| 摘要 |
PURPOSE:To reduce the power loss by cutting off the current supplied from a battery to an inverter, and driving the inverter by only a feedback current of the output current to operate a load when the output voltage of the inverter is higher than a reference voltage. CONSTITUTION:The voltage of a solar battery 1 rises in accordance with insolation, but the voltage applied to a switching regulator control (SRC) circuit 10 is determined by a current passing a resistance 7 and a relay contact 9 until a voltage VSB reaches a voltage V1. When the voltage VSB is higher than the voltage V1, a relay 20 is operated, and the relay contact 9 is opened in accordance with this operation, and an output voltage VOUT of a secondary coil 16 is applied to the SRC circuit 10 through a diode 23. During the period from a time t2 to a time t3 when the voltage VSB is higher than a voltage V2, the SRC circuit 10 PWM-controls the output voltage of a primary coil 11 so that individual output voltages from secondary coils 13-16 are kept constant. When the voltage VSB is lower than a voltage V3, the relay 20 is turned off, and the relay contact 9 is closed, and the voltage from the solar battery 1 is applied to the SRC circuit 10 again. |
