Transmitters for wireless power transmission
First Claim
Patent Images
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 second inductor coupled in series with the transmit circuit; and
a second capacitor coupled in series with the second inductor and the transmit circuit;
wherein the second inductor and the first capacitor define a filter configured to provide load matching and/or filtering of a signal generated by the driver or the transmit circuit.
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
21 Claims
-
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 second inductor coupled in series with the transmit circuit; and a second capacitor coupled in series with the second inductor and the transmit circuit; wherein the second inductor and the first capacitor define a filter configured to provide load matching and/or filtering of a signal generated by the driver or the transmit circuit. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for transmitting wireless power, comprising:
-
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; generating, by a driver circuit, the time-varying signal, the driver circuit comprising a second inductor coupled in series with the transmit circuit, and a second capacitor coupled in series with the second inductor and the transmit circuit; and matching and/or filtering the time-varying signal by a filter comprising the second inductor and the first capacitor. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A driver circuit for use in wireless power transmitter, comprising:
-
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 means for storing energy in a second electric field coupled in series with the means for transmitting power, and means for storing energy in a second magnetic field coupled in series with the means for transmitting power and the means for storing energy in a second electric field; wherein the means for storing energy in a second magnetic field and the means for storing energy in a first electric field define a means for filtering which provides load matching and/or filtering of the time-varying signal. - View Dependent Claims (14, 15, 16, 17, 18)
-
-
19. 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 to power or charge a receiver device; 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 first driver stage circuit comprising; a first switch configured to control the time-varying signal in response to a first control signal; a second capacitor coupled in parallel with the first switch; a third capacitor coupled to the first switch and to the second capacitor; and a second inductor coupled to the first switch and to the second capacitor; and a second driver stage circuit comprising; a second switch configured to control the time-varying signal in response to a second control signal; a fourth capacitor coupled in parallel with the second switch; a fifth capacitor coupled to the second switch and to the fourth capacitor; and a third inductor coupled to the second switch and to the fourth capacitor. - View Dependent Claims (20, 21)
-
Specification