Train converter fault diagnosis device

The invention relates to a train converter fault diagnosis device comprising a sensor unit used for collecting operation state signals of a plurality of different components in a converter and outputting corresponding operation state parameters; the data acquisition unit is used for acquiring the running state parameters, output by the sensor unit, of each component; and the data analysis unit is used for outputting fault early warning information when the fault of the converter is determined based on the operation state parameter of each component. The converter fault diagnosis device can diagnose the converter fault efficiently and more accurately, so that the fault can be processed quickly and efficiently, the operation and maintenance cost is reduced, and the safety and reliability of the converter are improved.