IEC 63245-1:2021

IEC 63245-1 ®
Edition 1.0 2021-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Spatial wireless power transfer based on multiple magnetic resonances –
Part 1: Requirements
Transfert d’énergie sans fil dans l’espace reposant sur des résonances
magnétiques multiples –
Partie 1: Exigences
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IEC 63245-1 ®
Edition 1.0 2021-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Spatial wireless power transfer based on multiple magnetic resonances –

Part 1: Requirements
Transfert d’énergie sans fil dans l’espace reposant sur des résonances

magnétiques multiples –
Partie 1: Exigences
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.240.99; 35.200 ISBN 978-2-8322-9470-3

– 2 – IEC 63245-1:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 7
4 Overview of spatial wireless power transfer . 7
5 General requirements . 9
5.1 Requirements on charging zone . 9
5.1.1 Three-dimensional charging zone . 9
5.1.2 Quiet zone . 9
5.1.3 Null point . 10
5.2 Requirements on charging procedure . 11
6 Functional requirements . 12
6.1 Requirements on transmitter coils . 12
6.1.1 Multiple transmitter coils . 12
6.1.2 Location of transmitter coils . 13
6.1.3 Relationship between two transmitter coils . 13
6.1.4 Structure of connecting a pair of transmitter coils . 13
6.2 Requirements on operations related to current . 14
6.2.1 Supplying current. 14
6.2.2 Controlling phase of current . 14
6.3 Requirements on frequency . 15
6.3.1 Adjusting resonance frequency . 15
Bibliography . 16

Figure 1 – Conceptual image of SWPT [IEC 62827-3] . 8
Figure 2 – Conceptual image of SWPT-MMR . 8
Figure 3 – Free positioning of a receiver in a charging zone . 9
Figure 4 – Interaction between transmitter coils for generating a quiet zone . 9
Figure 5 – Interaction between transmitter coils for generating a quiet zone (top view) . 10
Figure 6 – Null points in a charging zone (top view) . 10
Figure 7 – Addressing null points by using two pairs of transmitter coils (top view) . 11
Figure 8 – Basic charging procedure of SWPT-MMR . 12
Figure 9 – Arrangement of transmitter coils . 13
Figure 10 – Example of transmitter coils and a power supplier in an SWPT-MMR
system . 14

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPATIAL WIRELESS POWER TRANSFER
BASED ON MULTIPLE MAGNETIC RESONANCES –

Part 1: Requirements
FOREWORD
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International Standard IEC 63245-1 has been prepared by technical area 15: Wireless power
transfer, of IEC technical committee 100: Audio, video and multimedia systems and equipment.
The text of this International Standard is based on the following documents:
FDIS Report on voting
100/3548/FDIS 100/3564/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 63245 series, published under the general title Spatial wireless
power transfer based on multiple magnetic resonances, can be found on the IEC website.

– 4 – IEC 63245-1:2021 © IEC 2021
The committee has decided that the contents of this document will remain unchanged until the
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