TRANSMITTERS FOR WIRELESS POWER TRANSMISSION
First Claim
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1. A wireless power transmitter, comprising:
- a transmit circuit configured as a resonant tank comprising a first capacitor coupled with a first inductor, the transmit circuit configured to wirelessly transmit power in response to a time-varying signal; and
a driver circuit operably coupled to the transmit circuit, the driver circuit configured to generate the time-varying signal, the driver circuit comprising;
a switch configured to control the time-varying signal in response to a control signal;
a second capacitor coupled in parallel with the switch; and
a second inductor coupled to the switch and the second capacitor.
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Abstract
Exemplary embodiments are directed to wireless power transfer. A wireless power transmitter includes a transmit antenna configured as a resonant tank including a loop inductor and an antenna capacitance. The transmitter further includes an amplifier configured to drive the transmit antenna and a matching circuit operably coupled between the transmit antenna and the amplifier. The transmitter also includes a capacitor integrating the antenna capacitance and a matching circuit capacitance.
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Citations
18 Claims
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1. A wireless power transmitter, comprising:
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a transmit circuit configured as a resonant tank comprising a first capacitor coupled with a first inductor, the transmit circuit configured to wirelessly transmit power in response to a time-varying signal; and a driver circuit operably coupled to the transmit circuit, the driver circuit configured to generate the time-varying signal, the driver circuit comprising; a switch configured to control the time-varying signal in response to a control signal; a second capacitor coupled in parallel with the switch; and a second inductor coupled to the switch and the second capacitor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for transmitting wireless power, comprising:
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transmitting power wirelessly, by a transmit circuit, in response to a time-varying signal, the transmit circuit configured as a resonant tank comprising a first capacitor coupled with a first inductor; and generating, by a driver circuit, the time-varying signal, the driver circuit comprising a switch configured to control the time-varying signal in response to a control signal, a second capacitor coupled in parallel with the switch, and a second inductor coupled to the switch and the second capacitor. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A driver circuit for use in wireless power transfer, comprising:
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means for transmitting power wirelessly in response to a time-varying signal, the means for transmitting comprising means for storing energy in a first electric field coupled with means for storing energy in a first magnetic field; and means for generating the time-varying signal, the means for generating comprising a means for controlling the time-varying signal in response to a control signal, means for storing energy in a second electric field coupled in parallel with the means for controlling, and means for storing energy in a second magnetic field coupled to the means for controlling and the means for storing energy in the second electric field. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification