CN102794539A - Limited delay phase-shift full-bridge soft-switch inverter manual electric arc welder - Google Patents
Limited delay phase-shift full-bridge soft-switch inverter manual electric arc welder Download PDFInfo
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- CN102794539A CN102794539A CN2012103194921A CN201210319492A CN102794539A CN 102794539 A CN102794539 A CN 102794539A CN 2012103194921 A CN2012103194921 A CN 2012103194921A CN 201210319492 A CN201210319492 A CN 201210319492A CN 102794539 A CN102794539 A CN 102794539A
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Abstract
The invention discloses a limited delay phase-shift full-bridge soft-switch inverter manual electric arc welder. A main circuit of the limited delay phase-shift full-bridge soft-switch inverter manual electric arc welder comprises a full-bridge circuit composed of four power amplifier pipes IGBT (Insulated Gate Bipolar Transistor), wherein the full-bridge circuit comprises leading bridge arms Q1 and Q2 and lag bridge arms Q3 and Q4; capacitors C1 and C2 are respectively connected between source and drain electrodes of the leading bridge arms Q1 and Q2; a capacitor Cb is connected with a joint of the leading bridge arms Q1 and Q2; the capacitor Cb is serially connected with an inductor L1 and then is connected with one end of a primary coil of a main transformer T1; and the joint of the lag bridge arms Q3 and Q4 is connected with the other end of the primary coil of the main transformer T1. In the limited delay phase-shift full-bridge soft-switch inverter manual electric arc welder, a ZVS (Zero Voltage Switching) condition of the leading bridge arms Q1 and Q2 is created by the L2, C1 and C2, so as to switch on the leading bridge arms Q1 and Q2 under a linear zero voltage condition; a ZCS (Zero Current Switching) condition of the lag bridge arms Q3 and Q4 is created by the L1 and Cb, so as to switch off the lag bridge arms Q3 and Q4 under a zero current condition; and the L1 is a high-leading saturation reactance, so that the machine has an excellent and outstanding anti-sticking function.
Description
Technical field
The present invention relates to a kind of manual arc welding machine, be specifically related to a kind of limited delay transposition full-bridge soft-switching inversion manual arc welding machine.
Background technology
The electric welding machine of domestic market is main with the technology of positive activation type, semibridge system and full-bridge mainly at present, and these technology are mainly worked with the hard switching mode, and existing hard switching full-bridge circuit is as shown in Figure 1; Q1, Q2, Q3, Q4 are power tube IGBT in the full-bridge circuit; Q1, Q2 are called leading-bridge, and Q3, Q4 are called lagging leg, Q1, Q4 conducting simultaneously in the work; The transmission of energy has so just been accomplished in Q3, Q2 conducting simultaneously.Full-bridge circuit must be avoided the two pipe conductings simultaneously up and down of same brachium pontis at work, and conducting simultaneously will be fatal.Hard open circuit is exactly in order to solve the work problem of brachium pontis with the different of soft switch circuit; Make the work of circuit safety, stable, reliable and effective; Up and down two pipes can not conducting to make same brachium pontis; So just bring ZVS (ZVT) ZCS (Zero Current Switch) the ZVZCS notion of (zero-voltage and zero-current switch is called for short two zero switches), power tube work will be safe with this understanding.
But in the hard switching circuit, leading-bridge is realized the ZVS condition easily, but lagging leg will be difficult, in order to address this problem the technology that has just proposed soft switch.
