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

IEC TS 61980-3:2019 applies to the equipment for the magnetic field wireless power transfer (MF-WPT) of electric power from the supply network 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 voltages ratings per IEC 60038 up to 1 000 V AC and up to 1 500 V DC The power transfer takes place while the electric vehicle (EV) is stationary.
This document also applies to MF-WPT equipment supplied from on-site storage systems (e.g. buffer batteries) at standard supply voltages ratings per IEC 60038 up to 1 000 V AC and up to 1 500 V DC.
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 two- and three-wheel vehicles,
– requirements for MF-WPT systems supplying power to EVs in motion, and
– requirements for bidirectional power transfer.
This standard 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
12-Jun-2019
Current Stage
PPUB - Publication issued
Completion Date
13-Jun-2019
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IEC TS 61980-3:2019 - Electric vehicle wireless power transfer (WPT) systems - Part 3: Specific requirements for the magnetic field wireless power transfer systems
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IEC TS 61980-3
Edition 1.0 2019-06
TECHNICAL
SPECIFICATION
colour
inside
Electric vehicle wireless power transfer (WPT) systems –
Part 3: Specific requirements for the magnetic field wireless power transfer
systems
IEC TS 61980-3:2019-06(en)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC TS 61980-3
Edition 1.0 2019-06
TECHNICAL
SPECIFICATION
colour
inside
Electric vehicle wireless power transfer (WPT) systems –
Part 3: Specific requirements for the magnetic field wireless power transfer
systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 43.120 ISBN 978-2-8322-6675-5

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

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC TS 61980-3:2019  IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 9

4 Abbreviations ................................................................................................................ 13

4 Symbols and abbreviated terms ..................................................................................... 13

5 General ......................................................................................................................... 13

6 Classification ................................................................................................................. 13

7 Interoperability .............................................................................................................. 15

7 System infrastructure requirements ............................................................................... 15

8 General systems requirements ...................................................................................... 24

9 Communication .............................................................................................................. 24

10 Protection against electric shock ................................................................................... 24

11 Specific requirements for WPT systems ......................................................................... 25

12 Power cable assembly requirements .............................................................................. 26

13 Constructional requirements .......................................................................................... 27

14 Strength of materials and parts ...................................................................................... 27

15 Service and test conditions ............................................................................................ 28

16 Electromagnetic compatibility (EMC) ............................................................................. 28

17 Marking and instructions ................................................................................................ 28

101 Test procedure .............................................................................................................. 28

Annex AA (informative) DD reference EV power circuit (EVPC) for MF-WPT1, MF-

WPT2 and MF-WPT3 ........................................................................................................... 37

Annex BB (informative) Circular reference EV power circuit (EVPC) for MF-WPT1,

MF-WPT2 and MF-WPT3 ...................................................................................................... 54

Annex CC (informative) Heavy-duty magnetic field WPT ...................................................... 73

Annex DD (informative) Coil position in parking spot ............................................................ 79

Annex EE (informative) Description for system interoperability ............................................. 80

Bibliography ........................................................................................................................ 107

Figure 101 – Flush mounted ................................................................................................. 11

Figure 102 – Surface mounted .............................................................................................. 12

Figure 103 – Components of an MF-WPT system ................................................................. 16

Figure 104 – Control loop of WPT system ............................................................................. 21

Figure 105 – Illustration of test positions ............................................................................... 30

Figure AA.1 – Mechanical dimensions of the MF-WPT1/Z1 DD reference secondary

device ................................................................................................................................... 38

Figure AA.2 – Schematic of the EV power electronics for the MF-WPT1/Z1 DD

reference EVPC .................................................................................................................... 39

Figure AA.3 – Mechanical dimensions of the MF-WPT1/Z2 DD reference secondary

device ................................................................................................................................... 40

