POWER FEED SYSTEM
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Abstract
Disclosed is a power feed system which can highly efficiently feed power to a power receiving unit from a power feed-side even though distance fluctuation or lateral shift occurs between a power feed-side helical coil and a power receiving-side helical coil. A distance measuring unit measures a inter-coil distance L1 between the power feed-side helical coil and the power receiving-side helical coil, and a control units, adjust capacitances of a power feed-side varactor and a power receiving-side varactor in accordance with the inter-coil distance L1 measured by the measuring unit.
5 Citations
12 Claims
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1-8. -8. (canceled)
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9. A power feed system, comprising:
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a power feeding unit provided with a power feed-side loop antenna for receiving power, and a power feed-side coil electromagnetically coupled with the power feed-side loop antenna; and a power receiving unit provided with a power receiving-side coil electromagnetically resonated with the power feed-side coil, and a power receiving-side loop antenna electromagnetically coupled with the power receiving-side coil, wherein at least one of the power feed-side loop antenna and the power receiving-side loop antenna is divided into a plurality of members, the plurality of members is moved, and a contact position relative to each other is changed, so as to vary a dimension of a loop, and wherein the plurality of members is intersected, overlaid, and contacted to each other so as to form a loop. - View Dependent Claims (10)
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11. A power feed system, comprising:
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a power feeding unit provided with a power feed-side loop antenna for receiving power, and a power feed-side coil electromagnetically coupled with the power feed-side loop antenna; and a power receiving unit provided with a power receiving-side coil electromagnetically resonated with the power feed-side coil, and a power receiving-side loop antenna electromagnetically coupled with the power receiving-side coil, wherein at least one of the power feed-side loop antenna and the power receiving-side loop antenna is divided into a plurality of members, the plurality of members is moved, and a contact position relative to each other is changed, so as to vary a dimension of a loop thereof, an actuator for driving the plurality of members; a reflection measuring unit for measuring a reflection amount from the power fed from the feed-side coil to the power receiving-side coil; and an actuator control unit for controlling the actuator to move the plurality of members in accordance with the reflection amount measured by the reflection measuring unit. - View Dependent Claims (12)
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Specification