| 摘要 |
PURPOSE:To execute an operation by the maximum efficiency by connecting a load to a main power supplying solar battery, when a voltage-current relation of a load resistance connected to an auxiliary solar battery has satisfied a characteristic set in advance. CONSTITUTION:An AC motor 2 is operated through an AC converting invertor 3 from a main power supplying solar battery 1. In this case, an auxiliary solar battery 5 whose voltage-current characteristic is in a similar relation to the solar battery 1 is used, and a load resistance 6 is connected to this battery. In this state, the time when a relation of a voltage and a current appearing in the load resistance 6 coincides with a characteristic set in advance, for instance, a curve F (a curve connecting the maximum efficiency points) in the figure is detected by control means 7, and a relay 8 is driven. By driving of this relay 8, a switch 4 provided between the main power supplying solar battery 1 and the invertor 3 is closed, and the AC motor 2 is operated by the maximum efficiency. |
