METHOD OF WIRELESSLY TRANSFERRING POWER
First Claim
1. A wireless power transfer device comprising:
- a first power amplifier configured to generate a first drive signal;
a first transmitter coil electrically coupled to the first power amplifier, and configured to generate a first magnetic field having a first magnitude in response to receiving the first drive signal;
a second power amplifier configured to generate a second drive signal;
a second transmitter coil electrically coupled to the second power amplifier, and configured to generate a second magnetic field having a second magnitude in response to receiving the second drive signal; and
a repeater coil magnetically coupled to the first transmitter coil and the second transmitter coil, and configured to generate a third magnetic field having a third magnitude, wherein the third magnitude is greater than the first magnitude and is also greater than the second magnitude, the repeater coil configured to magnetically transfer power to an external device.
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Accused Products
Abstract
A wireless power transfer device including a first power amplifier configured to generate a first drive signal, a second power amplifier configured to generate a second drive signal, a first transmitter coil configured to generate a first magnetic field having a first magnitude in response to receiving the first drive signal, and a second transmitter coil configured to generate a second magnetic field having a second magnitude in response to receiving the second drive signal. The wireless power transfer device also includes a repeater coil magnetically coupled to the first transmitter coil and the second transmitter coil, and configured to generate a third magnetic field having a third magnitude. The third magnitude is greater than the first magnitude and greater than the second magnitude. The repeater coil is configured to magnetically transfer power to an external device.
34 Citations
25 Claims
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1. A wireless power transfer device comprising:
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a first power amplifier configured to generate a first drive signal; a first transmitter coil electrically coupled to the first power amplifier, and configured to generate a first magnetic field having a first magnitude in response to receiving the first drive signal; a second power amplifier configured to generate a second drive signal; a second transmitter coil electrically coupled to the second power amplifier, and configured to generate a second magnetic field having a second magnitude in response to receiving the second drive signal; and a repeater coil magnetically coupled to the first transmitter coil and the second transmitter coil, and configured to generate a third magnetic field having a third magnitude, wherein the third magnitude is greater than the first magnitude and is also greater than the second magnitude, the repeater coil configured to magnetically transfer power to an external device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of wirelessly transferring power with a wireless power transfer device having a first transmitter coil, a second transmitter coil, and a repeater coil, the method comprising:
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electrically coupling a first power amplifier to the first transmitter coil; generating a first drive signal with the first power amplifier; electrically coupling a second power amplifier to the second transmitter coil; generating a second drive signal with the second power amplifier; generating, with the first transmitter coil, a first magnetic field having a first magnitude in response to receiving the first drive signal; generating, with the second transmitter coil, a second magnetic field having a second magnitude in response to receiving the second drive signal; magnetically coupling the first transmitter coil and the second transmitter coil with a repeater coil; and generating, with the repeater coil, a third magnetic field having a third magnitude, wherein the third magnitude is greater than the first magnitude and is also greater than the second magnitude. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A wireless power transfer system comprising:
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a wireless power transfer device including; a wireless power transfer array having; a first plurality of power amplifiers configured to generate a first plurality of drive signals, a first plurality of transmitter coils configured to generate a first plurality of magnetic fields, each transmitter coil electrically coupled to one of the first plurality of power amplifiers, each magnetic field being phase aligned to be additively combined with the rest of the first plurality of magnetic fields, and a first repeater coil magnetically coupled to the first plurality of transmitter coils, and configured to additively combine the plurality of magnetic fields from the plurality of transmitter coils, wherein the wireless power transfer device is associated with a predetermined power transfer area and a predetermined power transfer distance; and an external device including a receiver coil magnetically coupled to the first repeater coil and configured to receive wireless power from the wireless power transfer device when the receiver coil is positioned within the predetermined power transfer area and the predetermined power transfer distance. - View Dependent Claims (22, 23, 24, 25)
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Specification