---------------------- Page: 4 ----------------------
IEC TS 61980-3:2019  IEC 2019 – 3 –
Figure AA.4 – Schematic of the EV power electronics for the MF-WPT1/Z2 DD

reference EVPC .................................................................................................................... 41

Figure AA.5 – Mechanical dimensions of the MF-WPT2/Z1 DD reference secondary

device ................................................................................................................................... 42

Figure AA.6 – Schematic of the EV power electronics for the MF-WPT2/Z1 DD

reference EVPC .................................................................................................................... 43

Figure AA.7 – Mechanical dimensions of the MF-WPT2/Z2 DD reference secondary

device ................................................................................................................................... 44

Figure AA.8 – Schematic of the EV power electronics for the MF-WPT2/Z2 DD

reference EVPC .................................................................................................................... 45

Figure AA.9 – Mechanical dimensions of the MF-WPT2/Z3 DD reference secondary

device ................................................................................................................................... 46

Figure AA.10 – Schematic of the EV power electronics for the MF-WPT2/Z3 DD

reference EVPC .................................................................................................................... 47

Figure AA.11 – Mechanical dimensions of the MF-WPT3/Z1 DD reference secondary

device ................................................................................................................................... 48

Figure AA.12 – Schematic of the EV power electronics for the MF-WPT3/Z1 DD

reference EVPC .................................................................................................................... 49

Figure AA.13 – Mechanical dimensions of the MF-WPT3/Z2 DD reference secondary

device ................................................................................................................................... 50

Figure AA.14 – Schematic of the EV power electronics for the MF-WPT3/Z2 DD

reference EVPC .................................................................................................................... 51

Figure AA.15 – Mechanical dimensions of the MF-WPT3/Z3 DD reference secondary

device ................................................................................................................................... 52

Figure AA.16 – Schematic of the EV power electronics for the MF-WPT3/Z3 DD

reference EVPC .................................................................................................................... 53

Figure BB.1 – Mechanical dimensions of the MF-WPT1/Z1 circular reference

secondary device .................................................................................................................. 55

Figure BB.2 – Schematic of the EV power electronics for the MF-WPT1/Z1 circular

reference EVPC .................................................................................................................... 56

Figure BB.3 – Mechanical dimensions of the MF-WPT1/Z2 circular reference

secondary device .................................................................................................................. 57

Figure BB.4– Schematic of the EV power electronics for the MF-WPT1/Z2 circular

reference EVPC .................................................................................................................... 58

Figure BB.5 – Mechanical dimensions of the MF-WPT1/Z3 circular reference

secondary device .................................................................................................................. 59

Figure BB.6 – Schematic of the EV power electronics for the MF-WPT1/Z3 circular

reference EVPC .................................................................................................................... 59

Figure BB.7 – Mechanical dimensions of the MF-WPT2/Z1 circular reference secondary

device ................................................................................................................................... 61

Figure BB.8 – Schematic of the EV power electronics for the MF-WPT2/Z1 circular

reference EVPC .................................................................................................................... 62

Figure BB.9 – Mechanical dimensions of the MF-WPT2/Z2 circular reference secondary

device ................................................................................................................................... 63

Figure BB.10 – Schematic of the EV power electronics for the MF-WPT2/Z2 circular

reference EVPC .................................................................................................................... 64

Figure BB.11– Mechanical dimensions of the MF-WPT2/Z3 circular reference

secondary device .................................................................................................................. 65

Figure BB.12 – Schematic of the EV power electronics for the MF-WPT2/Z3 circular

reference EVPC .................................................................................................................... 66

---------------------- Page: 5 ----------------------
– 4 – IEC TS 61980-3:2019  IEC 2019
Figure BB.13 – Mechanical dimensions of the MF-WPT3/Z1 circular reference

secondary device .................................................................................................................. 67

Figure BB.14 – Schematic of the EV power electronics for the MF-WPT3/Z1 circular

reference EVPC .................................................................................................................... 68