Summary of the invention
The object of the invention is to provide a kind of limited delay transposition full-bridge soft-switching inversion manual arc welding machine, and it can realize zero-voltage and zero-current switch, improves stability, load factor and the anti-weldbonding performance etc. of product.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
A kind of limited delay transposition full-bridge soft-switching inversion manual arc welding machine; Comprise power supply, power protecting circuit, current rectifying and wave filtering circuit, main circuit, main transformer T1, output circuit, pwm control circuit and drive circuit; Power supply links to each other with power protecting circuit; The output current of power protecting circuit inserts main circuit after current rectifying and wave filtering circuit is handled; Main circuit links to each other with main transformer T1, and the other end of main transformer T1 links to each other with output circuit, and drive circuit links to each other with pwm control circuit; Described main circuit comprises the full-bridge circuit that four power tube IGBT form; Described full-bridge circuit comprises Q1, Q2 that forms leading-bridge and Q3, the Q4 that forms lagging leg, and the Q1 of composition leading-bridge, the source of Q2 are leaked between the two poles of the earth and linked to each other with capacitor C 1, C2 respectively, and the Q1 of composition leading-bridge, the junction of Q2 link to each other with capacitor C b; Capacitor C b links to each other with an end of the primary coil of main transformer T1 with inductance L 1 series connection back, and the Q3 of composition lagging leg, the junction of Q4 link to each other with the other end of the primary coil of main transformer T1.
As optimization; The Q3 of composition lagging leg, the junction of Q4 link to each other with an end of a transformer T2 primary coil; The other end of the primary coil of said transformer T2 inserts the other end of the primary coil of main transformer T1; The secondary coil of said transformer T2 inserts pwm control circuit and constitutes current feedback, is connected in parallel to inductance L 2 between the secondary coil of described main transformer T1.
As optimization, described pwm control circuit produces the needed drive waveforms of power tube of main circuit part.
Further, described pwm control circuit is provided with thermal protector outward, and described thermal protector links to each other with pwm control circuit, is used to protect pwm control circuit to prevent cause thermal damage.
With respect to scheme of the prior art, advantage of the present invention is:
In the limited delay transposition full-bridge soft-switching inversion manual arc welding machine described in the invention, L2, C1, C2 have created the ZVS condition of leading-bridge Q1, Q2, make under its linear zero voltage condition open-minded.L1, Cb have created the ZCS condition of lagging leg Q3, Q4, make under its zero current condition and turn-off, and L1 is that height is led saturation reactance, make machine have outstanding good antiseized function.The lead-lag brachium pontis all in soft switch condition work, has been realized ZVZCS (zero-voltage and zero-current switch).
And T2 is a current detecting, and it is operated in main circuit, can the instantaneous working condition that detects electric current fast; Simultaneously as current feedback; For the suitable attitude of the stable regulation of electric current changes condition is provided, reaches ideal situation, can detect the ZCS working condition of lagging leg simultaneously through it.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Fig. 1 is the structural principle block diagram of existing hard switching full-bridge circuit;
Fig. 2 is the structural principle block diagram of the embodiment of the invention;
Fig. 3 is the same brachium pontis waveform of two pipes up and down in the embodiment of the invention;
Fig. 4 is the waveform that conducting simultaneously two is managed between different brachium pontis in the embodiment of the invention
The specific embodiment
Below in conjunction with specific embodiment such scheme is further specified.Should be understood that these embodiment are used to the present invention is described and are not limited to limit scope of the present invention.The implementation condition that adopts among the embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in the normal experiment.
Embodiment:
Present embodiment has been described a kind of limited delay transposition full-bridge soft-switching inversion manual arc welding machine; Comprise 230V power supply, power protecting circuit, current rectifying and wave filtering circuit, main circuit, main transformer T1, output circuit, pwm control circuit and drive circuit; Power supply links to each other with power protecting circuit; The output current of power protecting circuit inserts main circuit after current rectifying and wave filtering circuit is handled; Main circuit links to each other with main transformer T1, and the other end of main transformer T1 links to each other with output circuit, and drive circuit links to each other with pwm control circuit; Described main circuit comprises the full-bridge circuit that four power tube IGBT form; Described full-bridge circuit comprises Q1, Q2 that forms leading-bridge and Q3, the Q4 that forms lagging leg, and the Q1 of composition leading-bridge, the source of Q2 are leaked between the two poles of the earth and linked to each other with capacitor C 1, C2 respectively, and the Q1 of composition leading-bridge, the junction of Q2 link to each other with capacitor C b; Capacitor C b links to each other with an end of the primary coil of main transformer T1 with inductance L 1 series connection back, and the Q3 of composition lagging leg, the junction of Q4 link to each other with the other end of the primary coil of main transformer T1.
