Arc welding inversion controlling method based on DSP chip

Abstract

The invention discloses a method for controlling arc welding inversion on the basis of a DSP chip, wherein a system comprises a rectification inversion filtering functional module, an IGBT grid driving module, a DSP central processing module, an input and output module, a sense amplification module and an overload signal detecting module. The method comprises: closing a total interruption and a watchdog, setting a register, initializing a digital analog conversion unit in the DSP central processing module, setting a whole comparison register and a dead area control register, allocating an I / O pin, setting a timer, allowing underflow, cyclic interrupt and underflow interrupt, setting an EVAIMRA and an IMR, allowing INT1 and INT2 interrupts, eliminating interrupt identification, opening a total interrupt, and entering a circulating waiting status. The invention applies the DSP technique in controlling an arc welding inverter system, more stable, precise and flexible performances can be provided, the control is flexible and intelligentized, the hardware design is simple, the software design is flexible and diversified, demanded peripheral circuits are few, and the method has wide application prospect.

Description

technical field [0001] The invention relates to an arc welding inverter control technology, in particular to an arc welding inverter control system and method based on a DSP chip. Background technique [0002] The arc welding inverter is composed of inverter main circuit and its control system. In recent years, inverter technology has matured day by day, but its control system is still dominated by single-chip microcomputer control. Digitization has become the development trend and trend of electronic information technology. Driven by this trend and trend, the theory and implementation methods of digital signal processing have achieved unprecedented development and become one of the fastest-growing disciplines today. As the main method and means of digital signal processing, DSP has made a breakthrough in both performance and price since its birth in the late 1970s and early 1980s, posing a severe challenge to traditional single-chip control systems. With the more complex ...

AI Technical Summary

Problems solved by technology

As the main method and means of digital signal processing, DSP has made breakthroughs in both performance and price since its birth in the late 1970s and early 1980s, posing a severe challenge to traditional single-chip control systems.

With the more complex applications and performance requirements of arc welding inverters, the disadvantages of slow computing speed, poor anti-interference ability, and poor programming flexibility of single-chip microcomputers have become more and more obvious, which has become a bottleneck restricting the development of arc welding inverters.

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