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Wireless electricity

  1. Nov 21, 2013 #1
    What is the difference between magnetic resonance and magnetic induction when it comes to charging devices and other types of wireless electricity. I was doing some research on this but was not able to find a clear answer. If someone could help me with this that would be greatly appreciated.

    With kind regards,
    Ben
     
  2. jcsd
  3. Nov 21, 2013 #2

    Drakkith

    User Avatar

    Staff: Mentor

    Per wiki: http://en.wikipedia.org/wiki/Resonant_inductive_coupling

    The use of resonant inductors allows the two coils (in this case the charging device and the object being charged) to be placed much further apart than non-resonant coupled inductors, which are typically right next to each other or one is inside the other. Note that induction is occurring in both cases. In a non-resonant coil an oscillating current wont be sustained. It will simply die off as soon as you stop applying the power. Current in a resonant coil will continue to oscillate back and forth until resistive and radiative losses use up all the energy.
     
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