| abstract |
Deformation of an annular transmission coil can be suppressed, and a decrease in transmission efficiency in non-contact power transmission can be suppressed. A power transmitting apparatus transmits power in water to a power receiving apparatus having a power receiving coil. The power transmission device 100 is disposed in an inner space of one or more annular coils CL including a power transmission coil CLA that transmits power to the power receiving coil CLB via a magnetic field, and the coil CL formed by the annular coil CL. A bobbin bn that has an outer periphery along the inner periphery of the annular coil CL, supports the coil CL from the inside, a power transmission circuit 150 that transmits AC power to the power transmission coil CLA, and is connected to the coil CL; And a capacitor CA that forms a resonance circuit 152 that resonates with CL. [Selection] Figure 1 |