Method of multi-coil operation and optimization
First Claim
1. A wireless power transfer receiver device for controlling a current supplied to a battery, comprising:
- a first receiver coil;
a second receiver coil, the first and second receiver coils substantially co-planar;
a third receiver coil, the co-planar first and second receiver coils collectively positioned substantially central to the third receiver coil, the first, second, and third receiver coils configured to electrically connect to a load; and
a controller comprising a sensor, the controller configured to determine a current of the co-planar first and second receiver coils, a current of the third receiver coil, and a duty cycle of a power signal received by the wireless power transfer receiver device using the sensor, the controller further configured to enable;
the co-planar first and second receiver coils to supply first current to the load,the third receiver coil to supply second current to the load, orthe co-planar first and second receiver coils to supply the first current to the load and the third receiver coil to supply the second current to the load based on at least one of a comparison of the current of the co-planar first and second receiver coils with the current of the third receiver coil or a comparison of the current of the co-planar first and second receiver coils with the duty cycle,wherein the first receiver coil, the second receiver coil, and the third receiver coil are implemented in the wireless power transfer receiver for wireless power transfer.
2 Assignments
0 Petitions
Accused Products
Abstract
This disclosure provides systems, methods and apparatus for wireless power transfer and particularly wireless power transfer to remote systems such as electric vehicles. In one aspect, a system comprises substantially co-planar first and second receiver coils. The system further comprises a third receiver coil. The system further comprises a controller configured to determine a current of the co-planar first and second receiver coils, a current of the third receiver coil, and a duty cycle of the wireless power transfer receiver device. The controller is configured to enable the co-planar first and second receiver coils, the third receiver coil, or the co-planar first and second receiver coils and the third receiver coil based on a comparison of the current of the co-planar first and second receiver coils, the current of the third receiver coil, and the duty cycle.
29 Citations
41 Claims
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1. A wireless power transfer receiver device for controlling a current supplied to a battery, comprising:
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a first receiver coil; a second receiver coil, the first and second receiver coils substantially co-planar; a third receiver coil, the co-planar first and second receiver coils collectively positioned substantially central to the third receiver coil, the first, second, and third receiver coils configured to electrically connect to a load; and a controller comprising a sensor, the controller configured to determine a current of the co-planar first and second receiver coils, a current of the third receiver coil, and a duty cycle of a power signal received by the wireless power transfer receiver device using the sensor, the controller further configured to enable; the co-planar first and second receiver coils to supply first current to the load, the third receiver coil to supply second current to the load, or the co-planar first and second receiver coils to supply the first current to the load and the third receiver coil to supply the second current to the load based on at least one of a comparison of the current of the co-planar first and second receiver coils with the current of the third receiver coil or a comparison of the current of the co-planar first and second receiver coils with the duty cycle, wherein the first receiver coil, the second receiver coil, and the third receiver coil are implemented in the wireless power transfer receiver for wireless power transfer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for controlling a current supplied to a battery, the method comprising:
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determining a current of co-planar first and second receiver coils, a current of a third receiver coil, and a duty cycle of a power signal received by a wireless power transfer receiver device using a sensor, the co-planar first and second receiver coils collectively positioned substantially central to the third receiver coil; and enabling the co-planar first and second receiver coils to supply first current to a load, the third receiver coil to supply second current to the load, or the co-planar first and second receiver coils to supply the first current to the load and the third receiver coil to supply the second current to the load based on at least one of a comparison of the current of the co-planar first and second receiver coils with the current of the third receiver coil or a comparison of the current of the co-planar first and second receiver coils with the duty cycle, wherein the first receiver coil, the second receiver coil, and the third receiver coil are implemented in a device that is used for wireless power transfer. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus for controlling a current supplied to a battery, the apparatus comprising:
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means for determining a current of co-planar first and second receiver coils, a current of a third receiver coil, and a duty cycle of a power signal received by a wireless power transfer receiver device, the co-planar first and second receiver coils collectively positioned substantially central to the third receiver coil; and means for enabling the co-planar first and second receiver coils to supply first current to a load, the third receiver coil to supply second current to the load, or the co-planar first and second receiver coils to supply the first current to the load and the third receiver coil to supply the second current to the load based on at least one of a comparison of the current of the co-planar first and second receiver coils with the current of the third receiver coil or a comparison of the current of the co-planar first and second receiver coils with the duty cycle, wherein the first receiver coil, the second receiver coil, and the third receiver coil are implemented in the apparatus for wireless power transfer. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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35. A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
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determine a current of co-planar first and second receiver coils, a current of a third receiver coil, and a duty cycle of a power signal received by a wireless power transfer receiver device using a sensor, the co-planar first and second receiver coils collectively positioned substantially central to the third receiver coil; and enable the co-planar first and second receiver coils to supply first current to a load, the third receiver coil to supply second current to the load, or the co-planar first and second receiver coils to supply the first current to the load and the third receiver coil to supply the second current to the load based on at least one of a comparison of the current of the co-planar first and second receiver coils with the current of the third receiver coil or a comparison of the current of the co-planar first and second receiver coils with the duty cycle, wherein the first receiver coil, the second receiver coil, and the third receiver coil are implemented in the apparatus for wireless power transfer. - View Dependent Claims (36, 37, 38, 39, 40, 41)
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Specification