Wireless power transfer system, power transfer apparatus, and power reception apparatus
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United States of America Patent
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Sep 1, 2015
Grant Date -
Mar 8, 2012
app pub date -
Aug 3, 2011
filing date -
Sep 7, 2010
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Abstract
According to one embodiment, a wireless power transfer system performs electrical power transfer and signal communication by magnetic field resonance. A power transfer apparatus includes a first resonator configured to resonate at a predetermined frequency and to switch a Q-factor between high and low, and a first controller configured to set the Q-factor of the first resonator high in the electrical power transfer, and to set the Q-factor of the first resonator low in the signal communication. The power reception apparatus includes a second resonator configured to resonate at the predetermined frequency and to switch a Q-factor between high and low, and a second controller configured to set the Q-factor of the second resonator high when performing the electrical power transfer and to set the Q-factor of the second resonator low when performing the signal communication.
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