Title:
Wireless electric power transmission equipment
Document Type and Number:
Japanese Patent JP6111625
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a wireless power transmission device that allows maintaining a desired power-receiving voltage while reducing variation in frequencies excellent in power transmission efficiency even if the distance between a power-feeding coil and a power-receiving coil is changed.SOLUTION: A wireless power transmission device 100 includes a power-feeding coil L1, a power-supply circuit 120, a power-receiving coil L2, a capacitor C2, and a load circuit RL. The power-supply circuit 120 includes a power-supply VG, a voltage conversion circuit 140, and a current detection circuit 130 detecting a current value of a current flowing through an input side or an output side of the voltage conversion circuit 140. The voltage conversion circuit 140 has a voltage conversion section 150 transforming an input voltage supplied from the power supply VG, and a transformation control section 160 connected to the voltage conversion section 150. The transformation control section 160 controls a voltage value transformed by the voltage conversion section 150 on the basis of the detected current value detected by the current detection circuit 130.
Inventors:
Akira Gotani
Mitsuru Suzuki
Mitsuru Suzuki
Application Number:
JP2012265464A
Publication Date:
April 12, 2017
Filing Date:
December 04, 2012
Export Citation:
Assignee:
tdk Corporation
International Classes:
H02J7/00; H02J50/10; H01M10/44; H01M10/46; H01M10/48; H02J50/12
Domestic Patent References:
| JP2012152041A | ||||
| JP2009101884A | ||||
| JP2002369544A | ||||
| JP2004248380A |