Full-digital high-power plasma arc precise cutting system

Abstract

The invention provides a full-digital high-power plasma arc precise cutting system which comprises a power circuit, a control circuit, a high-frequency arc starter module, a coupling reactance module, a plasma arc cutting gun, a cooling system, an air compressing system and a cutting traveling mechanism. The high-frequency arc starter module, the coupling reactance module and the plasma arc cutting gun are sequentially connected. The control circuit is connected with a three-phase alternating current input power supply, the power circuit and the high-frequency arc starter module. The input ends of the cooling system, the air compressing system and the cutting traveling mechanism are connected with the control circuit, and the output ends are connected with the plasma arc cutting gun. One end of the power circuit is connected with the three-phase alternating current input power supply, and the other end is connected with the coupling reactance module. By means of the system, power enhancing and electric energy efficient conversion and reliable transferring are achieved, a full-digital control technology and a visual man-machine interaction technology based on a structure of advanced reduced instruction set computer machines (ARM)+RA8875+touch screen are introduced in the system, control precision and operability of the system are improved.

Description

technical field [0001] The invention relates to the technical field of high-frequency inverter, and more specifically, relates to an all-digital high-power plasma arc fine cutting system. Background technique [0002] At present, in the field of plasma arc cutting, the inverter plasma cutting system has become the mainstream direction. However, the power of the current plasma cutting system is small, and the cutting current is generally within 100A. Its control system is mainly realized by an analog circuit plus a small amount of integrated circuits, resulting in many discrete components, complicated circuits, and affected by factors such as noise, temperature, and device aging. , which has a greater impact on the plasma cutting system. Coupled with the drift of the inherent component parameters of the existing plasma cutting system, the consistency of the products using the existing cutting system is poor, and the control of the cutting process is not fine enough. [0003...

AI Technical Summary

Problems solved by technology

However, the power of the current plasma cutting system is small, and the cutting current is generally within 100A. Its control system is mainly realized by an analog circuit plus a small amount of integrated circuits, resulting in many discrete components, complicated circuits, and affected by factors such as noise, temperature, and device aging. , which has a greater impact on the plasma cutting system

Coupled with the inherent component parameter drift of the existing plasma cutting system, the consistency of the products using the existing cutting system is poor, and the control of the cutting process is not fine enough

[0003] In addition, the human-computer interaction function of the current inverter plasma arc cutting system is weak, and its operation interface is mainly composed of digital tubes and switch buttons. The process parameters and status information that can be displayed are also very limited, and the parameter setting accuracy is not high enough.

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