CN114211094A - Welding machine control circuit based on PFC circuit - Google Patents
Welding machine control circuit based on PFC circuit Download PDFInfo
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- CN114211094A CN114211094A CN202111635531.4A CN202111635531A CN114211094A CN 114211094 A CN114211094 A CN 114211094A CN 202111635531 A CN202111635531 A CN 202111635531A CN 114211094 A CN114211094 A CN 114211094A
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- control circuit
- welding machine
- pfc
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- 238000003466 welding Methods 0.000 title claims abstract description 39
- 208000037516 chromosome inversion disease Diseases 0.000 claims description 22
- 238000011084 recovery Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims 2
- 238000011105 stabilization Methods 0.000 claims 2
- 230000008901 benefit Effects 0.000 description 11
- 239000013078 crystal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/067—Starting the arc
-
- 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
-
- 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)
- Dc-Dc Converters (AREA)
- Arc Welding Control (AREA)
Abstract
The invention discloses a welding machine control circuit based on a PFC circuit, belonging to the field of control circuits, and comprising a power supply and a digital control module, wherein the power supply is connected with a power switch, the power supply is connected with a soft start circuit and a primary rectifying circuit through the power switch, two ends of the primary rectifying circuit are also connected with the PFC circuit, the output end of the PFC circuit is connected with a primary inverter circuit, the primary inverter circuit is also connected with a main transformer circuit, the output end of the primary inverter circuit is connected with the input end of the main transformer circuit, and the output end of the main transformer circuit is connected with a secondary rectifying circuit Stable welding arc and the like.
Description
Technical Field
The invention relates to the field of control circuits, in particular to a welding machine control circuit based on a PFC circuit.
Background
The welding machine is an electric appliance which provides a power supply with certain characteristics for welding, the welding is flexible, simple, convenient, firm and reliable, the welding machine has the advantage of strength equal to that of base metal after welding and is widely applied to various industrial fields, and the output power supply provided by the welding machine is stable and reliable for ensuring the strength of welding spots.
In order to improve the stability of the output power supply of the welding machine, some welding machines adopt a BOOST circuit to BOOST the voltage to a set voltage value, so that the stability of the welding machine is improved while the energy conservation and the environmental protection are realized. In practical use, however, if the current is too large during the boosting process, the magnetic saturation of the inductor of the circuit and the damage of the switching device can be easily caused, and the protection switch in the circuit can be tripped, so that the equipment cannot be normally used.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a welding machine control circuit based on a PFC circuit, which can improve the stability of the welding machine control circuit, has the advantages of simple PFC circuit, low price, circuit cost reduction and product competitiveness improvement, and has the advantages of small harmonic interference, high power factor, strong power grid adaptability, stable welding arc and the like.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A welding machine control circuit based on a PFC circuit comprises a power supply and a digital control module, wherein the power supply is connected with a power switch, the power supply is connected with a soft start circuit and a primary rectifying circuit through the power switch, two ends of the primary rectifying circuit are also connected with the PFC circuit, the output end of the PFC circuit is connected with a primary inverter circuit, the primary inverter circuit is also connected with a main transformer circuit, the output end of the primary inverter circuit is connected with the input end of the main transformer circuit, the output end of the main transformer circuit is connected with a secondary rectifying circuit, the main transformer circuit is connected with a secondary inverter circuit through the secondary rectifying circuit, the output end of the secondary inverter circuit is connected with a reactor, the secondary inverter circuit is connected with the output end of a welding machine through the reactor, the digital control module is respectively connected with a PWM control circuit, a secondary inverter driving module and an arc stabilizing pulse module, the secondary inversion driving module is connected with a secondary inversion circuit, the arc stabilizing pulse module is connected between the reactor and the output end of the welding machine, a plurality of wiring terminals of the PWM control circuit are provided, two wiring terminals are respectively connected with the soft start circuit and the PFC circuit to play corresponding control role, the wiring terminals of the PWM control circuit are also connected with a fan, the environment where the circuit is positioned is cooled by controlling the start of the fan, the high-temperature damage of circuit elements is prevented, the wiring terminals of the PWM control circuit are also connected with a primary inversion driving module which is also connected with the primary inversion circuit, the wiring terminals of the PWM control circuit are also connected with a current sampling module, the main transformer circuit is also connected with the current sampling module, the wiring terminals of the PWM control circuit are also connected with a high-frequency arc striking module which is also connected with the reactor, the stability of the control circuit of the welding machine can be improved, the PFC circuit is simple and low in price, the circuit cost is reduced, the competitiveness of products is improved, and the PFC circuit further has the advantages of small harmonic interference, high power factor, strong power grid adaptability, stable welding arc and the like.
Furthermore, a rectifier bridge with the model number of GBPC5010 is adopted as a primary rectifier device of the primary rectifier circuit, so that a good rectification effect can be achieved.
