Resonant type power transmission system and resonance type power transmission device
First Claim
1. A resonant type power transmission system comprising:
- a transmission and reception system for power transmission having a first transmission antenna, a first reception antenna, and a first resonant type transmission power supply device configured to control supply of electric power to said first transmission antenna;
a transmission and reception system for foreign object detection having a second transmission antenna whose range of an electromagnetic field generated therefrom overlaps that of an electromagnetic field generated from said first transmission antenna, a second reception antenna, and a second resonant type transmission power supply device configured to supply regular or intermittent small power to said second transmission antenna;
a starting circuit configured to receive the small power from said second reception antenna and start; and
a reception power supply device configured to be started by said starting circuit and receive the electric power from said first reception antenna, whereinsaid second resonant type transmission power supply device comprises;
a transmission power state detecting circuit configured to detect a transmission power state of said second transmission antenna;
a foreign object detecting circuit configured to detect presence or absence of a foreign object in said overlapping range of the electromagnetic fields on a basis of a detection result acquired by said transmission power state detecting circuit; and
a power control circuit configured to control said first resonant type transmission power supply device in such a way as to reduce or stop the supply of the electric power to said first transmission antenna when a foreign object is detected by said foreign object detecting circuit, andsaid resonant type power transmission system further comprises a resonance impedance adjusting circuit configured to match a resonance condition of said second transmission antenna to that of said second reception antenna on a basis of the detection result acquired by said transmission power state detecting circuit.
1 Assignment
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Accused Products
Abstract
A second resonant type transmission power supply device 1b includes a transmission power state detecting circuit 11b that detects a transmission power state of a second transmission antenna 2b, a foreign object detecting circuit 124b that detects the presence or absence of a foreign object in an overlapping range of electromagnetic fields on the basis of a detection result acquired by the transmission power state detecting circuit 11b, and a power control circuit 125b that, when a foreign object is detected by the foreign object detecting circuit 124b, controls a first resonant type transmission power supply device 1a in such a way as to reduce or stop the supply of electric power to a first transmission antenna 2a.
8 Citations
16 Claims
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1. A resonant type power transmission system comprising:
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a transmission and reception system for power transmission having a first transmission antenna, a first reception antenna, and a first resonant type transmission power supply device configured to control supply of electric power to said first transmission antenna; a transmission and reception system for foreign object detection having a second transmission antenna whose range of an electromagnetic field generated therefrom overlaps that of an electromagnetic field generated from said first transmission antenna, a second reception antenna, and a second resonant type transmission power supply device configured to supply regular or intermittent small power to said second transmission antenna; a starting circuit configured to receive the small power from said second reception antenna and start; and a reception power supply device configured to be started by said starting circuit and receive the electric power from said first reception antenna, wherein said second resonant type transmission power supply device comprises; a transmission power state detecting circuit configured to detect a transmission power state of said second transmission antenna; a foreign object detecting circuit configured to detect presence or absence of a foreign object in said overlapping range of the electromagnetic fields on a basis of a detection result acquired by said transmission power state detecting circuit; and a power control circuit configured to control said first resonant type transmission power supply device in such a way as to reduce or stop the supply of the electric power to said first transmission antenna when a foreign object is detected by said foreign object detecting circuit, and said resonant type power transmission system further comprises a resonance impedance adjusting circuit configured to match a resonance condition of said second transmission antenna to that of said second reception antenna on a basis of the detection result acquired by said transmission power state detecting circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13)
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10. A resonance type power transmission device comprising:
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a transmission and reception system for power transmission having a first transmission antenna, a first reception antenna, and a first resonant type transmission power supply device configured to control supply of electric power to said first transmission antenna; and a transmission and reception system for foreign object detection having a second transmission antenna whose range of an electromagnetic field generated therefrom overlaps that of an electromagnetic field generated from said first transmission antenna, a second reception antenna, and a second resonant type transmission power supply device configured to supply regular or intermittent small power to said second transmission antenna, wherein said second resonant type transmission power supply device comprises; a transmission power state detecting circuit configured to detect a transmission power state of said second transmission antenna; a foreign object detecting circuit configured to detect presence or absence of a foreign object in said overlapping range of the electromagnetic fields on a basis of a detection result acquired by said transmission power state detecting circuit; and a power control circuit configured to control said first resonant type transmission power supply device in such a way as to reduce or stop the supply of the electric power to said first transmission antenna when a foreign object is detected by said foreign object detecting circuit, and said resonance type power transmission device further comprises a resonance impedance adjusting circuit configured to match a resonance condition of said second transmission antenna to that of said second reception antenna on a basis of the detection result acquired by said transmission power state detecting circuit. - View Dependent Claims (14, 15, 16)
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Specification