wireless power transfer systems

IEC 61980-3:2022 applies to the off-board supply equipment for wireless power transfer via magnetic field (MF-WPT) to electric road vehicles for purposes of supplying electric energy to the RESS (rechargeable energy storage system) and/or other on-board electrical systems. The MF-WPT system operates at standard supply voltage ratings per IEC 60038 up to 1 000 V AC and up to 1 500 V DC from the supply network. The power transfer takes place while the electric vehicle (EV) is stationary.
Off-board supply equipment fulfilling the requirements in this document are intended to operate with EV devices fulfilling the requirements described in ISO 19363.
The aspects covered in this document include
– the characteristics and operating conditions,
– the required level of electrical safety,
– requirements for basic communication for safety and process matters if required by a MF WPT system,
– requirements for positioning to assure efficient and safe MF-WPT power transfer, and
– specific EMC requirements for MF-WPT systems.
The following aspects are under consideration for future documents:
– requirements for MF-WPT systems for two- and three-wheel vehicles,
– requirements for MF-WPT systems supplying power to EVs in motion,
– requirements for bidirectional power transfer,
– requirements for flush mounted primary device,
– requirements for MF-WPT systems for heavy duty vehicle, and
– requirements for MF-WPT systems with inputs greater than 11,1 kVA.
This document does not apply to
– safety aspects related to maintenance, and
– trolley buses, rail vehicles and vehicles designed primarily for use off-road.
IEC 61980-3:2022 is to be used in conjunction with IEC 61980-1:2020.

Systèmes de transfert de puissance sans fil (WPT) pour véhicules électriques – Partie 3: Exigences spécifiques pour les systèmes de transfert de puissance sans fil par champ magnétique

L'IEC 61980-3:2022 s'applique au matériel d'alimentation non embarqué pour le transfert de puissance sans fil par champ magnétique (MF-WPT) aux véhicules électriques routiers, afin d'assurer l'alimentation en énergie électrique du RESS (système de stockage d'énergie rechargeable) et/ou d'autres systèmes électriques embarqués. Le système MF-WPT fonctionne aux tensions d'alimentation assignées normalisées selon l'IEC 60038, jusqu'à 1 000 V en courant alternatif et jusqu'à 1 500 V en courant continu, du réseau d'alimentation. Le transfert de puissance a lieu lorsque le véhicule électrique (VE) est immobile.
Un matériel d'alimentation non embarqué qui satisfait aux exigences du présent document est prévu pour fonctionner avec des dispositifs de VE qui satisfont aux exigences décrites dans l'ISO 19363.
Le présent document couvre:
– les caractéristiques et les conditions de fonctionnement;
– le niveau exigé de sécurité électrique;
– les exigences de communication de base pour les questions de sécurité et de processus, si un système MF WPT l'exige;
– les exigences de positionnement pour assurer un transfert de puissance MF-WPT efficace et sûr; et
– les exigences de compatibilité électromagnétique (CEM) spécifiques aux systèmes MF WPT.
Les aspects suivants sont à l'étude pour les documents ultérieurs:
– les exigences relatives aux systèmes MF-WPT pour véhicules à deux et trois roues;
– les exigences relatives aux systèmes MF-WPT qui alimentent les VE en mouvement;
– les exigences relatives au transfert de puissance bidirectionnel;
– les exigences relatives aux dispositifs principaux encastrés;
– les exigences relatives aux systèmes MF-WPT pour véhicules utilitaires lourds; et
– les exigences relatives aux systèmes MF-WPT avec des puissances d'entrée supérieures à 11,1 kVA.
Le présent document ne s'applique pas
– aux aspects de sécurité relatifs à la maintenance; et
– aux trolleybus, aux véhicules ferroviaires et aux véhicules conçus principalement pour une exploitation non routière.
L'IEC 61980-3:2022 doit être utilisée conjointement avec l'IEC 61980-1:2020.