Furthermore, the primary inverter circuit is mainly composed of insulated gate bipolar transistors, the insulated gate bipolar transistors are FGH60N60SMD, the four insulated gate bipolar transistors form a full-bridge inverter circuit, each insulated gate bipolar transistor is connected with the RC absorption circuit in parallel, and voltage and current waveforms after primary inversion can be improved to a certain extent.
Furthermore, a ring transformer is adopted in the main transformer circuit, and the turn ratio of the ring transformer is 23: 4.
furthermore, the secondary rectification circuit adopts a full-bridge half-wave rectification mode, four fast recovery diodes are connected in parallel in each group, so that the reliability of the secondary rectification circuit is improved, and the single fast recovery diode is selected according to the standard of 20A/200V.
Furthermore, a control chip in the PWM control circuit controls UC3846 in a constant-frequency current mode, which has the advantages of fast dynamic response speed and wave-by-wave current limiting.
Furthermore, the primary inversion driving module is driven by a driving transformer of the model PQ2020, and the driving scheme is concise and high in reliability.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the scheme can improve the stability of the control circuit of the welding machine, the PFC circuit is simple and low in price, the circuit cost is reduced, the competitiveness of products is improved, and the PFC circuit further has the advantages of small harmonic interference, high power factor, strong power grid adaptability, stable welding arc and the like.
(2) The primary rectification circuit adopts a rectification bridge with the model number of GBPC5010 as a primary rectification device, and can play a good rectification effect.
(3) The primary inverter circuit is mainly composed of insulated gate bipolar crystals, the insulated gate bipolar crystals are FGH60N60SMD, the full-bridge inverter circuit is composed of four insulated gate bipolar crystals, each insulated gate bipolar crystal is connected with the RC absorption circuit in parallel, and voltage and current waveforms after primary inversion can be improved to a certain extent.
(4) Adopt toroidal transformer among the main transformer circuit, have the advantage that the heat dissipation is fast, the leakage inductance is little, and this toroidal transformer's turn ratio is 23: 4.
(5) the secondary rectification circuit adopts a full-bridge half-wave rectification mode to improve the reliability of the secondary rectification circuit, each group adopts four fast recovery diodes which are connected in parallel, and a single fast recovery diode adopts a 20A/200V standard.
(6) A control chip in the PWM control circuit adopts a constant-frequency current mode to control the UC3846, and the PWM control circuit has the advantages of high dynamic response speed and wave-by-wave current limiting.
(7) The primary inversion driving module is driven by a driving transformer of the model PQ2020, and the driving scheme is concise and high in reliability.
Drawings
Fig. 1 is a circuit diagram of the present invention.
The reference numbers in the figures illustrate:
the system comprises a power supply 1, a power switch 2, a soft start circuit 3, a primary rectification circuit 4, a PFC circuit 5, a primary inverter circuit 6, a primary transformer circuit 7, a secondary rectification circuit 8, a fan 9, a primary inverter driving module 10, a current sampling module 11, a high-frequency arc striking module 12, a PWM control circuit 13 and a digital control module 14.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, a welding machine control circuit based on a PFC circuit includes a power supply 1 and a digital control module 14, the power supply 1 is connected with a power switch 2, and the power supply 1 is connected with a soft start circuit 3 and a primary rectification circuit 4 through the power switch 2, wherein the primary rectification circuit 4 adopts a rectification bridge of GBPC5010 as a primary rectification device, which can achieve a good rectification effect, and both ends of the primary rectification circuit 4 are also connected with a PFC circuit 5, an output end of the PFC circuit 5 is connected with a primary inverter circuit 6, the primary inverter circuit 6 is mainly composed of insulated gate bipolar transistors, the insulated gate bipolar transistors adopt FGH60N60SMD, a full bridge inverter circuit is composed of four insulated gate bipolar transistors, and each insulated gate bipolar transistor is connected in parallel with an RC absorption circuit, which can improve the voltage and current waveforms after primary inversion to a certain extent, the primary inverter circuit 6 is also connected with a main transformer circuit 7, and a ring transformer is adopted in the main transformer circuit 7, so that the heat dissipation is fast, the leakage inductance is small, and the turn ratio of the ring transformer is 23: 4, the output end of the primary inverter circuit 6 is connected with the input end of the main transformer circuit 7, the output end of the main transformer circuit 7 is connected with a secondary rectifier circuit 8, the secondary rectifier circuit 8 adopts a full-bridge half-wave rectification mode, each group adopts four fast recovery diodes which are connected in parallel to improve the reliability of the secondary rectifier circuit 8, a single fast recovery diode adopts the 20A/200V standard, the main transformer circuit 7 is connected with a secondary inverter circuit through the secondary rectifier circuit 8, the output end of the secondary inverter circuit is connected with a reactor, the secondary inverter circuit is connected with the output end of the welding machine through the reactor, the digital control module 14 is respectively connected with a PWM control circuit 13, a secondary inverter driving module and an arc stabilizing pulse module, the secondary inverter driving module is connected with the secondary inverter circuit, the arc stabilizing pulse module is connected between the reactor and the output end of the welding machine, a control chip in the PWM control circuit 13 controls UC3846 in a constant-frequency current mode, and has the advantages of high dynamic response speed and wave-by-wave current limiting, wherein a plurality of terminals of the PWM control circuit 13 are provided, two terminals are respectively connected with the soft start circuit 3 and the PFC circuit 5, and play a corresponding control role, the terminals of the PWM control circuit 13 are also connected with the fan 9, the environment where the circuit is located is cooled by controlling the start of the fan 9, and the high-temperature damage of circuit elements is prevented, the terminals of the PWM control circuit 13 are also connected with a primary inversion driving module 10, the primary inversion driving module 10 adopts a driving transformer with the model of PQ2020(15:15) for driving, the driving scheme is simple and high in reliability, the primary inversion driving module 10 is also connected with the primary inversion circuit 6, the terminals of the PWM control circuit 13 are also connected with a current sampling module 11, the main transformer circuit 7 is further connected with a current sampling module 11, a wiring terminal of the PWM control circuit 13 is further connected with a high-frequency arc striking module 12, and the high-frequency arc striking module 12 is further connected to a reactor.
