CN105689880A - Spot welder pulse output control circuit adopting transformer to output direct current pulses - Google Patents
Spot welder pulse output control circuit adopting transformer to output direct current pulses Download PDFInfo
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- CN105689880A CN105689880A CN201610256072.1A CN201610256072A CN105689880A CN 105689880 A CN105689880 A CN 105689880A CN 201610256072 A CN201610256072 A CN 201610256072A CN 105689880 A CN105689880 A CN 105689880A
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- power switch
- control circuit
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- output
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The invention discloses a spot welder pulse output control circuit adopting a transformer to output direct current pulses. The spot welder pulse output control circuit comprises an MCU automatic control circuit, a constant-current constant-voltage control circuit, the pulse transformer B2L, an energy-storage capacitor C, a first power switch V1, a second power switch V2, and a third power switch V3, wherein the pulse transformer B2L, the first power switch V1, the second power switch V2, the third power switch V3 and a fourth power switch V4 form a Y-shaped welding pulse output drive circuit, so that the spot welder pulse output control circuit has a function of switching positive pulse output, negative pulse output or alternate positive-negative direct current pulse output fast at any time, the amplitude and the width of output positive pulses and negative pulses can be adjusted freely as required, and can be different, the polarity of direct current pulses output by the transformer can be switched fast at any time, and the amplitude and the width of the pulses can be adjusted freely. According to the invention, the domestic technology blank that output polarity switching of direct current pulses in the field of spot welders is monopolized by foreign technologies is filled.
Description
Technical field
The present invention relates to electronic spot welder, inverse spot-welding machine, the mash welder pulse output control circuit of especially a kind of transformator output DC pulse。
Background technology
Owing to the product needing welding is ever-changing, so a welding machine is except there to be traditional constant voltage to export, it is also required for constant current output simultaneously and could meet the requirement of high-end user。Therefore the main frame of existing mash welder is welding energy regulation and control part, is provided with regulation and control output pulse amplitude (voltage) and two digital switch of pulse width (time)。Main frame has on and off switch and power output cable (being connected with welding head holder)；Circuit design adopts self-reacting regulation technology, can according to the parameter of soldering tip, the different qualities of weldment automatically adjusts, and makes by the pulse current of soldering tip, burst length and to put on the product of voltage on soldering tip be weld required optimum capacity。
Although achieving progress to a certain extent, but it is limited only to pulse amplitude (voltage) and the adjustment of pulse width (time), first in digital switch, it regulates to belong to has level to regulate, can not adapting to the weldment of particular/special requirement (such as the welding of positive reversed polarity, electrodeless adjustment pulse amplitude and width), therefore, the DC pulse polarity of conditional electronic mash welder transformator output is single, still can not switching at any time, pulse amplitude and width can not accomplish random adjustment。
Summary of the invention
For solving above-mentioned technical problem, it is an object of the invention to provide the mash welder pulse output control circuit that a kind of transformator output DC pulse polarity, amplitude and width can arbitrarily adjust。
The technical solution used in the present invention is:
The mash welder pulse output control circuit of a kind of transformator output DC pulse, including MCU automatic control circuit, constant-current and constant-voltage control circuit, pulse transformer (B2L), storage capacitor (C), the first power switch (V1), the second power switch (V2), the 3rd power switch (V3)；
Described MCU automatic control circuit outfan is connected with constant-current and constant-voltage control circuit to export control signal, constant-current and constant-voltage control circuit respectively through independent drive circuit and the first power switch (V1), the second power switch (V2), the 3rd power switch (V3) control pole connect with according to described control signal output drive signal；