General Information

• Status: Published
• Publication Date: 22-Nov-2022
• ICS: 43.120 - Electric road vehicles
• Technical Committee: TC 69 - Electrical power/energy transfer systems for electrically propelled road vehicles and industrial trucks
• Drafting Committee: WG 7 - TC 69/WG 7
• Current Stage: PPUB - Publication issued
• Start Date: 23-Nov-2022
• Completion Date: 02-Dec-2022

Relations

• Revises: IEC TS 61980-3:2019 - Electric vehicle wireless power transfer (WPT) systems - Part 3: Specific requirements for the magnetic field wireless power transfer systems
• Effective Date: 05-Sep-2023

Overview

IEC 61980-3:2022 is an international standard developed by the International Electrotechnical Commission (IEC) that defines specific requirements for magnetic field wireless power transfer (MF-WPT) systems used in electric vehicle (EV) charging. This standard focuses on the off-board supply equipment facilitating wireless power transfer to the rechargeable energy storage system (RESS) and other on-board electrical systems of electric road vehicles while stationary.

The MF-WPT system addressed in IEC 61980-3:2022 operates at standard supply voltages up to 1,000 V AC or 1,500 V DC, adhering to IEC 60038. It is intended for compatibility and interoperability with EV devices following ISO 19363 requirements. This document complements IEC 61980-1:2020, which covers general requirements for electric vehicle WPT systems.

Key Topics

IEC 61980-3:2022 defines critical aspects for the design, safety, operation, and testing of magnetic field wireless power transfer systems, including:

• Characteristics and operating conditions: Defining system parameters to optimize safe and efficient wireless power transfer.
• Electrical safety requirements: Ensuring protection against electric shock and hazards for both users and maintenance personnel.
• Communication protocols: Establishing basic communications between off-board supply and on-board devices for safety monitoring and process control.
• Positioning and alignment: Setting requirements for coil positioning to maximize power transfer efficiency and vehicle alignment accuracy.
• Electromagnetic compatibility (EMC): Specifying EMC standards to minimize interference with other electrical systems and ensure reliable operation.
• General supply device requirements: Covering system architecture, power transfer efficiency, cable specifications, construction, durability, and installation guidelines.
• Protection levels: Guidelines for ingress protection (IP) ratings and mechanical strength to ensure system reliability under different environmental conditions.

The standard also outlines future considerations for:

• MF-WPT systems for two- and three-wheel vehicles.
• Power transfer to EVs while in motion.
• Bidirectional wireless power transfer capabilities.
• Flush mounted primary devices.
• Systems designed for heavy-duty vehicles.
• Systems with input power exceeding 11.1 kVA.

Applications

IEC 61980-3:2022 enables the development and deployment of magnetic field wireless charging systems specifically tailored for electric road vehicles such as passenger cars. The wireless power transfer technology described offers:

• Convenient and cable-free EV charging to enhance user experience.
• Safe and standardized off-board charging infrastructure that complies with international electrical and safety regulations.
• Compatibility with a wide range of electric vehicles adhering to ISO 19363 requirements.
• Potential expansion to various vehicle categories, including heavy-duty and two/three-wheel EVs, supporting future mobility trends.
• Foundations for integrating advanced functionalities like dynamic charging and bidirectional power flow in upcoming enhancements.

This standard is vital for manufacturers, system integrators, infrastructure providers, and regulatory bodies involved in the design, certification, and maintenance of EV wireless charging systems.

Related Standards

Implementing IEC 61980-3:2022 should be considered alongside the following standards for comprehensive wireless charging solutions:

• IEC 61980-1:2020 – General requirements for electric vehicle wireless power transfer systems.
• ISO 19363 – Specifies requirements for wireless power transfer communication and control between EV supply equipment and vehicles.
• IEC 60038 – Standard voltages that define standard supply voltage ratings applicable to WPT systems.
• EMC Standards – Relevant electromagnetic compatibility standards ensuring devices meet interference and immunity benchmarks.
• Safety Standards for Electrical Equipment – Covering electrical protection, shock prevention, and environmental resilience.

Adhering to this suite of standards promotes interoperability, safety, reliability, and global alignment in wireless power transfer technologies for electric vehicles.

---

By following IEC 61980-3:2022, stakeholders can ensure the deployment of efficient, safe, and interoperable magnetic field wireless charging systems that support the widespread adoption of electric vehicles and advance sustainable transportation ecosystems.

