Power receiving device, and electronic apparatus and non-contact charger using the same
First Claim
1. A power receiving device, comprising:
- a power receiving coil having a spiral coil;
a rectifier rectifying an alternating voltage generated in the power receiving coil;
a secondary battery to which a direct-current voltage rectified in the rectifier is charged; and
a magnetic foil arranged in at least one of a position between the spiral coil and the secondary battery, and a position between the spiral coil and the rectifier,wherein the magnetic foil comprises an amorphous alloy thin ribbon or an iron-based Microcrystalline alloy thin ribbon having an average thickness in a range of 5 to 50 μ
m,wherein the magnetic foil has a Ms·
t value of 15 or more and 103.68 or less, where Ms [T] is a saturation flux density of the magnetic foil, t [μ
m] is a plate thickness of the the magnetic foil, and the Ms·
t value [T·
μ
m] is a product of the saturation flux density Ms and the plate thickness t,wherein the power receiving coil has a power receiving rate of 0.25 W/h or more.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is an electronic apparatus (1) comprising a power receiving device (2) and an electronic apparatus main body (3). The power receiving device (2) comprises a power receiving coil (11) having a spiral coil, a rectifier (12) and a secondary battery (13). The electronic apparatus main body (3) comprises 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 the secondary battery (13), the rectifier (12), the electronic device (14) or the circuit board (15). The magnetic foil (16) has a value expressed as the product of the saturation flux density MS and the thickness t, namely Ms·t, of not less than 15.
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Citations
17 Claims
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1. A power receiving device, comprising:
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a power receiving coil having a spiral coil; a rectifier rectifying an alternating voltage generated in the power receiving coil; a secondary battery to which a direct-current voltage rectified in the rectifier is charged; and a magnetic foil arranged in at least one of a position between the spiral coil and the secondary battery, and a position between the spiral coil and the rectifier, wherein the magnetic foil comprises an amorphous alloy thin ribbon or an iron-based Microcrystalline alloy thin ribbon having an average thickness in a range of 5 to 50 μ
m,wherein the magnetic foil has a Ms·
t value of 15 or more and 103.68 or less, where Ms [T] is a saturation flux density of the magnetic foil, t [μ
m] is a plate thickness of the the magnetic foil, and the Ms·
t value [T·
μ
m] is a product of the saturation flux density Ms and the plate thickness t,wherein the power receiving coil has a power receiving rate of 0.25 W/h or more. - View Dependent Claims (2, 3, 4, 5, 6, 16)
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7. An electronic apparatus, comprising:
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a power receiving device which is provided with a power receiving coil having a spiral coil, a rectifier rectifying an alternating voltage generated in the power receiving coil, and a secondary battery to which a direct-current voltage rectified in the rectifier is charged; an electronic apparatus body which is provided with an electronic device which is operated by the direct-current voltage supplied from the secondary battery, and a circuit board on which the electronic device is mounted; and a magnetic foil arranged in at least one of a position between the spiral coil and the secondary battery, a position between the spiral coil and the rectifier, a position between the spiral coil and the electronic device, and a position between the spiral coil and the circuit board, wherein the magnetic foil comprises an amorphous alloy thin ribbon or an iron-based Microcrystalline alloy thin ribbon having an average thickness in a range of 5 to 50 μ
m,wherein the magnetic foil has a Ms·
t value of 15 or more and 103.68 or less, where Ms [T] is a saturation flux density of the magnetic foil, t [μ
m] is a plate thickness of the the magnetic foil, and the Ms·
t value [T·
μ
m] is a product of the saturation flux density Ms and the plate thickness t,wherein the power receiving coil has a power receiving rate of 0.25 W/h or more. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 17)
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Specification