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???
06/01/07 06:56
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#140137 - it all depends on the dimensions...
Responding to: ???'s previous message
... you have available. But, generally, it's perhaps better to forget about planar coils at once, unless you are talking about some ones or tens of microamps or so (that's the order of magnitude of power with the RFIDs - and many of them use "normal" coils anyway)...

And, of course, the amount and shape of ferromagnetic materials around will also play its role.

JW


List of 18 messages in thread
TopicAuthorDate
What do you know about inductive power coupling?            01/01/70 00:00      
   I recall....            01/01/70 00:00      
      ehum... isn't this a transformer?            01/01/70 00:00      
         Yes            01/01/70 00:00      
            Yahoo Nixies            01/01/70 00:00      
   Solar cells            01/01/70 00:00      
      Yeah transformers are a bit expensive            01/01/70 00:00      
         Lumpy ?            01/01/70 00:00      
            Its an inch diameter            01/01/70 00:00      
               nah.            01/01/70 00:00      
               it all depends on the dimensions...            01/01/70 00:00      
                  if you can get to the end of the shaft ...            01/01/70 00:00      
                     Zero speed            01/01/70 00:00      
         brushless exciters??            01/01/70 00:00      
   Avoid saturation            01/01/70 00:00      
   why not look at RFID            01/01/70 00:00      
   Spin speed            01/01/70 00:00      
   Try Electric Cordless Toothbrushes            01/01/70 00:00      

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