CN102806407B - Inverter welding machine - Google Patents
Inverter welding machine Download PDFInfo
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- CN102806407B CN102806407B CN201210210619.6A CN201210210619A CN102806407B CN 102806407 B CN102806407 B CN 102806407B CN 201210210619 A CN201210210619 A CN 201210210619A CN 102806407 B CN102806407 B CN 102806407B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention provides an inverter welding machine which comprises a switch, a driving circuit, a main circuit, a control circuit, a pulse width modulation (PWM) output circuit and a detection circuit, wherein the switch is respectively and electrically connected with the driving circuit, the main circuit, the control circuit, the PWM output circuit and the detection circuit; and the main circuit consists of a first rectifier circuit, a filter circuit, an inverter circuit, a transformer circuit, a second rectifier circuit and an output circuit. According to the inverter welding machine disclosed by the invention, a current peak is reduced, and thus the impact on a powder grid is reduced; input current harmonics are reduced, and thus the pollution to the power grid is greatly reduced; and in addition, compared with a electrolytic capacitor, a non-polarized capacitor has the characteristic that the service life is greatly prolonged, so that the cost is saved.
Description
Technical field
The present invention relates to inverter type welder, refer to a kind of IGBT contravariant digital carbon dioxide protection welding machine especially.
Background technology
Current IGBT inverter type welder in obtain the main flow that extensive use IGBT inverter type welder becomes inverter type welder in powerful inverter type welder, cover SMAW, argon arc welding, CO2 gas shielded arc welding.All Arc Welding Power fields such as metal argon arc welding, it is little that IGBT inverter type welder has volume, lightweight, power and energy saving, can realize welding Precise control, and weak point is that circuit is complicated.Harmonic pollution is had: the input side of inverter type welder adopts the filtering of diode rectification electrochemical capacitor, larger to the dash current of electrical network to electrical network.Intelligence degree is inadequate.
Current IGBT inverter type welder exists following not enough: (1) circuit is complicated, and because inverter type welder exists rectification-inversion-switching process again, circuit link is more, therefore causes control circuit very complicated; (2) because the input side of welding machine adopts the filtering of diode rectification electrochemical capacitor, comparatively large to the dash current of electrical network, therefore have harmonic pollution to electrical network; (3) intellectuality has much room for improvement.
Summary of the invention
The present invention proposes a kind of inverter type welder; solve inverter welder circuit in prior art complicated, electrical network had to harmonic pollution and the low problem of intellectuality; the present invention adopts high-frequency pole-free electric capacity at the input side filter circuit of inverter type welder; i.e. CBB capacity cell; when using inverter type welder of the present invention to carry out manual metal-arc welding to zero load, only have the IGBT contravariant digitlization CO2 gas shielded arc welding of weak electric signal and the dual-purpose welding machine of manual metal-arc welding.
Technical scheme of the present invention is achieved in that
A kind of inverter type welder, it comprises switch, drive circuit, main circuit, control circuit, pulse width modulation (PWM) output circuit and testing circuit;
Described switch and described drive circuit, described main circuit, described control circuit, described PWM output circuit and described testing circuit are all electrically connected;
Described main circuit is made up of the first rectification circuit, filter circuit, inverter circuit, transforming circuit, the second rectification circuit and output circuit; Described first rectification circuit and described filter circuit are electrically connected, described filter circuit and described inverter circuit are electrically connected, described inverter circuit and described transforming circuit are electrically connected, described transforming circuit and described second rectification circuit are electrically connected, and described second rectification circuit and described output circuit are electrically connected;
Described control circuit is electrically connected to described PWM output circuit, and described PWM output circuit and described inverter circuit are electrically connected;
Described testing circuit comprises feedback circuit and signal input testing circuit, and described feedback circuit and described signal input testing circuit are electrically connected, and described testing circuit is electrically connected to described second rectification circuit.
Further, described filter circuit comprises filter, and described filter is polypropylene CBB electric capacity.
Further, be provided with in described drive circuit as described inverter type welder provides the power supply of power.
Further, single-chip microcomputer is provided with in described control circuit.
Further, described transforming circuit comprises insulated gate bipolar transistor IGBT module and insulated gate bipolar transistor IGBT capacitive absorption plate.
Further, described switch is air switch.
Further, described inverter type welder comprises balancing capacitance further.
First rectification circuit of inverter type welder of the present invention adopts high-frequency pole-free electric capacity as filter element, which reduces current spike, reduces the impact to electrical network, reduce Harmonics of Input, greatly reducing the pollution to electrical network; Secondly polarity free capacitor compares electrochemical capacitor, and its life is many, therefore provides cost savings; In addition, the use of high-frequency pole-free electric capacity also saves complicated soft starting circuit; And when switching to manual metal-arc welding state, its zero load only has a very low weak electric signal, IGBT module not inversion, when user touches workpiece welding rod, weak electric signal reaches control panel by output testing circuit after changing, and control panel starts PWM, IGBT and starts the successful process of inversion striking; When user's inoperation, IGBT closes again; The benefit of such design is: (1) floating voltage only has weak electric signal, has ensured the safety of user; (2) extend the service life of IGBT module, provide cost savings, achieve intellectuality.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structured flowchart of inverter type welder of the present invention;
Fig. 2 is the circuit structure diagram of inverter type welder main frame of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
With reference to Fig. 1 and Fig. 2, a kind of inverter type welder (not shown), it comprises switch 1, drive circuit 2, main circuit (not shown), control circuit (not shown), pulse width modulation (PWM) output circuit (not shown) and testing circuit (not shown); Described switch 1 is all electrically connected with described drive circuit 2, described main circuit, described control circuit, described PWM output circuit and described testing circuit; Described main circuit is made up of the first rectification circuit 3, filter circuit 4, inverter circuit 5, transforming circuit 6, second rectification circuit 7 and output circuit 8; Described first rectification circuit 3 is electrically connected with described filter circuit 4, described filter circuit 4 is electrically connected with described inverter circuit 5, described inverter circuit 5 is electrically connected with described transforming circuit 6, described transforming circuit 6 is electrically connected with described second rectification circuit 7, and described second rectification circuit 7 is electrically connected with described output circuit 8; Described control circuit is electrically connected to described PWM output circuit, and described PWM output circuit and described inverter circuit 5 are electrically connected; Described testing circuit comprises feedback circuit (not shown) and signal input testing circuit (not shown), and described feedback circuit and described signal input testing circuit are electrically connected, described testing circuit is electrically connected to described second rectification circuit 7.
Described first rectification circuit 3 in inverter type welder of the present invention is three-phase commutation bridge, and the ac voltage rectifier that power supply exports is become DC voltage.Described filter circuit is provided with electric capacity, and the DC voltage in three-phase commutation bridge is carried out filtering.
Further, described filter circuit 4 comprises filter C, and described filter C is polypropylene CBB electric capacity.The setting of described CBB electric capacity, reduces current spike, reduces the impact to electrical network, reduce Harmonics of Input, greatly reducing the pollution to electrical network; And its more many than the life of electrochemical capacitor in life-span; Save complicated soft starting circuit.
Further, be provided with in described drive circuit 2 as described inverter type welder provides the power supply of power (not shown).
Further, single-chip microcomputer (not shown) is provided with in described control circuit.The setting of described single-chip microcomputer, multiple circuit components is combined, not only greatly reduce electronic devices and components, and improve the space availability ratio of equipment, user in use, too much by circuit wrong, can not decrease rate of breakdown because of connecting line, and user is when keeping in repair, also easily.
Further, described inverter circuit 5 comprises insulated gate bipolar transistor IGBT module 51 and insulated gate bipolar transistor IGBT capacitive absorption plate 52.IGBT (Insulated Gate Bipolar Transistor), insulated gate bipolar transistor, the compound full-control type voltage driven type power semiconductor be made up of BJT (double pole triode) and MOS (insulating gate type field effect tube), has the advantage of the high input impedance of MOSFET and low conduction voltage drop two aspect of GTR concurrently.GTR saturation pressure reduces, and current carrying density is large, but drive current is larger; MOSFET driving power is very little, and switching speed is fast, but conduction voltage drop is large, and current carrying density is little.IGBT combines the advantage of above two kinds of devices, and driving power is little and saturation pressure reduces.Being applicable to very much being applied to DC voltage is that 600V and above converter system are as fields such as alternating current generator, frequency converter, Switching Power Supply, lighting circuit, Traction Drives.