The Q3 of composition lagging leg, the junction of Q4 link to each other with an end of a transformer T2 primary coil; The other end of the primary coil of said transformer T2 inserts the other end of the primary coil of main transformer T1; The secondary coil of said transformer T2 inserts pwm control circuit and constitutes current feedback, is connected in parallel to inductance L 2 between the secondary coil of described main transformer T1.
Described pwm control circuit produces the needed drive waveforms of power tube of main circuit part.Described pwm control circuit is provided with thermal protector outward, and described thermal protector links to each other with pwm control circuit, is used to protect pwm control circuit to prevent cause thermal damage.
L2, C1, C2 have created the ZVS condition of leading-bridge Q1, Q2, make under its linear zero voltage condition open-mindedly, and concrete parameter is: inductance L 2 is selected UY type ferrite magnetic core (60/30/16) plastic coated wire coiling for use, inductance parameters is 100uH; C1, C2 adopt CBB81/1600V electric capacity.
L1, Cb have created the ZCS condition of lagging leg Q3, Q4, make under its zero current condition and turn-off, and L1 selects for use high lead ring sections to support body magnetic core (H49/32/19), and enamel covered wire is around 5 circles, and Cb adopts CBB20 electric capacity 2.0uf/1200V.
So, the lead-lag brachium pontis is all in the work of soft switch condition, Here it is ZVZCS (two zero switch).T2 is a current detecting, and it is operated in main circuit, can the instantaneous working condition that detects electric current fast; Simultaneously as current feedback; For the suitable attitude of the stable regulation of electric current changes condition is provided, reaches ideal situation, can detect the ZCS working condition of lagging leg simultaneously through it.
Fig. 3, waveform shown in Figure 4 by pwm control circuit produced the needed drive waveforms of main circuit power tube, shown in waveform all be in 0 line above for the forward position upwarp apart from the shape square wave, amplitude is+15V; And also there is the losing side ripple simultaneously in the traditional driving waveform, promptly ± 15V perhaps-10V/+15V.Fig. 3 is the same brachium pontis waveform of two pipes up and down, and phase place is opposite and certain dead band is arranged, and guarantees two not conductings simultaneously of pipe up and down; Fig. 4 is the waveform of two pipes of conducting simultaneously between different brachium pontis, clearly has certain phase delay, and the front is that leading arm is the waveform of lagging leg at the back, and this has just realized limited phase delay.
Above-mentioned instance only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalent transformations that spirit is done according to the present invention or modification all should be encompassed within protection scope of the present invention.
Claims (4)
1. limited delay transposition full-bridge soft-switching inversion manual arc welding machine; Comprise power supply, power protecting circuit, current rectifying and wave filtering circuit, main circuit, main transformer T1, output circuit, pwm control circuit and drive circuit; Power supply links to each other with power protecting circuit; The output current of power protecting circuit inserts main circuit after current rectifying and wave filtering circuit is handled, main circuit links to each other with main transformer T1, and the other end of main transformer T1 links to each other with output circuit; Drive circuit links to each other with pwm control circuit; It is characterized in that described main circuit comprises the full-bridge circuit that four power tube IGBT form, described full-bridge circuit comprises Q1, Q2 that forms leading-bridge and Q3, the Q4 that forms lagging leg; The Q1 of composition leading-bridge, the source of Q2 are leaked between the two poles of the earth and are linked to each other with capacitor C 1, C2 respectively; The Q1 of composition leading-bridge, the junction of Q2 link to each other with capacitor C b, and capacitor C b links to each other with an end of the primary coil of main transformer T1 with inductance L 1 series connection back, and the Q3 of composition lagging leg, the junction of Q4 link to each other with the other end of the primary coil of main transformer T1.