Standards Content (Sample)

IEC 61980-3 ®
Edition 1.0 2022-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric vehicle wireless power transfer (WPT) systems –
Part 3: Specific requirements for magnetic field wireless power transfer systems

Systèmes de transfert de puissance sans fil (WPT) pour véhicules électriques –
Partie 3: Exigences spécifiques pour les systèmes de transfert de puissance
sans fil par champ magnétique
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IEC 61980-3 ®
Edition 1.0 2022-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric vehicle wireless power transfer (WPT) systems –

Part 3: Specific requirements for magnetic field wireless power transfer systems

Systèmes de transfert de puissance sans fil (WPT) pour véhicules électriques –

Partie 3: Exigences spécifiques pour les systèmes de transfert de puissance

sans fil par champ magnétique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 43.120 ISBN 978-2-8322-6023-4

– 2 – IEC 61980-3:2022 © IEC 2022
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 Abbreviated terms . 15
5 General . 15
6 Classification . 15
7 General supply device requirements . 17
7.1 General architecture . 17
7.2 Power transfer requirements . 18
7.3 Efficiency . 21
7.4 Alignment . 22
7.5 Activities provided by WPT system . 22
8 Communication . 24
9 Power transfer interoperability . 24
10 Protection against electric shock . 25
10.1 General requirements . 25
10.2 Degree of protection against access to hazardous-live-parts . 25
11 Specific requirements for WPT systems . 25
12 Power cable requirements . 29
13 Constructional requirements . 30
13.1 Supply device dimensions and installation requirements . 30
13.4 IP degrees . 30
14 Strength of materials and parts . 30
15 Service and test conditions . 31
16 Electromagnetic compatibility (EMC) . 32
16.1 Load and operating conditions . 32
17 Marking and instructions . 38
Annex A (normative) Circular reference EVPC . 54
A.1 Circular reference EVPCs for MF-WPT1 . 54
A.2 Circular reference EVPCs for MF-WPT1/MF-WPT2 . 63
A.3 Circular reference EVPCs for MF-WPT3 . 72
Annex B (informative) Examples of other secondary devices. 82
B.1 DD secondary device for MF-WPT1/Z1 . 82
B.2 DD secondary device for MF-WPT1/Z2 . 83
B.3 DD secondary device for MF-WPT2/Z1 . 83
B.4 DD secondary device for MF-WPT2/Z2 . 84
B.5 DD secondary device for MF-WPT2/Z3 . 85
B.6 DD secondary device for MF-WPT3/Z1 . 86
B.7 DD secondary device for MF-WPT3/Z2 . 87
B.8 DD secondary device for MF-WPT3/Z3 . 88
Annex C (informative) Coil position in parking spot . 90
C.1 General . 90

C.2 Width of vehicles and parking spots . 90
C.3 Placement along the direction of travel . 90
Annex D (informative) Theoretical approach for system interoperability . 92
D.1 General . 92
D.2 Magnetic and electric interoperability . 92
D.3 Compliance test and measurement specifications . 109
Annex E (informative) Determining centre alignment point . 116
E.1 General . 116
E.2 Laboratory procedure for determining the approximate centre alignment
point of a primary device of an SPC with a secondary device of a reference
EVPC . 116
E.3 Laboratory procedure for determining the approximate centre alignment
point of an EVPC with a primary device of a reference SPC . 116
E.4 Determining the centre alignment point for a coil pair through simulation . 116
Bibliography . 117

Figure 101 – Surface mounted . 16
Figure 102 – Flush mounted . 16
Figure 1 – Example of an MF-WPT system . 18
Figure 103 – Test bench protection areas . 27
Figure 104 – Example of test bench setup (version 1) – View from above . 33
Figure 105 – Example of test bench setup (version 2) – View from above . 34
Figure 106 – Side view of test setup shown in Figure 104 . 35
Figure 107 – Example of vehicle test setup (version 1) – View from above . 36
Figure 108 – Example of vehicle test setup (version 2) – View from above . 37
Figure 109 – Side view of test setup shown in Figure 107 . 38
Figure 110 – Illustration of test positions . 41
Figure A.1 – Mechanical dimensions of the MF-WPT1/Z1 reference secondary device . 55
Figure A.2 – Schematic of the EV power electronics for the MF-WPT1/Z1 reference
EVPC . 56
Figure A.3 – Impedance compensation circuit . 56
Figure A.4 – Example of a rectifier circuit . 57
Figure A.5 – Mechanical dimensions of the MF-WPT1/Z2 reference secondary device . 58
Figure A.6 – Schematic of the EV power electronics for the MF-WPT1 reference EVPC . 59
Figure A.7 – Impedance compensation circuit . 59
Figure A.8 – Example of a rectifier circuit . 60
Figure A.9 – Mechanical dimensions of the MF-WPT1/Z3 reference secondary device . 61
Figure A.10 – Schematic of the EV power electronics for the MF-WPT1/Z3 reference
EVPC . 62
Figure A.11 – Impedance compensation circuit . 62
Figure A.12 – Example of a rectifier circuit . 63
Figure A.13 – Mechanical dimensions of the MF-WPT1 and MF-WPT2 Z1 reference
secondary device . 64
Figure A.14 – Schematic of the EV power electronics for the MF-WPT1 and MF-WPT2
Z1 reference EVPC . 65
Figure A.15 – Example of an impedance compensation circuit using variable
reactances . 65

