POWER TRANSMISSION DEVICE AND POWER RECEPTION DEVICE
First Claim
1. A power transmission device that transmits electric power to a power reception device, comprising:
- a power transmission coil configured to transmit electric power to a power reception coil of said power reception device in a contactless manner; and
a foreign object detector provided above said power transmission coil, with said power transmission coil being configured to transmit electric power to said power reception coil located above said power transmission coil,said foreign object detector includinga plurality of first coils arranged along an upper surface of said power transmission coil, anda plurality of second coils arranged along said upper surface of said power transmission coil above or below said plurality of first coils, said plurality of second coils being provided to correspond to said plurality of first coils,said plurality of second coils each being arranged to face a corresponding one of the first coils,an outer shape of each of said plurality of first coils and of each of said plurality of second coils being smaller than an outer shape of said power transmission coil when said power transmission coil, said plurality of first coils and said plurality of second coils are viewed two-dimensionally from above said power transmission coil.
2 Assignments
0 Petitions
Accused Products
Abstract
A foreign object detector includes a plurality of first coils and a plurality of second coils. The plurality of first coils are arranged along an upper surface of a power transmission coil. The plurality of second coils are provided to correspond to the plurality of first coils, with the second coils each being arranged to face a corresponding one of the first coils. An outer shape of each of the plurality of first coils and each of the plurality of second coils is smaller than an outer shape of the power transmission coil when the power transmission coil is viewed two-dimensionally from above the power transmission coil.
18 Citations
7 Claims
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1. A power transmission device that transmits electric power to a power reception device, comprising:
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a power transmission coil configured to transmit electric power to a power reception coil of said power reception device in a contactless manner; and a foreign object detector provided above said power transmission coil, with said power transmission coil being configured to transmit electric power to said power reception coil located above said power transmission coil, said foreign object detector including a plurality of first coils arranged along an upper surface of said power transmission coil, and a plurality of second coils arranged along said upper surface of said power transmission coil above or below said plurality of first coils, said plurality of second coils being provided to correspond to said plurality of first coils, said plurality of second coils each being arranged to face a corresponding one of the first coils, an outer shape of each of said plurality of first coils and of each of said plurality of second coils being smaller than an outer shape of said power transmission coil when said power transmission coil, said plurality of first coils and said plurality of second coils are viewed two-dimensionally from above said power transmission coil. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power reception device that receives electric power output from a power transmission device, comprising:
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a power reception coil configured to receive electric power from a power transmission coil of said power transmission device in a contactless manner; and a foreign object detector provided below said power reception coil, with said power reception coil being configured to receive electric power from said power transmission coil located below said power reception coil, said foreign object detector including a plurality of first coils arranged along a lower surface of said power reception coil, and a plurality of second coils arranged along said lower surface of said power reception coil above or below said plurality of first coils, said plurality of second coils being provided to correspond to said plurality of first coils, said plurality of second coils each being arranged to face a corresponding one of the first coils, an outer shape of each of said plurality of first coils and of each of said plurality of second coils being smaller than an outer shape of said power reception coil when said power reception coil, said plurality of first coils and said plurality of second coils are viewed two-dimensionally from below said power reception coil.
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Specification