SYSTEM AND METHOD FOR CONTROLLING POWER TRANSFER ACROSS AN INDUCTIVE POWER COUPLING
First Claim
1. A signal transfer system for controlling inductive power transfer between a primary inductive coil and a secondary inductive coil, the signal transfer system comprising a transmission circuit configured to transmit control signals, wherein the transmission circuit comprises at least one ancillary load selectively connectable to the secondary inductive coil.
4 Assignments
0 Petitions
Accused Products
Abstract
A signal transfer system for controlling power transfer across an inductive power coupling. A transmission circuit associated with an inductive power receiver is configured to transmit a control signal to a reception circuit associated with an inductive power outlet. The transmission circuit includes an ancillary load and a switching unit for modulating power drawn by a secondary inductive coil according to the control signal. The reception circuit is configured to monitor power provided to a primary inductive coil thereby detecting the modulated control signal. The signal transfer system may be used to regulate the power supplied by the inductive coupling and to detect the presence of the secondary coil.
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Citations
20 Claims
- 1. A signal transfer system for controlling inductive power transfer between a primary inductive coil and a secondary inductive coil, the signal transfer system comprising a transmission circuit configured to transmit control signals, wherein the transmission circuit comprises at least one ancillary load selectively connectable to the secondary inductive coil.
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17. A method for transferring a signal through an inductive energy coupling, the inductive energy coupling comprising a primary coil connected to a power source and a secondary coil connected to an electric load, the method comprising:
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providing an input signal; providing a bit-rate signal; modulating the bit-rate signal with the input signal to create a modulated signal; connecting an ancillary load to the secondary coil intermittently according to the modulated signal; monitoring a primary current drawn by the primary coil and producing a primary current signal; and cross-correlating the primary current signal with the bit-rate signal to generate an output signal. - View Dependent Claims (18)
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19. A method for detecting the presence of a secondary inductive coil coupled to a primary inductive coil the method comprising:
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providing a power monitor for monitoring power provided to the primary inductive coil; providing an ancillary load connectable to the secondary inductive coil via a frequency divider, and the power monitor detecting harmonic signals in the power supplied to the primary inductive coil indicating power being drawn by the ancillary load. - View Dependent Claims (20)
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Specification