SYSTEM AND METHOD FOR BIDIRECTIONAL WIRELESS POWER TRANSFER
First Claim
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1. A remote device capable of receiving and transmitting wireless power, said remote device being separable from a wireless power supply, said remote device comprising:
- a transceiver configured to generate electrical power in response to a field generated by the wireless power supply and to transfer wireless power in response to being driven;
wireless power transceiver circuitry coupled to said transceiver, said wireless power transceiver circuitry being configurable between a receive mode and a transmit mode;
wherein in said transmit mode, said wireless power transceiver circuitry is capable of driving said transceiver to transfer wireless power; and
wherein in said receive mode, said wireless power transceiver circuitry is capable of rectifying said electrical power received in said transceiver from the wireless power supply, wherein said wireless power transceiver circuitry includes self-driven synchronous rectification circuitry.
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Abstract
The present invention relates to a wireless power supply system including a remote device capable of both transmitting and receiving power wirelessly. The remote device includes a self-driven synchronous rectifier. The wireless power supply system may also include a wireless power supply configured to enter an OFF state in which no power, or substantially no power, is drawn, and to wake from the OFF state in response to receiving power from a remote device.
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Citations
39 Claims
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1. A remote device capable of receiving and transmitting wireless power, said remote device being separable from a wireless power supply, said remote device comprising:
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a transceiver configured to generate electrical power in response to a field generated by the wireless power supply and to transfer wireless power in response to being driven; wireless power transceiver circuitry coupled to said transceiver, said wireless power transceiver circuitry being configurable between a receive mode and a transmit mode; wherein in said transmit mode, said wireless power transceiver circuitry is capable of driving said transceiver to transfer wireless power; and wherein in said receive mode, said wireless power transceiver circuitry is capable of rectifying said electrical power received in said transceiver from the wireless power supply, wherein said wireless power transceiver circuitry includes self-driven synchronous rectification circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A wireless power supply for transferring power to at least one remote device, said wireless power supply comprising:
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a primary for transferring wireless power to the at least one remote device, said primary configured to form an inductive link between said wireless power supply and the at least one remote device; converter circuitry configured to receive power from a power source and provide power to said primary; power saving circuitry capable of selectively enabling transmission of power from said power source in response to said wireless power supply receiving wireless power from the at least one remote device, wherein in a disabled state, said primary is disconnected from said power source, wherein said wireless power received by the wireless power supply powers said power saving circuity to selectively enable transmission of wireless power from said primary using said power from said power source. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of negotiating wireless power transfer between a remote device and a device, the remote device having a transceiver capable of transmitting wireless power in a transmit mode and receiving wireless power in a receive mode, said method comprising:
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detecting the device in sufficient proximity to the transceiver of the remote device; receiving, from the device, device information relating to the device; and determining based on the device information whether to transmit power in a transmit mode or to receive power in a receive mode. - View Dependent Claims (29, 30, 31, 32)
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33. A remote device capable of receiving and transmitting wireless power, said remote device capable of transmitting wireless power from a power source, said remote device comprising:
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a transceiver configured to generate electrical power in response to a field generated by a device and to transfer wireless power in response to being driven; wireless power transceiver circuitry coupled to said transceiver, said wireless power transceiver circuitry being configurable between a buck mode and a boost mode; wherein in said boost mode, said wireless power transceiver circuitry drives said transceiver with power from the power source, wherein said wireless power transceiver circuitry increases a voltage of the power source to drive said transceiver in said boost mode; and wherein in said buck mode, said wireless power transceiver circuitry is capable of rectifying said electrical power received in said transceiver, wherein said wireless power transceiver circuitry decreases a voltage of said power received in said transceiver in said buck mode. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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Specification