IEC PAS 61980-4:2025

Electric vehicle wireless power transfer (WPT) systems - Part 4: Interoperability and safety of high-power wireless power transfer (H-WPT) for electric vehicles

IEC PAS 61980-4:2025 applies to the off-board supply equipment for high-power wireless power transfer (H-WPT) via magnetic field (MF-WPT) to electric road vehicles for purposes of supplying electric energy to the RESS (rechargeable energy storage system) or other on-board electrical systems, or both.
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.
The aspects covered in this document include
– the characteristics and operating conditions,
– specific power transfer requirements for the off-board side of magnetic field high-power wireless power transfer systems for electric road vehicles,
– 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
This document does not apply to
– safety aspects related to maintenance, and
– trolley buses, rail vehicles and vehicles designed primarily for use off-road

General Information

• Status: Published
• Publication Date: 24-Nov-2025
• 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: 25-Nov-2025
• Completion Date: 21-Nov-2025

Overview

IEC PAS 61980-4:2025 is a Publicly Available Specification (IEC) that defines interoperability and safety requirements for high‑power wireless power transfer (H‑WPT) systems using magnetic field coupling (MF‑WPT) to supply electric road vehicles. It applies to the off‑board supply equipment that transfers energy to the vehicle’s rechargeable energy storage system (RESS) or other on‑board systems while the EV is stationary. The standard covers systems supplied at standard voltages per IEC 60038 - up to 1 000 V AC and 1 500 V DC - and addresses functional, safety and electromagnetic compatibility (EMC) aspects required for reliable, interoperable high‑power wireless charging.

Key Topics

• Scope & exclusions: Focuses on off‑board H‑WPT for road vehicles; excludes maintenance safety, trolley buses, rail vehicles and primarily off‑road vehicles.
• System characteristics & operating conditions: Defines general architecture, mounting types (surface, flush, embedded) and test setups for H‑WPT supply devices.
• Power transfer requirements: Covers frequency, input/output voltage and kVA levels, rated output power classes, dynamic performance and minimum power‑transfer efficiency.
• Interoperability & compatibility classes: Classification of supply/vehicle compatibility and reference EV power converter (EVPC) configurations (informative annexes include EVPC and coil reference designs).
• Alignment & positioning: Requirements and tolerance areas to assure efficient and safe power transfer between primary (off‑board) and secondary (vehicle) devices.
• Electrical safety & protection: Required levels of protection against electric shock and constructional requirements for off‑board equipment.
• Communication: Basic communications for safety and process control between supply equipment and vehicle where required.
• EMC: Specific electromagnetic compatibility requirements and in‑situ/test bench measurement procedures.
• Marking, instructions & testing: Requirements for user/manufacturer information, service/test conditions and test procedures.

Applications

IEC PAS 61980-4:2025 is intended for:

• EV charging infrastructure manufacturers developing H‑WPT supply units
• EV OEMs integrating compatible secondary devices and EVPCs
• Test laboratories and certification bodies performing interoperability, safety and EMC testing
• Utilities, fleet operators and city planners deploying wireless high‑power charging stations
• Standards and compliance engineers ensuring products meet safety and compatibility expectations

Use this standard to design, test and certify MF‑WPT systems that are interoperable, safe, and EMC‑compliant for high‑power wireless charging of electric road vehicles.

Related Standards

• IEC 60038 (standard supply voltage ratings) - referenced for voltage classifications.
• Other parts of the IEC 61980 series (wireless power transfer standards) provide complementary requirements for system-level testing and on‑board device specifications.

