CN102355155A - Welding inverter for steel truss - Google Patents
Welding inverter for steel truss Download PDFInfo
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- CN102355155A CN102355155A CN2011103096676A CN201110309667A CN102355155A CN 102355155 A CN102355155 A CN 102355155A CN 2011103096676 A CN2011103096676 A CN 2011103096676A CN 201110309667 A CN201110309667 A CN 201110309667A CN 102355155 A CN102355155 A CN 102355155A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention relates to a welding inverter for a steel truss. The inverter comprises an embedded system, an auxiliary power supply and an inverter body connected with the auxiliary power supply, and is characterized in that the inverter body comprises a rectifier circuit and a bridge invertion circuit; the rectifier circuit is composed of three diode modules; three public poles of the three diodes are the input ends of the rectifier circuit; three cathodes are connected with one end of a current-limiting resistor in parallel and the anode of a short-circuit thyristor; the other end of the current-limiting resistor is connected with the cathode of the short-circuit thyristor in parallel and then is connected to the positive pole of a filter capacitor; the three positive poles are connected with the negative pole of the filter capacitor in parallel; the positive pole of the filer capacitor is connected with one end of a fuse; the other end of the fuse is connected with the C pole of the upper bridge arm the insulated gate bipolar transistor (IGBT) of the bridge invertion circuit; the negative pole of the filter capacitor is also connected with the E pole of the lower bridge arm IGBT of the bridge invertion circuit; and the direct current of the output pulse of the rectifier circuit is filtered to stable direct current through the filter capacitor to be used as the power supply of the bridge invertion circuit. In the invention, the IGBT full bridge invertion circuit is adopted, and the power factor of the device is improved greatly.
Description
Technical field
The present invention relates to a kind of automatic welder(welding machine) source of welding current that adopts inversion transformation technique, especially a kind of steel bar girder welding inverter.
Background technology
The steel bar girder automatic welding machine has improved production efficiency, has reduced working strength of workers.The source of welding current is the core of steel bar girder automatic welding machine, and the hydraulic mechanism of cooperation PLC control, discharging mechanism are to realize the automatic welding of steel bar girder.The existing steel bar girder automatic welding machine source of welding current adopts the change controllable silicon to trigger phase place and adjusts welding current.Power factor is difficult to improve, and needs to increase capacitor compensation cabinet to improve power factor, uses the 50/60Hz transformer simultaneously, and volume is bigger than normal, waste material, thereby increased cost.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the prior art, a kind of High Power Factor, high efficiency, the inverter of steel bar girder welding cheaply are provided.
According to technical scheme provided by the invention; Said steel bar girder welding inverter; Comprise embedded system and accessory power supply and the inversion casing that is attached thereto, characteristic is: said inversion casing comprises rectification circuit, bridge inverter main circuit, control circuit and drive circuit; Said rectification circuit is a three-phase bridge diode rectifier circuit, is made up of three diode (led) modules, and every diode (led) module comprises two diode in series; Three inputs that public pole is a rectification circuit of diode connect master switch through air switch; Three negative electrode parallel connections of diode are connected to an end of current-limiting resistance and the anode of short circuit thyristor, and the negative electrode of the other end of current-limiting resistance and short circuit thyristor also connects the positive pole that is connected to filter capacitor; Three anode parallel connections of diode are connected to the negative pole of filter capacitor; The positive pole of filter capacitor is connected with an end of fuse again; The C utmost point of brachium pontis IGBT is connected on the other end of fuse and the bridge inverter main circuit, the negative pole of filter capacitor again with bridge inverter main circuit under the E utmost point of brachium pontis IGBT be connected; The direct current of rectification circuit output ripple becomes more level and smooth direct current, as the power supply of bridge inverter main circuit after filter capacitor filtering;
Said embedded system and accessory power supply are connected with control circuit; Control circuit is connected with drive circuit; Comprise two drive circuits in the said inversion casing; Said drive circuit output trigger pulse triggers IGBT; IGBT conducting when trigger impulse is positive level, IGBT turn-offed when trigger impulse was negative level;
The output of said bridge inverter main circuit connects the elementary of transformer, and the secondary fast-recovery commutation circuit that is connected to of transformer is from fast-recovery commutation circuit output weldingvoltage.
