CN209157380U - High-power IGBT commutation type welding resistance power supply device - Google Patents
High-power IGBT commutation type welding resistance power supply device Download PDFInfo
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- CN209157380U CN209157380U CN201821936934.6U CN201821936934U CN209157380U CN 209157380 U CN209157380 U CN 209157380U CN 201821936934 U CN201821936934 U CN 201821936934U CN 209157380 U CN209157380 U CN 209157380U
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- 238000003466 welding Methods 0.000 title claims abstract description 48
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 abstract description 6
- 230000001934 delay Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009527 percussion Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model provides a kind of high-power IGBT commutation type welding resistance power supply device, including power control system and electric power main circuit；The power control system includes impulse generator and point seam weld cyclelog, and impulse generator is connected with seam weld cyclelog is put, and impulse generator and point seam weld cyclelog are connected with electric power main circuit respectively；The electric power main circuit is made of semi-controlled three-phase bridge rectifier circuit and welding current output circuit, and semi-controlled three-phase bridge rectifier circuit includes heavy-duty diode D1、D2、D3And controllable silicon SCR1、SCR2、SCR3；Welding current output circuit includes four high-power IGBT VT1、VT2、VT3、VT4With welding transformer T.High-power IGBT commutation type welding resistance power supply device provided by the utility model eliminates expensive large value capacitor group, has saved cost, and current waveform has the characteristics that slow rise delays drop, good manufacturability.
Description
Technical field
The utility model is specifically related to a kind of high-power IGBT commutation type welding resistance power supply device.
Background technique
Currently, using 20,000 joules or more of high power capacity percussion welder, mainly both at home and abroad to weld refrigerator, air-conditioning pressure
The bigger metal component of the sealing combination hub and thickness of contracting machine.In the use process of many years, find this kind of powerful
There are following clearly disadvantageous places for condenser discharge welder:
1, the climbing speed of welding current is too fast, and the rising front of waveform is too steep, and the width of wave tops is too narrow, to lead
Cause nugget size smaller, Joint Strength is poor.And in the welding process, a large amount of splashing is easily generated, weld seam is destroyed
Leakproofness.
2, the capacitor group of large capacity must also bear certain backward voltage in quick charge and discharge process, therefore not
Only capacity can decline, and service life is shorter.Due to large value capacitor group expense usually from welding machine total price 1/3 with
On, so replacement capacitor group often causes biggish financial burden to producer.
Utility model content
Purpose of the utility model is to solve the deficiencies in the prior art, provide a kind of high-power IGBT commutation type welding resistance
Power supply device, to solve the above problem existing for high power capacity percussion welder.
The purpose of this utility model is achieved through the following technical solutions:
A kind of high-power IGBT commutation type welding resistance power supply device, including power control system and electric power main circuit；The electricity
Source control system includes impulse generator and point seam weld cyclelog, and impulse generator is connected with seam weld cyclelog is put
It connects, impulse generator and point seam weld cyclelog are connected with electric power main circuit respectively；
The electric power main circuit is made of semi-controlled three-phase bridge rectifier circuit and welding current output circuit, three-phase bridge half
Control rectifying circuit includes heavy-duty diode D1、D2、D3And controllable silicon SCR1、SCR2、SCR3；Welding current output circuit includes four
A high-power IGBT VT1、VT2、VT3、VT4With welding transformer T；
Impulse generator is for exporting triggering controllable silicon SCR1、SCR2、SCR3Start pulse signal, put the control of seam weld program
The effect of device processed is that output controls VT respectively1、VT3Or VT2、VT4Grid control signal.
Further, the SCR1And D1It is connected in series, forms branch one；SCR2And D2It is connected in series, forms branch two；
SCR3And D3It is connected in series, forms branch three；The branch one, branch two, branch three are connected in parallel.
Further, the electric power main circuit further includes diode D4, the diode D4With branch one, branch two, branch three
It is connected in parallel.
Further, the VT1And VT4It is connected in series, forms branch four, VT1Source electrode E1And VT4Drain electrode C4It is connected,
VT1Drain electrode C1And VT4Source electrode E4It is connected respectively with semi-controlled three-phase bridge rectifier circuit.
Further, the VT2And VT3It is connected in series, forms branch five, VT2Source electrode E2And VT3Drain electrode C3It is connected,
VT2Drain electrode C2And VT3Source electrode E3It is connected respectively with semi-controlled three-phase bridge rectifier circuit.
Further, the branch four, branch five and branch one, branch two, branch three are connected in parallel；Welding transformer T points
VT is not accessed by conducting wire1、VT4Between and VT2、VT3Between.
