Device for traction voltage transformation

The utility model discloses a device for traction voltage transformation, the device including a plurality of cascaded sub-transformers and with a plurality of the bypass switch that sub-transformer corresponds, said sub-transformer contains the high pressure stage, isolation level and output stage, wherein: the bypass switch with correspond during the input of the high pressure stage of said sub-transformer was connected and is connected to the power supply network, it was used for controlling according to actual conditions the high pressure stage inserts / breaks away from said power supply network, the input of isolation level is connected to the output of high pressure stage, the input of output stage is connected to the output of isolation level, each the output of the output stage of sub-transformer is parallelly connected with output voltage. Compared with the prior art, the utility model discloses a device for traction voltage transformation simple structure, the operation is stable, and its volume and weight reduce greatly, have not only reduced the train design degree of difficulty, the train of going a long way greatly in addition speed-raising