| 摘要 |
PROBLEM TO BE SOLVED: To avoid a wasteful operation of an inverter power generating device when the inverter power generating device is operated in parallel with another AC power supply to enhance the efficiency of the power generating device. SOLUTION: Output terminals of an inverter power generating device 1 and output terminals of another inverter power generating device 1' (external AC power supply) are connected to common load connection terminals 7u and 7v. While a load 9 is driven by the output of the inverter power generating device 1', when a DC power supply voltage Vd between both the terminals of a smoothing capacitor Cd in a DC power supply unit DC of the inverter power generating device 1 becomes a value lower than a start deciding value, the inverter power generating device 1 is started to operate in parallel with the other inverter power generating device 1'. When the voltage between both the terminals of the smoothing capacitor Cd becomes a value higher than the start deciding value, the operation of the inverter power generating device 1 is stopped. |