Figure BB.15 – Mechanical dimensions of the MF-WPT3/Z2 circular reference

secondary device .................................................................................................................. 69

Figure BB.16 – Schematic of the EV power electronics for the MF-WPT2/Z2 circular

reference EVPC .................................................................................................................... 70

Figure BB.17 – Mechanical dimensions of the MF-WPT3/Z3 circular reference

secondary device .................................................................................................................. 71

Figure BB.18– Schematic of the EV power electronics for the MF-WPT3/Z3 circular

reference EVPC .................................................................................................................... 72

Figure CC.1 – Mechanical dimensions of the MF-WPT5 heavy-duty WPT reference

primary device ...................................................................................................................... 75

Figure CC.2 – Schematic of supply power electronics for the heavy-duty WPT

reference primary device ...................................................................................................... 76

Figure CC.3 – Mechanical dimensions of the MF-WPT5 heavy-duty WPT reference

secondary device .................................................................................................................. 77

Figure CC.4 – Schematic of the EV power electronics for the MF-WPT5 heavy-duty

WPT secondary reference device .......................................................................................... 78

Figure DD.1 – Coil position in parking spot ........................................................................... 79

Figure EE.1 – General schematic of the concept showing the coil system and the ports

at which the parameters are defined ..................................................................................... 81

Figure EE.2 – Example of GA impedance zone with stimulationi results for different

reference primary devices and secondary devices ................................................................ 89

Figure EE.3 – Schematic to explain impedance ..................................................................... 91

Figure EE.4 – Behaviour of the reflected impedance ............................................................. 92

Figure EE.5 – Position of measurement points ...................................................................... 95

Figure EE.6 – Coaxial gauge device ..................................................................................... 97

Figure EE.7 – Transversal gauge device ............................................................................... 99

Figure EE.8 – Design of winding for the transversal gauge device ...................................... 100

Figure EE.9 – Exemplary test bench setup for secondary interoperability tests ................... 101

Figure EE.10 – Exemplary test bench setup for primary device interoperability tests ........... 103

Figure EE.11 – Test set-up for electric interoperability design testing ................................. 105

Figure EE.12 –Test set-up for electric interoperability design testing .................................. 105

---------------------- Page: 6 ----------------------
IEC TS 61980-3:2019  IEC 2019 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC VEHICLE WIRELESS POWER TRANSFER (WPT) SYSTEMS –
Part 3: Specific requirements for the magnetic field wireless power
transfer systems
FOREWORD

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

The main task of IEC technical committees is to prepare International Standards. In

exceptional circumstances, a technical committee may propose the publication of a technical

specification when

• the required support cannot be obtained for the publication of an International Standard,

despite repeated efforts, or

• the subject is still under technical development or where, for any other reason, there is the

future but no immediate possibility of an agreement on an International Standard.

Technical specifications are subject to review within three years of publication to decide

whether they can be transformed into International Standards.

IEC TS 61980-3, which is a Technical Specification, has been prepared by IEC technical

committee 69: Electric road vehicles and electric industrial trucks.
---------------------- Page: 7 ----------------------
– 6 – IEC TS 61980-3:2019  IEC 2019
The text of this Technical Specification is based on the following documents:
Draft TS Report on voting
69/554A/DTS 69/616B/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 of the IEC 61980 series, published under the general title Electric vehicle

wireless power transfer (WPT) systems, can be found on the IEC website.
This part is to be used in conjunction with IEC 61980-1:2015.

The clauses of the particular requirements in this document supplement or modify the

corresponding clauses in IEC 61980-1:2015. Where the text indicates an "addition" to or a

"replacement" of the relevant requirement, test specification or explanation of

IEC 61980-1:2015, these changes are made to the relevant text of IEC 61980-1:2015, which

then becomes part of the standard. Where no change is necessary, the words "Clause xx of

IEC 61980-1:2015 is applicable" are used. Additional items to those of IEC 61980-1:2015 are

numbered starting 101. Additional annexes are lettered from AA onwards.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://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 publication 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.
---------------------- Page: 8 ----------------------
IEC TS 61980-3:2019  IEC 2019 – 7 –
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);

– IEC TS 61980-2 covers specific requirements for communication between electric road

vehicle (EV) and wireless power transfer (WPT) systems including general background

and definitions.

