Wireless power control
First Claim
Patent Images
1. A remote device for receiving wireless power from a wireless power supply, said remote device comprising:
- an adaptive power receiver capable of receiving power from the wireless power supply through inductive coupling, said adaptive power receiver configurable to a first mode and configurable to a second mode;
wherein said adaptive power receiver includes adaptive control circuitry capable of both rectifying received power and switching the adaptive power receiver between said first mode and said second mode;
wherein said adaptive power receiver includes a secondary tank circuit, and wherein said adaptive control circuitry includes at least two switches capable of selectively coupling said secondary tank circuit to a common reference;
wherein activating a first switch and a second switch of said at least two switches selectively couples said secondary tank circuit to said common reference through both said first switch and said second switch, thereby configuring said adaptive power receiver in said first mode as a high-Q resonator; and
wherein activating said first switch and leaving said second switch inactive enables semi-synchronous rectification of received power and configures said adaptive power receiver in said second mode as a low-Q resonator;
a load for receiving electrical power generated in said adaptive power receiver, wherein in said first mode, said adaptive power receiver is capable of storing energy received from the wireless power supply, wherein said second mode, said adaptive power receiver releases said stored energy to said load; and
a controller operably coupled to the adaptive power receiver, said controller capable of controlling power received from the wireless power supply by selectively configuring the adaptive power receiver between said first mode and said second mode.
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Abstract
A remote device in accordance with the present invention includes an adaptive power receiver that receives wireless power from the wireless power supply by induction. The adaptive power receiver may be switched among two or more modes of operation, including, for example, a high-Q mode and a low-Q mode. By controlling the switching between modes, the amount of energy received by the adaptive receiver may be controlled. This control is a form of adaptive resonance control or Q control.
20 Citations
45 Claims
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1. A remote device for receiving wireless power from a wireless power supply, said remote device comprising:
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an adaptive power receiver capable of receiving power from the wireless power supply through inductive coupling, said adaptive power receiver configurable to a first mode and configurable to a second mode; wherein said adaptive power receiver includes adaptive control circuitry capable of both rectifying received power and switching the adaptive power receiver between said first mode and said second mode; wherein said adaptive power receiver includes a secondary tank circuit, and wherein said adaptive control circuitry includes at least two switches capable of selectively coupling said secondary tank circuit to a common reference; wherein activating a first switch and a second switch of said at least two switches selectively couples said secondary tank circuit to said common reference through both said first switch and said second switch, thereby configuring said adaptive power receiver in said first mode as a high-Q resonator; and wherein activating said first switch and leaving said second switch inactive enables semi-synchronous rectification of received power and configures said adaptive power receiver in said second mode as a low-Q resonator; a load for receiving electrical power generated in said adaptive power receiver, wherein in said first mode, said adaptive power receiver is capable of storing energy received from the wireless power supply, wherein said second mode, said adaptive power receiver releases said stored energy to said load; and a controller operably coupled to the adaptive power receiver, said controller capable of controlling power received from the wireless power supply by selectively configuring the adaptive power receiver between said first mode and said second mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for controlling power received from a wireless power supply in a remote device, said method comprising:
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receiving power in an adaptive power receiver via inductive coupling with the wireless power supply; selectively configuring the adaptive power receiver in a first mode in which the adaptive power receiver is capable of storing energy received from the wireless power supply; and selectively configuring the adaptive power receiver in a second mode in which the adaptive power receiver releases stored energy to a load; wherein said adaptive power receiver includes adaptive control circuitry capable of both rectifying received power and switching the adaptive power receiver between said first mode and said second mode; wherein said adaptive power receiver includes a secondary tank circuit, and wherein said adaptive control circuitry includes at least two switches capable of selectively coupling said secondary tank circuit to a common reference; wherein activating a first switch and a second switch of said at least two switches selectively couples said secondary tank circuit to said common reference through both said first switch and said second switch, thereby configuring said adaptive power receiver in said first mode as a high-Q resonator; wherein activating said first switch and leaving said second switch inactive enables semi-synchronous rectification of received power and configures said adaptive power receiver in said second mode as a low-Q resonator. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A remote device for receiving wireless power from a wireless power supply, said remote device comprising:
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an adaptive power receiver capable of receiving power from the wireless power supply through inductive coupling, said adaptive power receiver configurable to a first mode and configurable to a second mode; a load for receiving electrical power generated in said adaptive power receiver, wherein in said first mode, said adaptive power receiver is capable of storing energy received from the wireless power supply, wherein said second mode, said adaptive power receiver releases said stored energy to said load; and a controller operably coupled to the adaptive power receiver, said controller capable of controlling power received from the wireless power supply by selectively configuring the adaptive power receiver between said first mode and said second mode, wherein upon initialization, said controller determines whether said adaptive power receiver is tightly coupled to the wireless power supply or loosely coupled to the wireless power supply;
based on determining said adaptive power receiver is loosely coupled, said controller begins selectively switching the adaptive power receiver between said first and second modes; and
based on determining said adaptive power receiver is tightly coupled, said controller holds said adaptive power receiver in said second mode. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method for controlling power received from a wireless power supply in a remote device, said method comprising:
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receiving power in an adaptive power receiver via inductive coupling with the wireless power supply; selectively configuring the adaptive power receiver in a first mode in which the adaptive power receiver is capable of storing energy received from the wireless power supply; and selectively configuring the adaptive power receiver in a second mode in which the adaptive power receiver releases stored energy to a load; wherein upon initialization, determining whether said adaptive power receiver is tightly coupled to the wireless power supply or loosely coupled to the wireless power supply; based on determining said adaptive power receiver is loosely coupled, selectively switching the adaptive power receiver between said first and second modes; and
based on determining said adaptive power receiver is tightly coupled, holding said adaptive power receiver in said second mode. - View Dependent Claims (40, 41, 42, 43, 44, 45)
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Specification