Output control method of welding source device

A technology for welding power supply and output control, which is applied in welding equipment, manufacturing tools, arc welding equipment, etc., and can solve problems such as poor welding quality

Inactive Publication Date: 2004-05-19
DAIHEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This re-adjustment is a very complicated operation. If the re-adjustment is not timely, the arc length will deviate from the appropriate value, and the welding quality will deteriorate.

Method used

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  • Output control method of welding source device
  • Output control method of welding source device
  • Output control method of welding source device

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Experimental program
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Effect test

Embodiment approach 1

[0059] Embodiment 1 of the present invention is a method of smoothing the current differential signal Bi=Lr·di / dt in conventional electronic reactor control, calculating the current differential smoothing value Ba, and calculating the voltage control setting signal Ecr =Er-Bi+Ba, to control the output voltage. As will be described later, even if the amplification factor Lr changes, the average value of the voltage control setting signal Ecr is kept at a substantially constant value by the current differential smoothing value Ba.

[0060] figure 1 It is a block diagram of the welding power source device concerning Embodiment 1.

[0061] figure 1 This is the scheme: in Figure 6 In the above, an addition circuit AD is added between the subtraction circuit SUB and the error amplifier circuit AMP, and a current differential smoothing circuit BA is added between the addition circuit AD and the electronic reactor control circuit ERC. Moreover, in figure 1 in, will Figure 6 T...

Embodiment approach 2

[0066] Embodiment 2 of the present invention is a method of smoothing the current differential value Bi=Lr·di / dt in the above-mentioned Embodiment 1, calculating the smoothed current differential value Ba, and controlling the voltage setting signal during the short-circuit period. Ecr is calculated as the value Ecr=Er-Bi subtracting the current differential value Bi from the output voltage set value Er, and during the arc period, the voltage control setting signal Ecr is calculated as the output voltage set value Er plus the current differential smoothing value The value of Ba is Ecr=Er+Ba. As described above, in general, the amplification factor Lr is set to a large value during the short-circuit period, and the amplification factor Lr is set to a small value during the arc period. In this case, since it is equivalent to the result of subtracting the current differential value Bi only during the short-circuit period, by adding the smoothed current differential value Ba only d...

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Abstract

Provided is an output control (electronic reactor control) method for a welding power supply device by subtracting a differentiated current value Bi obtained by differentiating a output current i and multiplying the result by a predetermined amplification factor Lr from the predetermined output voltage set value Er to calculate a voltage control set value Ecr and controlling the output so that the detected value Ed of the output voltage E is nearly equal to the voltage control set value Ecr, the problem that the average value of the output voltage E is changed, the arc length is consequently deviated from an adequate value resulting in degradation in the welding quality if a set value of the amplification factor Lr is changed according to a welding condition. The current differentiation-smoothed value Ba is calculated by smoothing the differentiated current value Bi, and the voltage control set value Ecr is calculated as a value (Ecr=Er-Bi+Ba), by subtracting the differentiated current value Bi from the sum of the output voltage set value Er and the current differentiation-smoothed value Ba.

Description

technical field [0001] The present invention relates to an output control method of a welding power source device used in short-circuit arc welding, and in particular, to an improvement in so-called electronic reactor control in which a reactor is electronically formed to optimize changes in output current during a short-circuit period and during an arc period . Background technique [0002] An arc is generated between the welding wire and the base material, and the molten droplet obtained by melting the welding wire with the heat of the arc moves to the molten pool of the base material to perform welding. In such arc welding, generally, according to the movement of the droplet Types of morphology, known as bead movement (a droplet with a diameter larger than the welding wire falls from the welding wire into the molten pool of the base material), spray movement (a droplet with a diameter smaller than the welding wire falls from the welding wire into the molten pool of the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/073B23K9/00
Inventor 上园敏郎渡部健太
Owner DAIHEN CORP
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