Further, control VT is being issued in described seam weld cyclelog1、VT3Or VT2、VT4Grid control signal
While, the enabling signal of trigger generator is issued, its output-scr is made1、SCR2、SCR3Start pulse signal.
In conclusion by adopting the above-described technical solution, the utility model compared with prior art, has the advantage that
High-power IGBT commutation type welding resistance power supply device provided by the utility model eliminates expensive large capacity electricity
Container group has saved cost, and current waveform has the characteristics that slow rise delays drop, good manufacturability.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model power control system；
Fig. 2 is the circuit diagram of the utility model electric power main circuit；
Fig. 3 is three-phase alternating voltage and welding current waveform schematic diagram.
Specific embodiment
Specific embodiment of the present utility model is further described in detail with reference to the accompanying drawing.
Referring to Figure 1~3, the utility model provides a kind of high-power IGBT commutation type welding resistance power supply device, including electricity
Source control system and electric power main circuit.
Power control system include impulse generator and point seam weld cyclelog, impulse generator and point the control of seam weld program
Device processed is connected, and impulse generator and point seam weld cyclelog are connected with electric power main circuit respectively.
The effect of impulse generator is output triggering controllable silicon SCR1、SCR2、SCR3Start pulse signal, put seam weld journey
The effect of sequence controller is that output controls VT respectively1、VT3(or VT2、VT4) grid control signal.In a seam weld process control
Device is issuing control VT1、VT3(or VT2、VT4) grid control signal while, issue trigger generator starting letter
Number, make its output-scr1、SCR2、SCR3Start pulse signal.
Electric power main circuit is made of semi-controlled three-phase bridge rectifier circuit and welding current output circuit, and three-phase semi-controlled bridge type is whole
Current circuit includes heavy-duty diode D1、D2、D3And controllable silicon SCR1、SCR2、SCR3；Welding current output circuit includes four big
Power IGBT (VT1、VT2、VT3、VT4) and welding transformer T.
SCR1And D1It is connected in series, forms branch one；SCR2And D2It is connected in series, forms branch two；SCR3And D3Series connection connects
It connects, forms branch three；Branch one, branch two, branch three are connected in parallel.VT1And VT4It is connected in series, forms branch four, VT1Source
Pole E1And VT4Drain electrode C4It is connected, VT1Drain electrode C1And VT4Source electrode E4It is connected respectively with semi-controlled three-phase bridge rectifier circuit
It connects.VT2And VT3It is connected in series, forms branch five, VT2Source electrode E2And VT3Drain electrode C3It is connected, VT2Drain electrode C2And VT3
Source electrode E3It is connected respectively with semi-controlled three-phase bridge rectifier circuit.Branch four, branch five and branch one, branch two, branch three
It is connected in parallel.Welding transformer T passes through conducting wire respectively and accesses VT1、VT4Between and VT2、VT3Between.
Electric power main circuit further includes diode D4, diode D4It is connected in parallel with branch one, branch two, branch three.
Three-phase alternating voltage is rectified via semi-controlled three-phase bridge rectifier circuit, and output ripple DC voltage is added in reversing switch
4,5 both ends of circuit.Work as VT2、VT4Cut-off, VT1、VT3Control electrode G1、G3In addition when the square-wave voltage of+15V, VT1、 VT3
Conducting；The DC pulse voltage of rectifier bridge output at this time, via VT1To welding transformer T primary side, then arrive VT3, finally to 5 ends；
Electric current flows to 7 ends from 6 ends of welding transformer, while generating just lower negative weldingvoltage on its secondary side.Work as VT1、VT3It cuts
Only, VT2、VT4Control electrode G2、G4In addition when the square-wave voltage of+15V, VT2、VT4Conducting, the direct current of rectifier bridge output at this time
Pulsating volage, via VT2To the primary side of welding transformer T, then arrive VT4, finally to 5 ends；Electric current from welding transformer primary side 7
End flows to 6 ends, while the weldingvoltage positive in the case where its secondary side generates and bears.
Diode D4Effect be: for welding transformer T primary side generate back-emf bleed-off circuit is provided.
The related corresponding waveform of high-power IGBT commutation type welding resistance power supply is as shown in Figure 3.From figure as it can be seen that working as controlling angled a=60 °
When, the waveform of welding current i is that continuous slow rise delays drop waveform；When controlling angled a=120 °, welding current waveform is discontinuous
The slow drop waveform of slow liter.Therefore, SCR is adjusted1、SCR2、SCR3Pilot angle and VT1、VT3Or VT2、VT4Turn-on time can
Obtain different peak values and conduction time, the good welding current waveform of craftsmanship.In addition, the conduction time of the system is power frequency
1/3 week, i.e. step-length is about 7ms, and time control is more accurate.Further, since eliminating the capacitor group of large capacity, make equipment
Cost dropped 1/3 or more.