The primary input coil of described pulse transformer (B2L) has three input taps, it is designated as 1,2,3 ends respectively, wherein 1 end is the central contact of pulse transformer primary coil and is connected with storage capacitor (C), 2 ends and the first power switch (V1), the 3rd power switch (V3) are sequentially connected with, and 3 ends and the second power switch (V2), the 3rd power switch (V3) are sequentially connected with；The secondary output winding of pulse transformer (B2L) has two output taps, is designated as 4,5 ends respectively, and 4 ends connect a wherein weld pulse outlet terminal N2, and 5 ends connect another weld pulse outlet terminal N1。
On such scheme basis, described mash welder pulse output control circuit also includes the 4th power switch (V4), 4th power switch (V4) substitutes primary input coil 3 end of described 3rd power switch (V3) and the second power switch (V2), pulse transformer (B2L) and is sequentially connected with, and the control pole of the 4th power switch (V4) is controlled by constant-current and constant-voltage control circuit。
One of kind preferred version of power switch, described first power switch (V1), the second power switch (V2), the 3rd power switch (V3), the 4th power switch (V4) are audion, field effect transistor or insulated gate bipolar transistor IGBT。
The two of the kind preferred version of power switch, described first power switch (V1), the second power switch (V2), the 3rd power switch (V3) are audion, field effect transistor or insulated gate bipolar transistor IGBT。
One of number preferred version of power switch, described first power switch (V1), the second power switch (V2), the 3rd power switch (V3) are a power switch, or two power switch are formed in parallel, or multiple power switch is formed in parallel。
The two of the number preferred version of power switch, described first power switch (V1), the second power switch (V2), the 3rd power switch (V3), the 4th power switch (V4) are a power switch, or two power switch are formed in parallel, or multiple power switch is formed in parallel。
Optimizing further, described mash welder pulse output control circuit also includes voltage feedback circuit, and this voltage feedback circuit input is connected with weld pulse outlet terminal N1, N2 respectively, and voltage feedback circuit outfan is connected with described MCU automatic control circuit。
Optimize further, described mash welder pulse output control circuit also includes current feedback circuit, this current feedback circuit input detects the secondary output winding output electric current of pulse transformer (B2L) by current transformer (A), and current feedback circuit outfan is connected with described MCU automatic control circuit。
Beneficial effects of the present invention:
The electronic spot welder pulse output control circuit of the present invention, by designing pulse transformer B2L and power switch V1, V2, the Y shape weld pulse output driving circuit that V3 (V4) forms, the present invention is made to have positive pulse, the function of negative pulse or the output switching at a high speed at any time of positive and negative alternately DC pulse, and the positive negative pulse stuffing amplitude exported, width can arbitrarily adjust (the amplitude of output positive negative pulse stuffing as required, width can be unequal, the polarity of transformator output DC pulse can switch at a high speed at any time, pulse amplitude, width can arbitrarily adjust), the present invention has broken the DC pulse output polarity switching of mash welder field and has been filled up domestic technique blank by foreign technology technical monopoly。
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further。
Fig. 1 is the circuit theory diagrams of first embodiment of the invention；
Fig. 2 is the circuit theory diagrams of second embodiment of the invention；
Fig. 3 is the circuit theory diagrams of third embodiment of the invention；
Fig. 4 is the circuit theory diagrams of fourth embodiment of the invention；
Fig. 5 is the circuit theory diagrams of fifth embodiment of the invention。
Detailed description of the invention
As shown in Figure 1, for the mash welder pulse output control circuit of first embodiment of the invention, the basis constitutive requirements such as including MCU automatic control circuit, constant-current and constant-voltage control circuit, pulse transformer B2L, storage capacitor C, the first power switch V1, the second power switch V2, the 3rd power switch V3；MCU automatic control circuit and constant-current and constant-voltage control circuit belong to routine techniques in this area, are not key protection points of the present invention, therefore do not replace with module at this open physical circuit。The first power switch V1 of the present embodiment, the second power switch V2, the 3rd power switch V3 kind adopt audion。