2. limited delay transposition full-bridge soft-switching inversion manual arc welding machine according to claim 1; It is characterized in that; The Q3 of composition lagging leg, the junction of Q4 link to each other with an end of a transformer T2 primary coil; The other end of the primary coil of said transformer T2 inserts the other end of the primary coil of main transformer T1, and the secondary coil of said transformer T2 inserts pwm control circuit and constitutes current feedback, is connected in parallel to inductance L 2 between the secondary coil of described main transformer T1.
3. limited delay transposition full-bridge soft-switching inversion manual arc welding machine according to claim 1 is characterized in that described pwm control circuit produces the needed drive waveforms of power tube of main circuit part.
4. limited delay transposition full-bridge soft-switching inversion manual arc welding machine according to claim 1; It is characterized in that; Described pwm control circuit is provided with thermal protector outward, and described thermal protector links to each other with pwm control circuit, is used to protect pwm control circuit to prevent cause thermal damage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103194921A CN102794539A (en) | 2012-08-31 | 2012-08-31 | Limited delay phase-shift full-bridge soft-switch inverter manual electric arc welder |
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| CN2012103194921A CN102794539A (en) | 2012-08-31 | 2012-08-31 | Limited delay phase-shift full-bridge soft-switch inverter manual electric arc welder |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100275667B1 (en) * | 1998-05-29 | 2000-12-15 | 이현수 | Power supply for arc welding using partial resonant soft switching |
| CN1557597A (en) * | 2004-01-15 | 2004-12-29 | 沈阳工业大学 | Multifunctional integrated welding and cutting equipment |
| CN201039013Y (en) * | 2007-05-17 | 2008-03-19 | 徐爱平 | Reverse conversion soft switch device |
| CN201239844Y (en) * | 2008-04-23 | 2009-05-20 | 蒋仲湘 | Novel soft switch inversion type carbon dioxide gas protecting welder |
| CN101618472A (en) * | 2009-08-06 | 2010-01-06 | 唐山松下产业机器有限公司 | Soft switch inversion electric welding machine |
| CN201889572U (en) * | 2010-12-07 | 2011-07-06 | 上海瑞凌电器有限公司 | Single-tube IGBT inversion electric-arc welding machine |
| CN202894541U (en) * | 2012-08-31 | 2013-04-24 | 苏州市双马机电有限公司 | Limited delay transposing full-bridge soft switching inversion manual electric arc welder |
-
2012
- 2012-08-31 CN CN2012103194921A patent/CN102794539A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100275667B1 (en) * | 1998-05-29 | 2000-12-15 | 이현수 | Power supply for arc welding using partial resonant soft switching |
| CN1557597A (en) * | 2004-01-15 | 2004-12-29 | 沈阳工业大学 | Multifunctional integrated welding and cutting equipment |
| CN201039013Y (en) * | 2007-05-17 | 2008-03-19 | 徐爱平 | Reverse conversion soft switch device |
| CN201239844Y (en) * | 2008-04-23 | 2009-05-20 | 蒋仲湘 | Novel soft switch inversion type carbon dioxide gas protecting welder |
| CN101618472A (en) * | 2009-08-06 | 2010-01-06 | 唐山松下产业机器有限公司 | Soft switch inversion electric welding machine |
| CN201889572U (en) * | 2010-12-07 | 2011-07-06 | 上海瑞凌电器有限公司 | Single-tube IGBT inversion electric-arc welding machine |
| CN202894541U (en) * | 2012-08-31 | 2013-04-24 | 苏州市双马机电有限公司 | Limited delay transposing full-bridge soft switching inversion manual electric arc welder |
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Application publication date: 20121128 |