Standards Content (Sample)

IEC PAS 61980-4 ®
Edition 1.0 2025-11
PUBLICLY AVAILABLE
SPECIFICATION
Electric vehicle wireless power transfer (WPT) systems -
Part 4: Interoperability and safety of high-power wireless power transfer (H-WPT)
for electric vehicles
ICS 43.120  ISBN 978-2-8327-0851-4

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CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Abbreviated terms . 9
5 General . 9
6 Classification . 10
6.1 Compatibility classes . 10
6.2 Classification with power capacity in high-power wireless power transfer for
electric vehicles . 10
6.3 Installation . 10
7 General supply device requirements . 12
7.1 General architecture . 12
7.2 Power transfer requirements . 13
7.2.1 Frequency requirements . 13
7.2.2 Input voltage and kVA levels . 14
7.2.3 Output voltage levels . 14
7.2.4 Output power levels . 14
7.2.5 Dynamic performance . 14
7.3 Power transfer efficiency . 15
7.4 Alignment . 15
7.4.1 Alignment tolerance area for supply device . 15
7.4.2 Secondary device ground clearance range for supply device . 15
8 Communication . 16
9 Power transfer interoperability . 16
10 Protection against electric shock . 16
11 Specific requirements for WPT systems . 16
12 Power cable requirements . 16
13 Constructional requirements . 16
14 Strength of materials and parts . 16
15 Service and test conditions . 17
16 Electromagnetic compatibility (EMC) . 17
17 Marking and instructions . 19
Annex A (informative) DDQ reference EVPCs for MF-MPT4/5 . 20
A.1 DDQ reference EVPCs for MF-WPT4 . 20
A.1.1 General . 20
A.1.2 MF-WPT4/Z1 reference EVPC . 20
A.1.3 MF-WPT4/Z2 reference EVPC . 22
A.1.4 MF-WPT4/Z3 reference EVPC . 25
A.2 DDQ reference EVPCs for MF-WPT5 . 28
A.2.1 General . 28
A.2.2 MF-WPT5/Z1 reference EVPC . 29
A.2.3 MF-WPT5/Z2 reference EVPC . 31
A.2.4 MF-WPT5/Z3 reference EVPC . 34
Annex B (informative) Multi-phase coil reference EVPCs for MF-WPT4/5 . 38
B.1 Multi-phase coil reference EVPCs for MF-WPT4 . 38
B.1.1 General . 38
B.1.2 MF-WPT4/Z1 reference EVPC . 38
B.1.3 MF-WPT4/Z2 reference EVPC . 40
B.1.4 MF-WPT4/Z3 reference EVPC . 43
B.2 Multi-phase coil reference EVPCs for MF-WPT5 . 45
B.2.1 General . 45
B.2.2 MF-WPT5/Z1 reference EVPC . 46
B.2.3 MF-WPT5/Z2 reference EVPC . 48
B.2.4 MF-WPT5/Z3 reference EVPC . 51
Annex C (informative) Reference WPT system for EVPCs with a rated output power
level MF-WPT5 . 54
C.1 General . 54
C.2 Mechanical design of the secondary device, Z2 . 54
C.3 Electrical design of the reference EVPC, Z2. 54
C.4 Mechanical design of the secondary device, Z3 . 55
C.5 Electrical design of the reference EVPC, Z3. 56
C.6 Coupling and inductance information . 56
Annex D (informative) Flat wire coil reference EVPCs for MF-WPT4 . 57
D.1 General . 57
D.2 MF-WPT4 reference EVPC . 57
D.2.1 General . 57
D.2.2 Mechanical design of the secondary device . 58
D.2.3 Electrical design of the reference VPC . 59
D.2.4 Coupling factor and inductance information . 60
Bibliography . 63

