US2010327661A1PendingUtilityA1

Packaging and details of a wireless power device

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Assignee: KARALIS ARISTEIDISPriority: Jul 12, 2005Filed: Sep 10, 2010Published: Dec 30, 2010
Est. expiryJul 12, 2025(expired)· nominal 20-yr term from priority
Inventors:Aristeidis KaralisAndre B. KursRobert MoffattJohn D. JoannopoulosPeter H. FisherMarin Soljacic
H02J 50/90B60L 2210/20Y10T29/4902Y02T90/14H01Q 7/00Y02T10/7072H02J 50/80H01Q 9/04Y02T10/70H02J 50/12Y02T90/12Y02T10/72B60L 53/126H04B 5/79
59
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Claims

Abstract

Described herein are embodiments of a wireless power transmitter for transmitting power to at least one high-Q resonator that includes a high-Q magnetic resonator, a transmit system that creates a driving signal at a frequency that is substantially resonant with said magnetic resonator, and a current sensor, sensing an amount of current that flows through said magnetic resonator and creates a current sense signal indicative thereof and wherein said signal indicative of current is used by said transmit system to change said driving signal based on a characteristic of transmitting by said magnetic resonator.

Claims

exact text as granted — not AI-modified
1 . A wireless power transmitter for transmitting power to at least one high-Q resonator, comprising:
 a high-Q magnetic resonator;   a transmit system that creates a driving signal at a frequency that is substantially resonant with said magnetic resonator; and   a current sensor, sensing an amount of current that flows through said magnetic resonator and creates a current sense signal indicative thereof;   wherein said signal indicative of current is used by said transmit system to change said driving signal based on a characteristic of transmitting by said magnetic resonator.   
     
     
         2 . A transmitter as in  claim 1 , wherein said magnetic resonator is tuned to 13.56 MHz. 
     
     
         3 . A transmitter as in  claim 1 , wherein said magnetic resonator is tuned to 135 kHz. 
     
     
         4 . A transmitter as in  claim 1 , further comprising a controller that monitors said current sense signal, and uses said signal to change said driving signal. 
     
     
         5 . A transmitter as in  claim 4 , further comprising a power indicator meter, and wherein said controller changes said signal based on an output of said power indicator meter. 
     
     
         6 . A transmitter as in  claim 4 , further comprising an inverter that creates said signal at said frequency of said magnetic resonator. 
     
     
         7 . A transmitter as in  claim 6 , wherein said controller controls characteristics of said inverter. 
     
     
         8 . A transmitter as in  claim 4 , further comprising a switching amplifier wherein said controller controls characteristics of said switching amplifier. 
     
     
         9 . A transmitter as in  claim 1 , wherein said magnetic resonator includes at least one component with a specified voltage and/or current rating, and further comprising an overload protection part, responsive to said amount of current, that prevents currents higher than a predetermined level based on ratings of electronic components. 
     
     
         10 . A wireless power receiver for receiving power from at least one high-Q resonator, comprising:
 a high-Q magnetic resonator;   a receive system that receives a signal at a frequency that is substantially resonant with said magnetic resonator; and supplies electrical power from said signal; and   a current sensor, sensing an amount of current that flows through said magnetic resonator and creating a current sense signal indicative thereof;   wherein said signal indicative of current is used by said receive system to change a characteristic of receiving based on said signal from said current sensor.   
     
     
         11 . A receiver as in  claim 10 , wherein said magnetic resonator is tuned to 13.56 MHz. 
     
     
         12 . A receiver as in  claim 10 , wherein said magnetic resonator is tuned to 135 kHz. 
     
     
         13 . A receiver as in  claim 10 , further comprising a controller that monitors said current sense signal from said current sensor, and uses said signal to change said receiving. 
     
     
         14 . A receiver as in  claim 13 , further comprising a power indicator meter, and wherein said controller also changes said receiving based on an output of said power indicator meter. 
     
