Systems and methods for controlling wireless power transfer
First Claim
1. A method for controlling a wireless power transfer system, the method comprising:
- generating, with a transmit coil, a first magnetic field having a first magnitude;
magnetically coupling a receive coil to the transmit coil to generate a second magnetic field having a second magnitude;
determining, by an electronic processor electrically coupled to the transmit coil and communicatively coupled to the receiving coil, at least one selected from the group consisting of the first magnitude of the first magnetic field and a first current magnitude of a current in the transmit coil;
receiving, by the electronic processor, at least one selected from the group consisting of the second magnitude of the second magnetic field and a second current magnitude of a current in the receive coil;
determining, by the electronic processor, an efficiency based on at least one of the group consisting of the first magnitude, the second magnitude, the first current magnitude, and the second current magnitude;
determining, in response to the efficiency exceeding an efficiency threshold;
a first phase of the first magnetic field;
a second phase of the second magnetic field;
a phase difference based on the first and second phases;
a coil alignment based on the phase difference; and
a power level for the transmit coil based on the efficiency and the coil alignment.
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Accused Products
Abstract
A system and method for wireless power transfer. The system includes a transmit coil having a first magnetic field having a first magnitude. The system also includes a receive coil, magnetically coupled to the transmit coil, having a second magnetic field having a second magnitude. The system also includes an electronic processor electrically coupled to the transmit coil and communicatively coupled to the receive coil. The electronic processor is configured to determine the first magnitude of the first magnetic field. The electronic processor is further configured to receive the second magnitude of the second magnetic field. The electronic processor is further configured to determine an efficiency based on the first magnitude and the second magnitude, and determine a power level for the transmit coil based on the efficiency.
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Citations
14 Claims
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1. A method for controlling a wireless power transfer system, the method comprising:
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generating, with a transmit coil, a first magnetic field having a first magnitude; magnetically coupling a receive coil to the transmit coil to generate a second magnetic field having a second magnitude; determining, by an electronic processor electrically coupled to the transmit coil and communicatively coupled to the receiving coil, at least one selected from the group consisting of the first magnitude of the first magnetic field and a first current magnitude of a current in the transmit coil; receiving, by the electronic processor, at least one selected from the group consisting of the second magnitude of the second magnetic field and a second current magnitude of a current in the receive coil; determining, by the electronic processor, an efficiency based on at least one of the group consisting of the first magnitude, the second magnitude, the first current magnitude, and the second current magnitude; determining, in response to the efficiency exceeding an efficiency threshold; a first phase of the first magnetic field; a second phase of the second magnetic field; a phase difference based on the first and second phases; a coil alignment based on the phase difference; and a power level for the transmit coil based on the efficiency and the coil alignment. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless power transfer system, the system comprising:
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a transmit coil having a first magnetic field having a first magnitude; a receive coil, magnetically coupled to the transmit coil, having a second magnetic field having a second magnitude; and an electronic processor electrically coupled to the transmit coil and communicatively coupled to the receive coil, and configured to determine at least one selected from the group consisting of the first magnitude of the first magnetic field and a first current magnitude of a current in the transmit coil; receive at least one selected from the group consisting of the second magnitude of the second magnetic field and a second current magnitude of a current in the receive coil; determine an efficiency based on at least one of the group consisting of the first magnitude, the second magnitude, the first current magnitude, and the second current magnitude; determine, in response to the efficiency exceeding an efficiency threshold; a first phase of the first magnetic field; a second phase of the second magnetic field; a phase difference based on the first and second phases; a coil alignment based on the phase difference; and a power level for the transmit coil based on the efficiency and the coil alignment. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification