CN105414714B - A kind of primary constant-current circuit of inverter type welder - Google Patents
A kind of primary constant-current circuit of inverter type welder Download PDFInfo
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- CN105414714B CN105414714B CN201511027518.5A CN201511027518A CN105414714B CN 105414714 B CN105414714 B CN 105414714B CN 201511027518 A CN201511027518 A CN 201511027518A CN 105414714 B CN105414714 B CN 105414714B
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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
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
- B23K9/1056—Power supply characterised by the electric circuit by using digital means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Inverter Devices (AREA)
- Arc Welding Control (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The invention provides a kind of primary constant-current circuit of inverter type welder, including major loop and control loop, the major loop includes main by power switch pipe Q3, Q5, clamp diode D3, D4, high-frequency isolation transformer T1, sample transformer T2, commutation diode D10, D11, sustained diode 12, D13, D15, the two-tube single ended forward circuit of inductance L2 compositions；The control loop includes two-way, wherein being all the way the output short circuit protection circuit of welding machine, separately leads up to the adjustment that PI adjusts circuit, the pulse signal that control signal is exported constantly is adjusted pulse duty factor, so that welding machine output constant current.The present invention in the primary increase circuit of inverter type welder by realizing the constant current output characteristic of welding machine.
Description
Technical field
The present invention relates to a kind of circuit, more particularly to a kind of primary constant-current circuit of inverter type welder.
Background technology
Inverter type welder can realize different welding procedures using different output external characteristics, for manual electric arc welding
Two kinds of characteristics can drop using steep drop is gentle, and it is more satisfactory using steep drop characteristic for argon arc welding.The many work(of inverter type welder
Energyization is a direction, and a machine has argon arc welding concurrently and stick electrode welds two kinds of functions, needs to use for such welding machine
Steep drop characteristic is realized.Steep drop characteristic requires that welding machine is output as current constant control, and many at present is the output in welding machine by the way of
End adds electric current Hall sensor to realize, cost is higher, and is realized using sampling resistor, and antijamming capability is poor.
The content of the invention
For defect present in above-mentioned prior art, it is an object of the invention to provide a kind of primary constant current of inverter type welder
Circuit, the constant current output characteristic of welding machine is realized in the primary increase circuit of inverter type welder.
In order to achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of primary constant-current circuit of inverter type welder, including major loop and control loop, the major loop include it is main by
Power switch pipe Q3, Q5, clamp diode D3, D4, high-frequency isolation transformer T1, sample transformer T2, commutation diode D10,
D11, sustained diode 12, D13, D15, the two-tube single ended forward circuit of inductance L2 compositions；The control loop includes two-way,
Wherein it is the output short circuit protection circuit of welding machine all the way, separately leads up to the adjustment that PI adjusts circuit, makes what control signal was exported
Pulse signal constantly adjusts pulse duty factor, so that welding machine output constant current.
The major loop also includes main by resistance R30, electric capacity C17, diode D1 and resistance R31, electric capacity C18, two
The RCD uptake pathways of pole pipe D2 compositions, for protecting power switch pipe Q3, Q5 trouble free service.
The major loop also includes main by resistance R32, electric capacity C20 and resistance R33, electric capacity C21 composition RC absorption mesh
Network, protection diode D10, D11, D12, D13, D15 trouble free service.
The major loop also includes positive and negative electric capacity C22, the C23 being output between machine casing for being connected on welding machine, plays suppression
Make the effect bothered.
Output short circuit protection circuit in the control loop includes resistance R9, R10, R13 and pwm chip U1, adopts
The signal IF that sample transformer T2 is sampled, is converted into after voltage signal by clamp diode D3 rectifications, then by resistance R05,
Pwm chip U1 3 pin CS ends are wherein given by resistance R9, R10, R13 partial pressure all the way, the output short-circuit for welding machine is protected
Shield, it is ensured that power switch pipe Q3, Q5 occur without the phenomenon of excessively stream in whole welding process.
The PI regulations circuit is mainly made up of amplifier U2D, electric capacity C8, resistance R11, the letter that sampling transformer T2 is sampled
Number IF, is converted into after voltage signal by clamp diode D3 rectifications, then by resistance R05, resistance R023 is led up in addition,
Triode Q18 is arrived after electric capacity C63 filtering, then circuit is followed with resistance R166, electric capacity C61 composition, the electric current that T2 is sampled is anti-
Feedback signal is sent to resistance R167, R024 progress partial pressure formation feedback signal IF, feedback signal IF and is connected to the negative of amplifier U2D through R8
End, amplifier U2D positive input terminal, which is fetched to the output end of current settings signal Ig, PI the regulation circuit of panel, passes through diode D8
One end, 1 pin COMP ends of resistance R12 and control chip are connected, and COMP terminal voltages are controlled by PI regulation circuits, are constantly adjusted
It is whole.
Also include the vibration protection circuit being made up of voltage-stabiliser tube D6 and diode D8, prevent vibration, prevention appearance was controlled
Journey is lacked of proper care.
