Wireless charging mats for portable electronic devices

Embodiments describe a wireless charging device including a housing having a charging surface and first and second walls defining an interior cavity, and a transmitter coil arrangement disposed within the interior cavity and configured to generate a time-varying magnetic flux and an electric field d...

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Bibliographische Detailangaben
Hauptverfasser:	Graham, Christopher S, Kowalski, Stefan A, Larsson, Karl Ruben F, Haug, Grant S, Jol, Eric S, Kasar, Darshan R, Thompson, Paul J, Karanikos, Demetrios B
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERATION INDUCTANCES MAGNETS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS PRINTED CIRCUITS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SYSTEMS FOR STORING ELECTRIC ENERGY TRANSFORMERS TRANSMISSION
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Beschreibung
Zusammenfassung:	Embodiments describe a wireless charging device including a housing having a charging surface and first and second walls defining an interior cavity, and a transmitter coil arrangement disposed within the interior cavity and configured to generate a time-varying magnetic flux and an electric field during wireless power transfer, where each of the plurality of transmitter coils has a central axis positioned a lateral distance away from the central axes of all other transmitter coils of the plurality of transmitter coils. The wireless charging mat also includes an electromagnetic shield positioned between the transmitter coil arrangement and the first wall, an interconnection structure positioned within the interior cavity between the transmitter coil arrangement and the second wall, and a ferromagnetic shield positioned within the interior cavity between the transmitter coil arrangement and the interconnection structure, the ferromagnetic shield is configured to redirect the magnetic flux away from the interconnection structure.