– 4 – IEC 61980-3:2022 © IEC 2022
Figure A.16 – Example of a rectifier circuit . 66
Figure A.17 – Mechanical dimensions of the MF-WPT1 and MF-WPT2 Z2 reference
secondary device . 67
Figure A.18 – Schematic of the EV power electronics for the MF-WPT1 and MF-WPT2
Z2 reference EVPC . 68
Figure A.19 – Example of impedance compensation circuit using variable reactances . 68
Figure A.20 – Example of a rectifier circuit . 69
Figure A.21 – Mechanical dimensions of the MF-WPT1 and MF-WPT2 Z3 reference
secondary device . 70
Figure A.22 – Schematic of the EV power electronics for the MF-WPT1 and MF-WPT2
reference EVPC . 71
Figure A.23 – Example of impedance compensation circuit using variable reactances . 71
Figure A.24 – Example of a rectifier circuit . 72
Figure A.25 – Mechanical dimensions of the MF-WPT3/Z1 reference secondary device . 73
Figure A.26 – Schematic of the EV power electronics for the MF-WPT3 reference

EVPC . 74
Figure A.27 – Example for impedance compensation circuit using variable reactances . 74
Figure A.28 – Example for an output filter and rectifier . 75
Figure A.29 – Mechanical dimensions of the MF-WPT3/Z2 reference secondary device . 76
Figure A.30 – Schematic of the EV power electronics for the MF-WPT3/Z2 reference
EVPC . 77
Figure A.31 – Example for impedance compensation circuit using variable reactances . 77
Figure A.32 – Example of an output filter and rectifier . 78
Figure A.33 – Mechanical dimensions of the MF-WPT3/Z3 reference secondary device . 79
Figure A.34 – Schematic of the EV power electronics for the MF-WPT3 reference
EVPC . 80
Figure A.35 – Example of an impedance compensation circuit using variable

reactances . 80
Figure A.36 – Example of an output filter and rectifier . 81
Figure B.1 – Mechanical dimensions of the MF-WPT1/Z1 DD secondary device. 82
Figure B.2 – Mechanical dimensions of the MF-WPT1/Z2 DD secondary device. 83
Figure B.3 – Mechanical dimensions of the MF-WPT2/Z1 DD secondary device. 84
Figure B.4 – Mechanical dimensions of the MF-WPT2/Z2 DD secondary device. 85
Figure B.5 – Mechanical dimensions of the MF-WPT2/Z3 DD secondary device. 86
Figure B.6 – Mechanical dimensions of the MF-WPT3/Z1 DD secondary device. 87
Figure B.7 – Mechanical dimensions of the MF-WPT3/Z2 DD secondary device. 88
Figure B.8 – Mechanical dimensions of the MF-WPT3/Z3 DD secondary device. 89
Figure D.1 – General schematic of the concept showing the coils with their ports to the
power electronics and the varying parameters . 93
Figure D.2 – Schematic to explain impedance . 100
Figure D.3 – General behaviour of the reflected impedance (example) . 102
Figure D.4 – Impedance space at the primary coil (example) . 107
Figure D.5 – Impedance spaces of the reference primary coil and alternate electronics . 108
Figure D.6 – Test set-up for reference or product primary coil electric interoperability
conformance tests . 110
Figure D.7 – Coaxial coil gauge device "CC325" . 113

