Wireless power transfer system coil arrangements and method of operation
First Claim
1. An apparatus for wirelessly transmitting power, the apparatus comprising:
- a first conductive structure configured to generate a first magnetic field based on a first current received from a power source;
a second conductive structure configured to generate a second magnetic field based on a second current from the power source; and
a controller configured to;
supply power to each of the first conductive structure and the second conductive structure, in a sequence, and receive measurements of power contributions made in a third conductive structure configured to receive power via the first or the second magnetic field, and determine a respective coupling coefficient between each of the first and second conductive structures and the third conductive structure using the measurements; and
either balance magnitudes of the first and second currents or balance losses from the first conductive structure and the second conductive structure by controlling at least one of the first or second currents based at least in part on the coupling coefficients.
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Accused Products
Abstract
This disclosure provides systems, methods and apparatus for wireless power transfer. In one aspect, an apparatus for wirelessly transmitting power is provided. The apparatus includes a first conductive structure configured to generate a first magnetic field based on a first current received from a power source. The apparatus further includes a second conductive structure configured to generate a second magnetic field based on a second current from the power source. The apparatus further includes a controller configured to determine a respective coupling coefficient between each of the first and second conductive structures and a third conductive structure configured to receive power via the first or the second magnetic field. The controller is further configured to adjust the first or second current applied to the first and second conductive structures based at least in part on the coupling coefficients.
32 Citations
40 Claims
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1. An apparatus for wirelessly transmitting power, the apparatus comprising:
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a first conductive structure configured to generate a first magnetic field based on a first current received from a power source; a second conductive structure configured to generate a second magnetic field based on a second current from the power source; and a controller configured to; supply power to each of the first conductive structure and the second conductive structure, in a sequence, and receive measurements of power contributions made in a third conductive structure configured to receive power via the first or the second magnetic field, and determine a respective coupling coefficient between each of the first and second conductive structures and the third conductive structure using the measurements; and either balance magnitudes of the first and second currents or balance losses from the first conductive structure and the second conductive structure by controlling at least one of the first or second currents based at least in part on the coupling coefficients. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for wirelessly transmitting power, the method comprising:
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generating a first magnetic field via a first conductive structure based on a first current received from a power source; generating a second magnetic field via a second conductive structure based on a second current from the power source; receiving measurements of power contributions made in a third conductive structure configured to receive power via the first or the second magnetic field, and determining a respective coupling coefficient between each of the first and second conductive structures and the third conductive structure using the measurements; and either balancing magnitudes of the first and second currents or balancing losses from the first conductive structure and the second conductive structure by controlling at least one of the first or second currents based at least in part on the coupling coefficients. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. An apparatus for wirelessly transmitting power, the apparatus comprising:
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a first means for generating a first magnetic field via based on a first current received from a power source; a second means for generating a second magnetic field based on a second current from the power source; means for supplying power to each of the first generating means and the second generating means, in a sequence, and for receiving measurements of power contributions made in a means for receiving power via the first or the second magnetic field, and determining a respective coupling coefficient between each of the first and second generating means and the means for receiving power using the measurements; and means for either balancing magnitudes of the first and second currents or balancing losses from the first generating means and the second generating means by controlling at least one of the first or second currents based at least in part on the coupling coefficients. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40)
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Specification