Therefore, three-phase alternating voltage leads to VT after three-phase half-controlled bridge-type rectifier circuit rectifies1、VT3And VT2、VT4Two pairs
Powerful IGBT directly powers to welding transformer；Work as VT1、VT3When conducting, welding transformer primary current is flowed from upper end
To lower end；Work as VT2、VT4When conducting, welding transformer primary current is reversed.High-power IGBT commutation type provided by the utility model
Welding resistance power supply device eliminates expensive large value capacitor group, and current waveform has the characteristics that slow rise delays drop, work
Skill is good.
Embodiment described above is merely to illustrate the technical idea and feature of the utility model, and its object is to make ability
Technical staff in domain can understand the content of the utility model and implement accordingly, cannot be only practical to limit with the present embodiment
Novel the scope of the patents, i.e., it is all according to same changes or modifications made by the revealed spirit of the utility model, it still falls in practical
In novel the scope of the patents.
Claims (7)
1. a kind of high-power IGBT commutation type welding resistance power supply device, which is characterized in that including power control system and the main electricity of power supply
Road；The power control system include impulse generator and point seam weld cyclelog, impulse generator and point the control of seam weld program
Device processed is connected, and impulse generator and point seam weld cyclelog are connected with electric power main circuit respectively；
The electric power main circuit is made of semi-controlled three-phase bridge rectifier circuit and welding current output circuit, and three-phase semi-controlled bridge type is whole
Current circuit includes heavy-duty diode D1、D2、D3And controllable silicon SCR1、SCR2、SCR3；Welding current output circuit includes four big
Power IGBT VT1、VT2、VT3、VT4With welding transformer T；
Impulse generator is for exporting triggering controllable silicon SCR1、SCR2、SCR3Start pulse signal, put seam weld cyclelog
Effect be respectively output control VT1、VT3Or VT2、VT4Grid control signal.
2. high-power IGBT commutation type welding resistance power supply device according to claim 1, which is characterized in that the SCR1And D1
It is connected in series, forms branch one；SCR2And D2It is connected in series, forms branch two；SCR3And D3It is connected in series, forms branch three；Institute
Branch one, branch two, branch three is stated to be connected in parallel.
3. high-power IGBT commutation type welding resistance power supply device according to claim 2, which is characterized in that the main electricity of power supply
Road further includes diode D4, the diode D4It is connected in parallel with branch one, branch two, branch three.
4. high-power IGBT commutation type welding resistance power supply device according to claim 2, which is characterized in that the VT1And VT4
It is connected in series, forms branch four, VT1Source electrode E1And VT4Drain electrode C4It is connected, VT1Drain electrode C1And VT4Source electrode E4Respectively
It is connected with semi-controlled three-phase bridge rectifier circuit.
5. high-power IGBT commutation type welding resistance power supply device according to claim 4, which is characterized in that the VT2And VT3
It is connected in series, forms branch five, VT2Source electrode E2And VT3Drain electrode C3It is connected, VT2Drain electrode C2And VT3Source electrode E3Respectively
It is connected with semi-controlled three-phase bridge rectifier circuit.
6. high-power IGBT commutation type welding resistance power supply device according to claim 5, which is characterized in that the branch four,
Branch five and branch one, branch two, branch three are connected in parallel；Welding transformer T passes through conducting wire respectively and accesses VT1、VT4Between and
VT2、VT3Between.
7. high-power IGBT commutation type welding resistance power supply device according to claim 1, which is characterized in that in described seam weld
Cyclelog is issuing control VT1、VT3Or VT2、VT4Grid control signal while, issue trigger generator
Enabling signal makes its output-scr1、SCR2、SCR3Start pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821936934.6U CN209157380U (en) | 2018-11-23 | 2018-11-23 | High-power IGBT commutation type welding resistance power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821936934.6U CN209157380U (en) | 2018-11-23 | 2018-11-23 | High-power IGBT commutation type welding resistance power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209157380U true CN209157380U (en) | 2019-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821936934.6U Expired - Fee Related CN209157380U (en) | 2018-11-23 | 2018-11-23 | High-power IGBT commutation type welding resistance power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209157380U (en) |
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2018
- 2018-11-23 CN CN201821936934.6U patent/CN209157380U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190726 |