CN204244093U - Inversion welding source - Google Patents
Inversion welding source Download PDFInfo
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- CN204244093U CN204244093U CN201420784265.0U CN201420784265U CN204244093U CN 204244093 U CN204244093 U CN 204244093U CN 201420784265 U CN201420784265 U CN 201420784265U CN 204244093 U CN204244093 U CN 204244093U
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Abstract
The utility model provides a kind of inversion welding source, belongs to welding technology field.This inversion welding source comprises: main circuit rectifier bridge, control circuit transformer CB1 and CB2, main circuit rectifier bridge has three inputs for connecting three phase mains, control circuit transformer CB1 with CB2 is connected with two in three inputs respectively, and, two inputs be connected with CB1 and two inputs be connected with CB2 incomplete same, also comprise: the first electric capacity C1 and the second electric capacity C2, first electric capacity C1 is in parallel with control circuit transformer CB1, second electric capacity C2 is in parallel with control circuit transformer CB2, first electric capacity C1 is equal with the capacitance of the second electric capacity C2, and be all greater than 0.2 microfarad, all be less than 2 microfarads.By inversion welding source of the present utility model, can effectively suppress inversion to be disturbed, and ensure that when open phases of three-phase power source inversion welding source can not damage.
Description
[technical field]
The utility model relates to a kind of inversion welding source, particularly relates to a kind of inversion welding source with inversion AF panel function.
[background technology]
Along with the occupation rate of inverter type welder at welding scene improves gradually, the inversion interference that the three phase mains of inverter type welder to welding onsite application produces is in continuous increase.Inversion interference is mainly derived from the inversion welding source of inverter type welder.Inversion welding source comprises inversion device, such as IGBT, MOS etc.The operating frequency of these inversion devices is very high, generally between 10KHz to 100KHz.And inversion device can produce very high reverse voltage when turning off.These high-frequency reverse voltages can form inversion interference signal, thus produce inversion interference to three phase mains.
Especially at some inverter type welder, the inversion interference signal sent by itself is not well suppressed, or the inversion interference signal absorbing circuit of some inverter type welder is when being damaged, these inverter type welders can produce very large inversion interference to three phase mains, thus have an impact to other inverter type welder used at same welding scene.These inversions interference likely affects welding effect, appearance of weld, and situation is more serious, also may have influence on the normal use of inverter type welder, even cause inverter type welder to damage.
In order to solve the problem of inversion interference, usually inversion codan to be increased in inversion welding source.Fig. 4 shows a kind of inversion welding source of prior art.As shown in Figure 4, this inversion welding source comprises the main circuit rectifier bridge 1 connected successively, the inverse switch circuit 2 being with back-pressure to absorb and main transformer MTr.Main circuit rectifier bridge 1 has three inputs U, V and W for connecting three phase mains.Between input U and input V, and difference access control circuit transformer CB1 and CB3 in parallel between input V and input W.Three input U, V and W access in parallel three electric capacity C4, C5 and C6 respectively, the capacitance of three electric capacity C4, C5 and C6 is equal, is 0.2 microfarad.
For this inversion welding source, if control circuit transformer CB1 and CB3 is high-power transformer, that is, power is all greater than 100 watts, then electric capacity C4, C5 and C6 can absorb the inversion interference signal superposed in three phase mains, thus reduces the inversion interference of three phase mains.But, if control circuit transformer CB3 is wattage transformer, namely power is less than 10 watts, then when open phases of three-phase power source, the maximum voltage value of the DC bus end of inverse switch circuit 2 will reach more than 1500V, much larger than the maximum voltage 1000V that inverse switch circuit 2 can bear, inverse switch circuit 2 therefore can be caused to be damaged when open phases of three-phase power source.
[summary of the invention]
[technical problem]
The utility model is intended to for the problems of the prior art, provides a kind of inversion welding source.
