Vehicle alignment for wireless charging
First Claim
1. A wireless-power receiver comprising:
- a resonant circuit including a power transfer element, the resonant circuit having a resonant frequency;
a power-receiving circuit coupled to the resonant circuit; and
a controller, coupled to the resonant circuit, configured to;
determine a first resonant frequency of the resonant circuit corresponding to a first time;
determine a second resonant frequency of the resonant circuit corresponding to a second time; and
determine an offset of the power transfer element relative to a power transmitter based on the first resonant frequency and the second resonant frequency.
2 Assignments
0 Petitions
Accused Products
Abstract
A method of operating a wireless-power receiver comprises: determining a first resonant frequency of a resonant circuit, of the wireless-power receiver, corresponding to a first time at which the wireless-power receiver is disposed at a first longitudinal offset from a power transmitter, the first longitudinal offset being relative to a length of a device containing the wireless-power receiver; determining a second resonant frequency of the resonant circuit, corresponding to a second time at which the wireless-power receiver is disposed at a second longitudinal offset from the power transmitter, the second longitudinal offset being relative to the length of the device containing the wireless-power receiver, and the first longitudinal offset being different from the second longitudinal offset; and determining a lateral misalignment of the wireless-power receiver relative to a wireless-power transmitter based on the first resonant frequency and the second resonant frequency.
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Citations
34 Claims
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1. A wireless-power receiver comprising:
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a resonant circuit including a power transfer element, the resonant circuit having a resonant frequency; a power-receiving circuit coupled to the resonant circuit; and a controller, coupled to the resonant circuit, configured to; determine a first resonant frequency of the resonant circuit corresponding to a first time; determine a second resonant frequency of the resonant circuit corresponding to a second time; and determine an offset of the power transfer element relative to a power transmitter based on the first resonant frequency and the second resonant frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 31, 32, 33, 34)
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12. A method of operating a wireless-power receiver, the method comprising:
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determining a first resonant frequency of a resonant circuit, of the wireless-power receiver, corresponding to a first time at which the wireless-power receiver is disposed at a first longitudinal offset from a power transmitter, the first longitudinal offset being relative to a length of a device containing the wireless-power receiver; determining a second resonant frequency of the resonant circuit, corresponding to a second time at which the wireless-power receiver is disposed at a second longitudinal offset from the power transmitter, the second longitudinal offset being relative to the length of the device containing the wireless-power receiver, and the first longitudinal offset being different from the second longitudinal offset; and determining a lateral misalignment of the wireless-power receiver relative to a wireless-power transmitter based on the first resonant frequency and the second resonant frequency. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A wireless-power receiver comprising:
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means for resonating, including a power transfer element, the means for resonating having a resonant frequency; power-receiving means coupled to the means for resonating; first determining means, coupled to the means for resonating, for; determining a first resonant frequency of the means for resonating corresponding to a first time; and determining a second resonant frequency of the means for resonating corresponding to a second time; and second determining means, coupled to the first determining means, for determining a lateral misalignment of the power-receiving means relative to a wireless-power transmitter based on the first resonant frequency and the second resonant frequency. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A non-transitory, processor-readable storage medium storing processor-readable instructions configured to cause a processor to:
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determine a first resonant frequency of a resonant circuit, of a vehicular wireless-power receiver, corresponding to a first time; determine a second resonant frequency of the resonant circuit, of the vehicular wireless-power receiver, corresponding to a second time; and determine an offset of a power transfer element of the vehicular wireless-power receiver relative to a power transmitter based on the first resonant frequency and the second resonant frequency; wherein the offset of the power transfer element relative to the power transmitter is a lateral misalignment, of the power transfer element relative to the power transmitter, substantially transverse to at least one of a direction of travel of a vehicle containing the vehicular wireless-power receiver or a line through centers of a plurality of power transmitters.
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Specification