Charger with two coils for wireless charging

A system of a power device and a portable device for wireless charging of a battery of the portable device, which power device comprises a first antenna to emit a magnetic field and which portable device comprises a portable antenna exposed to the magnetic field and connected to a charge stage to re...

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Bibliographic Details
Main Author Ellwood, Stephen
Format Patent
LanguageEnglish
Published 10.09.2024
Subjects
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
SYSTEMS FOR STORING ELECTRIC ENERGY
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Summary:A system of a power device and a portable device for wireless charging of a battery of the portable device, which power device comprises a first antenna to emit a magnetic field and which portable device comprises a portable antenna exposed to the magnetic field and connected to a charge stage to rectify an antenna signal from the portable antenna and to provide a charge voltage (UI) to charge the battery wherein the power device comprises a second antenna realized identical as the first antenna and arranged in a distance (L) to the first antenna and on the same coil axis (A) as the first antenna to generate a Helmholtz magnetic field and wherein a first power amplifier directly connected to the first antenna and a second power amplifier directly connected to the second antenna are realized identical and on the same substrate.
Bibliography:Application Number: US202218291490