WIRELESS POWER TRANSMITTING APPARATUS, WIRELESS POWER RECEIVING APPARATUS, AND WIRELESS POWER FEEDING SYSTEM
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United States of America Patent
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Issued Date -
Nov 12, 2015
app pub date -
Sep 21, 2011
filing date -
Sep 21, 2011
priority date (Note) -
Abandoned
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Abstract
A wireless power transmitting apparatus (10) is a wireless power transmitting apparatus which transmits electric power in a wireless manner by electromagnetic induction to a power receiving apparatus (20) which is provided with a power reception coil (220) and a fixed capacitance capacitor (230) electrically connected in parallel with the power reception coil. The wireless power transmitting apparatus is provided with: an alternating current power supply (110) which generates alternating current power; a power transmission coil (120) which is electrically connected to the alternating current power supply; a variable capacitance capacitor (130) which is electrically connected in series with the power transmission coil; and a capacitance controlling device (140) which controls a capacitance value of the variable capacitance capacitor to reduce a phase difference between a voltage phase and a current phase of the alternating current power.
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