CN103475254A - Inverter full-bridge soft switching welding power supply drive circuit - Google Patents
Inverter full-bridge soft switching welding power supply drive circuit Download PDFInfo
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- CN103475254A CN103475254A CN2013104728206A CN201310472820A CN103475254A CN 103475254 A CN103475254 A CN 103475254A CN 2013104728206 A CN2013104728206 A CN 2013104728206A CN 201310472820 A CN201310472820 A CN 201310472820A CN 103475254 A CN103475254 A CN 103475254A
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- igbt pipe
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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 discloses an inverter full-bridge soft switching welding power supply drive circuit comprising a rectifier bridge D1, an IGBT (Gate Bipolar Translator) module and a main transformer T1, wherein the drain electrodes of a first IGBT tube G1 and a third IGBT tube G3 in the IGBT module are connected with the anode output end of the rectifier bridge D1, the source electrodes of a second IGBT tube G2 and a fourth IGBT tube G4 are connected with the cathode output end of the rectifier bridge D1, the source electrode of the first IGBT tube G1 is connected with the drain electrode of the second IGBT tube G2 to form a first inverter power supply output end, and the source electrode of the third IGBT tube G3 is connected with the drain electrode of the fourth IGBT tube G4 to form a second inverter power supply output end. The inverter full-bridge soft switching welding power supply drive circuit provided by the invention can improve the inverter frequency, keep low switching loss and meet high-precision electric arc control.
Description
Technical field
The present invention relates to a kind of source of welding current drive circuit, relate in particular to the soft switch source of welding current of a kind of inversion full-bridge type drive circuit.
Background technology
Along with IGBT(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) inversion transformation technique is more and more ripe, frequency is more and more higher, power is increasing, now be widely used in inversion welding source, what inversion full-bridge soft-switching technology was more stable, ripe at present mainly or at reverse frequency is about the 20KHz left and right, such response speed be difficult to meet to be controlled the high accuracy of electric arc, and power output and welding machine reliability are greatly affected.Reverse frequency is general by IGBT hard switching technology (single-ended forward type, semi-bridge inversion formula, full-bridge (hard switching) contravariant etc.) higher than 20KHZ's, and the use to IGBT is generally single tube, cause the switching loss of IGBT large, during high-power output reliability than low, the main transformer volume is large simultaneously, efficiency is low.
The conventional 40KHZ source of welding current is subject to the igbt chip limitation of the technology, generally can only adopt the IGBT single tube, as shown in Figure 1, rectifier bridge D1, IGBT, main transformer T1 and filter capacitor etc., consists of.Wherein to bring up to switching loss after 40KHZ be larger to the operating frequency of IGBT, and this radiating condition to IGBT has very high requirement.The service efficiency of main transformer T1 iron core is low in addition, and equal conditions lower core cross section is about 1 times of inversion full-bridge soft-switching transformer of welding source, and machine volume is obviously restricted.
Summary of the invention
Technical problem to be solved by this invention is to provide the soft switch source of welding current of a kind of inversion full-bridge type drive circuit, can improve reverse frequency, and keeps lower switching loss, meets the high accuracy of electric arc is controlled.
The present invention solves the problems of the technologies described above the technical scheme adopted to be to provide the soft switch source of welding current of a kind of inversion full-bridge type drive circuit, comprise rectifier bridge D1, IGBT module and main transformer T1, wherein, described IGBT module comprises an IGBT pipe G1, the 2nd IGBT pipe G2, the 3rd IGBT pipe G3 and the 4th IGBT pipe G4; The drain electrode of a described IGBT pipe G1, the 3rd IGBT pipe G3 is connected with the cathode output end of rectifier bridge D1, the source electrode of described the 2nd IGBT pipe G2, the 4th IGBT pipe G4 is connected with the cathode output end of rectifier bridge D1, the drain electrode of the source electrode of a described IGBT pipe G1 and the 2nd IGBT pipe G2 is connected to form the first inverter output, and the drain electrode of the source electrode of described the 3rd IGBT pipe G3 and the 4th IGBT pipe G4 is connected to form the second inverter output; After described the first inverter output, the second inverter output and resonance inductance L 2, resonant capacitance C7 series connection, with the input circuit of main transformer T1, be connected.
