Dc -to -ac converter power unit's integrated device and circuit board

The utility model relates to an electronic switch technical field, the utility model provides a dc -to -ac converter power unit's integrated device and circuit board, integrated device include the base plate, it sets up rectifier module to arrange in proper order along the first direction on the base plate, a IGBT module and the 2nd IGBT module, rectifier module, a IGBT module and the 2nd IGBT module are consecutive, with rectifier module, a IGBT module and the 2nd IGBT module encapsulate on the base plate, through rational design arrangement and the inputoutput port that connects, can realize reducing dc bus circular current return circuit, impedance among the reduction direct current bus loop, thereby the reduction arouses temporal excessive pressure and overflows the adverse effect who causes IGBT because of impedance in the dc bus, and simultaneously, rectifier circuit and H bridge inverter circuit realize the wholeization encapsulation, can better realize adopting printed circuit board to replace the fem