Over voltage protection detection
First Claim
1. A wireless power transmitter comprising:
- a resonator configured to generate a wireless field for wirelessly transferring power to a wireless power receiver;
an impedance detector configured to measure an impedance of the resonator; and
a controller configured to detect operation of an over voltage protection mode of the wireless power receiver based on a frequency of change in impedance as measured by the impedance detector, wherein the controller is further configured to adjust a strength of the wireless field and detect a correlation between the frequency of change in impedance and the adjusted strength of the wireless field, wherein the detected operation of the over voltage protection mode is based on the detected correlation.
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Accused Products
Abstract
Certain aspects of the present disclosure relate to methods and apparatus for detecting, by a wireless power transmitter, an over voltage protection at a wireless power receiver. Certain aspects of the present disclosure provide a wireless power transmitter. The wireless power transmitter includes a resonator configured to generate a wireless field for wirelessly transferring power to a wireless power receiver. The wireless power transmitter further includes an impedance detector configured to measure an impedance of the resonator. The wireless power transmitter further includes a controller configured to detect operation of an over voltage protection mode of the wireless power receiver based on a frequency of change in impedance as measured by the impedance detector.
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Citations
27 Claims
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1. A wireless power transmitter comprising:
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a resonator configured to generate a wireless field for wirelessly transferring power to a wireless power receiver; an impedance detector configured to measure an impedance of the resonator; and a controller configured to detect operation of an over voltage protection mode of the wireless power receiver based on a frequency of change in impedance as measured by the impedance detector, wherein the controller is further configured to adjust a strength of the wireless field and detect a correlation between the frequency of change in impedance and the adjusted strength of the wireless field, wherein the detected operation of the over voltage protection mode is based on the detected correlation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for detecting an over voltage protection mode of a wireless power receiver, the method comprising:
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generating a wireless field for wirelessly transferring power to the wireless power receiver using a resonator; measuring an impedance of the resonator; detecting operation of the over voltage protection mode of the wireless power receiver based on a frequency of change of the measured impedance; and adjusting a strength of the wireless field and detecting a correlation between the frequency of change of the measured impedance and the adjusted strength of the wireless field, wherein detecting operation of the over voltage protection mode is based on the detected correlation. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A wireless power transmitter comprising:
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means for generating a wireless field for wirelessly transferring power to a wireless power receiver; means for measuring an impedance of the means for generating; means for detecting operation of an over voltage protection mode of the wireless power receiver based on a frequency of change of the measured impedance; and means for adjusting a strength of the wireless field and means for detecting a correlation between the frequency of change of the measured impedance and the adjusted strength of the wireless field, wherein detecting operation of the over voltage protection mode is based on the detected correlation. - View Dependent Claims (26, 27)
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Specification