The annexation of above-mentioned parts is: described MCU automatic control circuit outfan is connected with constant-current and constant-voltage control circuit to export control signal, constant-current and constant-voltage control circuit respectively through independent drive circuit (respectively U1, U2, U3) and the first power switch V1, the second power switch V2, the 3rd power switch V3 control pole be connected with according to described control signal output drive signal；
On above-mentioned connection basis, the main innovation point of the present invention is in that by designing pulse transformer B2L and power switch V1, V2, the Y shape weld pulse output driving circuit of V3 composition, referring specifically to Fig. 1, the primary input coil of pulse transformer B2L has three input taps, it is designated as 1 respectively, 2, 3 ends, wherein 1 end is the central contact of pulse transformer primary coil and is connected with storage capacitor C, 2 ends and the first power switch V1, 3rd power switch V3 is sequentially connected with and just (is bearing) pulse output driving branch road to constitute, 3 ends and the second power switch V2, 3rd power switch V3 is sequentially connected with to constitute negative (just) pulse output and drives branch road；The secondary output winding of pulse transformer B2L has two output taps, is designated as 4,5 ends respectively, and 4 ends connect a wherein weld pulse outlet terminal N2, and 5 ends connect another weld pulse outlet terminal N1。
Certainly, the technical program also includes the supporting afterflow protection circuit being made up of diode D1, D2, D3, D4, resistance R1, electric capacity C1, C2, resistance R2, C3, and concrete annexation is referring to accompanying drawing。
In addition, in order to help MCU automatic control circuit to provide reference when exporting control signal, it is additionally provided with voltage feedback circuit to detect output voltage, this voltage feedback circuit input is connected with weld pulse outlet terminal N1, N2 respectively, and voltage feedback circuit outfan is connected with described MCU automatic control circuit。Corresponding, mash welder pulse output control circuit is additionally provided with current feedback circuit, this current feedback circuit input detects the secondary output winding output electric current of pulse transformer B2L by current transformer A, and current feedback circuit outfan is connected with described MCU automatic control circuit。
The work process of the present invention is as follows:
(1) when being controlled constant voltage constant current control circuit output U1, U3 drive control signal driving power switch V1, V3 work by MCU automatic control circuit, the electric energy VCC that storage capacitor C stores produces the electric current 1--2 end via pulse transformer B2L to the colelctor electrode C of power switch V1, the colelctor electrode C to power switch V3 is exported by the emitter E of power switch V1, exported to VCC power supply ground by the emitter E of power switch V3 again, the secondary 4--5 end of pulse transformer B2L produces weld pulse, being exported positive pulse by N2 end, N1 end is by exporting negative pulse。
(2) when being controlled constant voltage constant current control circuit output U2, U3 drive control signal driving power switch V2, V3 work by MCU automatic control circuit, the electric energy VCC that electric capacity C stores produces the electric current 1--3 end via pulse transformer B2L to the colelctor electrode C of power switch V2, the colelctor electrode C to power switch V3 is exported by the emitter E of power switch V2, exported to VCC power supply ground by the emitter E of power switch V3 again, the secondary 4--5 end of pulse transformer B2L produces weld pulse, being exported positive pulse by N1 end, N2 end is by exporting negative pulse。
(3) secondary 4 end having been described pulse transformer B2L by above-mentioned 1,2 steps exports the function of the positive pulse of weld pulse, negative pulse or positive and negative DC pulse output switching at a high speed at any time alternately to N2,5 ends to N1。
As shown in Figure 2, for the second embodiment improved on above-mentioned first embodiment scheme basis, concrete improvement is: mash welder pulse output control circuit also includes the 4th power switch V4,4th power switch V4 substitutes described 3rd power switch V3 and the second power switch V2, primary input coil 3 end of pulse transformer B2L is sequentially connected with, and the control pole of the 4th power switch V4 is controlled by constant-current and constant-voltage control circuit。The operation principle of the present embodiment is identical with first embodiment, it is therefore intended that include circuit variation。
