| 摘要 |
The invention relates to a traction converter having a mains-side feed apparatus (2), a load-side self-commutated pulse converter (4) and an auxiliary operation converter (6), wherein this feed apparatus (2) has a multiplicity of primary converter groups (38), which are connected electrically in series, on the input side, which converter groups (38) are linked by means of a medium-frequency transformer device to at least one output converter (56), the DC-voltage-side connections of which are electrically conductively connected to connections on the DC-voltage side of the load-side self-commutated pulse converter (4). According to the invention, the auxiliary operation converter (6) is linked to a device for outputting an auxiliary operation power from a main field voltage of the medium-frequency transformer device. A traction converter without a mains transformer is therefore obtained, the auxiliary operation energy supply paths of which have two energy conversions fewer, as a result of which not only are weight and therefore costs saved, but the reliability is also improved. |