[solution]
The utility model provides a kind of inversion welding source, it comprises: main circuit rectifier bridge, the control circuit transformer CB1 that power is greater than 100 watts, and the control circuit transformer CB2 that power is less than 10 watts, described main circuit rectifier bridge has three inputs for connecting three phase mains, described control circuit transformer CB1 with CB2 is connected with two in described three inputs respectively, and, two inputs be connected with described control circuit transformer CB1 and two inputs be connected with described control circuit transformer CB2 incomplete same, it is characterized in that, also comprise: the first electric capacity C1 and the second electric capacity C2, described first electric capacity C1 is in parallel with described control circuit transformer CB1, described second electric capacity C2 is in parallel with described control circuit transformer CB2, described first electric capacity C1 is equal with the capacitance of described second electric capacity C2, and be all greater than 0.2 microfarad, all be less than 2 microfarads.
[utility model beneficial effect]
Inversion welding source of the present utility model, can effectively suppress inversion to be disturbed, and ensures that when open phases of three-phase power source inversion welding source can not damage.
[accompanying drawing explanation]
Fig. 1 is the electrical block diagram of inversion welding source of the present utility model;
Fig. 2 is the voltage oscillogram of inversion welding source of the present utility model when the first electric capacity C1 and the second electric capacity C2 is 0.22 microfarad;
Fig. 3 is the voltage oscillogram of inversion welding source of the present utility model when the first electric capacity C1 and the second electric capacity C2 is 0.44 microfarad; And
Fig. 4 is the electrical block diagram of the inversion welding source of prior art.
[embodiment]
Core concept of the present utility model is, between the input U and input V of main circuit rectifier bridge, and a difference access in parallel electric capacity between input V and input W, the capacitance of these two electric capacity is equal, is all greater than 0.2 microfarad, is all less than 2 microfarads.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.
As shown in Figure 1, inversion welding source of the present utility model comprises: main circuit rectifier bridge 1, the control circuit transformer CB1 that power is greater than 100 watts, and the control circuit transformer CB2 that power is less than 10 watts.Main circuit rectifier bridge 1 has three inputs U, V and W for connecting three phase mains, control circuit transformer CB1 with CB2 is connected with two in three inputs respectively, further, two inputs be connected with control circuit transformer CB1 and two inputs be connected with control circuit transformer CB2 incomplete same.
Inversion welding source of the present utility model also comprises: the first electric capacity C1 and the second electric capacity C2.First electric capacity C1 is in parallel with control circuit transformer CB1, and the second electric capacity C2 is in parallel with control circuit transformer CB2, and the first electric capacity C1 is equal with the capacitance of the second electric capacity C2, and is all greater than 0.2 microfarad, is all less than 2 microfarads.
In the present embodiment, input U and the input V of control circuit transformer CB1 and main circuit rectifier bridge 1 are connected, and input V and the input W of control circuit transformer CB2 and main circuit rectifier bridge 1 are connected.But the utility model is not limited thereto, also can be that control circuit transformer CB1 is connected with input V and input W, control circuit transformer CB2 be connected with input W and input U.As long as meet control circuit transformer CB1 with CB2 to be connected with two in three inputs respectively, and, two inputs be connected with control circuit transformer CB1 and two inputs be connected with control circuit transformer CB2 incomplete same.
Inversion welding source of the present utility model also comprises, the inverse switch circuit 2 that the band back-pressure be connected with main circuit rectifier bridge 1 absorbs and the main transformer MTr be connected with the inverse switch circuit 2 that band back-pressure absorbs.These structures are not improvements of the present utility model, can adopt known circuit, therefore repeat no more.
In the present embodiment, the power of control circuit transformer CB1 is 150 watts, and the power of control circuit transformer CB2 is 8 watts.The capacitance of the first electric capacity C1 and the second electric capacity C2 is 0.22 microfarad.
By inversion welding source of the present utility model, can inversion be effectively suppressed to be disturbed.Fig. 2 shows the voltage waveform of inversion welding source of the present utility model.Wherein, the wave being positioned at Fig. 2 top is the voltage waveform of main circuit rectifier bridge 1 input.After the curve being positioned at Fig. 2 bottom is through main circuit rectifier bridge 1 rectification, the voltage waveform of the DC bus end of inverse switch circuit 2.
