| In this paper, researching and producing on current waveform control system of inverter carbon dioxide welding machine is given. The overall plan, the design of hardware structure, the programming and debugging of software is described in detail. The Bang-Bang and alterable structure discrete PID synthetic control algorithm are used to modulate the width of PWM signal in real time, to acquire the fiat character by driving and controlling the opening and shutting time of IGBT, the technology of "double impulse " is adopted to realize electric current waveform control.The hardware and software have been tested in simulated conditions, it is proved that the overall plan and control idea is original and available. |
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