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Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All
Wireless Charging SystemWireless Charging System
Seung-ok LimSeung-ok Lim
TTATTA
Document No:
GSC16-PLEN-31
Source: TTA
Contact: Seung-ok LIM
GSC Session:
PLENARY
Agenda Item:
6.13
Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All
GSC16-PLEN-31
Wireless Charging SystemWireless Charging System• Transfer electric power to mobile nearby devices (less than several meters)
and charge batteries
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Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All
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Technical TrendsTechnical Trends
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WiTricity-Haire WiTricity, a spin-off company
from MIT Power transfer to Full HD TV
in CES 2010
Intel 12W power transfer to
netbook in 3feet Receiver coils in the cover of
netbook Independent standardization
activity on 100W wireless power transfer
Sony Power transfer to 22 LCD TV
60W Efficiency: about 80% @
50cm Charging distance increases
by repeaters
Qualcomm Announcement of eZone, a
wireless power transfer system, in CES2009
Maximum supportable devices: 2 Maximum charging distance: 0.2m
Qualcomm-WiPower Takeover WiPower in 2010 for
developing a wireless power transfer system
Developing power transfer system in vehicles
Charging distance: 0.05m
Fujitsu Simultaneous charging to two
mobile phones in Sep. 2010 Development of a simulator which
is used for analysis of magnetic fields between multiple coils
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Highlight of Current ActivitiesHighlight of Current Activities• TTA PG 709 (Wireless Charging and Application)
– Established in Mar. 2011– Scope:
Standard roadmap Power transfer interface Control mechanism
– 12 members
- Service & Structure- Service & Structure -Evaluation
-Evaluation-Interface-Interface
TTA PG709
Steering Committee
WG 1 WG 2 WG 3
Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All
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Strategic DirectionStrategic Direction• Market Analysis – Strong needs
− 16 billion dollars expected in 2014 (Isuppli 2010)
• TTA’s plans− Use case & service scenario (4Q in 2011)− Standard
Wireless Charging protocol (1Q in 2012) Wireless Charging interface (1Q in 2012) Transfer efficiency and measurement (4Q in
2012)
• Collaboration− Cooperation and the sharing of information with
SDOs
Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All
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Overview of Wireless Charging SystemOverview of Wireless Charging System• Wireless Charging System
– How to transfer power and charge efficiently– Devices which have a battery
• Wireless Power Transfer System– How to transfer power efficiently– All electric devices
• Difference from cable chargers– Elimination of complicated wire cables– Safety from electric shock– Increased mobility– Relatively low efficiency (about 90% efficiency of cable chargers)
• Considered frequency bands– 20~60 kHz – 80~370 kHz– 6.78, 13.56 MHz
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ChallengesChallenges• Product Diversification
– As market is increasing, each vendor makes the Wireless Charging system which has different structure & protocol
– Wireless Charging is possible only between systems having the same structure & protocol
• Frequency Issues– Each vendor considers different frequency bands for Wireless
Charging which disables interoperability between Wireless Charging systems
• Regulation Issues– Each nation has different regulation for EMI/EMC, SAR, etc.
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Next Steps / ActionsNext Steps / Actions• Standardization Activities for product diversification
– System & interface– Control & management protocol– Conformance test & certification
• Regulation Coordination & Compromise– Frequency band– EMI/EMC– SAR
• Activities toward the global harmonization– Cooperation with other SDOs– Investigation of the similar activities and directions in other
organizations