Adaptive wireless energy transfer system
First Claim
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1. An apparatus for wirelessly transmitting power, the apparatus comprising:
- a power conversion circuit configured to convert power received from a power supply in each of a first mode and a second mode of operation, the first mode of operation based on a first non-zero coupling coefficient, and the second mode of operation based on a second non-zero coupling coefficient;
a first power transfer component electrically coupled to the power conversion circuit, the first power transfer component configured to wirelessly transfer charging power to a second power transfer component at a receiver based at least in part on the converted power; and
a controller configured to reconfigure the power conversion circuit between at least the first and second modes based at least in part on a value indicative of a coupling coefficient between the first and second power transfer components, while the first power transfer component is wirelessly coupled to the second power transfer component.
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Abstract
Exemplary embodiments are directed to wireless power transfer using magnetic resonance in a coupling mode region between a charging base (CB) and a remote system such as a battery electric vehicle (BEV). The wireless power transfer can occur from the CB to the remote system and from the remote system to the CB. Load adaptation and power control methods can be employed to adjust the amount of power transferred over the wireless power link, while maintaining transfer efficiency.
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Citations
19 Claims
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1. An apparatus for wirelessly transmitting power, the apparatus comprising:
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a power conversion circuit configured to convert power received from a power supply in each of a first mode and a second mode of operation, the first mode of operation based on a first non-zero coupling coefficient, and the second mode of operation based on a second non-zero coupling coefficient; a first power transfer component electrically coupled to the power conversion circuit, the first power transfer component configured to wirelessly transfer charging power to a second power transfer component at a receiver based at least in part on the converted power; and a controller configured to reconfigure the power conversion circuit between at least the first and second modes based at least in part on a value indicative of a coupling coefficient between the first and second power transfer components, while the first power transfer component is wirelessly coupled to the second power transfer component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of wirelessly transmitting power, comprising:
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converting power received from a power supply by a power conversion circuit; operating the power conversion circuit such that the power conversion circuit is able to convert power in each of a first mode and a second mode, the first mode of operation based on a first non-zero coupling coefficient, and the second mode of operation based on a second non-zero coupling coefficient; wirelessly transferring charging power from a first power transfer component to a second power transfer component of a receiver based at least in part on the converted power; and reconfiguring the power conversion circuit between the first and second modes based at least in part on a value indicative of a coupling coefficient between the first and second power transfer components, while the first power transfer component is wirelessly coupled to the second power transfer component. - View Dependent Claims (15, 16, 17, 18)
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19. An apparatus for wirelessly transmitting power, the apparatus comprising:
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means for converting power received from a power supply in each of a first mode and a second mode of operation, the first mode of operation based on a first non-zero coupling coefficient, and the second mode of operation based on a second non-zero coupling coefficient; means for wirelessly transferring charging power to a power transfer component based at least in part on the converted power; and means for reconfiguring the converting means between the first and second modes based at least in part on a value indicative of a coupling coefficient between the transferring means and the power transfer component, while the transferring means is wirelessly coupled to the second power transfer component.
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Specification