Figure D.8 – Transversal coil gauge device "DD275" . 115

Table 101 – MF-WPT power classes . 16
Table 102 – Supported secondary device ground clearance range . 17
Table 103 – Compatibility class A supply device output power ramp rates . 20
Table 104 – Minimum power transfer efficiency with compatibility class A supply device
and normative reference EV device of same power class . 21
Table 105 – Minimum power transfer efficiency with compatibility class A supply device
and normative reference EV device of different power classes . 21
Table 106 – Minimum power transfer efficiency for a compatibility class B supply
device and specified EVPC . 22
Table 107 – Alignment tolerance of a primary device (compatibility class A) . 22
Table 108 – Summary requirements according to compatibility class . 23
Table 109 – Alignment positions and offset values for primary devices which are part of
compatibility class A supply devices . 42
Table 110 – Compatibility class A test 2 test positions . 44
Table 111 – Example of compatibility class B supply device test 2 test positions . 47
Table 112 – Test bodies for touch hazard . 48
Table 113 – Test objects for ignition risk test . 48
Table 114 – Vehicle detection action. 53
Table A.1 – Values of circuit elements for Figure A.2 . 56
Table A.2 – Range of coupling factors . 57
Table A.3 – Values of circuit elements for Figure A.6 . 59
Table A.4 – Range of coupling factors . 60
Table A.5 – Values of circuit elements for Figure A.10 . 62
Table A.6 – Range of coupling factors . 63
Table A.7 – Values of circuit elements for Figure A.14 . 65
Table A.8 – Values of variable reactances . 66
Table A.9 – Coupling factors and coil current MF- WPT1 and MF-WPT2 Z1 . 66
Table A.10 – Values of circuit elements for Figure A.18 . 68
Table A.11 – Values of variable reactances . 69
Table A.12 – Coupling factors and coil current MF- WPT1 and MF-WPT2 Z2 . 69
Table A.13 – Values of circuit elements for Figure A.22 . 71
Table A.14 – Values of variable reactances . 72
Table A.15 – Coupling factors and coil current MF- WPT1 and MF-WPT2 Z3 . 72
Table A.16 – Values of circuit elements for Figure A.26 . 74
Table A.17 – Values of variable reactances . 75
Table A.18 – Inductance values for Figure A.28 . 75
Table A.19 – Coupling factors and coil current MF- WPT3/Z1 . 75
Table A.20 – Values of circuit elements for Figure A.30 . 77
Table A.21 – Values of variable reactances . 78
Table A.22 – Inductance values for Figure A.32 . 78
Table A.23 – Coupling factors and coil current MF- WPT3/Z2 . 78
Table A.24 – Values of circuit elements for Figure A.17 . 80

– 6 – IEC 61980-3:2022 © IEC 2022
Table A.25 – Values of variable reactances . 80
Table A.26 – Inductance values for Figure A.19 . 81
Table A.27 – Coupling factors and coil current MF- WPT3/Z3 . 81
Table B.1 – Mechanical dimensions of the MF-WPT1/Z1 DD secondary device . 82
Table B.2 – Mechanical dimensions of the MF-WPT1/Z2 DD secondary device . 83
Table B.3 – Mechanical dimensions of the MF-WPT2/Z1 DD reference secondary
device . 84
Table B.4 – Mechanical dimensions of the MF-WPT2/Z2 DD reference secondary
device . 85
Table B.5 – Mechanical dimensions of the MF-WPT2/Z3 DD secondary device . 86
Table B.6 – Mechanical dimensions of the MF-WPT3/Z1 DD secondary device . 87
Table B.7 – Mechanical dimensions of the MF-WPT3/Z2 DD secondary device . 88
Table B.8 – Mechanical dimensions of the MF-WPT3/Z3 DD secondary device . 89
Table D.1 – Description of terms . 94
Table D.2 – Fundamental mutual inductance values M for Z1 (in µH) . 97
Table D.3 – Fundamental mutual inductance values M0 for Z2 (in µH) . 98
Table D.4 – Fundamental mutual inductance values M0 for Z3 (in µH) . 99
Table D.5 – Explanation of terms . 100
Table D.6 – Voltages (RMS) required to be induced in circular reference secondary coils . 105
Table D.7 – Recommended parameters for primary coil impedance space . 108

