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Based on DSP (Digital Signal Process), a inverter welding power source has been introduced. By designing of the software of system and circuitry of wire feeder, constant-voltage external characteristic for self-shielded flux-core wire and stable wire feed speed are acquired. To optimize the parameter, lots of tests had been done. To apply to pipe welding, the weld process is stable and credible. The facility is easy to use and multifunctional

The Research of Inverter Welding Power Source Based on DSP for Self-shielded Flux-cored Wire