Back to results
US 9,431,169 B2Granted
Primary power supply tuning network for two coil device and method of operation
AssigneeQUALCOMM Incorporated
InventorsChang-Yu Huang, Nicholas A. Keeling, Mickel Budhia, Michael Kissin, Jonathan Beaver
Life of this patent
Estimating the term…
Abstract
This disclosure provides systems, methods and apparatus for connecting and operating an AC source to a load. In one aspect a power supply topology is provided which may be of particular use in the area of wireless power transfer. The topology allows for a single source to energize one or more conductive structures configured to generate a field, improving power transfer to a power receiver.
Claims24
A wireless power transmitter comprising:
- a first conductive structure configured to generate a first field;
- a second conductive structure in series with the first conductive structure and configured to generate a second field;
- a source configured to generate a drive signal;
- and
- a circuit configured to selectively route the drive signal to either one of the first or the second conductive structures or to both of the first and the second conductive structures, and further configured to maintain a tuning of the one or both of the first and second conductive structures driven by the drive signal, wherein the circuit comprises a plurality of tuning elements and a plurality of switches, wherein a switch of the plurality of switches is configured to switch a tuning element of the plurality of tuning elements between a first state and a second state different from the first state, wherein in the first state, the tuning element is in parallel with the first conductive structure.
2 more elements
A method of wirelessly transmitting power comprising:
- generating a drive signal with a source;
- and
- using a circuit comprising a plurality of tuning elements and a plurality of switches to route the drive signal dynamically during power transfer to either:
- energize a first conductive structure to generate a first field, wherein a switch of the plurality of switches places a tuning element of the plurality of tuning elements in a first state in which the tuning element is in parallel with the first conductive structure;
- energize a second conductive structure to generate a second field, wherein the switch of the plurality of switches places the tuning element of the plurality of tuning elements in a second state different from the first state;
- or
- energize the first and the second conductive structures in series to generate a third field.
4 more elements
A wireless power transmitter comprising:
- means for generating a drive signal;
- and
- means for routing the drive signal dynamically during power transfer to either:
- energize a first means for generating a first field, wherein a tuning element is in a first state in which the tuning element is in parallel with the first generating means;
- energize a second means for generating a second field, wherein the tuning element is in a second state different from the first state;
- or
- energize both of the first and the second means for generating to generate a third field, wherein the selectively routing means maintains a tuning of one or both of the first generating means and the second generating means.
4 more elements
Dependencies are inferred from the claim text.