As can be seen from Figure 2, adopt inversion welding source of the present utility model, the voltage waveform of the input of main circuit rectifier bridge 1 is sinusoidal wave substantially, and inversion interference is smaller.Further, the maximum of the voltage of DC bus end is 870V.Therefore, when open phases of three-phase power source, the voltage max of DC bus end also will at about 870V, lower than the maximum voltage 1000V that inverse switch circuit 2 can bear.Therefore, inverse switch circuit 2 can not damage when open phases of three-phase power source.
Preferably, the capacitance of the first electric capacity C1 and the second electric capacity C2 is 0.44 microfarad.Fig. 3 shows voltage waveform during C1=C2=0.44 microfarad.Wherein, the wave being positioned at Fig. 3 bottom is the voltage waveform of the input of main circuit rectifier bridge 1.After the curve being positioned at Fig. 3 top is through main circuit rectifier bridge 1 rectification, the voltage waveform of the DC bus end of inverse switch circuit 2.
As can be seen from Figure 3, the voltage waveform of the input of main circuit rectifier bridge 1 is sinusoidal wave, and inversion interference is very little.Further, the maximum of the voltage of DC bus end is 680V.Therefore, when open phases of three-phase power source, the voltage max of DC bus end also will at about 680V, far below the maximum voltage 1000V that inverse switch circuit 2 can bear.Therefore, inverse switch circuit 2 can not damage when open phases of three-phase power source.
In addition, the capacitance of the first electric capacity C1 and the second electric capacity C2 is all less than 2 microfarads.Because when the capacitance of the first electric capacity C1 and the second electric capacity C2 is all more than or equal to 2 microfarad, the voltage waveform of the input of main circuit rectifier bridge 1 is no longer sinusoidal wave, that is, cannot obtain the effect suppressing inversion interference.
Above, with reference to detailed or specific execution mode, the utility model is illustrated, but those skilled in the art understand: various change and correction can be carried out under the prerequisite not departing from spirit of the present utility model and scope.
[industrial applicibility]
Inversion welding source of the present utility model, can effectively suppress inversion to be disturbed, and ensures that when open phases of three-phase power source inversion welding source can not damage.
[reference numerals list]
1 main circuit rectifier bridge
The inverse switch circuit that 2 band back-pressures absorb
Claims (2)
1. an inversion welding source, it comprises: main circuit rectifier bridge (1), the control circuit transformer CB1 that power is greater than 100 watts, and the control circuit transformer CB2 that power is less than 10 watts, described main circuit rectifier bridge (1) has three inputs for connecting three phase mains, described control circuit transformer CB1 with CB2 is connected with two in described three inputs respectively, and, two inputs be connected with described control circuit transformer CB1 and two inputs be connected with described control circuit transformer CB2 incomplete same, it is characterized in that
Also comprise: the first electric capacity C1 and the second electric capacity C2, described first electric capacity C1 is in parallel with described control circuit transformer CB1, described second electric capacity C2 is in parallel with described control circuit transformer CB2, described first electric capacity C1 is equal with the capacitance of described second electric capacity C2, and be all greater than 0.2 microfarad, be all less than 2 microfarads.
2. inversion welding source as claimed in claim 1, is characterized in that,
The capacitance of described first electric capacity C1 and described second electric capacity C2 is 0.44 microfarad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420784265.0U CN204244093U (en) | 2014-12-11 | 2014-12-11 | Inversion welding source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420784265.0U CN204244093U (en) | 2014-12-11 | 2014-12-11 | Inversion welding source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204244093U true CN204244093U (en) | 2015-04-01 |
Family
ID=52773534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420784265.0U Active CN204244093U (en) | 2014-12-11 | 2014-12-11 | Inversion welding source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204244093U (en) |
-
2014
- 2014-12-11 CN CN201420784265.0U patent/CN204244093U/en active Active
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| GR01 | Patent grant |