NON RESONANT INDUCTIVE POWER TRANSMISSION SYSTEM AND METHOD
First Claim
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1. An inductive power transfer system comprising at least one inductive power outlet comprising at least one primary inductive coil wired to a power supply via a driver;
- said primary inductive coil for forming an inductive couple with at least one secondary inductive coil wired to an electric load, said secondary inductive coil associated with an inductive power receiver wherein said driver is configured to provide a driving voltage across said primary inductive coil, said driving voltage oscillating at a transmission frequency significantly different from the resonant frequency of said inductive couple.
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Abstract
Non-resonant inductive power transmission wherein the driving voltage across a primary inductor oscillates at a frequency significantly different from the resonant frequency of the inductive coupling system. Embodiments of the invention include systems and methods for: power regulation using frequency control, fault detection using voltage peak detectors and inductive communication channels.
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Citations
24 Claims
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1. An inductive power transfer system comprising at least one inductive power outlet comprising at least one primary inductive coil wired to a power supply via a driver;
- said primary inductive coil for forming an inductive couple with at least one secondary inductive coil wired to an electric load, said secondary inductive coil associated with an inductive power receiver wherein said driver is configured to provide a driving voltage across said primary inductive coil, said driving voltage oscillating at a transmission frequency significantly different from the resonant frequency of said inductive couple.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for regulating power transmission inductive from a primary inductive coil, wired to a power supply via a driver, to a secondary inductive coil, wired to an electric load, said method comprising the following steps:
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step (a)—
providing an oscillating voltage to said primary inductive coil at an initial transmission frequency ft which is substantially different from the resonant frequency fR of the system;step (b)—
inducing a secondary voltage in said secondary inductive coil;step (c)—
monitoring power received by said electric load;step (d)—
sending a feedback signal when the monitored power deviates from a predetermined range;step (e)—
said driver receiving said feedback signal;step (f)—
said driver adjusting said transmission frequency; andstep (g)—
repeating steps (b) to (f). - View Dependent Claims (21, 22, 23)
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24. A method for transferring a signal from a secondary inductive coil to a primary inductive coil of an inductive power transfer system, said method comprising the following steps:
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Step (i)—
connecting said primary inductive coil to a voltage monitor for monitoring amplitude of a primary voltage across said primary coil;Step (ii)—
connecting said secondary inductive coil to a transmission circuit for selectively increasing resonant frequency of said inductive power transfer system;Step (iii)—
providing an oscillating voltage to said primary inductive coil at an initial transmission frequency higher than an initial resonant frequency of said inductive power transfer system, thereby inducing a voltage in said secondary inductive coil;Step (iv)—
using said transmission circuit to modulate a bit-rate signal with said input signal to create a modulated signal and connecting said electrical element to said secondary inductive coil intermittently according to said modulated signal, andStep (v)—
using said voltage monitor to cross-correlate said amplitude of said primary voltage with said bit-rate signal thereby producing an output signal.
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Specification