     
         15 . A receiver as in  claim 13 , wherein said receive system further comprises rectifier circuitry that is controlled by said controller. 
     
     
         16 . A receiver as in  claim 10 , further comprising an overload protection part, responsive to said current sense signal, that prevents currents higher than a predetermined level based on ratings of electronic components from flowing in parts of the receive system. 
     
     
         17 . A receiver as in  claim 16 , wherein said ratings are ratings of components forming the magnetic resonator. 
     
     
         18 . A method for receiving power wirelessly from at least one high-Q resonator, comprising:
 using a high-Q magnetic resonator which is tuned to have a magnetic resonance at a first frequency to receive a wireless magnetic signal;   using electrical circuitry connected to said magnetic resonator to convert the received magnetic signal to electrical power;   sensing an amount of current that flows through said magnetic resonator and creating a current sense signal indicative thereof; and   adjusting said electrical circuitry, based on said current sense signal, to adjust an amount of received power.   
     
     
         19 . A method as in  claim 18 , wherein said using comprises using said magnetic resonator to receive wireless power. 
     
     
         20 . A method as in  claim 18 , wherein said magnetic resonator is tuned to 13.56 MHz. 
     
     
         21 . A method as in  claim 18 , wherein said magnetic resonator is tuned to 135 kHz. 
     
     
         22 . A method as in  claim 18 , wherein said magnetic resonator includes at least one component with a specified voltage and/or current rating, and further comprising an overload protection part, responsive to said amount of current, that prevents currents higher than a predetermined level based on ratings of electronic components. 
     
     
         23 . A method for transmitting power wirelessly to at least one high-Q resonator, comprising:
 using electrical circuitry to convert electrical power to a drive signal at a first frequency;   using a high-Q magnetic resonator which is tuned to have a magnetic resonance at said first frequency to generate a wireless magnetic signal based on said drive signal;   sensing an amount of current that flows through said magnetic resonator and creating a current sense signal indicative thereof; and   said electrical circuitry changing a way that it interfaces with said magnetic resonator based on said current sense signal to change an amount of transmitted power.   
     
     
         24 . A method as in  claim 23 , wherein said magnetic resonator is tuned to 13.56 MHz. 
     
     
         25 . A method as in  claim 23 , wherein said magnetic resonator is tuned to 135 kHz. 
     
     
         26 . A method as in  claim 23 , wherein said magnetic resonator includes at least one component with a specified voltage and/or current rating, and further comprising an overload protection part, responsive to said amount of current, that prevents currents higher than a predetermined level based on ratings of electronic components from impacting the transmitting. 
     
     
         27 . A wireless power receiver for receiving power wirelessly from at least one high-Q resonator, comprising:
 a high-Q magnetic resonator; and   a receive system that receives a signal at a frequency that is substantially resonant with said magnetic resonator, and supplies electrical power from said signal, said receive system including electrical circuitry that adjusts the supply of electrical power from the receiver.   
     
     
         28 . A receiver as in  claim 27 , wherein said receive system includes a rectifier. 
     
     
         29 . A receiver as in  claim 28 , wherein said receive system adjusts a frequency of said electrical circuitry to adjust the received power. 
     
     
         30 . A receiver as in  claim 27 , wherein said receive system includes a DC-to-DC converter. 
     
     
         31 . A receiver as in  claim 30 , wherein said receive system adjusts said DC-to-DC converter to adjust the received power. 
     
     
         32 . A receiver as in  claim 30 , further comprising a current sensor, sensing an amount of current that flows through said magnetic resonator and creates a signal indicative thereof. 
     
     
         33 . A receiver as in  claim 32 , wherein said receive system is adjusted to create more electrical power during a time when said signal indicative of current indicates that more power is being received. 
     
     
         34 . A receiver as in  claim 27 , wherein said magnetic resonator is tuned to 13.56 MHz. 
     
     
         35 . A receiver as in  claim 27 , wherein said magnetic resonator is tuned to 135 kHz.

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