Figure 1 – Surface mounting . 11
Figure 2 – Flush mounting . 11
Figure 3 – Embedded mounting . 12
Figure 4 – Example of M-WPT system . 13
Figure 5 – Example of test bench setup – View from the above . 17
Figure 6 – Example of vehicle test setup . 18
Figure 7 – Example of measurement in-situ . 19
Figure 8 – In-situ measurement procedure . 19
Figure A.1 – General layout of the MF-WPT4/Z1 reference secondary device . 20
Figure A.2 – Mechanical dimensions of the MF-WPT4/Z1 reference secondary device . 21
Figure A.3 – Schematic of the EV power electronics for the MF-WPT4 reference EVPC . 22
Figure A.4 – General layout of the MF-WPT4/Z2 reference secondary device . 23
Figure A.5 – Mechanical dimensions of the MF-WPT4/Z2 reference secondary device . 24
Figure A.6 – Schematic of the EV power electronics for the MF-WPT4 reference EVPC . 25
Figure A.7 – General layout of the MF-WPT4/Z3 reference secondary device . 26
Figure A.8 – Mechanical dimensions of the MF-WPT4/Z3 reference secondary device . 27
Figure A.9 – Schematic of the EV power electronics for the MF-WPT4 reference EVPC . 28
Figure A.10 – General layout of the MF-WPT5/Z1 reference secondary device . 29
Figure A.11 – Mechanical dimensions of the MF-WPT5/Z1 reference secondary device . 30
Figure A.12 – Schematic of the EV power electronics for the MF-WPT5 reference
EVPC . 31
Figure A.13 – General layout of the MF-WPT5/Z2 reference secondary device . 32
Figure A.14 – General Layout of the MF-WPT5/Z2 reference secondary device . 33
Figure A.15 – Schematic of the EV power electronics for the MF-WPT5 reference
EVPC . 34
Figure A.16 – General layout of the MF-WPT5/Z3 reference secondary device . 35
Figure A.17 – Mechanical dimensions of the MF-WPT5/Z3 reference secondary device . 36
Figure A.18 – Schematic of the EV power electronics for the MF-WPT5 reference
EVPC . 37
Figure B.1 – General layout of the MF-WPT4/Z1 reference secondary device . 38
Figure B.2 – Mechanical dimensions of the MF-WPT4/Z1 reference secondary device . 39
Figure B.3 – Schematic of the EV power electronics for the MF-WPT4/Z1 reference
EVPC . 40
Figure B.4 – General layout of the MF-WPT4/Z2 reference secondary device . 41
Figure B.5 – Mechanical dimensions of the MF-WPT4/Z2 reference secondary device . 41
Figure B.6 – Schematic of the EV power electronics for the MF-WPT4/Z2 reference
EVPC . 42
Figure B.7 – General layout of the MF-WPT4/Z3 reference secondary device . 43
Figure B.8 – Mechanical dimensions of the MF-WPT4/Z3 reference secondary device . 44
Figure B.9 – Schematic of the EV power electronics for the MF-WPT4/Z3 reference
EVPC . 45
Figure B.10 – General layout of the MF-WPT5/Z1 reference secondary device . 46
Figure B.11 – Mechanical dimensions of the MF-WPT5/Z1 reference secondary device . 47
Figure B.12 – Schematic of the EV power electronics for the MF-WPT5/Z1 reference
EVPC . 48
Figure B.13 – General layout of the MF-WPT5/Z2 reference secondary device . 49
Figure B.14 – Mechanical dimensions of the MF-WPT5/Z2 reference secondary device . 49
Figure B.15 – Schematic of the EV power electronics for the MF-WPT5/Z2 reference
EVPC . 50
Figure B.16 – General layout of the MF-WPT5/Z3 reference secondary device . 51
Figure B.17 – Mechanical dimensions of the MF-WPT5/Z3 reference secondary device . 52
Figure B.18 – Schematic of the EV power electronics for the MF-WPT5/Z3 reference
EVPC . 53
Figure C.1 – Mechanical dimensions . 54
Figure C.2 – Electrical schematic of EVPC . 55
Figure C.3 – Mechanical dimensions . 55
Figure C.4 – Electrical schematic of EVPC . 56
Figure D.1 – Mechanical dimensions of the secondary device . 58
Figure D.2 – Electrical schematic of reference EVPC, Z1 . 59
Figure D.3 – Electrical schematic of reference EVPC, Z2 . 59
Figure D.4 – Electrical schematic of reference EVPC, Z3 . 60

