INDUCTIVE POWER SUPPLY WITH DEVICE IDENTIFICATION
First Claim
1. A method for controlling an inductive power supply, comprising the steps of:
- associating an identification frequency with a remote device, the identification frequency including at least one frequency at which the remote device has a resonant frequency;
applying an inductive field to a remote device at the identification frequency;
determining whether the remote device has a resonant frequency substantially at the applied identification frequency; and
operating the inductive power supply based on an outcome of said determining step.
2 Assignments
0 Petitions
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
26 Claims
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1. A method for controlling an inductive power supply, comprising the steps of:
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associating an identification frequency with a remote device, the identification frequency including at least one frequency at which the remote device has a resonant frequency; applying an inductive field to a remote device at the identification frequency; determining whether the remote device has a resonant frequency substantially at the applied identification frequency; and operating the inductive power supply based on an outcome of said determining step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for operating an inductive power supply comprising the steps of:
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storing a plurality of identification profiles and at least one operating parameter associated with each identification profile in a memory associated with an inductive power supply; applying inductive power to a remote device at one or more frequencies to determine the identification profile of the remote device contained within the inductive field; comparing the determined profile with the stored identification profiles to determine an identity of the remote device; retrieving an operating parameter from the memory upon determination of the identity of the remote device; and operating the inductive power supply in accordance with the retrieved operating parameter. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for securely controlling an inductive power supply, comprising the steps of:
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determining a common identification profile for remote devices to be powered by the inductive power supply, the common identification profile including one or more resonant frequencies; providing each remote device to be powered by the inductive power supply with the common identification profile; applying an inductive field to a remote device at the one or more resonant frequencies of the common identification profile; determining whether said remote device has a resonant frequency profile corresponding with the common identification profile; and operating the inductive power supply to power the remote device if the remote device has a resonant frequency profile corresponding with the common identification profile. - View Dependent Claims (17)
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18. An inductive power supply comprising:
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inductive field generating circuitry; frequency control circuitry electrically connected to said inductive field generating circuitry, said control circuitry capable of operating said inductive field generating circuitry at a plurality of different frequencies; reflected impedance sensing circuitry to sense a characteristic of power in the inductive power supply, said characteristic being indicative of a reflected impedance of a remote device; identification circuitry to determine an identification profile of a remote device as a function of output of said reflected impedance sensing circuitry; and power supply control circuitry for supplying power to the remote device as a function of the identification profile of the remote device. - View Dependent Claims (19, 20, 21, 22)
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23. An inductive power supply and remote device combination comprising:
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a remote device having an identification profile, said identification profile including one or more resonant frequencies; and an inductive power supply having; a driver; a tank circuit having a primary; a sensor in said tank circuit adapted to sense a characteristic of power in said tank circuit indicative of a reflected impedance of said remote device; identification circuitry to determine said identification profile of said remote device as a function of output of said sensor; and control circuitry for controlling operation of said inductive power supply as a function of said identification profile of said remote device. - View Dependent Claims (24, 25, 26)
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Specification