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Welding power source with automatic arc voltage compensation

A technology of arc voltage and welding power supply, which is applied in the field of welding power supply with automatic arc voltage compensation, which can solve the problems of voltage drop variation and failure to meet actual use requirements, and achieve the effect of ensuring welding quality

Inactive Publication Date: 2020-07-10
OTC ELECTROMECHANICAL QINGDAO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Find the appropriate process parameter Vo through trial welding, and set Vo for welding to realize simple voltage compensation. However, the internal resistance of the cable will change with the influence of ambient temperature, service time, and current, and the voltage drop will also change. As it changes, the method of manually setting the compensation voltage cannot meet the actual use needs

Method used

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  • Welding power source with automatic arc voltage compensation
  • Welding power source with automatic arc voltage compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] combine figure 1 The welding power supply with automatic arc voltage compensation includes a welding power supply terminal 1 and a wire feeder terminal 4. The welding power supply terminal 1 is equipped with a voltage processing control unit 2. The voltage processing control unit 2 includes an arc voltage receiving unit, a voltage optimization processing unit and a voltage The compensation unit, the end 4 of the wire feeding device is equipped with an arc voltage detection unit and an arc voltage sending unit 5 , and CAN communication or wireless transmission 3 is adopted between the arc voltage sending unit and the welding power supply end 1 .

[0022] The arc voltage detection unit uses analog circuit components to collect arc voltage Va, and performs analog circuit filtering, AD conversion and other processing, and converts it into a digital signal.

[0023] The arc voltage sending unit uses the MCU and digital circuit components to process the collected arc voltage ...

Embodiment 2

[0030] Based on the welding power source described in Embodiment 1, it can also be used for monitoring and maintenance of cables to realize cable temperature detection, high temperature alarm, and cable abnormality detection.

[0031] Cable temperature detection and high temperature alarm: use the voltage optimization processing unit to calculate the cable voltage drop from the feedback arc voltage and the output terminal voltage of the welding power supply, and calculate the cable temperature through the software through the temperature relationship between the voltage drop and internal resistance. A warning is displayed when the temperature exceeds the allowable set value.

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Abstract

The invention discloses a welding power source with automatic arc voltage compensation, and relates to the technical field of welding control. The welding power source comprises a welding power sourceend and a wire feeding device end, wherein a voltage processing control unit is arranged at the welding power source end and comprises an arc voltage receiving unit, a voltage optimization processingunit and a voltage compensation unit; and an arc voltage detection unit and an arc voltage sending unit are arranged at the wire feeding device end, and CAN communication or wireless transmission isadopted between the arc voltage sending unit and the welding power source end. In the welding process, actually measured arc voltage delta V is transmitted to the welding power source end, the welding power source end calculates an arc voltage deviation value delta V caused by change of V<r> according to the returned arc voltage V, the delta V = V<as> - V, the welding power source end adjusts the output of the welding power source end to enable V<0> = V<os> + V, and therefore the V is kept unchanged; and the welding power source can constantly track the change of the arc voltage and send the arc voltage to the welding power source end.

Description

technical field [0001] The invention relates to the technical field of welding control, in particular to a welding power supply with automatic arc voltage compensation. Background technique [0002] In order to ensure the welding quality, it is very important to keep the welding arc voltage Va stable. The welding arc voltage Va is different from the output voltage Vo of the welding power supply, and the difference between the two is the voltage drop Vr on the main cable. The current practice is to find the appropriate process parameter Vo through trial welding, and set Vo for welding. [0003] Find the appropriate process parameter Vo through trial welding, and set Vo for welding to realize simple voltage compensation. However, the internal resistance of the cable will change with the influence of ambient temperature, service time, and current, and the voltage drop will also change. As it changes, the way of manually setting the compensation voltage cannot meet the needs o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/073B23K9/095B23K9/32B23K9/133
CPCB23K9/0731B23K9/095B23K9/133B23K9/32
Inventor 温宇锋范运洲潘存高
Owner OTC ELECTROMECHANICAL QINGDAO CO LTD