| 摘要 |
PROBLEM TO BE SOLVED: To provide a controller capable of easily estimating power transmission efficiency.SOLUTION: A controller according to an embodiment of the invention estimates the power transmission efficiency between a power transmission unit which includes a first coil and a first capacity connected in parallel/series to the first coil, and a power reception unit that includes a second coil and a second capacity connected in parallel/series to the second coil and receives the power from the power transmission unit via the connection between the first coil and the second coil. The controller has an estimation section that estimates the power transmission efficiency by comparing a first voltage detected at a first point in the power transmission unit and a second voltage detected at a second point in the power reception unit, or by comparing a first current detected at the first point in the power transmission unit and a second current detected at the second point in the power reception unit. |