Table 1 – Capacity of the rated power in high-power wireless power transfer for electric
vehicles . 10
Table 2 – Minimum power transfer efficiency with supply device and EV device of same
power class . 15
Table 3 – Minimum power transfer efficiency with different power classes . 15
Table 4 – Alignment tolerance of a primary device . 15
Table A.1 – Values of circuit elements for Figure A.3 . 22
Table A.2 – Coupling factors and coil current MF-WPT4/Z1 . 22
Table A.3 – Values of circuit elements for Figure A.6 . 25
Table A.4 – Coupling factors and coil current MF-WPT4/Z2 . 25
Table A.5 – Values of circuit elements for Figure A.9 . 28
Table A.6 – Coupling factors and coil current MF-WPT4/Z3 . 28
Table A.7 – Values of circuit elements for Figure A.12 . 31
Table A.8 – Coupling factors and coil current MF-WPT5/Z1 . 31
Table A.9 – Values of circuit elements for Figure A.15 . 34
Table A.10 – Coupling factors and coil current MF-WPT5/Z2 . 34
Table A.11 – Values of circuit elements for Figure A.18 . 37
Table A.12 – Coupling factors and coil current -MF-WPT5/Z3 . 37
Table B.1 – Values of circuit elements for Figure B.3 . 40
Table B.2 – Secondary coil inductance and coupling factor for Figure B.3 . 40
Table B.3 – Values of circuit elements for Figure B.6 . 42
Table B.4 – Secondary coil inductance and coupling factor for Figure B.6 . 42
Table B.5 – Values of circuit elements for Figure B.9 . 45
Table B.6 – Secondary coil inductance and coupling factor for Figure B.9 . 45
Table B.7 – Values of circuit elements for Figure B.12 . 48
Table B.8 – Secondary coil inductance and coupling factor for Figure B.12 . 48
Table B.9 – Values of circuit elements for Figure B.15 . 50
Table B.10 – Secondary coil inductance and coupling factor for Figure B.15 . 50
Table B.11 – Values of circuit elements for Figure B.18 . 53
Table B.12 – Secondary coil inductance and coupling factor for Figure B.18 . 53
Table C.1 – Coupling and inductance with Z2 reference EVPC . 56
Table C.2 – Coupling and inductance with Z3 reference EVPC . 56
Table D.1 – Coupling factor and inductance information, Z1 = 130 mm . 60
Table D.2 – Coupling factors, inductance and coil current information for Figure D.2 . 60
Table D.3 – Coupling factor and inductance information, Z2 = 150 mm . 61
Table D.4 – Coupling factors, inductance and coil current information for Figure D.3 . 61
Table D.5 – Coupling factor and inductance information, Z3 = 190 mm . 61
Table D.6 – Coupling factors, inductance and coil current information for Figure D.4 . 61
Table D.7 – Q-factor information . 62

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electric vehicle wireless power transfer (WPT) systems -
Part 4: Interoperability and safety of
high-power wireless power transfer (H-WPT) for electric vehicles

FOREWORD
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IEC PAS 61980-4 has been prepared by IEC technical committee 69: Electrical power/energy
transfer systems for electrically propelled road vehicles and industrial trucks. It is a Publicly
Available Specification.
The text of this Publicly Available Specification is based on the following documents:
Draft Report on voting
69/1068/DPAS 69/1107/RVDPAS
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 Publicly Available Specification 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/publications.
A list of all parts in 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, or
– revised.
NOTE In accordance with ISO/IEC Directives, Part 1, IEC PASs are automatically withdrawn after 4 years.

