| 摘要 |
In the rail way vehicle power conversion device according to the present invention, an airflow passage 6 is formed by providing an L-shaped partition plate (2d) whose long side is in the rail direction, in the interior of a box suspended below the floor of the vehicle. On one side of this partition plate (2d), there are accommodated in order in the rail direction a high-speed circuit breaker (13A), relay unit (13B), interface unit (13C) and control device (13D). On the other side of partition plate (2d), a pair of smoothing reactors (8A) and (8B) are accommodated on the short side of L-shaped partition plate (2d), and a semiconductor cooling unit (7) is accommodated on the other side of these smoothing reactors (8A), (8B) and partition (2f). A heat-radiating part (7a) of this semiconductor unit (7) projects at the side of air inlet port (2e) of airflow passage (6). Electrically driven fans (9A) and (9B) are fixed within airflow passage (6) at smoothing reactors (8A) and (8B). In this way, demands for increased capacity, reduced size and reduced weight and laborsaving in regard to maintenance and inspection can be met, making it possible to cope with increased train speeds. Also, vibration and noise can be further reduced.
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