| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power conversion device that prevents resonance phenomena and is capable of reducing common mode voltages of bus lines in a bidirectional converter. <P>SOLUTION: Capacitors 2, 3 are provided at the bus lines P, N of the bidirectional converter 30, respectively. The other ends of the capacitors 2, 3 are connected to the neutral point of a harmonic filter 10. As a result, in a resonance circuit made up of reactors 20-1 to 20-3, the harmonic filter 10, a grounding capacitor 12 and the like, the capacity of entire capacitor components becomes large so that the resonance frequency is reduced. Since the resonance circuit is not influenced by the chopping frequency by the bidirectional converter 30, which causes the resonance phenomenon to be generated, it is possible to prevent the generation of the resonance phenomenon and to reduce the common mode voltage of the bus lines in the bidirectional converter 30. <P>COPYRIGHT: (C)2008,JPO&INPIT |
