Load impedance detection for static or dynamic adjustment of passive loads
AssigneeQUALCOMM Incorporated
InventorsCody B. Wheeland, Ryan Tseng, William H Von Novak
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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.
Claims64
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.
An apparatus configured to determine a reactive condition of a wireless power transmitter, the apparatus comprising:
- 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.
An apparatus for operating a wireless power transmitter, comprising:
- 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.
A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
- 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.
Dependencies are inferred from the claim text.