| 摘要 |
A four-layer bus bar (10) is constituted by closely stacking four sheets of bus bars (11 to 14) with insulating layers (15) interposed therebetween, said four sheets of bus bars (11 to 14) consisting of: two sheets of positive electrode side bus bars (11, 12) for connecting the positive electrode of a capacitor series circuit (CA) and the positive electrode of a power conversion unit (QA); a negative electrode side bus bar (13) for connecting the negative electrode of the capacitor series circuit (CA) and the negative electrode of the power conversion unit (QA); and an intermediate connection bus bar (14) for connecting two smoothing capacitors (CF1, CF2) in the capacitor series circuit (CA) in series. The DC-wiring inductance of a wiring structure for connecting the capacitor series circuit (CA) and the power conversion unit (QA) is then reduced in such a way that the two sheets of positive electrode side bus bars (11, 12) are connected in parallel with each other without being adjacent to each other and one sheet of positive electrode side bus bar (11) among the two sheets of positive electrode side bus bars (11, 12) is disposed adjacent to the negative electrode side bus bar (13). |
