To provide a capacitor charging apparatus detecting solar cell voltage and solar cell current without requiring to multiply the voltage and the current to obtain power with a simple circuit structure.
The apparatus are mainly configured of a solar cell 1, a converter part 2 and a capacitor part 3. Output power from the solar cell 1 is converted in the converter part 2 and power converted in the converter part 2 is accumulated in the capacitor part 3. A maximum power point sweep part 10 controls input voltage of the converter part 2 to be swept in a prescribed range. A current detecting part 6 detecting charge current to the capacitor part 3 detects a change of charge current to the capacitor part 3 in sweeping. The maximum power point sweep part 10 sets input voltage having the maximum charging current in a pair of input voltage and charging voltage as a maximum power point of the solar cell.
Ryukichi Abe
Takashi Koyama
Hideo Sugai
Kenji Aoki
Hiroshi Nagisawa
Akira Yonezawa
Tsutomu Iitaka
Takehiko Katayose