Wireless Charging System

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					                                 Document No:   GSC16-PLEN-31
                                 Source:        TTA

                                 Contact:       Seung-ok LIM

                                 GSC Session:   PLENARY

                                 Agenda Item:   6.13




                   Wireless Charging System

                               Seung-ok Lim
                                   TTA



Halifax, 31 Oct – 3 Nov 2011        ICT Accessibility For All
                                                                          GSC16-PLEN-31



               Wireless Charging System
    •   Transfer electric power to mobile nearby devices (less than several meters)
        and charge batteries




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                                   Technical Trends
                                                      Qualcomm
   WiTricity-Haire
                                                        Announcement of eZone, a
     WiTricity, a spin-off company
                                                         wireless power transfer system, in
      from MIT                                           CES2009
     Power transfer to Full HD TV
                                                        Maximum supportable devices: 2
      in CES 2010
                                                        Maximum charging distance: 0.2m

   Intel                                             Qualcomm-WiPower
     12W power transfer to                             Takeover WiPower in 2010 for
       netbook in 3feet                                  developing a wireless power
     Receiver coils in the cover of                     transfer system
       netbook                                          Developing power transfer system

     Independent standardization                        in vehicles
       activity on 100W wireless                        Charging distance: 0.05m
       power transfer
   Sony                                              Fujitsu
     Power transfer to 22 LCD TV                       Simultaneous charging to two
      60W                                                mobile phones in Sep. 2010
     Efficiency: about 80% @                           Development of a simulator which
      50cm                                               is used for analysis of magnetic
     Charging distance increases                        fields between multiple coils
      by repeaters




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         Highlight of Current Activities
    • TTA PG 709 (Wireless Charging and Application)
          – Established in Mar. 2011
          – Scope:
                 Standard roadmap
                 Power transfer interface
                 Control mechanism
          – 12 members
                                             TTA PG709

                                            Steering Committee

                               WG 1                  WG 2                         WG 3
                    - Service & Structure   -Interface                  -Evaluation




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                               Strategic 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
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       Overview 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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                               Challenges
    • 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 / 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

Halifax, 31 Oct – 3 Nov 2011        ICT Accessibility For All                       8

				
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