When the power supply is used, the power switch 2 is closed, the PWM control circuit 13 is controlled through the digital control module 14, the soft start circuit 3 is switched on, and the low-voltage and high-frequency square wave alternating current is output after the current output by the power supply 1 is rectified by the primary rectifying circuit 4, boosted and filtered by the PFC circuit, primary inverted by the primary inverting circuit 6 and reduced by the main transformer circuit 7 of the high-frequency transformer; and then the alternating current with variable polarity and lower frequency is finally output through the rectification of the secondary rectification circuit 8 and the secondary inversion of the secondary inversion circuit, so that the stability of the control circuit of the welding machine can be improved, the circuit of the PFC is simple and low in price, the circuit cost is reduced, the competitiveness of the product is improved, and the PFC circuit also has the advantages of small harmonic interference, high power factor, strong power grid adaptability, stable welding arc and the like.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (7)
1. A welding machine control circuit based on a PFC circuit comprises a power supply (1) and a digital control module (14), and is characterized in that: the power supply (1) is connected with a power switch (2), the power supply (1) is connected with a soft start circuit (3) and a primary rectifying circuit (4) through the power switch (2), two ends of the primary rectifying circuit (4) are also connected with a PFC circuit (5), the output end of the PFC circuit (5) is connected with a primary inverter circuit (6), the primary inverter circuit (6) is also connected with a main transformer circuit (7), the output end of the primary inverter circuit (6) is connected with the input end of the main transformer circuit (7), the output end of the main transformer circuit (7) is connected with a secondary rectifying circuit (8), the main transformer circuit (7) is connected with a secondary inverter circuit through the secondary rectifying circuit (8), the output end of the secondary inverter circuit is connected with a reactor, and the secondary inverter circuit is connected with the output end of a welding machine through the reactor, the digital control module (14) is respectively connected with a PWM control circuit (13), a secondary inversion drive module and an arc stabilization pulse module, the secondary inversion drive module is connected with the secondary inversion circuit, the arc stabilization pulse module is connected between a reactor and the output end of a welding machine, a plurality of wiring terminals of the PWM control circuit (13) are provided, two wiring terminals are respectively connected with a soft start circuit (3) and a PFC circuit (5), the wiring terminal of the PWM control circuit (13) is also connected with a fan (9), the wiring terminal of the PWM control circuit (13) is also connected with a primary inversion drive module (10), the primary inversion drive module (10) is also connected with a primary inversion circuit (6), the wiring terminal of the PWM control circuit (13) is also connected with a current sampling module (11), and a main transformer circuit (7) is also connected with the current sampling module (11), and a wiring terminal of the PWM control circuit (13) is also connected with a high-frequency arc striking module (12), and the high-frequency arc striking module (12) is also connected to the reactor.
2. The welding machine control circuit based on the PFC circuit of claim 1, characterized in that: the primary rectifying circuit (4) adopts a rectifying bridge with the model number of GBPC5010 as a primary rectifying device.
3. The welding machine control circuit based on the PFC circuit of claim 1, characterized in that: the primary inverter circuit (6) is mainly composed of insulated gate bipolar transistors, the insulated gate bipolar transistors are FGH60N60SMD, a full-bridge inverter circuit is composed of four insulated gate bipolar transistors, and each insulated gate bipolar transistor is connected with an RC absorption circuit in parallel.