Circuit provided by the present invention, can not only realize the constant current output of inverter type welder, and circuit is simple, constant current effect
It is good, low cost.
Brief description of the drawings
By reading the detailed description made with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the major loop figure of the primary constant-current circuit for the inverter type welder that the present invention is provided；
Fig. 2 is the control drawing of the primary constant-current circuit for the inverter type welder that the present invention is provided.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that to the ordinary skill of this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
As shown in Figure 1 and Figure 2, the primary constant-current circuit for the inverter type welder that the present invention is provided, includes the major loop of inverter type welder
And control loop.
Wherein, major loop is mainly by power switch pipe Q3, Q5, clamp diode D3, D4, high frequency transformer T1, sampling
Transformer T2, commutation diode D10, D11, sustained diode 12, D13, D15, the two-tube single-end ortho-exciting electricity of inductance L2 compositions
Road.Resistance R30, electric capacity C17, diode D1 and resistance R31, electric capacity C18, the RCD uptake pathways of diode D2 compositions, are used for
Power switch pipe Q3, Q5 trouble free service, resistance R32, electric capacity C20 and resistance R33, electric capacity C21 composition RC uptake pathways are protected,
Protection diode D10, D11, D12, D13, D15 trouble free service, electric capacity C22, C23 are connected on the positive and negative of welding machine and are output to machine casing
Between, play a part of suppressing to bother.Signal HG1, HE, LG1, LE come to welding machine drive circuit, for driving power pipe Q3, Q5
Normal work.T2 is connected on transformer T1 primary side, and the electric current of primary return is flowed through in sampling, and transformer T1 is isolation transformation
Device, plays the transmission of energy, and primary and secondary isolation.
In control loop, the signal IF that sampling transformer is sampled~, by diode D3 rectifications, then pass through resistance
R05 is converted into voltage signal, wherein giving pwm chip U1 3 pin CS ends by resistance R9, R10, R13 partial pressure all the way, uses
In the output short circuit protection of welding machine, it is ensured that power switch pipe Q3, Q5 occur without the phenomenon of excessively stream, electric capacity C5 in whole welding process
For filtering, some interference signals are filtered, protection circuit misoperation is prevented, normal weld is influenceed.Resistance is led up in addition
Triode Q18 is arrived after R023, electric capacity C63 filtering, then circuit is followed with resistance R166, electric capacity C61 composition, the electricity that T2 is sampled
Stream feedback signal is sent to resistance R167, R024 and carries out partial pressure formation feedback signal IF, trimmer potentiometer VR3 for finely tuning feedback letter
Number IF.Feedback signal IF is connected to amplifier U2D negative terminal through R8, and U2D positive input terminal is fetched to the current settings signal Ig of panel,
Amplifier U2D, electric capacity C8, resistance R11 composition PI regulation circuits, the output end of PI regulations pass through diode D8 one end, resistance R12
It is connected with 1 pin COMP ends of control chip.In the course of work, the control that comp terminal voltages are adjusted by PI is constantly adjusted, so that
The pulse signal of control signal output constantly adjusts pulse duty factor.Reach and allow the effect of welding machine output constant current.Voltage-stabiliser tube D6
With the diode D8 other end, shield, prevent vibration, control process imbalance occurs in prevention.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substance of the present invention.
Claims (6)
1. the primary constant-current circuit of a kind of inverter type welder, it is characterised in that including major loop and control loop, the major loop bag
Include main by power switch pipe Q3, Q5, clamp diode D3, D4, high-frequency isolation transformer T1, sampling transformer T2, rectification two
Pole pipe D10, D11, sustained diode 12, D13, D15, the two-tube single ended forward circuit of inductance L2 compositions；The control loop bag
Two-way is included, wherein being all the way the output short circuit protection circuit of welding machine, the adjustment that PI adjusts circuit is separately led up to, makes control signal
The pulse signal of output constantly adjusts pulse duty factor, so that welding machine output constant current；
The PI regulations circuit is mainly made up of amplifier U2D, electric capacity C8, resistance R11, the signal sampled by sampling transformer T2
IF, is converted into after voltage signal by clamp diode D3 rectifications, then by resistance R05, resistance R023, electricity is led up in addition
Hold and triode Q18 is arrived after C63 filtering, then circuit is followed with resistance R166, electric capacity C61 composition, the T2 signal IF sampled are sent
Partial pressure formation feedback signal IF, feedback signal IF are carried out to resistance R167, R024, and amplifier U2D negative terminal, amplifier U2D are connected to through R8
Positive input terminal fetch to the current settings signal Ig of panel, the output end of PI regulation circuits passes through diode D8 one end, electricity
The 1 pin COMP ends for hindering R12 and control chip are connected, and COMP terminal voltages are controlled by PI regulation circuits, are constantly adjusted.
