| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter circuit which makes it possible to simplify the circuit structure of the output side of an inverter to be linked to a commercial power supply system, thereby enabling an interconnecting system to be miniaturized and light in weight, and the manufacturing cost to be lowered. SOLUTION: In an interconnecting system in which the output of an inverter device 11 which outputs the frequency, voltage and phases of a commercial power supply is connected to a commercial power system 16, an insulating transformer 17 is inserted between the inverter device 11 and the commercial power supply system 16 to insulate and separate these devices. This filter circuit is structured with the inductance of this insulating transformer 17 and capacitor C connected parallel to the insulating transformer 17. |