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 applies to magnetic field wireless power transfer (MF-WPT) for electric road
vehicles 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);
– IEC PAS 61980-4 covers specific power transfer requirements for the off-board side of
magnetic field high power wireless power transfer (H-WPT) systems for electric road
vehicles (e.g. efficiency, electrical safety, EMC, EMF).
– IEC PAS 61980-5 covers specific power transfer requirements for the off-board side of
magnetic field dynamic wireless power transfer (MF-D-WPT) systems for electric road
vehicles (e.g. efficiency, electrical safety, EMC, EMF).
– IEC PAS 61980-6 applies to magnetic field dynamic wireless power transfer for electric road
vehicles 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.
1 Scope
This part of IEC 61980 applies to the off-board supply equipment for high-power wireless power
transfer (H-WPT) via magnetic field (MF-WPT) to electric road vehicles for purposes of
supplying electric energy to the RESS (rechargeable energy storage system) or other on-board
electrical systems, or both.
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.
The aspects covered in this document include
– the characteristics and operating conditions,
– specific power transfer requirements for the off-board side of magnetic field high-power
wireless power transfer systems for electric road vehicles,
– 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
This document does not apply to
– safety aspects related to maintenance, and
– trolley buses, rail vehicles and vehicles designed primarily for use off-road
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 60038, IEC standard voltages
IEC 61980-1:2020, Electric vehicle wireless power transfer (WPT) systems - Part 1: General
requirements
IEC 61980-2:2023, Electric vehicle wireless power transfer (WPT) systems - Part 2: Specific
requirements for MF-WPT system communication and activities
IEC 61980-3:2022, Electric vehicle wireless power transfer (WPT) systems - Part 3: Specific
requirements for magnetic field wireless power transfer systems
ITU-R Recommendation SM.2110-1, Guidance on frequency ranges for operation of non-beam
wireless power transmission for electric vehicles
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61980-1 and
IEC 61980-3 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
3.1
embedded depth
Z
RS
distance between the road surface and the top of housing in the primary device
3.2
embedded mounting
mounting of a primary device in such a manner that the top covering of the primary device is
buried (embedded) in the pavement
3.3
high-power wireless power transfer
H-WPT
MF-WPT for electric vehicle with a capacity above 22 kW
3.4
in-situ
position, at the location where the equipment is installed and used or intended to be used, with
the equipment arranged, configured and operational in the same manner as for its subsequent,
final use
3.5
magnetic gap
vertical (Z-direction) distance between the coil of the primary device and the coil of the
secondary device
4 Abbreviated terms
Refer to in IEC 61980-1:2020, Clause 4.
5 General
The supply device (see Figure 4) shall be rated for one or a range of standard nominal voltages
and frequencies as listed in IEC 60038.
The supply device shall be designed and constructed that, in normal use, it "connects" (without
a galvanic connection) to the EV device in a manner that assures that wireless power transfer
functions safely and that its performance is reliable and minimizes the risk of danger to the use
or surroundings.
6 Classification
6.1 Compatibility classes
The supply device is classified according to the following compatibility classes.
– Compatibility class A: Supply devices of this class are intended for interoperable application
and are required to meet a set of safety and performance requirements.
– Compatibility class B: Supply devices of this class are not intended for interoperable
application but still are required to meet the set of safety requirements. Performance
requirements can be different than those of compatibility class A. Supply devices of this
class are tested with compatibility class B EV device.
6.2 Classification with power capacity in high-power wireless power transfer for
electric vehicles
Supply devices in high-power wireless power transfer (H-WPT) for electric vehicles are
classified with the capacity of the rated power as in Table 1.
The manufacturer shall specify the rated power of the supply power circuit.
Table 1 – Capacity of the rated power in high-power wireless
power transfer for electric vehicles
MF-WPT class Rated input (P)
kW
MF-WPT4 11,1 < P ≤ 22
MF-WPT5 22 < P ≤ 50
MF-WPT6 50 < P ≤ 100
MF-WPT7 100 < P ≤ 150
MF-WPT8 150 < P ≤ 250
MF-WPT9 250 < P ≤ 500
6.3 Installation
The primary device is classified according to the type of mounting:
– surface mounting (see Figure 1);
– flush mounting (see Figure 2);
– embedded mounting (see Figure 3).
Key
a primary device
