COIL UNIT, CONTACTLESS POWER TRANSFER APPARATUS, VEHICLE, AND CONTACTLESS POWER FEEDING SYSTEM
First Claim
1. A coil unit comprising a second self-resonant coil electromagnetically resonating with a spaced, first self-resonant coil to perform at least one of transmitting power to said first self-resonant coil and receiving power from said first self-resonant coil,said second self-resonant coil including a first coil and a plurality of second coils provided inside said first coil,a direction of a magnetic field formed by said first coil being the same as a direction of magnetic fields formed by said second coils.
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Accused Products
Abstract
A coil unit includes a second self-resonant coil electromagnetically resonating with a spaced, first self-resonant coil to perform at least one of transmitting power to the first self-resonant coil and receiving power from the first self-resonant coil, the second self-resonant coil including a first coil and a plurality of second coils provided inside the first coil, the direction of a magnetic field formed by the first coil is the same as those formed by the second coils.
13 Citations
11 Claims
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1. A coil unit comprising a second self-resonant coil electromagnetically resonating with a spaced, first self-resonant coil to perform at least one of transmitting power to said first self-resonant coil and receiving power from said first self-resonant coil,
said second self-resonant coil including a first coil and a plurality of second coils provided inside said first coil, a direction of a magnetic field formed by said first coil being the same as a direction of magnetic fields formed by said second coils.
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11. A contactless power feeding system comprising:
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a first coil unit including a first self-resonant coil; and a second coil unit including a second self-resonant coil electromagnetically resonating with said first self-resonant coil to perform at least one of transmitting power and receiving power, said first self-resonant coil including a first coil and a plurality of second coils provided inside said first coil, said second self-resonant coil including a third coil and a plurality of fourth coils provided inside said third coil, a direction of a magnetic field formed by said first coil being the same as a direction of magnetic fields formed by said second coils, a direction of a magnetic field formed by said third coil being the same as a direction of magnetic fields formed by said fourth coils.
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Specification