Said bridge inverter main circuit comprises four IGBT modules, and 4 IGBT modules are parallelly connected in twos, forms two brachium pontis of bridge inverter main circuit respectively, comprises an IGBT in every IGBT module, and the IGBT of two series connection is called a brachium pontis of bridge inverter main circuit.
Said filter capacitor comprises the electric capacity of two series connection, and grading resistor of every electric capacity parallel connection makes the electric capacity of series connection get identical voltage, prevents that the voltage that fills on the electric capacity from surpassing the withstand voltage of electric capacity.
Said fast-recovery commutation circuit is made up of four fast recovery rectifier diodes, four fast recovery rectifier diode parallel connections in twos, and anode connects two of transformer respectively, and negative electrode connects together and forms the positive pole of output weldingvoltage.
Said control circuit is connected with the control end of short circuit thyristor.
Said embedded system and accessory power supply are connected with power supply and the indication of reporting to the police.
The present invention has the following advantages:
(1) the present invention adopts IGBT full-bridge inverting main circuit, has improved the power factor of equipment greatly;
(2) the present invention adopts system controlled by computer, guarantees the consistency of technology, the storage of many bond pads technological parameter, and the parameter adjustment panel is intuitively indicated, and simplifies the operation;
(3) the present invention's alternating voltage of adopting the inverter rectification and converting 1000Hz into is transported to transformer, reduces manufacturing cost;
(4) the present invention adopts embedded system, has increased faulty indication, makes easy to maintenance.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with concrete accompanying drawing the present invention is described further.
As shown in the figure: steel bar girder welding inverter comprises embedded system and accessory power supply 1, power supply and report to the police indication 2, inversion casing 3, transformer 4, fast-recovery commutation circuit 5, master switch 6, air switch 7, rectification circuit 8, current-limiting resistance 9, short circuit thyristor 10, grading resistor 11, filter capacitor 12, fuse 13, bridge inverter main circuit 14, drive circuit 15, control circuit 16 etc.
The present invention includes embedded system and accessory power supply 1 and the inversion casing 3 that is attached thereto, said inversion casing 3 comprises rectification circuit 8, bridge inverter main circuit 14, control circuit 16 and drive circuit 15; Said rectification circuit 8 is a three-phase bridge diode rectifier circuit, is made up of three diode (led) modules, and every diode (led) module comprises two diode in series; Three inputs that public pole is a rectification circuit 8 of diode connect master switch 6 through air switch 7; Three negative electrode parallel connections of diode are connected to an end of current-limiting resistance 9 and the anode of short circuit thyristor 10, and the negative electrode of the other end of current-limiting resistance 9 and short circuit thyristor 10 also connects the positive pole that is connected to filter capacitor 12; Three anode parallel connections of diode are connected to the negative pole of filter capacitor 12; The positive pole of filter capacitor 12 is connected with an end of fuse 13 again; The C utmost point of brachium pontis IGBT is connected on the other end of fuse 13 and the bridge inverter main circuit 14, and the negative pole of filter capacitor 12 is connected with the E utmost point of 14 times brachium pontis IGBT of bridge inverter main circuit again; In order to limit charging current to big electric capacity; Prevent rectification circuit 8 overcurrents; When air switch 7 closes a floodgate; Serial connection current-limiting resistance 9; Control circuit 16 is connected with the control end of short circuit thyristor 10; Control circuit 16 sends triggering signal and gives short circuit thyristor 10 after a period of time, and short circuit thyristor 10 is with current-limiting resistance 9 short circuits; The direct current of rectification circuit 8 output ripples becomes more level and smooth direct current, as the power supply of bridge inverter main circuit 14 after filter capacitor 12 filtering like this;
Said filter capacitor 12 comprises the electric capacity of two series connection, and grading resistor 11 of every electric capacity parallel connection makes the electric capacity of series connection get identical voltage, prevents that the voltage that fills on the electric capacity from surpassing the withstand voltage of electric capacity;
Said bridge inverter main circuit 14 comprises four IGBT modules, and 4 IGBT modules are parallelly connected in twos, forms two brachium pontis of bridge inverter main circuit respectively, comprises an IGBT in every IGBT module, and the IGBT of two series connection is called a brachium pontis of bridge inverter main circuit;
Said embedded system and accessory power supply 1 are connected with control circuit 16; Control circuit 16 is connected with drive circuit 15; Comprise two drive circuits 15 in the said inversion casing 3; Said drive circuit 15 output trigger pulse triggers IGBT; IGBT conducting when trigger impulse is positive level, IGBT turn-offed when trigger impulse was negative level;
The output of said bridge inverter main circuit 14 connects the elementary of transformer 4, and the secondary fast-recovery commutation circuit 5 that is connected to of transformer 4 is from fast-recovery commutation circuit 5 output weldingvoltages;
Said fast-recovery commutation circuit 5 is made up of four fast recovery rectifier diodes; Four fast recovery rectifier diode parallel connections in twos; Anode connects two of transformer 4 respectively; Negative electrode connects together and forms the positive pole of output weldingvoltage; The centre cap of transformer 4 forms the negative pole of output weldingvoltage, thereby forms single-phase full-wave rectifer circuit;
Said embedded system and accessory power supply 1 are connected with power supply and the indication 2 of reporting to the police.