b secondary device
1 top of road surface
2 secondary device ground clearance
Figure 1 – Surface mounting
Key
a primary device
b secondary device
1 top of road surface
2 secondary device ground clearance
Figure 2 – Flush mounting
Key
a primary device
b secondary device
1 top of road surface
2 secondary device ground clearance (Z)
3 embedded depth (Z )
RS
Figure 3 – Embedded mounting
In the embedded mounting, the magnetic gap is the vertical (Z-direction) distance between the
coil of the primary device and the coil of the secondary device.
7 General supply device requirements
7.1 General architecture
Figure 4 shows a representation of the structure of the components referred to throughout this
document. Additional communication and signalling architectures to support MF-WPT activities
apply according to IEC 61980-2.
Key Name Key Name
1 MF-WPT system
11 primary device 21 secondary device
12 supply power electronics 22 EV power electronics
13 supply power circuit (SPC) 23 EV power circuit (EVPC)
supply equipment communication
14 24 EV communication controller (EVCC)
controller (SECC)
15 supply device P2PS controller 25 EV device P2PS controller
16 supply device 26 EV device
100 supply network 200 RESS
a wireless power flow b wireless signalling
c wireless communication
NOTE See IEC 61980-2 for details regarding items 14, 15, 24, 25, b and c.
Figure 4 – Example of M-WPT system
7.2 Power transfer requirements
7.2.1 Frequency requirements
The following frequency requirements apply to both compatibility class A supply devices and
compatibility class B supply devices.
For compatibility class A, the supply device shall operate within the fundamental frequency
range of 79 kHz to 90 kHz in accordance with ITU-R Recommendation SM.2110.1.
For compatibility class B, the supply device shall operate within the fundamental frequency
range of 79 kHz to 90 kHz or 19 kHz to 21 kHz. Only the fundamental frequency is permitted to
be used for power transfer.
For a given charging session, the operating frequency can be selected at low power to be any
frequency within the system frequency range; the operating frequency shall remain fixed within
±0,050 kHz for the duration of that charging session unless the power level is reduced to meet
the low power requirement.
For this purpose, low power is a power level less than or equal to 25 % of full power for the
specific combination of supply device and EV device, determined as the lower of maximum
input (kVA) into the supply device or the rated power out of the EVPC.
7.2.2 Input voltage and kVA levels
The manufacturer shall specify the input voltage range of operation and the rated input kVA.
7.2.3 Output voltage levels
7.2.3.1 Compatibility class A supply device
For a compatibility class A supply device, the reference EVPCs shall provide output voltages at
maximum power levels.
7.2.3.2 Compatibility class B supply device
For a compatibility class B supply device, the minimum and maximum output voltages of the
EVPC(s) are specified by the manufacturer.
– V is the minimum output voltage.
min
– V is the maximum output voltage.
max
is equal to (V – V ).
– V
range max min
7.2.4 Output power levels
7.2.4.1 Compatibility class A supply device
When the WPT power class of the reference EVPC is the same as or higher than the supply
device power class, the maximum power delivered occurs when the input to the supply device
is the rated kVA.
When the WPT power class of the reference EVPC is lower than the supply device power class,
the maximum power delivered occurs when output of the EVPC is at the EVPC rated power
level.
7.2.4.2 Compatibility class B supply device
Supply device shall be able to deliver the rated output power to the EVPC(s) specified by the
manufacturer.
7.2.5 Dynamic performance
For the supply device, the following times for shutdown are required.
In the event of an emergency shutdown condition, the supply device shall ramp down its primary
device coil current and stop power transfer within 1 s of the identification of emergency
shutdown.
In the case of loss of communication between the EVPC and SECC, power shall be reduced to
a level that is low enough to meet EMF requirements within 4 s of the loss of communication,
including up to 2 s for detection of loss of communication to trigger shutdown. Power shall
continue decreasing to zero watts.
When power transfer is set to 0 W or is otherwise stopped, the current in the primary device
coil shall be such that all EMF requirements herein are met.
Regarding EMF requirements, IEC 61980-1:2020, Clause 11, and IEC 61980-3:2022, Clause
101, apply.
7.3 Power transfer efficiency
The supply device shall support the minimum power transfer efficiency according to Table 2
when operating with a reference EVPC of the same WPT power class at its rated input kVA.
Table 2 – Minimum power transfer efficiency with supply
device and EV device of same power class
Alignment Minimum power transfer efficiency
Centre alignment point 85 %
Within alignment tolerance 80 %

