Transmission-guard system and method for an inductive power supply
DCFirst Claim
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1. An inductive power outlet operable to transfer power to an inductive power receiver, said inductive power outlet comprising:
- a platform for supporting said inductive power receiver;
at least one primary inductive coil embedded in said platform;
an alignment mechanism configured to facilitate alignment between said primary inductive outlet and said inductive power receiver such that an inductive couple is formed between said primary inductive coil and a secondary inductive coil of said inductive power receiver, said inductive couple having a characteristic resonant frequency; and
a driving circuit wired to said primary inductive coil, said driving circuit comprising a switching unit configured and operable to provide an oscillating driving voltage across said primary inductive coil such that a secondary voltage is induced in the secondary inductive coil;
wherein said driving circuit is configured and operable to produce said oscillating driving voltage at a transmission frequency substantially different from said characteristic resonant frequency of said inductive couple.
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Abstract
A transmission-guard is disclosed for preventing an inductive power outlet from transmitting power in the absence of an inductive power receiver. A transmission lock is associated with an inductive power outlet and a transmission key is associated with an inductive power receiver. The transmission lock is configured to prevent a primary inductor from connecting to the power supply unless triggered by a release signal via the transmission key.
155 Citations
17 Claims
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1. An inductive power outlet operable to transfer power to an inductive power receiver, said inductive power outlet comprising:
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a platform for supporting said inductive power receiver; at least one primary inductive coil embedded in said platform; an alignment mechanism configured to facilitate alignment between said primary inductive outlet and said inductive power receiver such that an inductive couple is formed between said primary inductive coil and a secondary inductive coil of said inductive power receiver, said inductive couple having a characteristic resonant frequency; and a driving circuit wired to said primary inductive coil, said driving circuit comprising a switching unit configured and operable to provide an oscillating driving voltage across said primary inductive coil such that a secondary voltage is induced in the secondary inductive coil; wherein said driving circuit is configured and operable to produce said oscillating driving voltage at a transmission frequency substantially different from said characteristic resonant frequency of said inductive couple. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for transferring power from an inductive power outlet to an inductive power receiver, said method comprising:
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providing at least one primary inductive coil embedded in a platform; forming an inductive couple between said primary inductive coil and a secondary inductive coil of said inductive power receiver, said inductive couple having a characteristic resonant frequency; and providing an oscillating driving voltage across said primary inductive coil such that a secondary voltage is induced in the secondary inductive coil, wherein said oscillating driving voltage has a transmission frequency substantially different from said characteristic resonant frequency of said inductive couple. - View Dependent Claims (16, 17)
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Specification