ENERGY EFFICIENT INDUCTIVE POWER TRANSMISSION SYSTEM AND METHOD
First Claim
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1. An inductive power outlet for transmitting power to at least one inductive power receiver, said inductive power outlet comprising:
- at least one primary inductor wired to a power supply, said primary inductor for forming an inductive couple with at least one secondary inductive coil associated with said inductive power receiver; and
at least one driver configured to provide an oscillating voltage across said primary inductor; and
said inductive power receiver comprising;
said at least one secondary inductive coil ; and
an output regulator operable to monitor induced voltage across said secondary inductive coil;
to detect an activation voltage pulse;
to compare said induced voltage with at least one threshold value;
to send at least one instruction signal to the inductive power outlet; and
to provide power to an electric load;
wherein said inductive power outlet is operable to induce an activation voltage pulse across said secondary inductive coil of said inductive power receiver thereby initiating said inductive power receiver to send an identification signal to said inductive power outlet and to start drawing power therefrom.
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Abstract
An inductive power transfer system and method for transferring power to an electrical device wirelessly. The system includes an inductive power outlet and an inductive power receiver. During operation, instruction signals are sent from the inductive power outlet to the inductive power receiver. When no instruction signals are transferred, the system is configured to deactivate such that power is drawn by the system only during operation.
64 Citations
19 Claims
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1. An inductive power outlet for transmitting power to at least one inductive power receiver, said inductive power outlet comprising:
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at least one primary inductor wired to a power supply, said primary inductor for forming an inductive couple with at least one secondary inductive coil associated with said inductive power receiver; and at least one driver configured to provide an oscillating voltage across said primary inductor; and said inductive power receiver comprising; said at least one secondary inductive coil ; and an output regulator operable to monitor induced voltage across said secondary inductive coil;
to detect an activation voltage pulse;
to compare said induced voltage with at least one threshold value;
to send at least one instruction signal to the inductive power outlet; and
to provide power to an electric load;wherein said inductive power outlet is operable to induce an activation voltage pulse across said secondary inductive coil of said inductive power receiver thereby initiating said inductive power receiver to send an identification signal to said inductive power outlet and to start drawing power therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An inductive power receiver for receiving power from at least one inductive power outlet, said inductive power receiver comprising:
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at least one secondary inductor for forming an inductive couple with at least one primary inductive coil; and at least one signal transmission circuit configured to generate at least one instruction signal, said instruction signal being detectable by a signal detector associated with said inductive power outlet as a pulse having a characteristic frequency of peaks in primary voltage or primary current; wherein; said inductive power outlet is configured to drive an oscillating voltage across said primary inductive coil for a limited time duration and to stop driving said oscillating voltage if no instruction signal is received during said time duration; and said transmission circuit is operable to send at least one instruction signal to said inductive power outlet during each said time duration. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method for transferring power inductively comprising:
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obtaining an inductive power outlet comprising;
at least one primary inductor, at least one driver and at least one instruction signal detector;obtaining an inductive power receiver comprising;
at least one secondary inductor and at least one instruction signal generator;driving said primary inductor for a limited time duration; monitoring said signal detector; if at least one instruction signal is detected by said instruction signal detector during said time duration, then repeating steps of driving said primary inductor and monitoring said signal detector; and if no instruction signal is received during said time duration, then terminating said driver. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification