Multifunctional high-frequency inversion direct-current electric welding machine realizing circuit

A high-frequency inverter, DC welding technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., to achieve the effect of perfect protection, high-quality welding, and lower production costs

Inactive Publication Date: 2014-05-28
YANCHENG DLD WELDING SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technicians of scientific research institutes and enterprises are constantly exploring and researching, hoping to develop an electric welding machine with superior performance to meet the functional requirements of TIG welding, MMA welding and MIG welding at the same time. Although some progress has been made, in practice There are still technical problems that have not been overcome in the application

Method used

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  • Multifunctional high-frequency inversion direct-current electric welding machine realizing circuit

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Experimental program
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Effect test

Embodiment 1

[0015]The welding machine control unit 2 sends a signal CL to control the selection switch MUX to determine the working mode of the multifunctional high-frequency inverter welding machine, that is, constant current / constant voltage control selection. When the signal CL is at a low level, the selector switch MUX is turned down (the connection state in the figure), the input of the current regulator 9 is provided by the voltage regulator 7, and the whole system forms a double-loop control structure with an inner current loop and an outer voltage loop. The machine output is a constant voltage characteristic. In the constant voltage mode, the control structure of the electric welding machine system is a double closed loop of voltage and current, which has a constant voltage characteristic and is suitable for MIG welding mode. If the output voltage is the no-load voltage value, it indicates that the welder is ready to strike the arc; if the output voltage begins to drop, it indicat...

Embodiment 2

[0017] The welding machine control unit 2 sends a signal CL to control the selection switch MUX to determine the working mode of the multifunctional high-frequency inverter welding machine, that is, constant current / constant voltage control selection. When the signal CL is at high level, the selection switch MUX is turned upward, the input of the current regulator 9 is provided by the control unit 2 of the electric welding machine, the whole system forms a single current loop structure, and the output of the electric welding machine is a constant current characteristic. In the constant current mode, the control structure of the electric welding machine system is a current single closed loop with constant current characteristics, which is suitable for TIG and MMA welding modes. If there is no output current, it indicates that the welding machine is in the state of preparing for arc striking; if there is output current and output voltage, it indicates that the welding machine is ...

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Abstract

The invention relates to an electric welding machine circuit, in particular to a multifunctional high-frequency inversion direct-current electric welding machine realizing circuit which comprises an electric welding machine control unit, a voltage regulator, a current regulator, a PWM (pulse-width modulation) control circuit, an IGBT (insulated gate bipolar transistor) driving circuit, a high-frequency inversion direct-current power source main circuit, an electric welding machine output electrode, a current detection circuit and an isolation voltage detection circuit. The electric welding machine control unit is a control center taking a CPU (central processing unit) logic control unit as a core, and the CPU logic control unit is connected with a display unit, a constant-current or constant-voltage control unit, a D / A converter and an A / D converter respectively. High-frequency technology, soft switching technology and digital control technology are adopted to realize constant-voltage characteristic and constant-current characteristic of an electric welding machine. The electric welding machine has three functions including TIG (argon tungsten-arc welding), MMA (manual metal arc) and MIG (metal-inert gas) welding, production cost is lowered, requirements on multifunctional intelligentization and high-quality welding are met, and the electric welding machine has a friendly display interface and is convenient to operate and use.

Description

technical field [0001] The invention relates to a welding machine circuit, in particular to a multifunctional high-frequency inverter DC welding machine realization circuit, which can realize three functions of TIG tungsten argon arc welding, MMA manual welding and MIG metal pole gas shielded welding. Background technique [0002] Since the reform and opening up, the national economy has grown rapidly, "scientific and technological innovation, independent innovation" has become the mainstream of domestic industrial development, and my country's industry is gradually developing in the direction of intensive, energy-saving, emission-reducing, and low-carbon. Electric welding machine is a low-voltage electrical equipment commonly used in construction, manufacturing, and machining industries. It is widely used as an indispensable welding equipment in industrial production. With the development of industry and the process of internationalization of the market, electric welding ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/095
CPCB23K9/1062B23K9/0953
Inventor 陈明祥刘连华曹以龙
Owner YANCHENG DLD WELDING SCI & TECH
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