SYSTEMS AND METHODS FOR DETECTING WIRELESS CHARGING TRANSMIT CHARACTERISTICS
First Claim
1. A method of detecting a transmit characteristic in a wireless power transmission device comprising a series element electrically coupled to a transmit coil, comprising:
- determining real and imaginary components of a first voltage at a first terminal of the series element;
determining real and imaginary components of a second voltage at a second terminal of the series element;
determining real and imaginary components of a current through the series element, based on the measured first and second voltages;
determining a transmit characteristic based on the measured voltages and determined current; and
adjusting a characteristic of a wireless power transmission based on the calculated transmit characteristic.
1 Assignment
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Accused Products
Abstract
This disclosure provides systems, methods and apparatus for detecting wireless charging transmit characteristics. One aspect of the disclosure provides a method of detecting a transmit characteristic in a wireless power transmission device. The device includes a series element electrically coupled to a transmit coil. The method includes determining real and imaginary components of a first voltage at a first terminal of the series element. The method further includes determining real and imaginary components of a second voltage at a second terminal of the series element. The method further includes determining real and imaginary components of a current through the series element, based on the determined first and second voltages. The method further includes determining transmit characteristics such as nodal voltages, currents, power and impedances based on determined voltages and currents. The method further includes adjusting a characteristic of a wireless power transmission based on the determined transmit characteristics.
45 Citations
42 Claims
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1. A method of detecting a transmit characteristic in a wireless power transmission device comprising a series element electrically coupled to a transmit coil, comprising:
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determining real and imaginary components of a first voltage at a first terminal of the series element; determining real and imaginary components of a second voltage at a second terminal of the series element; determining real and imaginary components of a current through the series element, based on the measured first and second voltages; determining a transmit characteristic based on the measured voltages and determined current; and adjusting a characteristic of a wireless power transmission based on the calculated transmit characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless device configured to provide wireless power to a receiver comprising:
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a transmit coil configured to transmit wireless power; a quadrature clock generator configured to generate in-phase (I) and quadrature (Q) clock signals; a series element, electrically coupled to the transmit coil, comprising first and second terminals or ports; a mixer or set of mixers configured to multiply at least one signal at the first and second terminals or ports of the series element by one of the I and Q signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An apparatus for detecting a transmit characteristic in a wireless power transmission device comprising a series element electrically coupled to a transmit coil, comprising:
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means for determining real and imaginary components of a first voltage at a first terminal of the series element; means for determining real and imaginary components of a second voltage at a second terminal of the series element; means for determining real and imaginary components of a current through the series element, based on the measured first and second voltages; means for determining a transmit characteristic based on the measured voltages and determined current; and means for adjusting a characteristic of a wireless power transmission based on the calculated transmit characteristic. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
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determine real and imaginary components of a first voltage at a first terminal of a series element electrically coupled to a transmit coil; determine real and imaginary components of a second voltage at a second terminal of the series element; determine real and imaginary components of a current through the series element, based on the measured first and second voltages; determine a transmit characteristic based on the measured voltages and determined current; and adjust a characteristic of a wireless power transmission based on the calculated transmit characteristic. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification