CN102136804A - Novel Z source welding power source system - Google Patents
Novel Z source welding power source system Download PDFInfo
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- CN102136804A CN102136804A CN2011101033329A CN201110103332A CN102136804A CN 102136804 A CN102136804 A CN 102136804A CN 2011101033329 A CN2011101033329 A CN 2011101033329A CN 201110103332 A CN201110103332 A CN 201110103332A CN 102136804 A CN102136804 A CN 102136804A
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Abstract
The invention relates to the technical field of welding power sources, and in particular relates to a novel Z source welding power source system. The novel Z source welding power source system comprises a main circuit, a power supply main control and man-machine interface board and an IGBT (insulated gate bipolar transistor) driving circuit, wherein the IGBT driving circuit is respectively connected with the main circuit and the power supply main control and man-machine interface board, and the main circuit comprises a Z source network. The invention has the beneficial effects that the influence of dead zone effect to an inverter can be eliminated, the resistance of a welding machine to EMI (electromagnetic interference) noise can be enhanced, and the welding machine can not be damaged owning to false triggering of an inverter bridge leg.
Description
Technical field
The present invention relates to source of welding current technical field, specifically, relate to a kind of novel Z source welding power source system.
Background technology
At present, the main circuit topological main circuit structures that adopt simple full-bridge inverting at China's inversion welding source more, it belongs to voltage source inverter, this inverter is a kind of buck inverter, the input direct voltage output AC voltage, according to the difference of application scenario, output voltage amplitude or frequency can be constant.Adopt the application of voltage source inverter quite extensive in the inversion welding source, but have conceptive and theoretic deficiency and limitation; Its AC load can only be inductive or necessary series reactor, to guarantee that voltage source inverter can operate as normal.In addition, upper and lower two device for power switching of each brachium pontis of this voltage source inverter can not shoot through.No matter be because the anti-EMI noise of system itself is poor, when still artificially causing upper and lower two device for power switching to lead directly to intentionally for it, device is damaged in the capital, causes the collapse of system, so this limitation of system itself existence and influenced the reliability of welding machine.
Summary of the invention
The objective of the invention is deficiency and limitation, a kind of novel Z source welding power source system is provided at the voltage source inverter existence of existing inverter type welder employing.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of novel Z source welding power source system, comprise: the main circuit of Xiang Lianing, power supply master control and human-machine interface oralia successively, and the IGBT drive circuit, described IGBT drive circuit links to each other with power supply master control and interface card with main circuit respectively, and described main circuit comprises the Z source network.
Wherein, the corresponding above-mentioned Z source network of described power supply master control and human-machine interface oralia is provided with Z source network voltage control circuit.
Wherein, described main circuit is connected to form successively by input rectifying module, input filtration module, straight-through blocking-up module, described Z source network, IGBT inversion module, high frequency transformer, output rectification module and output filtration module, described input rectifying module is connected with three-phase alternating-current supply, and described output filtration module connects load.
Wherein, described power supply master control and interface card comprise: basic power supply circuits, blocking-up control circuit, primary current sample circuit, output current/voltage sampling circuit, signal conditioning circuit, PWM output module, man-machine interface circuit.
Wherein, described IGBT drive circuit comprises: the 4 tunnel isolate+drive circuit that 24V DC power supply, 4 route optocouplers are formed, an end of described IGBT drive circuit links to each other with described PWM output module, the other end links to each other with described IGBT full-bridge inverting module.
Compared with prior art, the invention has the beneficial effects as follows:
This welding power source system is by introducing the Z source network, inverter and DC power supply are coupled, different with traditional inverter based on voltage source, the operating state of its inverter bridge is except having effective conducting and nought state, also there is upper and lower pipe pass-through state, eliminate the influence of dead time effect, strengthen the ability of the anti-EMI noise of welding machine, guarantee that the welder power switching device can not damaged because of the false triggering of inverter bridge leg inverter.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is a novel Z of the present invention source welding power source system block diagram;
Fig. 2 is the embodiment structural representation of novel Z of the present invention source welding system main circuit;
Fig. 3 is that system of the present invention inverter bridge is when straight-through, from the Z source equivalent electric circuit that DC side is seen into;
Fig. 4 is the novel Z of a present invention source welding system closed-loop control strategy.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, novel Z source welding power source system comprises that main circuit, power supply master control and interface card, IGBT drive plate three parts form.Main circuit is connected to form successively by input rectifying module, input filtration module, Z source network, IGBT inversion module, high frequency transformer, output rectification module and output filtration module, the input rectifying module is connected with three-phase alternating-current supply, and the output filtration module is connected with load; The basic power supply circuits of power supply master control borad main circuit plate, Z source network voltage control circuit, primary current sample circuit, output current/voltage sampling circuit, signal conditioning circuit, man-machine interface circuit etc.; The IGBT drive circuit mainly comprises the drive circuit that 4 tunnel isolation+24V DC power supply, 4 route optocoupler TLP250 form etc.
Operation principle:
For guaranteeing this welding power source system stability, for weld load provides high-quality stable electric energy output, the double closed-loop control system that system adopts current inner loop and outer voltage to combine.The primary current sample circuit is delivered to power supply master control and human-machine interface oralia by instrument transformer (or current Hall transducer) with high frequency transformer primary current detection signal, output current/voltage sampling circuit is gathered welding machine output current/voltage signal by the current/voltage Hall element and is sent power supply master control and human-machine interface oralia, signal conditioning circuit is according to the electric current that collects, the setting of voltage signal and welding machine, finish the corresponding closed-loop control algolithm, produce the PWM waveform, the duty ratio of the IGBT power model in IGBT drive circuit control soft-switching inversion main circuit, and finally realize desired generator characteristic output.
As shown in Figure 2, the main circuit topological structure of novel Z source welding power source system.The switching signal of switching tube VS5 is got by the through connect signal negate of inverter bridge.The effect of VS5 and C3 be make the input voltage Upn of inverter bridge non-straight-through between in do not occur falling, and make Upn the constantly soaring of voltage when this welding system zero load or underloading, not occur.As shown in Figure 3, when inverter bridge is in when straight-through, from the Z source equivalent electric circuit that DC side is seen into, promptly switching tube VS5 is in blocking state.V is arranged this moment
L=V
C, V
d=V
C+ V
L=2V
C＞Vo, V
i=0; Capacitor discharge releases energy, and inductance is by the electric capacity energy storage of charging; The electric current of power device in the inverter bridge leg can be risen is controlled within its scope that can bear, thereby is unlikely to damage the inverse switch pipe.
As shown in Figure 4, novel Z source welding power source system closed-loop control block diagram, when non-pass-through state was worked, welding power source system was by adopting two closed-loop controls of current inner loop, outer voltage.Value after the given signal of primary current feedback signal and if electric current compares is regulated the signal K2 (If-Iref) that exports through the transfer function K2 of pi regulator (s); Value after output voltage signal Uf and voltage given signal compare is regulated the signal K1 (Uf-Uref) that exports through the K1 of pi regulator (s); Signal K4K3[K2 (If-Iref)+K1 (Uf-Uref) that two conditioning signals obtain through the output of K3 (s), K4 (s) transfer function respectively] as the control signal of PWM, by suitable transfer function and the parameter thereof of adjusting, thereby just can obtain stability, the good pwm signal of followability guarantees this welding power source system inverter bridge operate as normal under non-pass-through state.
The of the present invention proposition first in the middle of the Z source network introducing inverter type welder, make the power switch pipe of inverter type welder can be operated under the straight-through state of upper and lower pipe, eliminate the dead time effect of conventional inverter type welder, improved the fail safe of power switch pipe work in the inverter type welder and the reliability of welding machine complete machine greatly.
The present invention is not limited to above-mentioned execution mode, if various changes of the present invention or distortion are not broken away from the spirit and scope of the present invention, if these changes and distortion belong within claim of the present invention and the equivalent technologies scope, then the present invention also is intended to comprise these changes and distortion.
Claims (5)
1. novel Z source welding power source system, it is characterized in that, comprising: the main circuit of Xiang Lianing, power supply master control and human-machine interface oralia successively, and IGBT drive circuit, described IGBT drive circuit links to each other with power supply master control and interface card with main circuit respectively, and described main circuit comprises the Z source network.
2. novel Z as claimed in claim 1 source welding power source system is characterized in that, the corresponding above-mentioned Z source network of described power supply master control and human-machine interface oralia is provided with Z source network voltage control circuit.
3. novel Z as claimed in claim 1 source welding power source system, it is characterized in that, described main circuit is connected to form successively by input rectifying module, input filtration module, straight-through blocking-up module, described Z source network, IGBT inversion module, high frequency transformer, output rectification module and output filtration module, described input rectifying module is connected with three-phase alternating-current supply, and described output filtration module connects load.
4. novel Z as claimed in claim 1 source welding power source system, it is characterized in that described power supply master control and interface card comprise: basic power supply circuits, blocking-up control circuit, primary current sample circuit, output current/voltage sampling circuit, signal conditioning circuit, PWM output module, man-machine interface circuit.
5. novel Z as claimed in claim 1 source welding power source system, it is characterized in that, described IGBT drive circuit comprises: the 4 tunnel isolate+drive circuit that 24V DC power supply, 4 route optocouplers are formed, one end of described IGBT drive circuit links to each other with described PWM output module, and the other end links to each other with described IGBT full-bridge inverting module.
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| CN2011101033329A CN102136804A (en) | 2011-04-25 | 2011-04-25 | Novel Z source welding power source system |
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| CN2011101033329A CN102136804A (en) | 2011-04-25 | 2011-04-25 | Novel Z source welding power source system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890217A (en) * | 2012-10-24 | 2013-01-23 | 嘉兴清源电气科技有限公司 | Universal experimental device based on Z-source inverter |
| CN103817429A (en) * | 2013-03-07 | 2014-05-28 | 安徽易特流焊割发展有限公司 | Intelligent direct current inverter type steel bar electroslag pressure welder |
| CN104242666A (en) * | 2014-10-21 | 2014-12-24 | 武汉力成伟业科技有限公司 | Novel inverter welding power supply |
| CN105099217A (en) * | 2014-05-20 | 2015-11-25 | 北京Abb电气传动系统有限公司 | Cascade-type multi-level high-voltage frequency converter |
| CN106394302A (en) * | 2016-11-18 | 2017-02-15 | 四川创汇智能电力科技有限公司 | Vehicle-mounted charger based on quasi-Z-source conversion |
| CN108429469A (en) * | 2018-02-09 | 2018-08-21 | 东北电力大学 | The sources Z dual stage matrix converter modulator approach based on Carrier-based PWM |
| CN109698629A (en) * | 2019-01-07 | 2019-04-30 | 上海奥令科电子科技有限公司 | A kind of high-power DC power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1234306A (en) * | 1999-04-02 | 1999-11-10 | 北京工业大学 | Fuzzy control method for cooperating type CO2 welding circuit-shorting transition and welding machine thereof |
| JP2008067502A (en) * | 2006-09-07 | 2008-03-21 | Honda Motor Co Ltd | Inverter device and inverter device control method |
| CN101599710A (en) * | 2009-07-24 | 2009-12-09 | 南京航空航天大学 | Monopole inverter capable of boosting voltage |
-
2011
- 2011-04-25 CN CN2011101033329A patent/CN102136804A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1234306A (en) * | 1999-04-02 | 1999-11-10 | 北京工业大学 | Fuzzy control method for cooperating type CO2 welding circuit-shorting transition and welding machine thereof |
| JP2008067502A (en) * | 2006-09-07 | 2008-03-21 | Honda Motor Co Ltd | Inverter device and inverter device control method |
| CN101599710A (en) * | 2009-07-24 | 2009-12-09 | 南京航空航天大学 | Monopole inverter capable of boosting voltage |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890217A (en) * | 2012-10-24 | 2013-01-23 | 嘉兴清源电气科技有限公司 | Universal experimental device based on Z-source inverter |
| CN102890217B (en) * | 2012-10-24 | 2015-06-03 | 嘉兴清源电气科技有限公司 | Universal experimental device based on Z-source inverter |
| CN103817429A (en) * | 2013-03-07 | 2014-05-28 | 安徽易特流焊割发展有限公司 | Intelligent direct current inverter type steel bar electroslag pressure welder |
| CN105099217A (en) * | 2014-05-20 | 2015-11-25 | 北京Abb电气传动系统有限公司 | Cascade-type multi-level high-voltage frequency converter |
| CN104242666A (en) * | 2014-10-21 | 2014-12-24 | 武汉力成伟业科技有限公司 | Novel inverter welding power supply |
| CN106394302A (en) * | 2016-11-18 | 2017-02-15 | 四川创汇智能电力科技有限公司 | Vehicle-mounted charger based on quasi-Z-source conversion |
| CN108429469A (en) * | 2018-02-09 | 2018-08-21 | 东北电力大学 | The sources Z dual stage matrix converter modulator approach based on Carrier-based PWM |
| CN109698629A (en) * | 2019-01-07 | 2019-04-30 | 上海奥令科电子科技有限公司 | A kind of high-power DC power supply |
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Application publication date: 20110727 |