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC VEHICLE WIRELESS POWER TRANSFER (WPT) SYSTEMS –

Part 3: Specific requirements for magnetic
field wireless power transfer systems

FOREWORD
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IEC 61980-3 has been prepared by IEC technical committee 69: Electrical power/energy
transfer systems for electrically propelled road vehicles and industrial trucks. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
69/857/FDIS 69/866/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

– 8 – IEC 61980-3:2022 © IEC 2022
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
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This part is to be used in conjunction with IEC 61980-1:2020.
The clauses of the particular requirements in this document supplement or modify the
corresponding clauses in IEC 61980-1:2020. Where the text indicates an "addition" to or a
"replacement" of the relevant requirement, test specification or explanation of
IEC 61980‑1:2020, these changes are made to the relevant text of IEC 61980-1:2020, which
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"Clause/Subclause xx of IEC 61980-1:2020 is applicable" are used. Additional items to those
of IEC 61980-1:2020 are numbered starting 101. Annexes are lettered from A onwards.
A list of all parts of the IEC 61980 series, published under the general title Electric vehicle
wireless power transfer (WPT) systems, 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.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

INTRODUCTION
The IEC 61980 series is published in separate parts according to the following structure:
– IEC 61980-1 covers general requirements for electric road vehicle (EV) wireless power
transfer (WPT) systems including general background and definitions (e.g. efficiency,
electrical safety, EMC, EMF);
– IEC 61980-2 specifically applies to magnetic field wireless power transfer (MF-WPT) for
electric road vehicles (EV) and covers specific requirements for system activities and
communication between the electric road vehicle side and the off-board side, including
general background and definitions;
– IEC 61980-3 covers specific power transfer requirements for the off-board side of magnetic
field wireless power transfer systems for electric road vehicles (e.g. efficiency, electrical
safety, EMC, EMF).
Requirements for the on-board side of MF-WPT for electric road vehicles are covered in
ISO 19363.
IEC 61980-3 follows the structure of IEC 61980-1:2020.

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ELECTRIC VEHICLE WIRELESS POWER TRANSFER (WPT) SYSTEMS –

Part 3: Specific requirements for magnetic
field wireless power transfer systems

1 Scope
This part of IEC 61980 applies to the off-board supply equipment for wireless power transfer
via magnetic field (MF-WPT) to electric road vehicles for purposes of supplying electric energy
to the RESS (rechargeable energy storage system) and/or other on-board electrical systems.
The MF-WPT system operates at standard supply voltage ratings per IEC 60038 up to
1 000 V AC and up to 1 500 V DC from the supply network. The power transfer takes place
while the electric vehicle (EV) is stationary.
Off-board supply equipment fulfilling the requirements in this document are intended to operate
with EV devices fulfilling the requirements described in ISO 19363.
The aspects covered in this document include
– the characteristics and operating conditions,
– the required level of electrical safety,
– requirements for basic communication for safety and process matters if required by a
MF-WPT system,
– requirements for positioning to assure efficient and safe MF-WPT power transfer, and
– specific EMC requirements for MF-WPT systems.
The following aspects are under consideration for future documents:
– requirements for MF-WPT systems for two- and three-wheel vehicles,
– requirements for MF-WPT systems supplying power to EVs in motion,
– requirements for bidirectional power transfer,
– requirements for flush mounted primary device,
– requirements for MF-WPT systems for heavy duty vehicle, and
– requirements for MF-WPT systems with inputs greater than 11,1 kVA.
This document does not apply to
– safety aspects related to maintenance, and
– trolley buses, rail vehicles and vehicles designed primarily for use off-road.
NOTE The terms used in this document are specifically for MF-WPT.
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 60529, Degrees of protection provided by enclosures (IP Code)
IEC 61439-1:2020, Low-voltage switchgear and controlgear assemblies – Part 1: General rules

