| 摘要 |
PROBLEM TO BE SOLVED: To provide a control circuit for a power conversion circuit for improving power generation efficiency.SOLUTION: A control circuit 3 for controlling an inverter circuit 2 which converts DC power output by a DC power supply comprises: a voltage target value setting unit 31 for setting voltage target value Vdcwhich is a target value of output voltage of the DC power supply; and a PWM signal generation unit 35 which generates a PWM signal on the basis of a deviation &Dgr;Vdc between a DC voltage signal Vdc detected by a DC voltage sensor 6 and the voltage target value Vdc, and outputs the generated PWM signal to the inverter circuit 2. The voltage target value setting unit 31 adjusts the voltage target value Vdcso that effective power P calculated by a power calculation circuit 7 is larger, while changing the voltage target value Vdc. Thereby, output power of the inverter circuit 2 is controlled so as to be approximately maximized. Power generation efficiency can be improved more than when control is performed so that the DC power output by the DC power supply is approximately maximized. |
