Electric power transmission device and electric power transmission method
First Claim
1. An electric power transmission device which wirelessly transmits an electric power in a conducting medium characterized in thatthe electric power transmission device includes a power transmitting unit which wirelessly transmits an electric power and a power receiving unit which receives the electric power transmitted from the power transmitting unit,the power transmitting unit and the power receiving unit include an inclusion unit which includes a coil for electric power transmission and a dielectric material covering the coil for electric power transmission,at least one of the power transmitting unit and the power receiving unit includes an impedance adjustment unit which varies the impedance thereof, andthe electric power is transmitted at a resonance frequency determined by an impedance of the power transmitting unit, an impedance of the power receiving unit, and an impedance of the conducting medium,wherein a relation of 30>
- C3*d/(C1+C2)>
0.5 is satisfied wherein C1 is a capacitive component (C1 [pF]) of which the impedance of the power transmitting unit is composed, C2 is a capacitive component (C2 [pF]) of which the impedance of the power receiving unit is composed, C3 is a capacitive component (C3 [pF]) formed by the power transmitting unit, the power receiving unit, and the conducting medium, and d is a distance (d [cm]) between the power transmitting unit and the power receiving unit.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric power transmission device characterized in that the electric power transmission device includes a power transmitting unit which wirelessly transmits an electric power and a power receiving unit which receives the electric power, the power transmitting unit and the power receiving unit include a coil for electric power transmission and an inclusion unit made of a dielectric material covering the coil for electric power transmission, at least one of the power transmitting unit and the power receiving unit includes an impedance adjustment unit which varies the impedance thereof, and the electric power is transmitted at a resonance frequency determined by an impedance of the power transmitting unit, an impedance of the power receiving unit, and an impedance of the conducting medium.
10 Citations
8 Claims
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1. An electric power transmission device which wirelessly transmits an electric power in a conducting medium characterized in that
the electric power transmission device includes a power transmitting unit which wirelessly transmits an electric power and a power receiving unit which receives the electric power transmitted from the power transmitting unit, the power transmitting unit and the power receiving unit include an inclusion unit which includes a coil for electric power transmission and a dielectric material covering the coil for electric power transmission, at least one of the power transmitting unit and the power receiving unit includes an impedance adjustment unit which varies the impedance thereof, and the electric power is transmitted at a resonance frequency determined by an impedance of the power transmitting unit, an impedance of the power receiving unit, and an impedance of the conducting medium, wherein a relation of 30> - C3*d/(C1+C2)>
0.5 is satisfied wherein C1 is a capacitive component (C1 [pF]) of which the impedance of the power transmitting unit is composed, C2 is a capacitive component (C2 [pF]) of which the impedance of the power receiving unit is composed, C3 is a capacitive component (C3 [pF]) formed by the power transmitting unit, the power receiving unit, and the conducting medium, and d is a distance (d [cm]) between the power transmitting unit and the power receiving unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- C3*d/(C1+C2)>
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8. An electric power transmission method in which an electric power is wirelessly transmitted in a conducting medium by a power transmitting unit and a power receiving unit, each of which includes a coil for electric power transmission that is covered by a dielectric material, characterized in that
the power transmitting unit wirelessly transmits the electric power, the power receiving unit receives the transmitted electric power, at least one of the impedance of the power transmitting unit and the impedance of the power receiving unit is compensated, and the electric power is transmitted at a resonance frequency determined by the impedance of the power transmitting unit, the impedance of the power receiving unit, and the impedance of the conducting medium, wherein a relation of 30> - C3*d/(C1+C2)>
0.5 is satisfied wherein C1 is a capacitive component (C1 [pF]) of which the impedance of the power transmitting unit is composed, C2 is a capacitive component (C2 [pF]) of which the impedance of the power receiving unit is composed, C3 is a capacitive component (C3 [pF]) formed by the power transmitting unit, the power receiving unit, and the conducting medium, and d is a distance (d [cm]) between the power transmitting unit and the power receiving unit.
- C3*d/(C1+C2)>
Specification