Inductive power supply with device identification
First Claim
1. A device detection system for detecting one of a plurality of devices capable of receiving inductive power, the system comprising:
- an inductive power supply for transferring wireless power to a device having a power receiving coil configured for receiving operating wireless power;
an inductive coil;
processor circuitry for determining a device response from the device as said inductive coil is driven, said device response being pre-determined by resonant frequency signature circuitry of the device;
a memory storing a frequency profile; and
wherein said processor circuitry is configured to determine whether said device response from the device substantially corresponds to said frequency profile, and wherein said processor circuitry controls said inductive power supply in response to a determination that said device response from the device substantially corresponds to said frequency profile.
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Accused Products
Abstract
An inductive power supply system to identify remote devices using unique identification frequencies. The system includes an AIPS and a tank circuit capable of inductively providing power to a remote device at different frequencies, and a sensor for sensing the reflected impedance of the remote device at tank circuit. The system further includes a plurality of different remote devices, each having a unique resonance frequency. In operation, the AIPS is capable of identifying the type of remote device present in the inductive field by applying power to a remote device at a plurality of unique identification frequencies until the remote device establishes resonance in response to one of the identification frequencies. The AIPS includes a controller that recognizes when resonance has been established by evaluating sensor data, which is representative of the reflected impedance of the remote device. Once the identity of a remote device is determined, the AIPS may pull operating parameters for the remove device from memory to ensure efficient operation and to assist in recognizing fault conditions.
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Citations
50 Claims
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1. A device detection system for detecting one of a plurality of devices capable of receiving inductive power, the system comprising:
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an inductive power supply for transferring wireless power to a device having a power receiving coil configured for receiving operating wireless power; an inductive coil; processor circuitry for determining a device response from the device as said inductive coil is driven, said device response being pre-determined by resonant frequency signature circuitry of the device; a memory storing a frequency profile; and wherein said processor circuitry is configured to determine whether said device response from the device substantially corresponds to said frequency profile, and wherein said processor circuitry controls said inductive power supply in response to a determination that said device response from the device substantially corresponds to said frequency profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for detection of a device capable of receiving inductive power, the method comprising:
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driving an inductive coil to transfer energy to a device having a power receiving coil; determining a device response from the device as the inductive coil is driven, the device response being generated at least in part by resonant frequency signature circuitry of the device; storing a frequency profile in memory; determining whether the device response of the device substantially corresponds to the frequency profile stored in memory; and controlling an inductive power supply in response to a determination that the device response from the device matches the frequency profile in memory. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A device detection apparatus for detecting one of a plurality of devices capable of receiving inductive power, the device detection apparatus comprising:
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an inductive power supply for transferring wireless power to a device having a power receiving coil configured for receiving operating wireless power; an inductive coil; processor circuitry for determining a device response from the device as said inductive coil is driven, said device response being predetermined by resonant frequency signature circuitry of the device; a memory storing a frequency signature; and wherein said processor circuitry is configured to determine whether said device response from the device substantially corresponds to said frequency signature, and wherein said processor circuitry controls said inductive power supply in response to a determination that said device response from the device substantially matches said frequency signature. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of detecting a known remote device, said method comprising:
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disposing a load in proximity to an inductive power supply, wherein the inductive power supply is configured for transferring wireless power to the load having a power receiving coil configured for receiving operating wireless power; applying power to an inductive coil to enable detection of the load in proximity to the inductive power supply; characterizing the load by obtaining a frequency response from the load, the frequency response being predetermined by resonant frequency signature circuitry of the load; determining whether the load is a known remote device based on the frequency response; and controlling the inductive power supply to supply operating wireless power in response to said determining the load is a known remote device. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A detection device comprising:
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an inductive power supply for transferring wireless power to a load configured for receiving operating wireless power; wherein said detection device is capable of driving an inductive coil to enable detection of the load in proximity to said inductive power supply; processor circuitry for characterizing the load by obtaining a frequency response of the load as said inductive coil is driven, the frequency response being predetermined by resonant frequency signature circuitry of the load; a memory storing a frequency signature associated with the load; and wherein the processor circuitry detects the load based on a comparison between said frequency response and said frequency signature. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. A remote device for receiving wireless power from an inductive power supply, said remote device comprising:
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a secondary coil configured to receive a first wireless power at a power transfer frequency and a second wireless power at a predetermined identification frequency, wherein the first wireless power is configured to be utilized as operating wireless power and the second wireless power is configured to be utilized for device identification; frequency signature circuitry including an identification capacitance in parallel to the secondary coil that is configured to identify a resonant frequency signature, the resonant frequency signature including one or more predetermined resonant identification frequencies different from the operating power transfer frequency, wherein the resonant frequency signature is configured to identify at least one of the remote device, a type of the remote device, a class of the remote device, or a manufacturer of the remote device; and wherein the frequency signature circuitry is configured to, in response to the remote device receiving wireless power at the resonant frequency signature, establish resonance at the one or more predetermined resonant identification frequencies which is conveyed through reflected impedance. - View Dependent Claims (49, 50)
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Specification