| 摘要 |
PROBLEM TO BE SOLVED: To provide a contactless power supply system capable of outputting a constant current from a power reception apparatus even if the impedance of a load changes, regardless of the length of a transmission line.SOLUTION: In a contactless power supply system C, a power transmission apparatus A includes: a high frequency power supply device 4 outputting a constant high frequency voltage; a power transmission unit 11 including a power transmission coil L11 connected to the high frequency power supply device 4 and a resonance capacitor C11 connected in series to the power transmission coil L11; a transmission line 6 connecting between the high frequency power supply device 4 and the power transmission unit 11; and a reactance element 7 connected in series to the transmission line 6 and having the same reactance as the reactance component of the transmission line 6 and a polarity opposite to the reactance component. A power reception apparatus B includes a power reception unit 21 including a power reception coil L21 magnetically connected to power transmission coil L11 and a resonance capacitor C21 connected in series to the power reception coil L21. A magnetic field resonance method is used as a power transmission method from the power transmission unit 11 to the power reception unit 21.SELECTED DRAWING: Figure 1 |
