Dynamic resonant matching circuit for wireless power receivers
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United States of America Patent
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Jul 4, 2017
Grant Date -
Jul 10, 2014
app pub date -
Aug 6, 2012
filing date -
Aug 16, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A resonant matching circuit (310) for matching a resonant frequency of a wireless power transfer system to a frequency of a power signal comprises a switch (311) connected in parallel with a resonant element (302) of the wireless power transfer system; and a controller (312) connected to the switch (311) and configured to detect a zero-voltage level crossing of a signal flowing through the resonant element (302) and to close the switch (311) for a predefined amount of time upon detection of the zero-voltage level crossing, wherein closing the switch (311) for the predefined amount of time adds any one of an inductive value and a capacitive value to the resonant frequency of a wireless power transfer system.
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International Classification(s)
- H02J:CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR D....
- H01P:WAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF ....
- H04B:TRANSMISSION
- H03H:IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONA....
- H01F:MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF M....
- H03J:TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCU....
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