Multi-element portable wireless charging device and method
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United States of America Patent
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Apr 4, 2017
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app pub date -
Jun 9, 2016
filing date -
Jun 9, 2016
priority date (Note) -
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Abstract
The multi-element portable wireless charging device includes a transmitter having a DC power source (battery), an oscillator connected to the battery for converting the DC to AC, a power amplifier connected to the AC output of the oscillator, and at least one flat, planar primary coil connected as a load of the power amplifier circuit. The system also includes a receiver (typically installed in the device requiring recharging) that has a flat, planar secondary coil in which an AC current is induced when placed in close proximity (1-3 cm) to the primary coil, a full-wave bridge rectifier to rectify the AC current to DC, and a voltage regulator connected to the rectifier to provide a steady DC voltage required by the charging circuit to charge the mobile device. Power is transmitted from the transmitter to the receiver by magnetic inductive coupling.
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