RESONANT TYPE TRANSMISSION POWER SUPPLY DEVICE AND RESONANT TYPE TRANSMISSION POWER SUPPLY SYSTEM
First Claim
1. A resonant type transmission power supply device comprising:
- a transmission power state detecting circuit to detect a transmission power state of a transmission antenna;
a foreign object detecting circuit to detect presence or absence of a foreign object in an electromagnetic field generated from said transmission antenna on a basis of a detection result acquired by said transmission power state detecting circuit; and
a power control circuit to reduce or stop supply of electric power to said transmission antenna when a foreign object is detected by said foreign object detecting circuit.
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Accused Products
Abstract
Disclosed is a resonant type transmission power supply device including a transmission power state detecting circuit 11 to detect a transmission power state of a transmission antenna 2, a foreign object detecting circuit 124 to detect the presence or absence of a foreign object in an electromagnetic field generated from the transmission antenna 2 on the basis of a detection result acquired by the transmission power state detecting circuit 11, and a power control circuit 125 to reduce lit or stop the supply of electric power to the transmission antenna 2 when foreign object is detected by the foreign object detecting circuit 124.
58 Citations
7 Claims
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1. A resonant type transmission power supply device comprising:
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a transmission power state detecting circuit to detect a transmission power state of a transmission antenna; a foreign object detecting circuit to detect presence or absence of a foreign object in an electromagnetic field generated from said transmission antenna on a basis of a detection result acquired by said transmission power state detecting circuit; and a power control circuit to reduce or stop supply of electric power to said transmission antenna when a foreign object is detected by said foreign object detecting circuit. - View Dependent Claims (2, 3, 4, 5)
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6. A resonant type transmission power supply system provided with a plurality of resonant type transmission power supply devices each of that controls supply of electric power to a corresponding one of transmission antennas, in which said transmission antennas operate at one fixed frequency, each of said resonant type transmission power supply devices comprising:
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a transmission power state detecting circuit to detect a transmission power state of said corresponding transmission antenna; a foreign object detecting circuit to detect presence or absence of a foreign object in an electromagnetic field generated from said corresponding transmission antenna on a basis of a detection result acquired by said transmission power state detecting circuit; a position detecting circuit to, when a foreign object is detected by said foreign object detecting circuit, detect a position of said foreign object on a basis of a detection result acquired by each of said transmission power state detecting circuits; and a power control circuit to reduce or stop supply of electric power to said corresponding transmission antenna on a basis of the position of the foreign object detected by said position detecting circuit.
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7. A resonant type transmission power supply system provided with a plurality of resonant type transmission power supply devices each of that controls supply of electric power to a corresponding one of transmission antennas, in which said transmission antennas operate at different fixed frequencies, respectively, each of said resonant type transmission power supply devices comprising:
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a transmission power state detecting circuit to detect a transmission power state of said corresponding transmission antenna; a foreign object detecting circuit to detect presence or absence of a foreign object in an electromagnetic field generated from said corresponding transmission antenna on a basis of a detection result acquired by said transmission power state detecting circuit; and a power control circuit to, when a foreign object is detected by said foreign object detecting circuit, determine a type of the foreign object on a basis of both the fixed frequency of each of said plurality of transmission antennas and a detection result acquired by each of said transmission power state detecting circuits, and reduce or stop supply of electric power to said corresponding transmission antenna.
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Specification