Method and system for maximum achievable efficiency in near-field coupled wireless power transfer systems
First Claim
1. A method for wireless power transfer, the method comprising:
- configuring, independently of load impedance and source impedance, coil geometry for a transmit (Tx) coil and a receive (Rx) coil based on a media expected to be between the coils during operation;
determining a desired susceptance and conductance corresponding to the configured coil geometry and expected media;
configuring a load impedance for an amplifier for the Tx coil based on the determined susceptance and conductance; and
configuring a load impedance for the Rx coil based on the determined susceptance and conductance.
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Accused Products
Abstract
Methods and systems for maximum efficiency achievable in near-field coupled wireless power transfer systems are disclosed and may include configuring coil geometry, independently of load impedance and source impedance, for a transmit (Tx) coil and a receive (Rx) coil based on a media expected to be between the coils during operation. A desired susceptance and conductance may be determined and an impedance of an amplifier for the Tx coil may be configured based on the determined susceptance and conductance. A load impedance for the Rx coil may be configured based on the determined susceptance and conductance. A matching network may be coupled to the amplifier. The Rx coil may be integrated on a complementary metal-oxide semiconductor (CMOS) chip. One or more matching networks may be integrated on the CMOS chip for the configuring of the load impedance for the Rx coil.
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Citations
30 Claims
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1. A method for wireless power transfer, the method comprising:
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configuring, independently of load impedance and source impedance, coil geometry for a transmit (Tx) coil and a receive (Rx) coil based on a media expected to be between the coils during operation; determining a desired susceptance and conductance corresponding to the configured coil geometry and expected media; configuring a load impedance for an amplifier for the Tx coil based on the determined susceptance and conductance; and configuring a load impedance for the Rx coil based on the determined susceptance and conductance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for wireless power transfer, the system comprising:
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a coil geometry for a transmit (Tx) coil and a receive (Rx) coil configured based on a media expected to be between the coils during operation but configured independent of a load impedance and source impedance; a determined susceptance and conductance corresponding to the configured coil geometry and expected media; a load impedance for an amplifier for the Tx coil, said impedance configured based on the determined susceptance and conductance; and a load impedance configured for the Rx coil based on the determined susceptance and conductance. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A system for wireless power transfer, the system comprising:
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a coil geometry for a transmit (Tx) coil on a printed circuit board and a receive (Rx) coil on a complimentary metal-oxide semiconductor (CMOS) chip, said Tx coil and Rx coil configured based on a biological media expected to be between the coils during operation but configured independent of a configurable load impedance and source impedance, said Rx coil integrated on a chip with the configurable load impedance; a determined susceptance and conductance corresponding to the configured coil geometry and expected media; a load impedance for an amplifier for the Tx coil, said impedance configured based on the determined susceptance and conductance; and a load impedance configured for the Rx coil based on the determined susceptance and conductance.
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Specification