ELECTRIC POWER RECEIVING APPARATUS, METHOD OF CONTROLLING THE SAME, AND ELECTRIC POWER FEEDING SYSTEM INCLUDING THE SAME
First Claim
1. An electric power receiving apparatus, comprising:
- an electric power receiving coil disposed in a position where a receiving voltage is induced by a magnetic field from an electric power feeding apparatus;
a measuring coil disposed in a position where a monitoring induced voltage as a voltage corresponding to the receiving voltage is induced by the magnetic field; and
a foreign object detecting portion generating an amount of change in an impedance of said electric power receiving coil from the monitoring induced voltage and an induced current of said electric power receiving coil, thereby detecting a foreign object in the magnetic field based on the amount of change.
1 Assignment
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Accused Products
Abstract
An electric power receiving apparatus including: an electric power receiving coil disposed in a position where a receiving voltage is induced by a magnetic field from an electric power feeding apparatus; a measuring coil disposed in a position where a monitoring induced voltage as a voltage corresponding to the receiving voltage is induced by the magnetic field; and a foreign object detecting portion generating an amount of change in an impedance of the electric power receiving coil from the monitoring induced voltage and an induced current of the electric power receiving coil, thereby detecting a foreign object in the magnetic field based on the amount of change.
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Citations
15 Claims
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1. An electric power receiving apparatus, comprising:
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an electric power receiving coil disposed in a position where a receiving voltage is induced by a magnetic field from an electric power feeding apparatus; a measuring coil disposed in a position where a monitoring induced voltage as a voltage corresponding to the receiving voltage is induced by the magnetic field; and a foreign object detecting portion generating an amount of change in an impedance of said electric power receiving coil from the monitoring induced voltage and an induced current of said electric power receiving coil, thereby detecting a foreign object in the magnetic field based on the amount of change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of controlling an electric power receiving apparatus, comprising:
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generating an amount of change in an impedance of an electric power receiving coil from a monitoring induced voltage in a measuring coil disposed in a position where the monitoring induced voltage as a voltage corresponding to a receiving voltage is induced by a magnetic field, and an induced current of a receiving coil disposed in a position where the receiving voltage is induced by a magnetic field from an electric power feeding apparatus by a foreign object detecting portion; and detecting a foreign object in the magnetic field based on the amount of change by said foreign object detecting portion.
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15. An electric power feeding system, comprising:
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an electric power feeding apparatus supplying a power source through a magnetic field; and an electric power receiving apparatus including an electric power receiving coil disposed in a position where a receiving voltage is induced by the magnetic field, a measuring coil disposed in a position where a monitoring induced voltage as a voltage corresponding to the receiving voltage is induced by the magnetic field, and a foreign object detecting portion generating an amount of change in an impedance of said electric power receiving coil from the monitoring induced voltage and an induced current of said electric power receiving coil, thereby detecting a foreign object in the magnetic field based on the amount of change.
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Specification