| 摘要 |
PROBLEM TO BE SOLVED: To avoid the deterioration of transmission efficiency even if a distance between a power transmission coil and a power receiving coil is varied.SOLUTION: This electromagnetic field resonance power transmission device comprises the power transmission coil, a power transmission device which supplies transmission power to the power transmission coil, the power receiving coil which resonates with the power transmission coil in an electromagnetic field, and a power receiving device which receives power from the power receiving coil, and supplies it to a load. Each of the power transmission coil 10 and the power receiving coil 40 has at least a first-group resonance coil pair which sets two resonance frequencies between the power transmission coil and the power receiving coil as a first group, and a second-group coil pair which sets two resonance frequencies different from the first group of resonance frequencies as a second group. |
