WIRELESS POWER TRANSFER USING A FIELD ALTERING CIRCUIT
First Claim
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1. A wireless power transmitter, comprising:
- a power transmit coil configured to generate a magnetic field for wirelessly coupling charging power to one or more receiver devices, the magnetic field having a magnetic field distribution over an area defining a charging region;
a circuit configured to alter the magnetic field generated by the power transmit coil to alter the magnetic field distribution; and
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a controller operably coupled to the circuit, the controller configured to control the circuit to alter the magnetic field distribution responsive to a detected characteristic of the one or more receiver devices.
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Abstract
A wireless power transmitter includes a power transmit coil configured to generate a magnetic field for wirelessly coupling charging power to one or more receiver devices, the magnetic field having a magnetic field distribution over an area defining a charging region, a circuit configured to alter the magnetic field generated by the power transmit coil to alter the magnetic field distribution, and a controller operably coupled to the circuit, the controller configured to control the circuit to alter the magnetic field distribution responsive to a detected characteristic of the one or more receiver devices.
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Citations
32 Claims
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1. A wireless power transmitter, comprising:
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a power transmit coil configured to generate a magnetic field for wirelessly coupling charging power to one or more receiver devices, the magnetic field having a magnetic field distribution over an area defining a charging region; a circuit configured to alter the magnetic field generated by the power transmit coil to alter the magnetic field distribution; and
;a controller operably coupled to the circuit, the controller configured to control the circuit to alter the magnetic field distribution responsive to a detected characteristic of the one or more receiver devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device for generating a magnetic field having a magnetic field distribution over an area defining a charging region for wirelessly charging or powering one or more receiver devices, comprising:
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means for detecting a characteristic of one or more receiver devices indicative of an amount or efficiency of wirelessly coupling charging power via the magnetic field generated by the device; and means for altering the magnetic field to alter the magnetic field distribution within the charging region in response to the detecting means. - View Dependent Claims (13, 14, 15, 16)
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17. A method of operating a wireless power transmitter apparatus configured to generate a magnetic field having a magnetic field distribution over an area defining a charging region for wirelessly charging or powering one or more receiver devices, the method comprising:
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detecting a characteristic of one or more receiver devices indicative of an amount or efficiency of wirelessly coupling charging power via the magnetic field generated by the wireless power transmitter apparatus; and altering the magnetic field to alter the magnetic field distribution within the charging region in response to detecting the characteristic. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An apparatus for wireless power transfer, comprising:
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a housing having a surface configured for direct or indirect placement of one or more receiver devices, the surface defining a charging region for wirelessly charging the one or more receiver devices; a power transmit coil configured to generate a magnetic field within the charging region for wirelessly coupling charging power to the one or more receiver devices, the magnetic field having a magnetic field distribution within the charging region; and a circuit configured to alter the magnetic field generated by the power transmit coil to alter the magnetic field distribution within the charging region. - View Dependent Claims (29, 30, 31, 32)
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Specification