Described IGBT capacitive absorption plate comprises the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5 and the 6th electric capacity C6, and the first electric capacity C1 and the second electric capacity C2 is connected in parallel, and forms the first capacitor combination; 3rd electric capacity C3 and the 4th electric capacity C4 is connected in parallel, and forms the second capacitor combination; 5th electric capacity C5 and the 6th electric capacity C6 is connected in parallel, and forms the 3rd capacitor combination; First capacitor combination, the second capacitor combination and the 3rd capacitor combination are connected in parallel, just form IGBT capacitive absorption plate.
Further, described switch 1 is air switch.The setting of air switch, except completing contact and point deenergizing, the short circuit that still can occur circuit or electrical equipment. heavy overload and under-voltage etc. are protected, while also can infrequently actuating motor.
Further, described inverter type welder comprises balancing capacitance further.Described balancing capacitance comprises the 7th electric capacity C7, the 8th electric capacity C8, the 9th electric capacity C9, the first node 91, second node 92, the 3rd node 93 and the 4th node 94, described first electric capacity C1 is located between described first node 91 and described 4th node 94, described second electric capacity C2 is located between described second node 92 and described 4th node 94, and described 3rd electric capacity C3 is located between described 3rd node 93 and described 4th node 94.
Operationally, first by switch opens, power supply provides driving power for whole inverter type welder to inverter type welder of the present invention, and the ac voltage rectifier that power supply provides by three-phase commutation bridge becomes DC voltage, facilitates other components and parts work; DC voltage is carried out filtering by described filter circuit, DC voltage is reverse into midfrequent AC voltage by described inverter circuit IGBT, midfrequent AC voltage is applied to transforming circuit, alternating voltage after step-down becomes DC voltage through the second rectifier circuit rectifies, carrying out filtering, level and smooth DC voltage is just exported by the output of inverter type welder.
First rectification circuit of inverter type welder of the present invention adopts high-frequency pole-free electric capacity as filter element, which reduces current spike, reduces the impact to electrical network, reduce Harmonics of Input, greatly reducing the pollution to electrical network; Secondly polarity free capacitor compares electrochemical capacitor, and its life is many, therefore provides cost savings; In addition, the use of high-frequency pole-free electric capacity also saves complicated soft starting circuit; And when switching to manual metal-arc welding state, its zero load only has a very low weak electric signal, IGBT module not inversion, when user touches workpiece welding rod, weak electric signal reaches control panel by output testing circuit after changing, and control panel starts PWM, IGBT and starts the successful process of inversion striking; When user's inoperation, IGBT closes again; The benefit of such design is: (1) floating voltage only has weak electric signal, has ensured the safety of user; (2) extend the service life of IGBT module, provide cost savings, achieve intellectuality.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. an inverter type welder, is characterized in that, comprises switch, drive circuit, main circuit, control circuit, pulse width modulation (PWM) output circuit and testing circuit;
Described switch and described drive circuit, described main circuit, described control circuit, described PWM output circuit and described testing circuit are all electrically connected;
Described main circuit is made up of the first rectification circuit, filter circuit, inverter circuit, transforming circuit, the second rectification circuit and output circuit; Described first rectification circuit and described filter circuit are electrically connected, described filter circuit and described inverter circuit are electrically connected, described inverter circuit and described transforming circuit are electrically connected, described transforming circuit and described second rectification circuit are electrically connected, and described second rectification circuit and described output circuit are electrically connected;
Described control circuit is electrically connected to described PWM output circuit, and described PWM output circuit and described inverter circuit are electrically connected;
Described testing circuit comprises feedback circuit and signal input testing circuit, and described feedback circuit and described signal input testing circuit are electrically connected, and described testing circuit is electrically connected to described second rectification circuit;
Described transforming circuit comprises insulated gate bipolar transistor IGBT module and insulated gate bipolar transistor IGBT capacitive absorption plate; Described IGBT capacitive absorption plate comprises the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5 and the 6th electric capacity C6, and the first electric capacity C1 and the second electric capacity C2 is connected in parallel, and forms the first capacitor combination; 3rd electric capacity C3 and the 4th electric capacity C4 is connected in parallel, and forms the second capacitor combination; 5th electric capacity C5 and the 6th electric capacity C6 is connected in parallel, and forms the 3rd capacitor combination; First capacitor combination, the second capacitor combination and the 3rd capacitor combination are connected in parallel;
Described inverter type welder comprises balancing capacitance further, described balancing capacitance comprises the 7th electric capacity C7, the 8th electric capacity C8, the 9th electric capacity C9, the first node, the second node, the 3rd node and the 4th node, described first electric capacity C1 is located between described first node and described 4th node, described second electric capacity C2 is located between described second node and described 4th node, and described 3rd electric capacity C3 is located between described 3rd node and described 4th node.
