Auxiliary circuits for selection and enhancement of multi-frequency wireless power transfer to multiple loads
First Claim
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1. A wireless power transfer system for transferring power at more than one frequency, comprising:
- a transmitter capable of transmitting power wirelessly at more than one frequency;
a first targeted receiver tuned to resonate and receive power at a first frequency from the transmitter and passing it to a load of the first targeted receiver;
a second non-targeted receiver tuned to resonate and receive power at a second frequency, but not passing to a load power at the first frequency from the transmitter;
an auxiliary circuit in said second non-targeted receiver in the form of a filter with reactive components to pass or block power at the first frequency to cause a part of the second non-targeted receiver to act as a resonator for the first frequency so as to relay power from the second non-targeted receiver to the first targeted receiver at the first frequency, so as to ensure proper frequency-selective wireless power flow from said second non-targeted receiver to the first targeted receiver, with pickup power retained by the second non-targeted receiver substantially reduced, even if the first and second frequencies are not widely separated.
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Abstract
This invention is related to a novel method and apparatus that provides selective and enhanced power flow in wireless power transfer systems with multiple receivers. Auxiliary circuits are introduced in the receiver circuits (and relay circuits if applicable) so as to ensure proper frequency-selective wireless power flow to the appropriate targeted receivers, with the pickup power by the non-targeted receivers substantially reduced even if the chosen tuned frequencies for different receivers are not widely apart.
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Citations
8 Claims
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1. A wireless power transfer system for transferring power at more than one frequency, comprising:
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a transmitter capable of transmitting power wirelessly at more than one frequency; a first targeted receiver tuned to resonate and receive power at a first frequency from the transmitter and passing it to a load of the first targeted receiver; a second non-targeted receiver tuned to resonate and receive power at a second frequency, but not passing to a load power at the first frequency from the transmitter; an auxiliary circuit in said second non-targeted receiver in the form of a filter with reactive components to pass or block power at the first frequency to cause a part of the second non-targeted receiver to act as a resonator for the first frequency so as to relay power from the second non-targeted receiver to the first targeted receiver at the first frequency, so as to ensure proper frequency-selective wireless power flow from said second non-targeted receiver to the first targeted receiver, with pickup power retained by the second non-targeted receiver substantially reduced, even if the first and second frequencies are not widely separated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification