Power receiver, and electronic apparatus and non-contact charger using same
First Claim
Patent Images
1. A power receiver, comprising:
- a power receiving coil having a planar spiral coil;
a rectifier for rectifying an AC voltage generated in the power receiving coil;
a secondary battery to which a DC voltage rectified by the rectifier is charged; and
a flexible magnetic foil arranged in at least one position between the planar spiral coil and the secondary battery and between the planar spiral coil and the rectifier,wherein the flexible magnetic foil comprises a laminate including a plurality of magnetic alloy thin strips laminated directly or through an insulation layer,wherein each of the magnetic alloy thin strips is formed of an amorphous alloy or an Fe-based microcrystalline alloy, and has an average thickness in a range of 5 to 50 μ
m, andwherein a thickness of the laminate is in a range of 500 μ
m or less, and the thickness of the laminate contains a thickness of the insulation layer when the plural magnetic alloy thin strips are laminated through the insulation layer.
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Abstract
An electronic apparatus (1) includes a power receiver (2) and an electronic apparatus main body (3). The power receiver (2) includes a power receiving coil (11) having a spiral coil, a rectifier (12) and a secondary battery (13). The electronic apparatus main body (3) includes an electronic device (14) and a circuit board (15). A magnetic foil (16) is arranged in at least one position between the spiral coil (11) and one of the secondary battery (13), the rectifier (12), the electronic device (14) and the circuit board (15).
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Citations
16 Claims
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1. A power receiver, comprising:
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a power receiving coil having a planar spiral coil; a rectifier for rectifying an AC voltage generated in the power receiving coil; a secondary battery to which a DC voltage rectified by the rectifier is charged; and a flexible magnetic foil arranged in at least one position between the planar spiral coil and the secondary battery and between the planar spiral coil and the rectifier, wherein the flexible magnetic foil comprises a laminate including a plurality of magnetic alloy thin strips laminated directly or through an insulation layer, wherein each of the magnetic alloy thin strips is formed of an amorphous alloy or an Fe-based microcrystalline alloy, and has an average thickness in a range of 5 to 50 μ
m, andwherein a thickness of the laminate is in a range of 500 μ
m or less, and the thickness of the laminate contains a thickness of the insulation layer when the plural magnetic alloy thin strips are laminated through the insulation layer. - View Dependent Claims (2, 3, 4, 5, 15)
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6. An electronic apparatus, comprising:
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a power receiver which is provided with a power receiving coil having a planar spiral coil, a rectifier for rectifying an AC voltage generated in the power receiving coil, and a secondary battery to which a DC voltage rectified by the rectifier is charged; an electronic apparatus main body which is provided with an electronic device operated by the DC voltage supplied from the secondary battery and a circuit board on which the electronic device is mounted; and a flexible magnetic foil arranged in at least one position between the planar spiral coil and the secondary battery, between the planar spiral coil and the rectifier, between the planar spiral coil and the electronic device; and
between the planar spiral coil and the circuit board,wherein the flexible magnetic foil comprises a laminate including a plurality of magnetic alloy thin strips laminated directly or through an insulation layer, wherein each the magnetic alloy thin strips is formed of an amorphous alloy or an Fe-based microcrystalline alloy, and has an average thickness in a range of 5 to 50 μ
m, andwherein a thickness of the laminate is in a range of 500 μ
m or less, and the thickness of the laminate contains a thickness of the insulation-layer when the plural magnetic alloy thin strips are laminated through the insulation layer. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 16)
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Specification