AUTOMATICALLY-ALIGNING MAGNETIC FIELD SYSTEM
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United States of America Patent
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Issued Date -
Jul 25, 2024
app pub date -
Apr 5, 2024
filing date -
Nov 4, 2020
priority date (Note) -
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Abstract
A wireless power transfer device includes a first transmitting coil oriented along a first axis; a second transmitting coil on the first transmitting coil and oriented along a second axis perpendicular to the first axis; a nonmagnetic material magnetically decoupling the first transmitting coil from the second transmitting coil in an area of overlap between the first and second transmitting coils; and a driver configured to provide first and second equal currents to the first and second transmitting coils, respectively, to generate a rotating magnetic field, the driver being configured to provide the first and second currents to have equal frequencies, substantially equal amplitudes, and a phase difference of substantially 90 degrees.
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