Large power supply converter

The utility model discloses a large power supply converter, which relates to a big power converter based on the IGBT member. The converter comprises a laminated busbar (1), an IGBT (2), an output bus bar (3), a driving circuit (4), a photoelectric switching circuit (5), an RCD circuit (6), a water cooling board (7) and an energy storage capacitor. The laminated busbar (1) is connected to an external rectification power supply and is in charge of receiving the energy and transmitting the energy to the IGBT (2); the energy storage capacitor (8) is installed on the laminated busbar (1); the output busbar (3) is connected to the output end of the IGBT (2); the driving circuit (4) and the photoelectric switching circuit (5) constitute the control part of the converter for controlling the on-and-off of the IGBT (2); the IGBT (2) is installed on the water cooling board (7); and the driving circuit (4) is welded on the IGBT (2). The large power power supply converter can save the production time and the production cost of the power supply and can improve the reliability of the product.