An internal combustion EMU assisted AC system

The present invention discloses a DMU supplemental AC system, comprising an auxiliary generator, direct the way over the circuit, and an inverter circuit, said inverter circuit by the auxiliary generator set corresponding to the cooling fan and DMU traction ventilation machine powered by the auxiliary generator set direct tag through the load circuit power corresponding to DMU, ​​further comprising a power train generator, a first switch element and second switching component, a generator set powered by a first train the switch assembly respectively an air compressor DMU, ​​the driver air conditioning, power storage unit and the DC power to the load, the auxiliary generator via a second switch, respectively an air compressor assembly DMU, ​​the driver air conditioning, and power storage unit DC power supply load, an interlocking assembly between the first switch and the second switch element. The present invention has a simple structure and high reliability.