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IEC TR 63231
Edition 1.0 2019-08
TECHNICAL
REPORT
colour
inside
Consideration of energy efficiency in wireless power transfer technology
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IEC TR 63231
Edition 1.0 2019-08
TECHNICAL
REPORT
colour
inside
Consideration of energy efficiency in wireless power transfer technology
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.99 33.160.99 ISBN 978-2-8322-7240-4
– 2 – IEC TR 63231:2019 IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 6
4 Overview of the WPT system . 6
4.1 General . 6
4.2 Magnetic induction WPT systems . 7
4.3 Magnetic resonance WPT systems. 7
4.4 Microwave (RF) used in WPT systems . 7
4.5 Capacitive wireless power transfer (CPT). 7
5 WPT product use cases . 7
5.1 General . 7
5.2 Receivers . 8
5.2.1 Smartphones . 8
5.2.2 Smartwatches . 8
5.2.3 Laptops . 8
5.3 Transmitters . 8
5.3.1 Vertical figure product. 8
5.3.2 Car-installed product . 8
5.3.3 Car-mounted product . 9
5.4 Furniture . 9
6 Overview of various organization’s activities including standardization . 9
6.1 General . 9
6.2 National movement . 10
6.2.1 Europe. 10
6.2.2 United States of America . 10
6.2.3 Korea . 10
6.2.4 China . 11
6.2.5 Japan . 11
6.3 SDO movements . 11
6.3.1 Wireless Power Consortium (WPC) . 11
6.3.2 AirFuel Alliance . 11
6.3.3 Consumer Technology Association (CTA) . 11
6.3.4 European Telecommunications Standards Institute (ETSI) . 11
7 Areas to consider . 12
7.1 How to pair WPT Tx and WPT Rx . 12
7.2 Placement of WPT Rx on a WPT Tx charger . 12
7.3 Testing equipment . 12
8 New standard requirements . 12
Annex A (informative) Overview of ANSI/CTA-2042.3, Methods of Measurement for
Power Transfer Efficiency and Standby Power of Wireless Power Systems (CTA) . 13
A.1 Overview. 13
A.2 Power transfer efficiency – use cases . 13
A.3 Power transfer efficiency – test procedure overview . 13
Bibliography . 14
Figure 1 – Example of vertical charging pad. 8
Figure 2 – Example of car-installed product . 8
Figure 3 – Example of car mounted product . 9
Figure 4 – Example of furniture charging product . 9
– 4 – IEC TR 63231:2019 IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONSIDERATION OF ENERGY EFFICIENCY
IN WIRELESS POWER TRANSFER TECHNOLOGY
FOREWORD
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The main task of IEC technical committees is to prepare International Standards. However, a
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data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC TR 63231, which is a technical report, has been prepared by TA15: Wireless Power
Transfer, of IEC technical committee TC 100: Audio, video and multimedia systems and
equipment.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
100/3186/DTR 100/3262/RVDTR
Full information on the voting for the approval of this technical report 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.
The committee has decided that the contents of this document will remain unchanged until the
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the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
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.
– 6 – IEC TR 63231:2019 IEC 2019
CONSIDERATION OF ENERGY EFFICIENCY
IN WIRELESS POWER TRANSFER TECHNOLOGY
1 Scope
This Technical Report (TR) describes the technical background of current energy efficiency
efforts related to wireless power transfer (WPT) technology and commercially availabl
...