WIRELESS POWER TRANSMITTER TUNING
First Claim
1. An apparatus configured to wirelessly provide power to a load, the apparatus comprising:
- a transmit circuit comprising a transmit coil, the transmit circuit being configured to wirelessly provide power to the load, the transmit circuit being further configured to resonate at a resonant frequency, the transmit circuit having a reactance;
a detection circuit configured to detect a change in the resonant frequency while providing power to the load; and
a tuning circuit configured to adjust the reactance based on the change.
1 Assignment
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Accused Products
Abstract
This disclosure provides systems, methods and apparatus for tuning a wireless power transmitter. In one aspect an apparatus configured to wirelessly provide power to a load is provided. The apparatus includes a transmit circuit including a transmit coil. The transmit circuit is configured to wirelessly provide power to the load. The transmit coil is configured to resonate at a resonant frequency. The transmit circuit has a reactance. The apparatus further includes a detection circuit configured to detect a change in the resonant frequency while providing power to the load. The apparatus further includes a tuning circuit configured to adjust the reactance based on the change.
176 Citations
34 Claims
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1. An apparatus configured to wirelessly provide power to a load, the apparatus comprising:
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a transmit circuit comprising a transmit coil, the transmit circuit being configured to wirelessly provide power to the load, the transmit circuit being further configured to resonate at a resonant frequency, the transmit circuit having a reactance; a detection circuit configured to detect a change in the resonant frequency while providing power to the load; and a tuning circuit configured to adjust the reactance based on the change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of tuning a wireless power transmitter, the method comprising:
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detecting a change in a resonant frequency of a transmit circuit comprising a transmit coil of the wireless power transmitter while wirelessly providing power to a first device; and adjusting a tuning reactance of the transmit circuit based on the detection while wirelessly providing power to the first device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus configured to wirelessly provide power to a load, the apparatus comprising:
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means for wirelessly transmitting power to the load, the means for wirelessly transmitting power being configured to resonate at a resonant frequency, the means for wirelessly transmitting power having a reactance; means for detecting a change in the resonant frequency while providing power to the load; and means for tuning configured to adjust the reactance based on the change. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification