Parallel type high-power impulse MIG (metal inert gas) welding inversion power supply system based on DSP (digital signal processor)

The invention relates to the high-frequency IGBT (insulated gate bipolar transistor) inversion technology based on a DSP (digital signal processor), in particular to a parallel type high-power impulse MIG (metal inert gas) welding inversion power supply system based on the DSP. The parallel type high-power impulse MIG welding inversion power supply system based on the DSP comprises a three-phase alternating-current input power grid, two main circuits in parallel connection and identical in circuit structure, control circuits, a DSP digital control module, an electric arc load and a human-machine interface module, each of the main circuits comprises an input rectifying filtering module, a high-frequency inversion module, a power voltage transformation module and an output rectifying filtering module, and the control circuits comprise voltage and current detection modules, fault protection modules, the DSP digital control module, the human-machine interface module and high-frequency driving modules. Output power of an impulse MIG welding inversion power supply is effectively improved by initially using the two the main circuits in parallel connection and adopting the advanced high-frequency IGBT inversion technology and the advanced DSP digital control technology. Additionally, the parallel type high-power impulse MIG welding inversion power supply system based on the DSP has the advantages of high output power, high production efficiency, high reliability and the like and is particularly applicable to efficient high-speed welding for large and thick plates.