2. inverter type welder as claimed in claim 1, it is characterized in that, described filter circuit comprises filter, and described filter is polypropylene CBB electric capacity.
3. inverter type welder as claimed in claim 2, is characterized in that, is provided with as described inverter type welder provides the power supply of power in described drive circuit.
4. inverter type welder as claimed in claim 3, is characterized in that, be provided with single-chip microcomputer in described control circuit.
5. inverter type welder as claimed in claim 4, it is characterized in that, described switch is air switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210210619.6A CN102806407B (en) | 2012-06-26 | 2012-06-26 | Inverter welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210210619.6A CN102806407B (en) | 2012-06-26 | 2012-06-26 | Inverter welding machine |
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| CN102806407A CN102806407A (en) | 2012-12-05 |
| CN102806407B true CN102806407B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210210619.6A Expired - Fee Related CN102806407B (en) | 2012-06-26 | 2012-06-26 | Inverter welding machine |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103100785B (en) * | 2013-02-28 | 2015-11-25 | 广州长胜机电有限公司 | A kind of digitlization inverter arc welding machine output stage short circuit automatic protective system |
| CN103706923B (en) * | 2013-12-24 | 2015-09-09 | 浙江颐顿机电有限公司 | A kind of inversion welding machine |
| CN104065362B (en) * | 2014-06-27 | 2016-06-15 | 上海沪工焊接集团股份有限公司 | Inverter type welder bar pulse width restricting circuits |
| CN114211094A (en) * | 2021-12-29 | 2022-03-22 | 浙江业世焊接科技有限公司 | Welding machine control circuit based on PFC circuit |
| CN114147320A (en) * | 2021-12-30 | 2022-03-08 | 浙江业世焊接科技有限公司 | Welding machine circuit with plasma cutting function |
| CN114192934A (en) * | 2021-12-30 | 2022-03-18 | 浙江业世焊接科技有限公司 | Argon arc welding control circuit |
| CN114226919A (en) * | 2022-01-04 | 2022-03-25 | 浙江业世焊接科技有限公司 | Welding machine control circuit based on single chip microcomputer control |
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Family Cites Families (2)
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| JPH01181974A (en) * | 1988-01-14 | 1989-07-19 | Toyota Motor Corp | Arc welding power source |
| CN201294453Y (en) * | 2008-09-23 | 2009-08-19 | 中国北车股份有限公司大连电力牵引研发中心 | Drive circuit for middle and small power drive module |
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| CN2678812Y (en) * | 2003-12-12 | 2005-02-16 | 徐景华 | Inversion welder |
| CN1623717A (en) * | 2004-12-14 | 2005-06-08 | 天力管件有限公司 | Convertion portable copper pipe hard soldering machine |
| CN2930942Y (en) * | 2005-11-07 | 2007-08-08 | 北京时代科技股份有限公司 | Multiheaded inversion welder and input control circuit thereof |
| CN201143590Y (en) * | 2006-11-30 | 2008-11-05 | 曹再华 | Inversion welding source |
| CN101637848A (en) * | 2009-08-17 | 2010-02-03 | 无锡威华电焊机制造有限公司 | Welding power source of steel-grating press welder by using inverting technique |
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| CN202655764U (en) * | 2012-06-26 | 2013-01-09 | 晋江市炜锋焊接设备有限公司 | Inverter welding machine |
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| CN102806407A (en) | 2012-12-05 |
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Owner name: QUANZHOU WEIFENG WELDING EQUIPMENT CO., LTD. Free format text: FORMER NAME: JINJIANG WEIFENG WELDING EQUIPMENT CO., LTD. |
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Address after: Fujian city of Jinjiang province Anhai Town Qiaotou Industrial Zone Patentee after: Wei Feng welding equipment Co., Ltd of Quanzhou City Address before: 362261 Fujian city of Jinjiang province Anhai Town Qiaotou Industrial Zone Patentee before: Jinjiang Weifeng Welding Equipment Co., Ltd. |
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