| 摘要 |
PROBLEM TO BE SOLVED: To change output voltage optionally and improve conversion efficiency by possessing a switch between a plurality of circuit units in each of which a solar battery array and a diode are connected in forward direction, and connecting the solar battery arrays of several circuit units in series at the time of closing of the switch, and connecting them in parallel at the time of opening. SOLUTION: A first circuit unit where a solar battery array 1a and a diode 1b are connected in forward direction and a second circuit unit where a diode 1a and a solar battery array 1B are connected in forward direction are connected by a switch 10. At the time of closing of the switch 10, the solar battery arrays 1A and 1B of both circuit units are connected in series, and the output voltage goes higher to about two times. On the other hand, at the time of opening of the switch 10, both circuit units are connected in parallel, and the output voltage drops to about half the case of series connection. Hereby. the output voltage can be changed properly by the opening/closing operation of the switch 10, and the high-efficiency operation of the inverter and conversion efficiency can be improved. |
