| 摘要 |
PROBLEM TO BE SOLVED: To prevent adverse effects on peripheral equipment by reducing a zero-phase current on the AC power side, and to reduce noise terminal voltage. SOLUTION: In a voltage inverter, DC-AC power conversion is conducted by an inverted section 4, while using DC voltage obtained by rectifying AC voltage by a rectifying circuit 2 as an input, and an n-phase (n>=2 and n=2 is set as single phase) AC voltage is output to a load 5. The n-phase AC output terminals of the inverter section 4 are connected to the load 5 via (n) windings of a zero-phase transformer 6 with mutually densely coupled (n+1) windings, while the AC output terminals are joined at one ends of each capacitor of a capacitor circuit 7, in which (n) capacitors are start-connected, and the neutral point of the capacitor circuit 7 is connected one potential point n of a DC intermediate circuit via the residual one winding 62 of the zero-phase transformer 6. |