4. The welding machine control circuit based on the PFC circuit of claim 1, characterized in that: a ring transformer is adopted in the main transformer circuit (7), and the turn ratio of the ring transformer is 23: 4.
5. the welding machine control circuit based on the PFC circuit of claim 1, characterized in that: the secondary rectification circuit (8) adopts a full-bridge half-wave rectification mode, four fast recovery diodes are connected in parallel in each group, and the single fast recovery diode adopts the standard of 20A/200V.
6. The welding machine control circuit based on the PFC circuit of claim 1, characterized in that: and a control chip in the PWM control circuit (13) controls UC3846 in a constant-frequency current mode.
7. The welding machine control circuit based on the PFC circuit of claim 1, characterized in that: the primary inversion driving module (10) is driven by a driving transformer with the model of PQ 2020.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111635531.4A CN114211094A (en) | 2021-12-29 | 2021-12-29 | Welding machine control circuit based on PFC circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111635531.4A CN114211094A (en) | 2021-12-29 | 2021-12-29 | Welding machine control circuit based on PFC circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114211094A true CN114211094A (en) | 2022-03-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111635531.4A Withdrawn CN114211094A (en) | 2021-12-29 | 2021-12-29 | Welding machine control circuit based on PFC circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114211094A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1750899A (en) * | 2003-02-14 | 2006-03-22 | 赛尔柯有限公司 | Generator for arc welder with high power factor |
| CN201677116U (en) * | 2010-02-09 | 2010-12-22 | 上海沪通焊接电器制造有限公司 | Insulated gate bipolar transistor inversion AC/DC argon arc welder |
| CN201856022U (en) * | 2010-07-02 | 2011-06-08 | 广东火电工程总公司 | Soft switching IGBT double-inverter type square wave AC-DC (Alternating Current-Direct Current) tungsten-inert-gas welding power source |
| CN102806407A (en) * | 2012-06-26 | 2012-12-05 | 晋江市炜锋焊接设备有限公司 | Inverter welding machine |
| CN103692056A (en) * | 2013-12-19 | 2014-04-02 | 华南理工大学 | Multifunctional digital waveform control arc-welding inverter power supply |
| CN103706923A (en) * | 2013-12-24 | 2014-04-09 | 浙江颐顿机电有限公司 | Inverter welder |
| CN204867739U (en) * | 2015-09-08 | 2015-12-16 | 刘文斌 | Noload voltage adjustable electric welding |
| CN105171187A (en) * | 2015-09-08 | 2015-12-23 | 刘文斌 | Electric welding machine with adjustable no-load voltage |
| CN206717243U (en) * | 2017-04-05 | 2017-12-08 | 吴忠市中心电焊机有限公司 | A kind of PFC inverter type welders |
| CN113145990A (en) * | 2020-12-24 | 2021-07-23 | 上海宗镕电器有限公司 | Digital electric welding machine system integrated with multifunctional welding mode |
-
2021
- 2021-12-29 CN CN202111635531.4A patent/CN114211094A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1750899A (en) * | 2003-02-14 | 2006-03-22 | 赛尔柯有限公司 | Generator for arc welder with high power factor |
| CN201677116U (en) * | 2010-02-09 | 2010-12-22 | 上海沪通焊接电器制造有限公司 | Insulated gate bipolar transistor inversion AC/DC argon arc welder |
| CN201856022U (en) * | 2010-07-02 | 2011-06-08 | 广东火电工程总公司 | Soft switching IGBT double-inverter type square wave AC-DC (Alternating Current-Direct Current) tungsten-inert-gas welding power source |
| CN102806407A (en) * | 2012-06-26 | 2012-12-05 | 晋江市炜锋焊接设备有限公司 | Inverter welding machine |
| CN103692056A (en) * | 2013-12-19 | 2014-04-02 | 华南理工大学 | Multifunctional digital waveform control arc-welding inverter power supply |
| CN103706923A (en) * | 2013-12-24 | 2014-04-09 | 浙江颐顿机电有限公司 | Inverter welder |
| CN204867739U (en) * | 2015-09-08 | 2015-12-16 | 刘文斌 | Noload voltage adjustable electric welding |
| CN105171187A (en) * | 2015-09-08 | 2015-12-23 | 刘文斌 | Electric welding machine with adjustable no-load voltage |
| CN206717243U (en) * | 2017-04-05 | 2017-12-08 | 吴忠市中心电焊机有限公司 | A kind of PFC inverter type welders |
| CN113145990A (en) * | 2020-12-24 | 2021-07-23 | 上海宗镕电器有限公司 | Digital electric welding machine system integrated with multifunctional welding mode |
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| CB03 | Change of inventor or designer information |
Inventor after: Ye Xiaofeng Inventor after: Huang Jingxi Inventor before: Ye Xiaofeng Inventor before: Huang Jingxi |
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Application publication date: 20220322 |
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