| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To control variation of a solar cell voltage by raising accuracy of tracking control to the maximum power generation point when a low daylight amount is detected. <P>SOLUTION: A control circuit 10 reads and holds a solar cell voltage from a solar cell voltage detector 5 at the timing when the maximum generation power of a solar cell 1 is detected from an output power based on the product of an output voltage and an output current detected by an inverter output voltage detector 6 and an inverter output current detector 7, selects the maximum solar cell voltage from various solar cell voltages each time the solar cell voltages being held reach the predetermined number of voltages, and sets the selected the maximum solar cell voltage as the target solar cell voltage when the low daylight amount state where the electrical power of the solar cell lowers is detected. Thus, the inverter circuit 3 is controlled to make the solar cell voltage of the solar cell 1 almost equal to the target solar cell voltage. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