Since it is possible that supply devices are rated at a WPT power level that is different from that
of the EVPC to which it is being asked to provide power, provision for that power level difference
is provided in the efficiency requirements as shown in Table 3.
When the supply device is the same power class or is a lower power class than the EVPC, the
efficiency requirements of Table 3 apply when the supply device is operated at its rated input
kVA.
When the supply device is a higher power class than the EVPC, the efficiency requirements of
Table 3 apply when the output of the EVPC is the maximum rated output.
Table 3 – Minimum power transfer efficiency with different power classes
Power class difference between supply device and EV device
Alignment One power class
At centre alignment point 82 %
Within alignment tolerance range 77 %

7.4 Alignment
7.4.1 Alignment tolerance area for supply device
The alignment tolerance area relative to the centre alignment point for the primary device of a
supply device is a rectangle as specified in Table 4.
Table 4 – Alignment tolerance of a primary device
Axis Alignment tolerance range
mm
X ±75
Y ±100
7.4.2 Secondary device ground clearance range for supply device
The compatibility class A supply device shall be able to meet the performance requirements as
a class Z3 supply device per Table 2.
8 Communication
The communication between the supply device and the EV device exchanges information
necessary to start, control and terminate the process of WPT.
The communication and control concept for both compatibility class A supply devices and
compatibility class B supply devices are described in IEC 61980-2.
The communication and control requirements for compatibility class A supply devices are
described in IEC 61980-2.
The hardware to support the communication as described in IEC 61980-2 between the EVCC
and SECC is not specified in this document. See IEC 61980-2 for details.
9 Power transfer interoperability
Interoperability refers to WPT between a supply device and an EV device that were not
specifically designed with each other, for example, WPT between devices from different vendors
or devices of different power classes.
Informative reference devices are shown in the informative Annex A, Annex B, Annex C and
Annex D.
10 Protection against electric shock
IEC 61980-1:2020, Clause 10, and IEC 61980-3, Clause 10, is applicable. Specific
requirements for H-WPT are under consideration.
11 Specific requirements for WPT systems
For EMF test method, refer to IEC 61980-1:2020, 11.8, and IEC 61980-3:2022, 11.8. For heavy-
duty vehicles, the size of mimic plate shall be adjusted considering the intended vehicle.
12 Power cable requirements
IEC 61980-1:2020, Clause 12, shall apply.
The power supply cable should be installed as a litz wire cable in consideration of the rated
frequency in the kHz band.
Insulation resistance and dielectric strength of power cable needs to be measured.
13 Constructional requirements
IEC 61980-1:2020, Clause 13, shall apply.
14 Strength of materials and parts
IEC 61980-1:2020, Clause 14, shall apply.
15 Service and test conditions
IEC 61980-1:2020, Clause 15, shall apply.
16 Electromagnetic compatibility (EMC)
IEC 61980-1:2020, Clause 16, and IEC 61980-3:2022, Clause 16, shall apply.
Figure 5 shows top views of the recommended test bench setup for radiated emissions testing
(with passenger cars).
Key
PD primary device
SD secondary device
SE supply electronics
AN artificial mains networks [and/or common mode absorption device (CMAD)]
Figure 5 – Example of test bench setup – View from the above
Figure 6 shows top views of the recommended vehicle (passenger car) test setup for radiated
emissions testing.
...