IEC 61439-7:2018, Low-voltage switchgear and controlgear assemblies – Part 7: Assemblies
for specific applications such as marinas, camping sites, market squares, electric vehicle
charging stations
IEC 61980-1:2020, Electric vehicle wireless power transfer (WPT) systems – Part 1: General
requirements
IEC 61980-2:—, Electric vehicle wireless power transfer (WPT) systems – Part 2: Specific
requirements for MF-WPT system communication and activities
ISO 19363:2020, Electrically propelled road vehicles – Magnetic field wireless power transfer –
Safety and interoperability requirements
ISO 20653, Road vehicles – Degrees of protection (IP code) – Protection of electrical equipment
against foreign objects, water and access
ICNIRP, ICNIRP guidelines for limiting exposure to time-varying electric and magnetic fields
(1 Hz – 100 kHz), Health Physics 99(6):818‐836; 2010
Recommendation ITU-R SM.2110-1:2019, Guidance on frequency ranges for operation of non-
beam wireless power transmission for electric vehicles
3 Terms and definitions
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
Clause 3 of IEC 61980-1:2020 is applicable.
Additional terms and definitions:
3.101
accessible part
part of equipment that can be touched without the use of a tool, excluding parts when under the
vehicle
3.102
alignment
relative position in X- and Y- direction of the secondary device to the primary device for a given
secondary device ground clearance
3.103
alignment tolerance area
intended WPT operating area in X- and Y- direction for a given secondary device ground
clearance
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3.104
centre alignment point
spatial X, Y centre of the alignment tolerance area
Note 1 to entry: The centre alignment point is not a fixed point for any single coil. It only has relevance for a primary
and secondary device combination and is specific for that combination.
3.105
charge session
period when the SECC is in the WPT_S_PTA or WPT_S_PT state as defined in IEC 61980‑2
3.106
compatibility class A supply device
supply device that interoperates with compatibility class A EV devices
Note 1 to entry: See ISO 19363:2020, Clause 6.
Note 2 to entry: A compatibility class A supply device is interoperable with all normative reference EVPCs – see
Annex A.
3.107
compatibility class B supply device
supply device that operates with at least one compatibility class B EV device and might
interoperate with one or more compatibility class A EV devices
Note 1 to entry: See ISO 19363:2020, Clause 6.
Note 2 to entry: Interoperability with any of the normative reference EVPCs is optional.
3.108
connecting cable
cable which connects a physical unit containing portions of the SPC to another physical unit
containing portions of the SPC
Note 1 to entry: Cables within a physical unit are not connecting cables.
3.109
DUT
device under test
3.110
electric vehicle communication controller
EVCC
embedded system within the vehicle that implements the communication between the vehicle
and the SECC in order to support specific functions
Note 1 to entry: Such specific functions could be controlling input and output channels, encryption or data transfer
between the vehicle and the SECC.
[SOURCE: ISO 15118-1:2019, 3.1.31]
3.111
EV power circuit
EVPC
on-board component assembly comprising the secondary device and EV power electronics as
well as the mechanical connections
SEE: Figure 1.
3.112
EV power electronics
on-board component that converts the power and frequency from the secondary device to the
DC output of the EVPC
EXAMPLE Impedance matching network (IMN), filter, rectifier, impedance converter
3.113
flush mounted
mounting of a primary device in such a manner that the top covering of the primary device is
flush with the pavement
3.114
foreign object
object that is not an attached part of the vehicle or the WPT system
3.115
fundamental mutual inductance
mutual inductance of two specific coils at a specific physical position relative to each other
3.116
gauge device
test device to characterize magnetic fields associated with a coil
3.117
geometric centre
spatial X, Y centre of the primary coil or the secondary coil
3.118
MF-WPT power class
power class of a supply device of MF-WPT systems defined from the perspective of the
maximum power drawn from the supply network in order to drive the supply device
3.119
magnetic field WPT
MF-WPT
transfer of electrical energy from a power source to an electrical load via a magnetic field without
galvanic connection
3.120
magnetic resonance
magnetic field wireless power transfer (MF-WPT) that utilizes one or more high quality factor
coils and one or more impedance matching networks or compensation networks operating at or
near resonance
3.121
operating frequency
frequency used to transmit energy between the supply device and the EV device within the
system frequency range
3.122
power transfer efficiency
ratio of the output power of the EVPC divided by the input power of the SPC
3.123
primary coil
component of the primary device comprising one or more electrical windings and magnetic
materials that generate a magnetic field for MF-WPT

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3.124
primary device
off-board component comprising the primary coil and its compensation network to generate and
shape the magnetic field for MF-WPT
Note 1 to entry: Includes housings, covers and cabling.
3.125
reference EVPC
EVPC that serves for conformance testing purposes
3.126
reference SPC
SPC that serves for conformance testing purposes
3.127
remaining package
assembly pac
...