FEED UNIT AND FEED SYSTEM
First Claim
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1. A feed unit comprising:
- a power transmission coil configured to perform power transmission using a magnetic field;
a coupling coefficient calculation section configured to calculate a coupling coefficient between the power transmission coil and a power reception coil in a unit to be fed with power, whereinthe coupling coefficient calculation section measures frequency characteristics of input impedance in a non-operating state of a rectification circuit in the unit to be fed with power, and uses a measurement result of the frequency characteristics to calculate the coupling coefficient.
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Abstract
A feed unit includes: a power transmission coil configured to perform power transmission using a magnetic field; a coupling coefficient calculation section configured to calculate a coupling coefficient between the power transmission coil and a power reception coil in a unit to be fed with power. The coupling coefficient calculation section measures frequency characteristics of input impedance in a non-operating state of a rectification circuit in the unit to be fed with power, and uses a measurement result of the frequency characteristics to calculate the coupling coefficient.
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Citations
20 Claims
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1. A feed unit comprising:
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a power transmission coil configured to perform power transmission using a magnetic field; a coupling coefficient calculation section configured to calculate a coupling coefficient between the power transmission coil and a power reception coil in a unit to be fed with power, wherein the coupling coefficient calculation section measures frequency characteristics of input impedance in a non-operating state of a rectification circuit in the unit to be fed with power, and uses a measurement result of the frequency characteristics to calculate the coupling coefficient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A feed system provided with one or a plurality of electronic apparatuses and a feed unit, the one or the plurality of electronic apparatuses each having a power reception coil and a rectification circuit, the feed unit being configured to perform power transmission using a magnetic field to the electronic apparatuses, the feed unit comprising:
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a power transmission coil configured to perform the power transmission; a coupling coefficient calculation section configured to calculate a coupling coefficient between the power transmission coil and the power reception coil, wherein the coupling coefficient calculation section measures frequency characteristics of input impedance in a non-operating state of the rectification circuit, and uses a measurement result of the frequency characteristics to calculate the coupling coefficient.
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Specification