Automatically-aligning magnetic field system
AssigneeAlfred E. Mann Foundation for Scientific Research
InventorsBrian R. Dearden, Justin Cheng-Tsu Loo
Life of this patent
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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 different from 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 separately provide first and second currents to the first and second transmitting coils, respectively, to generate a magnetic field.
Claims20
A wireless power transfer device comprising:
- a first transmitting coil oriented along a first axis;
- a second transmitting coil on the first transmitting coil and oriented along a second axis different from 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 separately provide first and second currents to the first and second transmitting coils, respectively, to generate a magnetic field.
A method of transmitting power to an electronic device, the method comprising:
- generating a magnetic field by separately driving, with AC current provided by a driver:
- a first transmitting coil of a wireless power transfer device oriented along a first axis, and
- a second transmitting coil of the wireless power transfer device on the first transmitting coil and oriented along a second axis different from the first axis, a nonmagnetic material magnetically decoupling the second transmitting coil from the first transmitting coil being in an area of overlap between the first and second transmitting coils.
A wireless power transfer device, comprising:
- a first transmitting coil oriented along a first axis;
- a second transmitting coil above the first transmitting coil, overlapping the first transmitting coil, oriented along a second axis crossing the first axis, and magnetically decoupled from the first transmitting coil;
- a driver configured to separately provide first and second currents to the first and second transmitting coils, respectively, to generate a magnetic field.
Dependencies are inferred from the claim text.