Electric power supply system for vehicle including a power receiving antenna
First Claim
1. An electric power supply system for vehicle comprising:
- at least one power transmitting antenna, which is arranged on or under the ground, anda power receiving antenna, which is arranged in or on at least one vehicle,wherein the power transmitting and receiving antennas form a pair of resonators that couples with each other by producing resonant magnetic coupling between them, andwherein supposing that the direction in which the vehicle is traveling is Y direction and the direction perpendicular to the Y direction is X direction,the lengths of the power transmitting antenna as measured in the Y and X directions are greater than those of the power receiving antenna as measured in the Y and X directions, respectively, andthe length of the power receiving antenna as measured in the X direction is greater than its length as measured in the Y direction, andthe lengths of the power transmitting antenna as measured in the Y and X directions are greater than those of the vehicle as measured in the Y and X directions, respectively, andwherein power is supplied from the power transmitting antenna to the power receiving antenna by a non-contact method when the power transmitting antenna faces the power receiving antenna, andwherein while power transmission is carried out between the power transmitting antenna and the power receiving antenna, the entire power receiving antenna projected onto the plane defined by the outer periphery of the power transmitting antenna is positioned inside the outer periphery of the power transmitting antenna.
1 Assignment
0 Petitions
Accused Products
Abstract
To stabilize the transmission characteristic of an electric power supply system for vehicle even when the vehicle being charged and powered by it shifts horizontally, a power transmitting antenna, which is arranged on the ground, and a power receiving antenna, which is arranged at the bottom of the vehicle, set up resonances at substantially the same resonant frequency and produce magnetic resonant coupling between them. When the power receiving antenna enters the zone in which the power transmitting antenna is located, power is transmitted to the vehicle. By setting the width of the power receiving antenna as measured in the vehicle'"'"'s width direction to be larger than the length of the power receiving antenna as measured in the vehicle'"'"'s traveling direction, the transmission characteristic can be stabilized.
22 Citations
19 Claims
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1. An electric power supply system for vehicle comprising:
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at least one power transmitting antenna, which is arranged on or under the ground, and a power receiving antenna, which is arranged in or on at least one vehicle, wherein the power transmitting and receiving antennas form a pair of resonators that couples with each other by producing resonant magnetic coupling between them, and wherein supposing that the direction in which the vehicle is traveling is Y direction and the direction perpendicular to the Y direction is X direction, the lengths of the power transmitting antenna as measured in the Y and X directions are greater than those of the power receiving antenna as measured in the Y and X directions, respectively, and the length of the power receiving antenna as measured in the X direction is greater than its length as measured in the Y direction, and the lengths of the power transmitting antenna as measured in the Y and X directions are greater than those of the vehicle as measured in the Y and X directions, respectively, and wherein power is supplied from the power transmitting antenna to the power receiving antenna by a non-contact method when the power transmitting antenna faces the power receiving antenna, and wherein while power transmission is carried out between the power transmitting antenna and the power receiving antenna, the entire power receiving antenna projected onto the plane defined by the outer periphery of the power transmitting antenna is positioned inside the outer periphery of the power transmitting antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A vehicle for use in an electric power supply system for vehicle, the electric power supply system comprising:
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at least one power transmitting antenna, which is arranged on or under the ground, and a power receiving antenna, which is arranged in or on at least one vehicle, wherein the power transmitting and receiving antennas form a pair of resonators that couples with each other by producing resonant magnetic coupling between them, and wherein supposing that the direction in which the vehicle is traveling is Y direction and the direction perpendicular to the Y direction is X direction, the lengths of the power transmitting antenna as measured in the Y and X directions are greater than those of the power receiving antenna as measured in the Y and X directions, respectively, and the length of the power receiving antenna as measured in the X direction is greater than its length as measured in the Y direction, and the lengths of the power transmitting antenna as measured in the Y and X directions are greater than those of the vehicle as measured in the Y and X directions, respectively, and wherein power is supplied from the power transmitting antenna to the power receiving antenna by a non-contact method when the power transmitting antenna faces the power receiving antenna, and wherein while power transmission is carried out between the power transmitting antenna and the power receiving antenna, the entire power receiving antenna projected onto the plane defined by the outer periphery of the power transmitting antenna is positioned inside the outer periphery of the power transmitting antenna, the vehicle comprising; the power receiving antenna, and a load to be energized with the energy that the power receiving antenna has received from the power transmitting antenna. - View Dependent Claims (16, 17)
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18. A power transmitting antenna for use in an electric power supply system for vehicle, the electric power supply system comprising:
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at least one power transmitting antenna, which is arranged on or under the ground, and a power receiving antenna, which is arranged in or on at least one vehicle, wherein the power transmitting and receiving antennas form a pair of resonators that couples with each other by producing resonant magnetic coupling between them, and wherein supposing that the direction in which the vehicle is traveling is Y direction and the direction perpendicular to the Y direction is X direction, the lengths of the power transmitting antenna as measured in the Y and X directions are greater than those of the power receiving antenna as measured in the Y and X directions, respectively, and the length of the power receiving antenna as measured in the X direction is greater than its length as measured in the Y direction, and the lengths of the power transmitting antenna as measured in the Y and X directions are greater than those of the vehicle as measured in the Y and X directions, respectively, and wherein power is supplied from the power transmitting antenna to the power receiving antenna by a non-contact method when the power transmitting antenna faces the power receiving antenna, and wherein while power transmission is carried out between the power transmitting antenna and the power receiving antenna, the entire power receiving antenna projected onto the plane defined by the outer periphery of the power transmitting antenna is positioned inside the outer periphery of the power transmitting antenna.
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19. A power receiving system comprising:
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a power receiving antenna for use in an electric power supply system for vehicle; and a power converting section for converting RF energy that the power receiving antenna has received from the power transmitting antenna into DC energy or AC energy, of which the frequency is lower than that of the RF energy, and outputting the DC energy or the AC energy, wherein the electric power supply system comprises; at least one power transmitting antenna, which is arranged on or under the ground, and a power receiving antenna, which is arranged in or on at least one vehicle, wherein the power transmitting and receiving antennas form a pair of resonators that couples with each other by producing resonant magnetic coupling between them, and wherein supposing that the direction in which the vehicle is traveling is Y direction and the direction perpendicular to the Y direction is X direction, the lengths of the power transmitting antenna as measured in the Y and X directions are greater than those of the power receiving antenna as measured in the Y and X directions, respectively, the length of the power receiving antenna as measured in the X direction is greater than its length as measured in the Y direction, and the lengths of the power transmitting antenna as measured in the Y and X directions are greater than those of the vehicle as measured in the Y and X directions, respectively, and wherein power is supplied from the power transmitting antenna to the power receiving antenna by a non-contact method when the power transmitting antenna faces the power receiving antenna, and wherein while power transmission is carried out between the power transmitting antenna and the power receiving antenna, the entire power receiving antenna projected onto the plane defined by the outer periphery of the power transmitting antenna is positioned inside the outer periphery of the power transmitting antenna.
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Specification