2. the primary constant-current circuit of inverter type welder according to claim 1, it is characterised in that the major loop also includes master
The RCD uptake pathways to be made up of resistance R30, electric capacity C17, diode D1 and resistance R31, electric capacity C18, diode D2, are used
In protection power switch pipe Q3, Q5 trouble free service.
3. the primary constant-current circuit of inverter type welder according to claim 1, it is characterised in that the major loop also includes master
The RC uptake pathways to be made up of resistance R32, electric capacity C20 and resistance R33, electric capacity C21, for protection diode D10, D11,
D12, D13, D15 trouble free service.
4. the primary constant-current circuit of inverter type welder according to claim 1, it is characterised in that the major loop also includes connecting
Positive and negative electric capacity C22, C23 being output between machine casing of welding machine is connected on, plays a part of suppressing to bother.
5. the primary constant-current circuit of inverter type welder according to claim 1, it is characterised in that defeated in the control loop
Go out short-circuit protection circuit including resistance R9, R10, R13 and pwm chip U1, the signal IF sampled by sampling transformer T2,
It is converted into by clamp diode D3 rectifications, then by resistance R05 after voltage signal, wherein passing through resistance R9, R10, R13 all the way
Partial pressure gives pwm chip U1 3 pin CS ends, the output short circuit protection for welding machine, it is ensured that power in whole welding process
Switching tube Q3, Q5 occur without the phenomenon of excessively stream.
6. the primary constant-current circuit of inverter type welder according to claim 5, it is characterised in that also including by voltage-stabiliser tube D6 with
The vibration protection circuit of diode D8 compositions, prevents vibration, and control process imbalance occurs in prevention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511027518.5A CN105414714B (en) | 2015-12-31 | 2015-12-31 | A kind of primary constant-current circuit of inverter type welder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511027518.5A CN105414714B (en) | 2015-12-31 | 2015-12-31 | A kind of primary constant-current circuit of inverter type welder |
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| Publication Number | Publication Date |
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| CN105414714A CN105414714A (en) | 2016-03-23 |
| CN105414714B true CN105414714B (en) | 2017-07-11 |
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| CN201511027518.5A Active CN105414714B (en) | 2015-12-31 | 2015-12-31 | A kind of primary constant-current circuit of inverter type welder |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106425027B (en) * | 2016-07-13 | 2018-08-10 | 苏州新逸喆电子科技有限公司 | A kind of current control module for wireless electric welding machine |
| CN110098648B (en) * | 2019-04-24 | 2023-07-07 | 青岛海洋科技中心 | Energy management system for ocean observation detection buoy |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2147924Y (en) * | 1992-11-09 | 1993-12-01 | 大兴安岭林管局松岭林业局机械修造厂 | FET inverter energy-saving arc welder |
| CN2190000Y (en) * | 1994-02-03 | 1995-02-22 | 王晓秋 | Low-loss switching on and off IGBT d.c.-a.c. converter arc welder |
| EP0756914A2 (en) * | 1995-08-02 | 1997-02-05 | Miyachi Technos Corporation | Method and apparatus for controlling inverter resistance welding |
| CN201711639U (en) * | 2010-04-16 | 2011-01-19 | 深圳市佳士科技股份有限公司 | Current feedback circuit for inverter arc welding power supply |
| CN202780179U (en) * | 2012-10-11 | 2013-03-13 | 淄博山大奥太电气有限公司 | Overcurrent protection circuit of main circuit of inverter welding machine |
| CN103128425A (en) * | 2012-11-30 | 2013-06-05 | 浙江容大电力工程有限公司 | Portable electric welding machine |
-
2015
- 2015-12-31 CN CN201511027518.5A patent/CN105414714B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2147924Y (en) * | 1992-11-09 | 1993-12-01 | 大兴安岭林管局松岭林业局机械修造厂 | FET inverter energy-saving arc welder |
| CN2190000Y (en) * | 1994-02-03 | 1995-02-22 | 王晓秋 | Low-loss switching on and off IGBT d.c.-a.c. converter arc welder |
| EP0756914A2 (en) * | 1995-08-02 | 1997-02-05 | Miyachi Technos Corporation | Method and apparatus for controlling inverter resistance welding |
| CN201711639U (en) * | 2010-04-16 | 2011-01-19 | 深圳市佳士科技股份有限公司 | Current feedback circuit for inverter arc welding power supply |
| CN202780179U (en) * | 2012-10-11 | 2013-03-13 | 淄博山大奥太电气有限公司 | Overcurrent protection circuit of main circuit of inverter welding machine |
| CN103128425A (en) * | 2012-11-30 | 2013-06-05 | 浙江容大电力工程有限公司 | Portable electric welding machine |
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| CN105414714A (en) | 2016-03-23 |
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Inventor after: Liu Jizhou Inventor after: Li Shuhui Inventor after: Xu Dejin Inventor after: Chen Xuqiang Inventor before: Yi Chong Inventor before: Xu Dejin Inventor before: Li Shuhui |
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