The above-mentioned soft switch source of welding current of inversion full-bridge type drive circuit, wherein, the cathode output end of described rectifier bridge D1, cathode output end two ends are parallel with piezo-resistance RY1 and filter circuit, described filter circuit comprises capacitor C 1, capacitor C 2 and capacitor C 3, after 2 series connection of described capacitor C 1 and capacitor C again with capacitor C 3 parallel connections.
The above-mentioned soft switch source of welding current of inversion full-bridge type drive circuit, wherein, described piezo-resistance RY1 is zinc oxide varistor.
The above-mentioned soft switch source of welding current of inversion full-bridge type drive circuit, wherein, be connected with Absorption Capacitance C5 between the source electrode of described the second inverter output and the 3rd IGBT pipe G3, be connected with Absorption Capacitance C6 between the drain electrode of described the second inverter output and the 4th IGBT pipe G4, described Absorption Capacitance C5, Absorption Capacitance C6, resonant inductance L2 form resonant circuit together with resonance capacitor C 7.
The above-mentioned soft switch source of welding current of inversion full-bridge type drive circuit, wherein, be in series with current sampling mutual inductor HG1 between described the first inverter output and the second inverter output, the primary coil number of turn of described current sampling mutual inductor HG1 and the ratio of the secondary coil number of turn are 150～250:1.
The above-mentioned soft switch source of welding current of inversion full-bridge type drive circuit, wherein, the primary coil number of turn of described current sampling mutual inductor HG1 and the ratio of the secondary coil number of turn are 200:1.
The above-mentioned soft switch source of welding current of inversion full-bridge type drive circuit, wherein, described main transformer T1 mono-road output loop and commutating inductance L1 are connected to form load circuit.
The above-mentioned soft switch source of welding current of inversion full-bridge type drive circuit, wherein, the switching pulse circuit that the grid of a described IGBT pipe G1, the 2nd IGBT pipe G2, the 3rd IGBT pipe G3 and the 4th IGBT pipe G4 is 20KHZ～40KHZ with frequency is connected.
The present invention contrasts prior art following beneficial effect: the soft switch source of welding current of inversion full-bridge type provided by the invention drive circuit, the two-tube IGBT module of two-way formed by four IGBT pipes replaces the single tube normal shock, thereby raising reverse frequency, and keep lower switching loss, meet the high accuracy of electric arc is controlled.
The accompanying drawing explanation
Fig. 1 is existing inversion single-ended forward type source of welding current driving circuit structure schematic diagram;
Fig. 2 is the soft switch source of welding current of inversion full-bridge type of the present invention driving circuit structure schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 2 is the soft switch source of welding current of inversion full-bridge type of the present invention driving circuit structure schematic diagram.
Refer to Fig. 1, the soft switch source of welding current of inversion full-bridge type provided by the invention drive circuit comprises rectifier bridge D1, IGBT module and main transformer T1, wherein, described IGBT module comprises an IGBT pipe G1, the 2nd IGBT pipe G2, the 3rd IGBT pipe G3 and the 4th IGBT pipe G4; The switching pulse circuit that the grid of a described IGBT pipe G1, the 2nd IGBT pipe G2, the 3rd IGBT pipe G3 and the 4th IGBT pipe G4 is 20KHZ～40KHZ with frequency is connected; The one IGBT pipe G1 and the 2nd IGBT pipe G2 can adopt an integrated two-tube High Speed I GBT module, and the 3rd IGBT pipe G3 and the 4th IGBT pipe G4 also can adopt an integrated two-tube High Speed I GBT module;
The drain electrode of a described IGBT pipe G1, the 3rd IGBT pipe G3 is connected with the cathode output end of rectifier bridge D1, the source electrode of described the 2nd IGBT pipe G2, the 4th IGBT pipe G4 is connected with the cathode output end of rectifier bridge D1, the drain electrode of the source electrode of a described IGBT pipe G1 and the 2nd IGBT pipe G2 is connected to form the first inverter output, and the drain electrode of the source electrode of described the 3rd IGBT pipe G3 and the 4th IGBT pipe G4 is connected to form the second inverter output;
After described the first inverter output, the second inverter output and resonance inductance L 2, resonant capacitance C7 series connection, with the input circuit of main transformer T1, be connected.
