Traction auxiliary converter and device

The invention provides a traction auxiliary converter and device, and the converter comprises a rectification power module, a traction inversion chopper power module, and an auxiliary inversion powermodule, and the three modules are provided with half-bridge circuits with the same number of circuits. A half-bridge circuit in the rectification power module is used for rectification; three paths ofhalf-bridge circuits in the traction inversion chopper power module are used for inverting the direct current, and one path of half-bridge circuit is used for direct current voltage overvoltage chopper adjustment; and the half-bridge circuit of the auxiliary inversion power module is used for carrying out auxiliary inversion on the direct current. According to the technical scheme, the rectification power module, the traction inversion chopper power module and the auxiliary inversion power module are all provided with half-bridge circuits with the same number of circuits, so that the power modules in the traction auxi