Embedded system of the present invention is sent enabling signal; If the fault of detecting then stop welding and provide faulty indication; After enabling signal is handled through control circuit 16; Triggering signal by control circuit 16 output 1000Hz; Triggering signal is amplified the bridge inverter main circuit 14 that rear drive is made up of IGBT through drive circuit 15; The output of bridge inverter main circuit 14 connects the elementary of transformer 4, and the secondary of transformer 4 exported the suitable electric current and voltage that is used to weld through the single-phase full wave rectification.Diode (led) module and short circuit thyristor 10 that the IGBT module that bridge inverter main circuit 14 uses, rectification circuit 8 use are contained on the module radiator, are dispelled the heat by fan.
Air switch 7, rectification circuit 8, current-limiting resistance 9, short circuit thyristor 10, filter capacitor 12, drive circuit 15, control circuit 16, bridge inverter main circuit 14 are housed in the inversion casing 3; Inversion casing 3 passes to the 380V alternating current; Behind rectification circuit 8, become the 560V direct current, again by bridge inverter main circuit 14 output ACs.The output of inversion casing connects the elementary of transformer 4, the secondary suitable electric current and voltage of rectification output through fast-recovery commutation circuit 5 of transformer 4.The present invention makes it under resistance heat and pressure, form pad with the overlap joint workpiece of powerful electric current through being compressed by electrode, generally is used for the spot welding of metal material overlap joint.
Claims (6)
1. a steel bar girder welds inverter; The inversion casing (3) that comprises embedded system and accessory power supply (1) and be attached thereto is characterized in that: said inversion casing (3) comprises rectification circuit (8), bridge inverter main circuit (14), control circuit (16) and drive circuit (15); Said rectification circuit (8) is a three-phase bridge diode rectifier circuit, is made up of three diode (led) modules, and every diode (led) module comprises two diode in series; Three inputs that public pole is rectification circuit (8) of diode connect master switch (6) through air switch (7); Three negative electrode parallel connections of diode are connected to an end of current-limiting resistance (9) and the anode of short circuit thyristor (10), and the negative electrode of the other end of current-limiting resistance (9) and short circuit thyristor (10) also connects the positive pole that is connected to filter capacitor (12); Three anode parallel connections of diode are connected to the negative pole of filter capacitor (12); The positive pole of filter capacitor (12) is connected with an end of fuse (13) again; The other end of fuse (13) is connected with the C utmost point of the last brachium pontis IGBT of bridge inverter main circuit (14), and the negative pole of filter capacitor (12) is connected with the E utmost point of the following brachium pontis IGBT of bridge inverter main circuit (14) again; The direct current of rectification circuit (8) output ripple becomes more level and smooth direct current, as the power supply of bridge inverter main circuit (14) after filter capacitor (12) filtering;
Said embedded system and accessory power supply (1) are connected with control circuit (16); Control circuit (16) is connected with drive circuit (15); Comprise two drive circuits (15) in the said inversion casing (3); Said drive circuit (15) output trigger pulse triggers IGBT; IGBT conducting when trigger impulse is positive level, IGBT turn-offed when trigger impulse was negative level;
The output of said bridge inverter main circuit (14) connects the elementary of transformer (4), and the secondary fast-recovery commutation circuit (5) that is connected to of transformer (4) is from fast-recovery commutation circuit (5) output weldingvoltage.