The soft switch source of welding current of inversion full-bridge type provided by the invention drive circuit, wherein, the cathode output end of described rectifier bridge D1, cathode output end two ends are parallel with piezo-resistance RY1 and filter circuit, described filter circuit comprises capacitor C 1, capacitor C 2 and capacitor C 3, after 2 series connection of described capacitor C 1 and capacitor C again with capacitor C 3 parallel connections.Be connected with Absorption Capacitance C5 between the source electrode of described the second inverter output and the 3rd IGBT pipe G3, be connected with Absorption Capacitance C6 between the drain electrode of described the second inverter output and the 4th IGBT pipe G4, described Absorption Capacitance C5, Absorption Capacitance C6, resonant inductance L2 form resonant circuit together with resonance capacitor C 7.Described piezo-resistance RY1 can select zinc oxide (ZnO) varistor.
The above-mentioned soft switch source of welding current of inversion full-bridge type drive circuit, be in series with current sampling mutual inductor HG1 between described the first inverter output and the second inverter output, the primary coil number of turn of described current sampling mutual inductor HG1 and the ratio of the secondary coil number of turn are 150～250:1, be preferably 200:1, specifically need to be selected according to side circuit.Described main transformer T1 has multichannel output, and wherein a road output loop and commutating inductance L1 are connected to form load circuit.
In sum, the soft switch source of welding current of inversion full-bridge type provided by the invention drive circuit, change conventional 40KHZ inversion single-ended forward type source of welding current circuit design, the two-tube IGBT module of two-way formed by four IGBT pipes replaces the single tube normal shock, thereby raising reverse frequency, and keep lower switching loss, meet the high accuracy of electric arc is controlled.Concrete advantage is as follows: 1, adopt advanced High Speed I GBT module to guarantee stable and reliable for performance; 2, adopt reasonably driving and resonant circuit parameters to guarantee that the IGBT module is operated in perfect condition, realize that 0 voltage, 0 electric current turn on and off.
Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little modification and perfect, so protection scope of the present invention is worked as with being as the criterion that claims were defined.
Claims (8)
1. the soft switch source of welding current of an inversion full-bridge type drive circuit, comprise rectifier bridge D1, IGBT module and main transformer T1, it is characterized in that, described IGBT module comprises an IGBT pipe G1, the 2nd IGBT pipe G2, the 3rd IGBT pipe G3 and the 4th IGBT pipe G4;
The drain electrode of a described IGBT pipe G1, the 3rd IGBT pipe G3 is connected with the cathode output end of rectifier bridge D1, the source electrode of described the 2nd IGBT pipe G2, the 4th IGBT pipe G4 is connected with the cathode output end of rectifier bridge D1, the drain electrode of the source electrode of a described IGBT pipe G1 and the 2nd IGBT pipe G2 is connected to form the first inverter output, and the drain electrode of the source electrode of described the 3rd IGBT pipe G3 and the 4th IGBT pipe G4 is connected to form the second inverter output;
After described the first inverter output, the second inverter output and resonance inductance L 2, resonant capacitance C7 series connection, with the input circuit of main transformer T1, be connected.
2. the soft switch source of welding current of inversion full-bridge type as claimed in claim 1 drive circuit, it is characterized in that, the cathode output end of described rectifier bridge D1, cathode output end two ends are parallel with piezo-resistance RY1 and filter circuit, described filter circuit comprises capacitor C 1, capacitor C 2 and capacitor C 3, after 2 series connection of described capacitor C 1 and capacitor C again with capacitor C 3 parallel connections.
