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  • Author Author: Catwell
  • Date Created: 29 Apr 2011 4:34 PM Date Created
  • Views 535 views
  • Likes 0 likes
  • Comments 2 comments
  • dit
  • wireless_power
  • hmi
  • cabeatwell:dit
  • measurement
  • toyota
  • wireless
  • induction
  • power
  • energy
  • witricity
  • innovation
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Magnetic resonance wireless charging

Catwell
Catwell
29 Apr 2011
Wireless power coupling is getting a big push for adoption from a newly announced Toyota and WiTricity partnership. Back in December 2010, I wrote about WiTricity's power coupling via magnetic resonance. As a refresher; unlike traditional magnetic induction, direct contact or even close proximity is not needed with WiTricity's tech. The main benefit of WiTricity's offering is no need for coil alignment or close proximity. One WiTricity charging station, placed on a sidewalk, could charge a whole row of cars. That is a winning feature. The goal of the partnership is to foster widespread use of wireless EV charging stations. The, now, team has stated that this resonating technique is more efficient than electromagnetic-induction charging. The power transfer efficiency still drops with distance, though not as greatly. However some other companies are already offering wireless EV charging options that boast 80% efficiency and more, so Toyota better rush this to market. 
Every month or so, a new technology or announcement in EV technology pushes me ever closer to taking the all electric plunge. Once I see a WiTricity charging station somewhere, It will be time to buy an EV.

Anyone out there with an EV, how easy is charging for you?

Cabe
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  • Catwell
    Catwell over 14 years ago in reply to gervasi

    HP's Touchstone wireless charging base was promised to not only charge but also provide various data services. Too bad they shut their WebOS devices down.

     

    Cabe

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  • gervasi
    gervasi over 14 years ago

    I saw in your earlier article they used 9.9MHz.  I wonder if certain frequencies are better than others.  Path loss is greater at higher frequencies, but it's easier to build highly directional antennas at higher frequencies.  That model is probably worthless for inductive coupling.  I wonder if there's a way to do capacitive coupling, provided RX and TX have access to the same ground.

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