As shown in Figure 3, for the 3rd embodiment improved on above-mentioned first embodiment scheme basis, concrete improvement is: the first power switch V1, the second power switch V2, the 3rd power switch V3 adopt field effect transistor to replace audion, field effect transistor is parallel with a diode, but the kind of power switch is not limited only to audion and field effect transistor, other known power switch that can realize equal function are also applied for the present invention, such as insulated gate bipolar transistor IGBT or other power switch。
As shown in Figure 4, for the 4th embodiment improved on above-mentioned 3rd embodiment scheme basis, concrete improvement is: mash welder pulse output control circuit also includes the 4th power switch V4, adopt field effect transistor equally, 4th power switch V4 substitutes described 3rd power switch V3 and the second power switch V2, primary input coil 3 end of pulse transformer B2L is sequentially connected with, and the control pole of the 4th power switch V4 is controlled by constant-current and constant-voltage control circuit。The operation principle of the present embodiment is identical with first embodiment, it is therefore intended that include circuit variation。
As shown in Figure 5, for the 5th embodiment improved on above-mentioned first embodiment scheme basis, concrete improvement is: improve the number of power switch, first power switch V1, the second power switch V2, the 3rd power switch V3 are no longer a power switch, but adopting two power switch to be formed in parallel, the operation principle of the present embodiment is identical with first embodiment, it is therefore intended that include circuit devcie number change, under same inventive concept, it is also possible to be that multiple power switch is formed in parallel。
Can be seen that as mentioned above, the electronic spot welder pulse output control circuit of the present invention, by designing pulse transformer B2L and power switch V1, V2, the Y shape weld pulse output driving circuit of V3V4 composition, the present invention is made to have positive pulse, the function of negative pulse or the output switching at a high speed at any time of positive and negative alternately DC pulse, and the positive negative pulse stuffing amplitude exported, width can arbitrarily adjust the amplitude of output positive negative pulse stuffing as required, width can be unequal, the polarity of transformator output DC pulse can switch at a high speed at any time, pulse amplitude, width can arbitrarily adjust, the present invention has broken the DC pulse output polarity switching of mash welder field and has been filled up domestic technique blank by foreign technology technical monopoly。
The foregoing is only the preferred embodiments of the present invention, the present invention is not limited to above-mentioned embodiment, broadly falls within protection scope of the present invention as long as realizing the technical scheme of the object of the invention with essentially identical means。
Claims (8)
1. the mash welder pulse output control circuit of a transformator output DC pulse, it is characterised in that: include MCU automatic control circuit, constant-current and constant-voltage control circuit, pulse transformer (B2L), storage capacitor (C), the first power switch (V1), the second power switch (V2), the 3rd power switch (V3)；
Described MCU automatic control circuit outfan is connected with constant-current and constant-voltage control circuit to export control signal, constant-current and constant-voltage control circuit respectively through independent drive circuit and the first power switch (V1), the second power switch (V2), the 3rd power switch (V3) control pole connect with according to described control signal output drive signal；
The primary input coil of described pulse transformer (B2L) has three input taps, it is designated as 1,2,3 ends respectively, wherein 1 end is the central contact of pulse transformer primary coil and is connected with storage capacitor (C), 2 ends and the first power switch (V1), the 3rd power switch (V3) are sequentially connected with, and 3 ends and the second power switch (V2), the 3rd power switch (V3) are sequentially connected with；The secondary output winding of pulse transformer (B2L) has two output taps, is designated as 4,5 ends respectively, and 4 ends connect a wherein weld pulse outlet terminal N2, and 5 ends connect another weld pulse outlet terminal N1。
2. mash welder pulse output control circuit according to claim 1, it is characterized in that: it also includes the 4th power switch (V4), 4th power switch (V4) substitutes primary input coil 3 end of described 3rd power switch (V3) and the second power switch (V2), pulse transformer (B2L) and is sequentially connected with, and the control pole of the 4th power switch (V4) is controlled by constant-current and constant-voltage control circuit。
