| 摘要 |
An abnormality detector (6) detects whether an abnormality is occurring in a power converter (4) based on electric current that the power converter (4) outputs and an electric current detector (5) detects. When a value that includes the number of power converters (4) in which an abnormality is occurring, and that indicates amount of reduction in propelling force of a vehicle satisfies a judgment criterion, a determiner (2) determines that an increase is required in the output of the power converter (4) in which no abnormality is occurring, among multiple power converters (4), to a level higher than normal output. An output controller (3) stops the power converter (4) if notified by the abnormality detector (6) of an occurrence of an abnormality in the power converter (4). Moreover, the output controller (3) controls the output of the power converter (4), for which the determiner (2) determines that the increase is required in the output to the level higher than the normal output, so that the output becomes higher than the normal output. |
