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Power supply unit for welding

A power supply device and electric power technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of hindering the arc and hindering the improvement of welding performance, so as to reduce the number of actions, improve the welding performance, and shorten the time spent. Effect

Active Publication Date: 2015-09-23
DAIHEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, in the form of reflecting the output voltage detected in the power supply device on the control value of the inverter circuit, there is a concern that a voltage value deviated from the true electrode tip voltage may be reflected on the control value of the inverter circuit. This will prevent proper arc generation and prevent further welding performance enhancement

Method used

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  • Power supply unit for welding
  • Power supply unit for welding
  • Power supply unit for welding

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Embodiment Construction

[0044] One embodiment of the present invention will be described below with reference to the drawings.

[0045] figure 1A consumable electrode type arc welding machine 10 is shown. In the arc welding machine 10, the welding wire electrode 12 supported by the welding torch TH is connected to the positive side output terminal of the welding power supply device 11, and the welding object M is connected to the negative side output terminal of the power supply device 11. The DC output power generated at 11 is applied to wire electrode 12 to perform arc welding. At this time, since the wire electrode 12 is consumed during welding, the wire supply device 13 feeds the wire according to the consumption. Output power is supplied to the wire electrode 12 and the welding object M via the power cable 14 connected to the output terminal of the power supply device 11 .

[0046] The welding power supply device 11 converts three-phase AC input power supplied from a commercial power supply i...

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Abstract

The present application relates to a welding power supply (11), wherein total resistance at an output side of the power supply (11) is measured in a measurement mode based on the output voltage when an output current I generated by an inverter circuit (22) is set as a current. Inductances, when the output current I are set to two currents corresponding to a normal region and oversaturated region of a DC reactor (25), are detected. A total inductance is calculated as a function by linearly interpolating the two inductances. During welding, a controller (31) corrects changes in the voltage related to the total resistance and the total inductance for the detected output voltage to calculate the tip voltage.

Description

technical field [0001] The present invention relates to a welding power supply device that performs feedback control based on detection of electrode tip voltage. Background technique [0002] There is a technique disclosed in Patent Document 1, for example, in a welding power supply device used in an arc welding machine or the like. The welding power supply unit uses an inverter circuit to convert the DC power rectified from the AC input power from a commercial power supply into high-frequency AC power, and uses a rectifier circuit and a DC reactor to convert the high-frequency AC power that is adjusted by the welding transformer overvoltage into DC output power suitable for arc welding. The output power generated by the power supply device is supplied to the electrode supported by the welding torch, whereby an arc is generated between the electrode tip and the welding target, and the welding target is welded. [0003] In addition, such a welding power supply device detect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/073B23K9/095
CPCB23K9/1062B23K9/173B23K9/0953B23K9/0956
Inventor 波多晓加藤敏彦惠良哲生
Owner DAIHEN CORP