Wireless inductive power transfer
First Claim
1. A power transmitter for transferring power to a power receiver using a wireless inductive power signal, the power transmitter comprising:
- an inductor for providing the wireless inductive power signal in response to a drive signal fed to the inductor;
a power source for providing a power source signal;
a power signal generator for generating the drive signal from the power source signal, the power signal generator comprising;
a frequency converter arranged to generate a frequency of the drive signal to be higher than a frequency of the power source signal,a limiter for restricting a power of the drive signal fed to the inductor to be below a threshold in repeating time intervals;
a synchronizer for synchronizing the repeating time intervals to the power source signal; and
a communication unit for exchanging data with the power receiver during the repeating time intervals.
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Accused Products
Abstract
A power transmitter for transferring power to a power receiver using a wireless inductive power signal includes a power source provides a power source signal which may have level variations. A power signal generator generates a drive signal from the power source signal by a frequency converter which increases the frequency of the drive signal relative to the power source signal. A limiter restricts the power of the drive signal fed to the inductor to be below a threshold in repeating time intervals. A synchronizer synchronizes the repeating time intervals to the power source signal. In the power receiver, an inductor receives a power signal from the power transmitter, a load coupler decouples the power load from the inductor during the repeating time intervals and a synchronizer synchronizes the repeating time intervals of the receiver to the power signal. Communication units exchange data during the repeating time intervals.
24 Citations
20 Claims
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1. A power transmitter for transferring power to a power receiver using a wireless inductive power signal, the power transmitter comprising:
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an inductor for providing the wireless inductive power signal in response to a drive signal fed to the inductor; a power source for providing a power source signal; a power signal generator for generating the drive signal from the power source signal, the power signal generator comprising; a frequency converter arranged to generate a frequency of the drive signal to be higher than a frequency of the power source signal, a limiter for restricting a power of the drive signal fed to the inductor to be below a threshold in repeating time intervals; a synchronizer for synchronizing the repeating time intervals to the power source signal; and a communication unit for exchanging data with the power receiver during the repeating time intervals. - 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 of operation for a power transmitter transferring power to a power receiver using a wireless inductive power signal, the power transmitter comprising an inductor for providing the wireless inductive power signal in response to a drive signal fed to the inductor;
- and the method comprising acts of;
providing a power source signal; generating the drive signal from the power source signal, the generating comprising; generating a frequency of the drive signal to be higher than a frequency of the power source signal, and restricting a power of the drive signal fed to the inductor to be below a threshold in repeating time intervals; synchronizing the repeating time intervals to the power source signal; and exchanging data with the power receiver during the repeating time intervals.
- and the method comprising acts of;
Specification