| 摘要 |
PROBLEM TO BE SOLVED: To provide a solar power control device capable of quickening the time for control processing and keeping the efficiency of generation power from a solar battery high even under an environment of sunshine drastically changing.SOLUTION: In a solar power control device, a control unit 7 is connected with a current line to which output current Ifrom a solar battery 1 is supplied, and a voltage line to which output voltage Vis applied, and a current detector 2. In the control unit, an arithmetic unit 10 calculates impedance R involved in an arithmetic result of electric power R by using current I obtained by a current measuring unit 8 measuring a detection value from the detector 2 and voltage V obtained by a voltage measuring unit 9 measuring the current line and power line; a comparator 11 compares the impedance R with reference impedance Rat a reference impedance setting unit 13, and outputs an R control signal obtained by error amplification; a comparator 12 compares power P with the maximum power at a maximum power setting unit 14, and outputs a P control signal obtained by error amplification; the control unit instructs a change-over switch 15 to switch between the R control signal and the P control signal, and thereby performs pulse width modulation control of a DC-DC converter 3.SELECTED DRAWING: Figure 1 |