3. the soft switch source of welding current of inversion full-bridge type as claimed in claim 1 drive circuit, is characterized in that, described piezo-resistance RY1 is zinc oxide varistor.
4. the soft switch source of welding current of inversion full-bridge type as claimed in claim 1 drive circuit, it is characterized in that, be connected with Absorption Capacitance C5 between the source electrode of described the second inverter output and the 3rd IGBT pipe G3, be connected with Absorption Capacitance C6 between the drain electrode of described the second inverter output and the 4th IGBT pipe G4, described Absorption Capacitance C5, Absorption Capacitance C6, resonant inductance L2 form resonant circuit together with resonance capacitor C 7.
5. the soft switch source of welding current of inversion full-bridge type as claimed in claim 1 drive circuit, it is characterized in that, be in series with current sampling mutual inductor HG1 between described the first inverter output and the second inverter output, the primary coil number of turn of described current sampling mutual inductor HG1 and the ratio of the secondary coil number of turn are 150～250:1.
6. the soft switch source of welding current of inversion full-bridge type as claimed in claim 5 drive circuit, is characterized in that, the primary coil number of turn of described current sampling mutual inductor HG1 and the ratio of the secondary coil number of turn are 200:1.
7. the soft switch source of welding current of inversion full-bridge type as claimed in claim 1 drive circuit, is characterized in that, described main transformer T1 mono-road output loop and commutating inductance L1 are connected to form load circuit.
8. the soft switch source of welding current of inversion full-bridge type as claimed in claim 1 drive circuit, it is characterized in that, the switching pulse circuit that the grid of a described IGBT pipe G1, the 2nd IGBT pipe G2, the 3rd IGBT pipe G3 and the 4th IGBT pipe G4 is 20KHZ～40KHZ with frequency is connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013104728206A CN103475254A (en) | 2013-10-11 | 2013-10-11 | Inverter full-bridge soft switching welding power supply drive circuit |
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| CN2013104728206A CN103475254A (en) | 2013-10-11 | 2013-10-11 | Inverter full-bridge soft switching welding power supply drive circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201198066Y (en) * | 2008-02-01 | 2009-02-25 | 北京工业大学 | Main circuit topological structure of inverter submerged arc welding power supply |
| CN201249324Y (en) * | 2008-08-28 | 2009-06-03 | 上海沪通焊接电器制造有限公司 | Inverted gas shielded welding machine |
| CN101898270A (en) * | 2010-08-12 | 2010-12-01 | 深圳市华意隆实业发展有限公司 | Inverter type alternative current medium frequency electric arc welding machine |
| CN102158089A (en) * | 2011-02-22 | 2011-08-17 | 深圳华意隆电气股份有限公司 | Power inverter and reactive absorption circuit of contravariant soft switching electric welder |
| CN203504395U (en) * | 2013-10-11 | 2014-03-26 | 上海沪工焊接集团股份有限公司 | Inverter welding power source driving circuit |
-
2013
- 2013-10-11 CN CN2013104728206A patent/CN103475254A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201198066Y (en) * | 2008-02-01 | 2009-02-25 | 北京工业大学 | Main circuit topological structure of inverter submerged arc welding power supply |
| CN201249324Y (en) * | 2008-08-28 | 2009-06-03 | 上海沪通焊接电器制造有限公司 | Inverted gas shielded welding machine |
| CN101898270A (en) * | 2010-08-12 | 2010-12-01 | 深圳市华意隆实业发展有限公司 | Inverter type alternative current medium frequency electric arc welding machine |
| CN102158089A (en) * | 2011-02-22 | 2011-08-17 | 深圳华意隆电气股份有限公司 | Power inverter and reactive absorption circuit of contravariant soft switching electric welder |
| CN203504395U (en) * | 2013-10-11 | 2014-03-26 | 上海沪工焊接集团股份有限公司 | Inverter welding power source driving circuit |
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Application publication date: 20131225 |