3. mash welder pulse output control circuit according to claim 2, it is characterised in that: described first power switch (V1), the second power switch (V2), the 3rd power switch (V3), the 4th power switch (V4) they are audion, field effect transistor or insulated gate bipolar transistor IGBT。
4. mash welder pulse output control circuit according to claim 1, it is characterised in that: described first power switch (V1), the second power switch (V2), the 3rd power switch (V3) they are audion, field effect transistor or insulated gate bipolar transistor IGBT。
5. mash welder pulse output control circuit according to claim 1, it is characterized in that: described first power switch (V1), the second power switch (V2), the 3rd power switch (V3) are a power switch, or two power switch are formed in parallel, or multiple power switch is formed in parallel。
6. mash welder pulse output control circuit according to claim 2, it is characterized in that: described first power switch (V1), the second power switch (V2), the 3rd power switch (V3), the 4th power switch (V4) are a power switch, or two power switch are formed in parallel, or multiple power switch is formed in parallel。
7. mash welder pulse output control circuit according to claim 1, it is characterized in that: it also includes voltage feedback circuit, this voltage feedback circuit input is connected with weld pulse outlet terminal N1, N2 respectively, and voltage feedback circuit outfan is connected with described MCU automatic control circuit。
8. mash welder pulse output control circuit according to claim 1, it is characterized in that: it also includes current feedback circuit, this current feedback circuit input detects the secondary output winding output electric current of pulse transformer (B2L) by current transformer (A), and current feedback circuit outfan is connected with described MCU automatic control circuit。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610256072.1A CN105689880B (en) | 2016-04-22 | 2016-04-22 | Spot welding machine pulse output control circuit with transformer outputting direct current pulse |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610256072.1A CN105689880B (en) | 2016-04-22 | 2016-04-22 | Spot welding machine pulse output control circuit with transformer outputting direct current pulse |
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| CN105689880A true CN105689880A (en) | 2016-06-22 |
| CN105689880B CN105689880B (en) | 2018-03-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108372354A (en) * | 2018-02-05 | 2018-08-07 | 广州双穗电气设备有限公司 | A kind of novel pulse direct current source of welding current |
| CN111774709A (en) * | 2020-07-10 | 2020-10-16 | 珠海微点焊电子工业有限公司 | Control circuit of direct current welding machine with positive and negative rotation of output current |
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| CN202763272U (en) * | 2012-05-25 | 2013-03-06 | 东莞市威顺焊接设备有限公司 | Spot welder capable of providing dual mode outputs of constant voltage and constant current |
| CN103368439A (en) * | 2009-05-27 | 2013-10-23 | 松下电器产业株式会社 | Inverter control device |
| CN103358004A (en) * | 2012-03-27 | 2013-10-23 | 穆业森 | High-frequency direct-current resistance seam welder |
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Patent Citations (7)
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| JPS60255289A (en) * | 1984-05-30 | 1985-12-16 | Dengensha Mfg Co Ltd | Constant-current controlling method of resistance welding machine and its device |
| CN2611089Y (en) * | 2003-01-21 | 2004-04-14 | 杨仕桐 | Resistance welding spot welding machine with output pulse amplitude and width gang control |
| CN101121218A (en) * | 2006-08-07 | 2008-02-13 | 珠海微点焊电子工业有限公司 | Electronic spot welding machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108372354A (en) * | 2018-02-05 | 2018-08-07 | 广州双穗电气设备有限公司 | A kind of novel pulse direct current source of welding current |
| CN111774709A (en) * | 2020-07-10 | 2020-10-16 | 珠海微点焊电子工业有限公司 | Control circuit of direct current welding machine with positive and negative rotation of output current |
| CN111774709B (en) * | 2020-07-10 | 2022-03-18 | 珠海微点焊电子工业有限公司 | Control circuit of direct current welding machine with positive and negative rotation of output current |
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| CN105689880B (en) | 2018-03-13 |
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Address after: 528400 Guangdong city of Zhongshan province Shan five long Water Street No. 12 Applicant after: Zhongshan Micro Welding Technology Co., Ltd. Address before: 528400 Guangdong city of Zhongshan province Shan five long water village city Guangxi Road No. 12 five floor of Applicant before: Zhongshan Vihan Electronic Equipment Co., Ltd. |
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