– IEC TS 61980-3 covers specific requirements for electric road vehicle (EV) magnetic field

wireless power transfer (MF-WPT) systems including general background and definitions

(e.g. efficiency, electrical safety, EMC).

The requirements described in IEC 61980-1 are general. The technical requirements for the

various wireless power transfer (WPT) technologies are very different; they are specified in

the technology specific parts of the IEC 61980 series. A list of possible WPT technologies is

listed in IEC 61980-1. The requirements for magnetic field wireless power transfer systems

(MF-WPT) are described in this document. Further parts of the IEC 61980 series will describe

other technologies such as power transfer via electric field (EF-WPT) or via electromagnetic

field wireless power transfer systems (EF-WPT) or electromagnetic field-WPT systems, also

named microwave-WPT systems (MW-WPT).

Reference to "technology specific parts" always refers to each parts of the IEC 61980 series.

The structure of the "technology specific parts" follows the structure of IEC 61980-1.

WPT systems are still under development. For this reason, there is the future but not

immediate possibility of an agreement to publish an International Standard. The committee

has decided, by following the procedure set out in ISO/IEC Directives part 1:2018, 2.3, that

the publication of a Technical Specification is appropriate. The reason for publishing the

Technical Specification is a high market need for a first basic technical description.

IEC TS 61980-2, also published as a Technical Specification for the same reason as

IEC TS 61980-3, deals with communication and for this reason has an independent structure.

The numbering of the clauses does not follow the numbering of the other parts of the

IEC 61980 series.
The electric road vehicles (EV) requirements of the MF-WPT system are covered by
ISO PAS 19363.
---------------------- Page: 9 ----------------------
– 8 – IEC TS 61980-3:2019  IEC 2019
ELECTRIC VEHICLE WIRELESS POWER TRANSFER (WPT) SYSTEMS –
Part 3: Specific requirements for the magnetic field wireless power
transfer systems
1 Scope

This part of IEC 61980, which is a Technical Specification, applies to the equipment for the

magnetic field wireless power transfer (MF-WPT) of electric power from the supply network 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 voltages ratings per IEC 60038 up to 1 000 V AC and up to

1 500 V DC The power transfer takes place while the electric vehicle (EV) is stationary.

This document also applies to MF-WPT equipment supplied from on-site storage systems (e.g.

buffer batteries) at standard supply voltages ratings per IEC 60038 up to 1 000 V AC and up

to 1 500 V DC.
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 two- and three-wheel vehicles,
– requirements for MF-WPT systems supplying power to EVs in motion, and
– requirements for bidirectional power transfer.
This standard 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 60947-2, Low-voltage switchgear and controlgear – Part 2: Circuit-breakers

IEC 61008-1, Residual current operated circuit-breakers without integral overcurrent

protection for household and similar uses (RCCBs) – Part 1: General rules
---------------------- Page: 10 ----------------------
IEC TS 61980-3:2019  IEC 2019 – 9 –

IEC 61009-1, Residual current operated circuit-breakers with integral overcurrent protection

for household and similar uses (RCBOs) – Part 1: General rules

IEC TS 61980-2:2019, Electric vehicle wireless power transfer (WPT) systems – Part 2:

Specific requirements for communication between electric road vehicle (EV) and infrastructure

with respect to wireless power transfer (WPT) systems

IEC 62423, Type F and type B residual current operated circuit-breakers with and without

integral overcurrent protection for household and similar uses
DIN 7405:1963, Wire staple 24/6 for office-staplers

EN 10130, Cold rolled low carbon steel flat products for cold forming – Technical delivery

...

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