Digital control mig welding pulse waveform generation system and generation method
A technology of pulse waveform and digital control, which is applied in the field of control, can solve the problems affecting the realization of welding power supply and occupying the interrupt time of high-speed digital signal processor, so as to simplify the workload, reduce the processing time and improve the reliability.
Inactive Publication Date: 2015-10-21
江苏伊诺普电气有限公司(中外合资)
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On the other hand, the implementation of these control strategies also takes up a lot of interrupt time of the high-speed digital signal processor, which affects the realization of other tasks of the welding power source.
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[0019] Such as figure 1 As shown, the digital control MIG welding pulse waveform generation system of the present invention includes an inverter power supply 1 for forming a welding power supply, a welding torch 2 and a welded piece 3 that are connected to the power output end of the inverter power supply and jointly constitute a welding circuit, The DSP or MCU used to control the output current of the inverter power supply; the DSP or MCU includes an analog-to-digital converter that connects the welding circuit arc voltage and current signals U2 and I2; the DSP or MCU also includes a digital-to-analog converter or pulse width modulation generator; the signal output end of the digital-to-analog converter or the pulse width modulation generator is connected to an input end of the comparator through an RC filter circuit composed of a digital potentiometer and a capacitor; the other input end of the comparator 4 The terminal is connected to the output current signal of the invert...
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The invention relates to a control technology of metal welding and machining equipment, in particular to a generating system and a generating method of numerically-controlled MIG (Metal-Inert Gas) welding pulse waveforms. The system comprises an inverter power supply, a welding gun, a welded part and a DSP (Digital Signal Processor) or an MCU (Microprogrammed Control Unit), wherein the welding gun, the welded part and the power supply of the inverter power supply jointly form a welding loop, and the DSP or the MCU is used for controlling the output current of the inverter power supply; the DSP or the MCU comprises an analog-digital converter, a digital-analog converter or a pulse-width modulating generator; the signal output end of the digital-analog converter or the pulse-width modulating generator is connected to one input end of a comparator through an RC (Remote Control) filtering circuit; the other input end of the comparator is connected with the output current signal of the inverter power supply; the output end of the comparator is used for controlling a power switching device of the inverter power supply through a current regulator. The system disclosed by the invention has the advantages of small workload and high processing speed and is convenient for adjusting parameters by aiming at different welding objects, so that the integral reliability of a welding power supply can be improved.
Description
technical field [0001] The invention relates to the control technology of metal welding processing equipment, in particular to a digitally controlled MIG welding pulse waveform generation system and method for pulse MIG (Metal Inert Gas) welding equipment. Background technique [0002] The welding power supply generally adopts the high-frequency inverter method to reduce the volume of the power supply, lighten the weight, and improve the energy conversion efficiency. At the same time, it has the characteristics of good control performance and fast dynamic response. It has been widely developed after application. It has the characteristics of stable welding arc, excellent welding quality, and the ability to weld various metals, and can greatly improve welding productivity. [0003] In order to ensure the stability of the welding process, pulse MIG welding usually adopts the form of one pulse one drop droplet transfer. In the form of one-pulse-one-drop transition, the size of...
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IPC IPC(8): B23K9/09
CPCB23K9/092B23K9/173
Inventor 宓玮
Owner 江苏伊诺普电气有限公司(中外合资)