Controllable inductance technology used for improving arc welding power source characteristics

An arc welding power source and inductance technology, which is applied in the field of controllable inductance technology and thyristor arc welding power source, can solve the problems that the response speed of the electronic reactor is very high, and the ordinary thyristor arc welding power source cannot be fully applied.

Inactive Publication Date: 2007-08-08
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The second is the use of electronic reactors. Due to the high requirements for the response speed of electronic reactors, ordinary thyristor arc welding power sources cannot be fully applied, so they are generally only used in inverters or transistor arc welding power sources.

Method used

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  • Controllable inductance technology used for improving arc welding power source characteristics
  • Controllable inductance technology used for improving arc welding power source characteristics

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Embodiment 1

[0009] Embodiment 1, as can be seen from FIG. 1, the rectifier circuit of the present invention may be a thyristor rectifier circuit or an inverter circuit. After the AC input is stepped down by the main transformer and rectified by the rectifier circuit, it becomes a DC pulsating waveform, which is then output through a saturated inductor. The electronic reactor samples the output, and its signal is sent to the control circuit through operational amplification. In the ordinary thyristor arc welding power supply, the control circuit changes the conduction angle of the thyristor, and the inverter changes the switching time and frequency of high-power electronic components, thereby Realize the control of rectification output. When the electronic reactor monitors that the welding current is greater than the given value, it is judged that the welding circuit has been short-circuited. At this time, the electronic reactor outputs a negative signal, and the output of the rectifier cir...

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Abstract

An inductance control technique for improving the dynamic characteristics of arc welding power supply to prevent the welidng splash features that a main circuit of arc welding power supply is composed of main transformer, rectifier and saturated inductor and a control circuit consists of operating amplifier and controller. Said saturated inductor serially connected to the output of said main circuit is controlled by direct current and sampled by an electronic reactor whose output is connected to operating amplifier and in turn to controller.

Description

technical field [0001] The invention relates to a power supply for arc welding equipment, in particular to a controllable inductance technology for improving the dynamic characteristics of the arc welding power supply, and is especially suitable for the thyristor arc welding power supply. Background technique [0002] At present, in the arc welding process, in order to reduce welding spatter, the following two methods are usually used in the past: one is to connect an additional linear inductor in series in the main welding circuit, the inductance value of which is constant or adjustable, but the series additional The linear inductance can only use a compromise method to choose a moderate inductance value to barely meet the process requirements, but cannot make flexible adjustments to obtain fully satisfactory process results, resulting in large splashes. Or use saturated inductance, but due to the problem of the time constant of the main circuit, it is only applied to the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/10
Inventor 洪波尹懿袁灿屈岳波
Owner XIANGTAN UNIV
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