Method and apparatus for adjustable coupling for improved wireless high Q resonant power transfer
First Claim
1. An apparatus for wireless inductive power transfer, comprising:
- a primary resonator configured to wirelessly transfer power to a secondary resonator coupled to a load of a wireless power receiver;
a coupling circuit configured to couple energy from a source power supply to the primary resonator; and
a controller configured to;
receive, from the wireless power receiver, an indication of one of a power throughput of power delivered to the load or an efficiency of power experienced by the load, andadjust, based at least in part on the received indication, a degree of coupling between the source power supply and the primary resonator, via the coupling circuit, based on an adjustment of a degree of coupling between the secondary resonator and the load of the wireless power receiver,wherein the primary resonator is configured to resonate at a first frequency and the controller is configured to adjust the degree of coupling between the source power supply and the primary resonator while maintaining resonance of the primary resonator at the first frequency.
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Accused Products
Abstract
Methods and apparatuses for wireless inductive power transfer are described herein. One implementation may include an apparatus for wireless inductive power transfer. The apparatus comprises a primary resonator configured to wirelessly transfer power to a secondary resonator coupled to a load of a wireless power receiver. The apparatus comprises a coupling circuit configured to couple energy from a source power supply to the primary resonator. The apparatus comprises a controller configured to coordinate an adjustment of a first amount of coupling between the source power supply and the primary resonator, via the coupling circuit, with an adjustment of a second amount of coupling between the secondary resonator and the load of the wireless power receiver. The coupling circuit comprises a first coupling loop comprising a plurality of segments, each configured to be selectively electrically connected to the source power supply, the first coupling loop electrically isolated from the primary resonator.
16 Citations
9 Claims
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1. An apparatus for wireless inductive power transfer, comprising:
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a primary resonator configured to wirelessly transfer power to a secondary resonator coupled to a load of a wireless power receiver; a coupling circuit configured to couple energy from a source power supply to the primary resonator; and a controller configured to; receive, from the wireless power receiver, an indication of one of a power throughput of power delivered to the load or an efficiency of power experienced by the load, and adjust, based at least in part on the received indication, a degree of coupling between the source power supply and the primary resonator, via the coupling circuit, based on an adjustment of a degree of coupling between the secondary resonator and the load of the wireless power receiver, wherein the primary resonator is configured to resonate at a first frequency and the controller is configured to adjust the degree of coupling between the source power supply and the primary resonator while maintaining resonance of the primary resonator at the first frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification