| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the number of semiconductor devices and diodes for use and realize down-sizing and low cost in an AC-DC power conversion device.SOLUTION: A rectification circuit 1 is configured such that six semiconductor devices S1 to S6 are three-phase bridge connected with respect to a three-phase AC voltage source 4. In a voltage balance circuit 3, respective one ends of seventh and eighth semiconductor devices S7 and S8 are connected to a positive electrode side of a DC conversion unit in the rectification circuit 1 and respective one ends of ninth and tenth semiconductor devices S9 and S10 are connected to a negative electrode side of the DC conversion unit. First to fourth capacitors C1 to C4 are sequentially connected in series between the seventh and tenth semiconductor devices S7 and S10, and eleventh to fourteenth semiconductor devices S11 to S14 are sequentially connected in series between common connection points of the first and second capacitors C1 and C2 and common connection points of the third and fourth capacitors C3 and C4.</p> |
