Wireless Power Transfer – multiple sources control management

1. Wireless Power Transfer – multiple sources control management 100/AGS501 2012-10-22 H. Sakakihara

2. Background • Multimedia products with wireless power transfer, specially electromagnetic induction technology, are spreading in the market. • Electromagnetic induction • Remove difficulty of connecting power line cable • Request that a power source and a receiver should be put at a short distance in the appropriate position • Magnetic resonance • Give a spatial effect on power transfer • Deliver power from multiple power sources to multiple receivers at a distance in a spatial space.

3. Spatial Wireless Power Transfer System Power source Power source Power source Power source Concept image-2 Concept image-1 • Multiple power sources configure a power transfer area. • When a receiving device enters the power transfer area, its device will be charged automatically.

4. Technical issues • Methods of formation of groups on power transfer areas including multiple power sources • Which power source is responsible for power transfer to each receiving device? • Controlling power transfer conditions among multiple power sources to achieve efficient power transfer to multiple receivers • How can power sources set up the output conditioning on position and posture of receiving devices? Group-1 Group-N ...... Power source ...... Receiving device

5. New work item proposal • Title : Wireless Power Transfer – multiple sources control management • Scope: • This International Standard specifies methods of formation of multiple groups on a spatial wireless power transfer system. A group on spatial wireless power transfer system, which is responsible for power transfer to receiving devices, has multiple power sources. • This International Standard also specifies within a group methods of setting, sharing and controlling power transfer conditions among multiple power sources in order to achieve efficient power transfer to multiple receiving devices. • NP submission: October, 2012

6. System structure z SWPTS-S Slave Master SWPTS: Spatial Wireless Power Transfer System SWPTS-S: SWPTS-Source Slave Master Slave y SWPTS-2 Communication area : Device SWPTS-1 Power transfer area Device-1 x • (1) Multiple sources configure power transfer area of each SWPTS • (2) To deliver power to devices within intersection of power transfer areas, • synchronizing of magnetic field • arrangement on synchronizing of magnetic field based on position and posture of devices • (3) Setting a SWPTS-S as Master (autonomous or user’s assignment) • Master’s optimizing power magnetic field (calculation of matching conditionsand magnetic field strength on SWPTS-Ss) • Optimization on magnetic field to efficiently deliver power to all devices within SWPTS

7. Table of Contents • Scope • Normative References • Terms, definitions and abbreviations • Basic Overview • Requirements on SWPTS • Control and management method on SWPTS • 6.1 Formation of SWPTS-Ss Group • 6.2 Preparation of Wireless power transfer for multiple SWPTS-Ds • 6.3 Wireless power transfer mode • 6.4 Reconfiguration of SWPTS • ： • ：

8. Schedule on proposed NP △10/22 TC100 AGS in Berlin ▲2012/10/13 NP submission △ 2013/1 Closing voting on NP △2013/10 CDV △ 2014/08 IS

9. Thank you for your attention. sakakihara.hiro@jp.fujitsu.com