2. steel bar girder welding inverter as claimed in claim 1; It is characterized in that: said bridge inverter main circuit (14) comprises four IGBT modules; 4 IGBT module parallel connections in twos; Two brachium pontis forming bridge inverter main circuit respectively; Comprise an IGBT in every IGBT module, the IGBT of two series connection is called a brachium pontis of bridge inverter main circuit.
3. steel bar girder welding inverter as claimed in claim 1; It is characterized in that: said filter capacitor (12) comprises the electric capacity of two series connection; Every electric capacity parallel connection grading resistor (11) makes the electric capacity of series connection get identical voltage, prevents that the voltage that fills on the electric capacity from surpassing the withstand voltage of electric capacity.
4. steel bar girder welding inverter as claimed in claim 1; It is characterized in that: said fast-recovery commutation circuit (5) is made up of four fast recovery rectifier diodes; Four fast recovery rectifier diode parallel connections in twos; Anode connects two of transformer (4) respectively, and negative electrode connects together and forms the positive pole of output weldingvoltage.
5. steel bar girder welding inverter as claimed in claim 1, it is characterized in that: said control circuit (16) is connected with the control end of short circuit thyristor (10).
6. steel bar girder welding inverter as claimed in claim 1 is characterized in that: said embedded system and accessory power supply (1) are connected with power supply and the indication (2) of reporting to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103096676A CN102355155A (en) | 2011-10-13 | 2011-10-13 | Welding inverter for steel truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103096676A CN102355155A (en) | 2011-10-13 | 2011-10-13 | Welding inverter for steel truss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102355155A true CN102355155A (en) | 2012-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103096676A Pending CN102355155A (en) | 2011-10-13 | 2011-10-13 | Welding inverter for steel truss |
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| Country | Link |
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| CN (1) | CN102355155A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315170A (en) * | 2019-05-31 | 2019-10-11 | 广汽乘用车有限公司 | A kind of midfrequent AC welding system and method for the workshop that is welded |
| CN112737361A (en) * | 2020-12-31 | 2021-04-30 | 江苏东方四通科技股份有限公司 | Direct-current switching power supply with inversion fault protection function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1203704A (en) * | 1995-10-24 | 1998-12-30 | 水气新西兰有限公司 | AC-DC power supply |
| US5977721A (en) * | 1983-02-22 | 1999-11-02 | Nilssen; Ole K. | Controlled power-factor-corrected ballast |
| CN2472407Y (en) * | 2001-04-18 | 2002-01-16 | 吴加林 | Energy saver for local power network |
| CN101127484A (en) * | 2007-05-23 | 2008-02-20 | 中国科学院电工研究所 | A digital high voltage DC power |
| CN202282745U (en) * | 2011-10-13 | 2012-06-20 | 无锡威华电焊机制造有限公司 | Steel bar truss welding inverter |
-
2011
- 2011-10-13 CN CN2011103096676A patent/CN102355155A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5977721A (en) * | 1983-02-22 | 1999-11-02 | Nilssen; Ole K. | Controlled power-factor-corrected ballast |
| CN1203704A (en) * | 1995-10-24 | 1998-12-30 | 水气新西兰有限公司 | AC-DC power supply |
| CN2472407Y (en) * | 2001-04-18 | 2002-01-16 | 吴加林 | Energy saver for local power network |
| CN101127484A (en) * | 2007-05-23 | 2008-02-20 | 中国科学院电工研究所 | A digital high voltage DC power |
| CN202282745U (en) * | 2011-10-13 | 2012-06-20 | 无锡威华电焊机制造有限公司 | Steel bar truss welding inverter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315170A (en) * | 2019-05-31 | 2019-10-11 | 广汽乘用车有限公司 | A kind of midfrequent AC welding system and method for the workshop that is welded |
| CN112737361A (en) * | 2020-12-31 | 2021-04-30 | 江苏东方四通科技股份有限公司 | Direct-current switching power supply with inversion fault protection function |
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| PB01 | Publication | ||
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Application publication date: 20120215 |