Modeling And Simulation Of Embedded Control System Of Inverter Arc Welding Power Supply

Arc welding inverter brought the development of a revolutionary change for welding equipment, in the application of welding equipment and welding robots. Circuitries of arc welding inverter currently exist in grossly inadequate, such as reliability of the system, electromagnetic compatibility and modular structure, etc. thereby constraining the further development of welding power source. DSP-based embedded control inverter welding technology is not only to solve the aforementioned problems and the application of effective solutions channels, but is also an effective means of digital arc welding inverter. And the modeling and simulation of system is the core technology for digital arc welding inverter, There is a great significance for Digital welding inverter on the further research and development. In view of the current arc welding inverter system problems, Embedded DSP technology will be applied to the control of arc welding inverter power source, and focusing on the modeling and simulation, This paper studies the following.The first describes the significance of arc welding inverter and the current development status, and pointed out the inadequacies in its development. It was learned in the research for this purpose. The best option to solve problems -DSP-based embedded control technology.In Arc welding inverter, introduced the "digitization" concept, and elaborated on its solution arc welding inverter "digitization" the best option. Analysis of its core components(DSP chips), classification, Principle and done a few other characteristics described in detail, and to choose the TMS320F2812 example, on the structure and process control methods DSP; It also analyzes the structure and working principle of embedded control systems; Analysis of the arc welding inverter system hardware and the hardware architecture of the system; The system's working principle of further study.The hardware structure of the building, based on the simulation software Matlab modeling of the entire power system. Analysis of arc welding inverter main circuit, the input rectifier filter circuit by circuit, IGBT switching H-bridge inverter circuit, and output frequency transformer rectifier filter circuit modules; were the main circuit modules for modeling and simulation testing and certification tests for a whole combination, According to the various parts and components for information on the selection and parameters; of arc welding inverter control circuit using DSP-based embedded control systems, modeling, Resolution of PID control system for embedded control and PWM two parts, after the certification package together, and the sampling filter composed of some control circuit; Finally, the main circuit and control circuit to form a complete circuit of the power supply system against SMAW, through repeated testing to determine the parameters of some components.Finally SMAW welding for example, the methods used to change the load characteristics of the model tests carried out. Matsushita Welding external characteristics and test results will be compared to verify the accuracy and performance of the utility system.