SELF-TUNING RESONANT POWER TRANSFER SYSTEMS
First Claim
1. A wireless power transfer system comprising:
- a transmitter comprising a transmit resonator coupled to a voltage source; and
a receiver comprising a receive resonator coupled to a load through a rectifier circuit, wherein the system is configured to be actively tuned by modifying a reactance of the load to tune a resonant frequency of the transmit and receive resonators.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems and designs for tuning a wireless power transfer system are provided, which may include any number of features. In one embodiment, a wireless power transfer system can be configured such that resonant frequencies of the system move towards an operating frequency of the system as a coupling coefficient between the transmit and receive resonators becomes smaller. In another embodiment, a receive controller can be configured to control a current delivered to a DC load by comparing an actual current at the DC load to a current requested by the DC load and adjusting an angle or a magnitude of a voltage at the DC load to match the requested current. In another embodiment, a rectifier circuit can act as a controlled voltage source and be configured to tune resonant frequencies between the transmit resonator and the receive resonator. Methods of use are also provided.
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Citations
20 Claims
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1. A wireless power transfer system comprising:
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a transmitter comprising a transmit resonator coupled to a voltage source; and a receiver comprising a receive resonator coupled to a load through a rectifier circuit, wherein the system is configured to be actively tuned by modifying a reactance of the load to tune a resonant frequency of the transmit and receive resonators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating a wireless power transfer system, the method comprising:
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inductively coupling a transmitter to a receiver, the transmitter including a transmit resonator coupled to a voltage source, and the receiver including a receive resonator coupled to a load through a rectifier circuit; and actively tuning a resonant frequency of the transmit and receive resonators by modifying a reactance of the load. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification