Output control method for consumable electrode arc welding power source
一种电弧焊接、输出控制的技术，应用在电弧焊设备、焊接设备、制造工具等方向，能够解决无法去除异常电压等问题，达到良好焊接品质、稳定电弧长控制、提高稳定性的效果
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Embodiment approach 1
[0063] figure 1 It is a current-voltage relationship diagram for explaining the principle of the abnormal voltage removal method in the present invention. In the figure, the horizontal axis represents the welding current i, and the vertical axis represents the welding voltage v. In the figure, at each tiny time (tens of μs to hundreds of μs) to Figure 18 The voltage / current waveforms described in are sampled and the individual operating points are indicated by circles. Description will be made below with reference to the accompanying drawings.
[0064] The locus of the operating point in the short-circuit period Ts is a curve L1. The action point moves from left to right on this curve with the passage of time. When moving to the arc period Ta, the locus of the operating point becomes the curve L2. The operating point in Ta during the arc period moves from right to left with the passage of time. After that, the short-circuit period Ts is entered again, and the above-men...
Embodiment approach 2
[0075] Figure 6 It is a diagram showing a method of calculating a reference welding voltage value for each current region according to Embodiment 2 of the present invention by moving average during welding. In the drawing, the case of subdividing the current region into four, CZ(1) to CZ(4), is employed. Welding current i(n) and welding voltage v(n) are detected in each minute time, the current zone corresponding to welding current i(n) is selected CZ(p), and the welding voltage limit value becomes vf(n). This relationship is represented by vf(p,n). vf(p, n) indicates that the n-th welding voltage limit value Vf(n) belongs to the current zone CZ(p).
[0076] As shown in the figure, it is assumed that the welding voltage limit values in three consecutive arc periods Ta(m-2) to Ta(m) in the sandwich short-circuit period are vf(4, 1) to vf(2, 27). The reference welding voltage value Vc(4) in the current zone CZ(4) at the time of vf(4, 20) is calculated, and the moving avera...
Embodiment approach 3
[0087] Figure 8 To show that in Embodiment 3 of the present invention, according to figure 1 The current-voltage relationship diagram of the method of calculating the reference welding voltage Vc from the reference action point trajectory x1-x2 described in . In the figure, the horizontal axis represents the welding current i, and the vertical axis represents the welding voltage v and the reference welding voltage value Vc. The reference action point locus x1-x2 shown in the figure and figure 1 same as described in . As shown in the figure, the reference operating point locus x1-x2 is an arc characteristic curve showing the relationship between welding current i and welding voltage v during arc generation. This reference operating point locus x1-x2 is set as a reference characteristic by the approximate curve La. This figure shows the case of the first-order approximation (straight line approximation), and the approximation curve La is Vc=a×i+b. Here a and b are consta...
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