Electrogas welding arc length controller based on FPGA (Field Programmable Gate Array)

A gas-electric vertical welding and controller technology, applied in arc welding equipment, manufacturing tools, welding equipment, etc.

Inactive Publication Date: 2010-08-25
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, there are also some limitations, such as the selection of sampling frequency, PWM signal frequency and its precision, sampling delay, operation time and its precision, etc. These factors will have more or less influence on the control performance of the circuit

Method used

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  • Electrogas welding arc length controller based on FPGA (Field Programmable Gate Array)
  • Electrogas welding arc length controller based on FPGA (Field Programmable Gate Array)
  • Electrogas welding arc length controller based on FPGA (Field Programmable Gate Array)

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0019] As shown in Figure 1, the gas-electric vertical welding arc length controller based on FPGA is characterized in that it includes: three-way trolley walking given circuit (1-1~1-3), motor voltage negative feedback current positive feedback circuit ( 1-4), isolated optocoupler circuit (2-1), AD conversion circuit (2-2), front and back welding torch stop given circuit (2-3), welding control signal circuit (3-1), FPGA control circuit (3-2), DC motor drive circuit (3-3) and welding torch swing control circuit (3-4), wherein:

[0020] The sampling welding current signal is sent to the automatic walking given circuit (1-3);

[0021] The fast walking given circuit (1-1), the manual walking given circuit (1-2) and the automatic walking given circuit (1-3) pass through the optocoupler isolation circuit (2-1) respectively, and then send the signal to AD Conversion c...

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Abstract

The invention discloses an electrogas welding arc length controller based on FPGA (Field Programmable Gate Array), comprising three trolley walking given circuits, a motor voltage negative feedback and current positive feedback circuit, an isolation optocoupler circuit, an AD conversion circuit, a positive and negative welding gun retaining and given circuit, a welding control signal circuit, an FPGA control circuit, a direct current motor driving circuit and a welding gun swinging control circuit. The invention has the advantages of wire feeding with equal speed and climbing of the trolley with variable speed, and can better control the stability of arc during welding.

Description

technical field [0001] The invention relates to a welding device for welding metals, in particular to a control circuit for gas-electric vertical welding. Background technique [0002] Power electronic devices have experienced the development of power frequency, low frequency, intermediate frequency and high frequency. Correspondingly, the control of power electronic circuits has also developed from a control circuit originally composed of discrete components to an integrated controller. At present, power electronic devices are further developing in the direction of high frequency, high voltage resistance, high current and integration. The integrated circuit design can meet the requirements for intelligent power supply, miniaturization, modularization and easy maintenance. The rapid development of power electronic devices has also brought higher performance requirements for drive and control technologies. The traditional gas-electric vertical welding machine arc length con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/095B23K9/073
Inventor 方臣富黄隽高云或闫文洋
Owner JIANGSU UNIV OF SCI & TECH
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