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Control method of IGBT inversion submerged arc welding machine

A technology of a submerged arc welding machine and a control method, applied in arc welding equipment, manufacturing tools, welding equipment and other directions, can solve the problems of difficulty in power supply debugging and further development work, complicated circuits, weak anti-interference ability, etc.

Inactive Publication Date: 2009-05-20
上海气焊机厂有限公司
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AI Technical Summary

Problems solved by technology

[0002] Generally, the control system of arc welding power supply adopts the analog control technology based on integrated circuit, which has the disadvantages of complex circuit and weak anti-interference ability, which also brings difficulties to the debugging and further development of the whole power supply.

Method used

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  • Control method of IGBT inversion submerged arc welding machine

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Embodiment Construction

[0015] The control method of the IGBT inverter submerged arc welding machine of the present invention will be further described in detail below.

[0016] see figure 1 As shown, the IGBT inverter submerged arc welding machine control system used in the present invention includes a minimum single-chip system, a parameter preset module, a switch value input module, a pulse width modulation module, a data acquisition module, a protection module and a display module, and the minimum single-chip The system is electrically connected to the above modules respectively, the minimum system of the single chip microcomputer is also used to electrically connect the trolley motor, the pulse width modulation module is used to electrically connect the IGBT power supply and the wire feeding motor respectively, and the protection module is electrically connected to the IGBT power supply.

[0017] Preferably, the minimum system of the single-chip microcomputer includes a single-chip microcomputer...

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Abstract

The invention relates to a method for controlling an IGBT inverter type submerged arc welding machine. The method comprises the following steps: adopting a singlechip to sample welding current and voltage, and comparing the welding current and the voltage with preset current and voltage to obtain current deviation and voltage deviation; carrying out PI calculation according to the current deviation, outputting a control parameter, sending a voltage signal to a pulse width modulator after the control parameter is converted into the voltage signal to obtain two groups of mutually inverted pulse width signals, and controlling the on and off of a main circuit IGBT by the signals through power amplifying and driving; carrying out PI calculation according to the voltage deviation, outputting a control parameter, sending analog voltage which is converted by the control parameter to another pulse width modulator, modulating a pulse signal, and controlling the on and off of an MOSFET by the signal through driving and amplifying; and generating a PWM signal by the singlechip according to a given welding speed, driving the on and the off of the MOSFET by the signal after photoelectric isolation and signal amplification, and adjusting running speed of an electric motor of a trolley. The method has the advantages of stability, reliability and convenient use, and can achieve automatic submerged arc welding better.

Description

technical field [0001] The present invention relates to the technical field of control methods, in particular to the technical field of welding machine control methods, in particular to an IGBT inverter submerged arc welding machine control method. Background technique [0002] Generally, the control system of arc welding power supply adopts analog control technology based on integrated circuit, which has the disadvantages of complex circuit and weak anti-interference ability, which also brings difficulties to the debugging and further development of the whole power supply. With the development of large-scale integrated circuits and computer technology, the application of microcomputers in welding equipment control has become more and more extensive and in-depth. The control of welding machines has developed from early analog control to today's microcomputer control. Contents of the invention [0003] The object of the present invention is to provide a control method for a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/10B23K9/18
Inventor 于乾波
Owner 上海气焊机厂有限公司
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