| 摘要 |
An electric power conversion device includes a plurality of cell converters (20a to 20c) connected in cascade and including main circuits (3a to 3c), drive circuits (4a to 4c), and self-feeding devices (5a to 5c) for supplying power to the drive circuits (4a to 4c) by being supplied with power from the main circuits (3a to 3c). The drive circuit (4a) is supplied with power via a first feed line (6a) from the self-feeding device (5a) in the corresponding cell converter (20a), and supplied with power from the self-feeding device (5c) in another cell converter (20c) via a second feed line (7c) on which an insulation input/output circuit (9c) is provided. When the self-feeding device (5a) is abnormal, the drive circuit (4a) is supplied with power from the self-feeding device (5c) in the other cell converter (20c), whereby the electric power conversion device continuously provides a desired output. |
