Multi-dimensional inductive charger and applications thereof

  • US 9,112,364 B2
  • Filed: 12/10/2012
  • Issued: 08/18/2015
  • Est. Priority Date: 01/18/2011
  • Status: Active Grant
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First Claim
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1. A multi-dimensional inductive charger, comprising:

  • a base unit having one or more transmitter coils which transmit inductive power to a receiver coil placed close to the one or more transmitter coils and configured to receive power therefrom;

    a switching layer having magnetic properties and covering the one or more transmitter coils, so that, during charging or powering of a device or battery having the receiver coil, the switching layer is layered between the one or more transmitter coils and a surface of the base unit,wherein one or more components are used to modify one or both the magnitude or phase of an electromagnetic field in one or multiple dimensions, includingwherein the switching layer'"'"'s magnetic properties can be locally modified, by the receiver coil or by a switching magnet associated with the receiver coil, to affect passage of a magnetic flux within a particular region of the switching layer proximate the coils, andwherein, when the device or battery having a receiver and the receiver coil is placed close to the base unit having the one or more transmitter coils, the switching layer'"'"'s magnetic properties are locally modified, by the magnetic field of the coils or the switching magnet associated with the receiver coil, to guide the magnetic flux to provide localized power transfer in the particular region of the layer generally aligned both with the one or more transmitter coils and the receiver coil; and

    wherein, when a mobile device having one or more receiver coils or receivers associated therewith, is placed in proximity to the base unit, the one or more transmitter coils are used to inductively generate a current in the receiver coil or receiver associated with the mobile device, to charge or power the mobile device.

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