Load impedance detection for static or dynamic adjustment of passive loads
First Claim
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1. A method of operating a wireless power transmitter, the method comprising:
- determining a characteristic correlated to a voltage of a terminal of a switching element of a driver circuit of the wireless power transmitter; and
determining a reactance of a load based on the determined characteristic.
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Abstract
This disclosure provides systems, methods and apparatus for detecting an impedance of a wireless power transmitter load. In one aspect, a method of determining a reactive condition of a wireless power transmitter apparatus is provided. The method comprises determining a value correlated to a voltage of a drain of a switching element of a driver circuit of the wireless power transmitter. The method further comprises determining a reactance load change based on the determined voltage.
24 Citations
64 Claims
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1. A method of operating a wireless power transmitter, the method comprising:
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determining a characteristic correlated to a voltage of a terminal of a switching element of a driver circuit of the wireless power transmitter; and determining a reactance of a load based on the determined characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus configured to determine a reactive condition of a wireless power transmitter, the apparatus comprising:
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a first circuit configured to determine a characteristic correlated to a voltage of a terminal of a switching element of a driver circuit of the wireless power transmitter; and a second circuit configured to determine a reactance of a load based on the determined characteristic. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. An apparatus for operating a wireless power transmitter, comprising:
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means for determining a characteristic correlated to a voltage of a terminal of a switching element of a driver circuit of the wireless power transmitter; and means for determining a reactance of a load based on the determined characteristic. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
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determine a characteristic correlated to a voltage of a terminal of a switching element of a driver circuit of a wireless power transmitter; and determine a reactance of a load based on the determined characteristic. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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Specification