| 摘要 |
A railway vehicle drive system receiving power from an overhead line has control technology to suppress a beat phenomenon which occurs in a main converter of an alternating current electric vehicle. The system comprises: a first power converter 5 converting single-phase AC power from the overhead wire into DC power; a second power converter 9 converting the DC power into three-phase AC power supplied to a motor 11. A resonance filter 6 is parallel-connected to the first power conversion device and has a resonance point which is double the frequency of the first power supply. A pulsation suppression device 205 suppresses pulsation superposed on the three-phase AC power by controlling output from the second power conversion device depending on a voltage detected by a voltage detector 7. The drive system further includes first 22 and second 23 AC power supplies, with associated overhead lines 24, 25, having different frequencies. The pulsation suppression device may be activated or deactivated dependant on from which supply the vehicle is receiving power. |
