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BrianRoemmele's profile
Brian Roemmele
Brian Roemmele
Brian Roemmele
@BrianRoemmele

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Brian Roemmele

@BrianRoemmele

we can only see what we think is possible...

transcendence
VoiceFirst.expert
Joined January 2010

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    1. Rene Ritchie‏Verified account @reneritchie 29 Mar 2019
      • Report Tweet

      Rene Ritchie Retweeted Matthew Panzarino

      RIP :(https://twitter.com/panzer/status/1111708373546758144 …

      Rene Ritchie added,

      Matthew PanzarinoVerified account @panzer
      Apple cancels AirPower product, citing inability to meet its high standards for hardware https://techcrunch.com/2019/03/29/apple-cancels-airpower-product-citing-inability-to-meet-its-high-standards-for-hardware/ …
      Show this thread
      24 replies 16 retweets 131 likes
    2. Brian Roemmele‏ @BrianRoemmele 29 Mar 2019
      • Report Tweet
      Replying to @reneritchie

      Rene, a bold move. A thing I learned experimenting in my garage lab with inductive charging is the shape of the wave form and the way the pulse is timed over a duty cycle. I am no battery expert, just some guy, but this solves many temperature gradient issues I have come across.

      1 reply 1 retweet 3 likes
    3. Brian Roemmele‏ @BrianRoemmele 29 Mar 2019
      • Report Tweet
      Replying to @BrianRoemmele @reneritchie

      Rene, Thus with 3 inductive coils, one can sequence the pulses in a pattern that adjusts to the type of device on the coils. The wave form should also be shaped over the cycle and also for each type of battery that is charged. You can not have 3 coils active at the same interval.

      0 replies 0 retweets 3 likes
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    5. Uluroo‏ @UlurooSpeaks 29 Mar 2019
      • Report Tweet
      Replying to @redhotnerd @BrianRoemmele @reneritchie

      AirPower didn't just have three coils, it had 21 to 24, and many of them had to overlap three-coiled chargers exist and work fine; the thing Apple tried to do was eliminate dead zones where no power was available

      10 replies 25 retweets 123 likes
    6. Nigeth‏ @Nigeth 29 Mar 2019
      • Report Tweet
      Replying to @UlurooSpeaks @timohetzel and

      For a technology with an average efficiency of 60% and which produces a significant amount of excess heat per coil if you want 20 W of output power.

      1 reply 0 retweets 3 likes
      Brian Roemmele‏ @BrianRoemmele 29 Mar 2019
      • Report Tweet
      Replying to @Nigeth @UlurooSpeaks and

      Nigeth, indeed! This is why it made more sense to have larger coils with a sequential and wave shaped charge cycle. Easy to control the gradients in this environment then with +3x. Each coil would adjust to the device and ambient temperature. Hard to do with so many coils.

      1:25 PM - 29 Mar 2019
      • 1 Like
      • John Lamarde
      0 replies 0 retweets 1 like

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