Large- and Small-Signal Modeling and Control Strategy for Multi-Output Welding Power Supply

Welding technology is a key aspect of the manufacturing industry. With application aluminum alloy expanding to more applications, demand for advanced welding constantly increasing. The process requires multi-output power supply improve quality. In this paper, we design novel type converter that outputs dual DC or single AC according different requirements and analyze its working principles in detail. Considering influence load current variation on circuit’s performance, established small-signal models modes large-signal system. Based these models, designed control algorithm proposed multi-electrode arc supply. Finally, constructed an experimental prototype demonstrated feasibility strategy. can be accurate, resulting better