Wireless electric power transmission apparatus
First Claim
1. A wireless electric power transmission apparatus comprising:
- two antennas having the ability to transmit electric power by a non-contact method via resonant magnetic coupling, one of the two antennas being a series resonant circuit, of which the resonant frequency is fs, the other antenna being a parallel resonant circuit, of which the resonant frequency is fp;
an oscillator which is connected to one of the two antennas that transmits RF power; and
a control section which controls a transmission frequency according to the magnitude of the electric power to be transmitted from one of the two antennas to the other,wherein if a coupling coefficient between the two antennas is k, then fs and fp are set so as to satisfy the inequality fs/fp<
−
0.6074×
k2+0.0466×
k+0.9955.
3 Assignments
0 Petitions
Accused Products
Abstract
A wireless electric power transmission apparatus as an embodiment of the present disclosure includes: two antennas having the ability to transmit electric power by a non-contact method via resonant magnetic coupling, one of the two antennas being a series resonant circuit, of which the resonant frequency is fs, the other antenna being a parallel resonant circuit, of which the resonant frequency is fp; an oscillator which is connected to one of the two antennas that transmits RF power; and a control section which controls a transmission frequency according to the magnitude of the electric power to be transmitted from one of the two antennas to the other. If a coupling coefficient between the two antennas is k, then fs and fp are set so as to satisfy the inequality fs/fp<−0.6074×k2+0.0466×k+0.9955.
7 Citations
14 Claims
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1. A wireless electric power transmission apparatus comprising:
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two antennas having the ability to transmit electric power by a non-contact method via resonant magnetic coupling, one of the two antennas being a series resonant circuit, of which the resonant frequency is fs, the other antenna being a parallel resonant circuit, of which the resonant frequency is fp; an oscillator which is connected to one of the two antennas that transmits RF power; and a control section which controls a transmission frequency according to the magnitude of the electric power to be transmitted from one of the two antennas to the other, wherein if a coupling coefficient between the two antennas is k, then fs and fp are set so as to satisfy the inequality fs/fp<
−
0.6074×
k2+0.0466×
k+0.9955. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification