| 摘要 |
PROBLEM TO BE SOLVED: To improve power transmission efficiency.SOLUTION: A noncontact power transmission device 1 includes N (N is an integer not less than 2) power transmission circuits 10, and a control circuit 11 that controls the N power transmission circuits 10. Each power transmission circuit 10 includes a transmission-side LC tank circuit constituted of a capacitor 102 and a power transmission coil 101 connected in series, and an oscillation circuit 100 that supplies power to the transmission-side LC tank circuit. The power transmission coils 101 of the N power transmission circuits 10 are arranged in a matrix formation. The control circuit 11 controls the phase of each of signals generated by the respective oscillation circuits 100 of the N power transmission circuits 10 so that the following is implemented: the phases of changes in the magnetic fields from at least two power transmission coils 101 of the power transmission coils 101 of the N power transmission circuits 10 are identical at the power reception coil 200 of a power reception circuit 20. |
