CN203526771U - Inverse alternating-current waveform control circuit for use in submerged arc welding - Google Patents
Inverse alternating-current waveform control circuit for use in submerged arc welding Download PDFInfo
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- CN203526771U CN203526771U CN201320685905.8U CN201320685905U CN203526771U CN 203526771 U CN203526771 U CN 203526771U CN 201320685905 U CN201320685905 U CN 201320685905U CN 203526771 U CN203526771 U CN 203526771U
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses an inverse alternating-current waveform control circuit for use in submerged arc welding, belonging to a welding control circuit. The waveform control circuit comprises a primary inversion unit and a secondary inversion unit, wherein the primary inversion unit is connected to a power supply input end, and is connected to a power supply output end together with the secondary inversion unit. In the circuit, the 380V standard voltage of an alternating-current power supply is inversed twice and output as a welding power supply after being converted into high-voltage direct current, and the inversion units in the circuit are controlled by the waveform control circuit specific to a current alternating-current waveform control signal, thereby transmitting a given signal to a host machine by a submerged arc welding trolley is converted into an alternating-current waveform control signal which is independently adjustable in amplitude, duty ratio and frequency through a singlechip and a relevant control circuit, and alternating-current waveform control welding is realized. Moreover, a waveform control signal between an embedded module in the alternating-current waveform control circuit and the submerged arc welding trolley needs to be modulated and demodulated, thereby increasing the antijamming capability of the inversion circuit in real-time waveform control.
Description
Technical field
The utility model relates to a kind of welding control circuit, and in particular, the utility model relates generally to a kind of inversion waves AC control circuit for submerged-arc welding.
Background technology
Welding is a kind of important process for machining and manufacturing that has long history, because it has advantages of that other methods of attachment are incomparable, and that submerged-arc welding is automaticity is higher, production efficiency is high, appearance of weld good, without a kind of welding equipment of arc light radiation, be widely used in the thick plates in the fields such as bridge, boiler, shipbuilding, petrochemical industry, ocean engineering, nuclear industry.Traditional ac square wave submerged arc welding electric power is to take current-limiting reactor formula arc welding transformer and IGCT reactor formula Arc Welding Power as main, and its parameter adjustable range is narrow, and output frequency is single, belongs to the high energy consumption product that country forbids.The appearance of inversion transformation technique has promoted the develop rapidly of source of welding current technology, and the diversity of control and flexibility are that traditional welding machine is incomparable.Alternating current-direct current (AC/DC) square wave inversion submerged arc welding adopts novel high-power IGBT switching device, nanometer magnetic core, pulse width modulator, DC inverter after the three-phase alternating current rectification of power frequency (50Hz) is become to 20KHz high frequency low voltage alternating current, then after the rectification of MOSFET module, carry out secondary inverting and become 10-100Hz alternating current, there is current waveform and regulate easily (frequency, dutycycle, positive-negative half-cycle amplitude all can independently regulate), parameter that feature many, that welding procedure practicality is wide is set.
At present, the ripple control submerged arc welding electric power system that domestic few producer releases, welding Waveform Control is mainly that electric power host controller completes, main frame is connected with DC analogue quantity or digital quantity with the control signal between welding tractor, line complexity between the two, poor anti jamming capability, fault rate be higher, it is loaded down with trivial details to keep in repair, greatly hindered applying of this series products, be therefore necessary to do further improvement and research for the ripple control techniques for submerged arc welding electric power.
Utility model content
One of the purpose of this utility model is for above-mentioned deficiency, a kind of inversion waves AC control circuit for submerged-arc welding is provided, the welding Waveform Control that solves submerged-arc welding in prior art with expectation is mainly to rely on electric power host controller to complete, cause line complexity between main frame and submerged arc welding carriage, poor anti jamming capability, and fault rate high-technology problem.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
A kind of inversion waves AC control circuit for submerged-arc welding provided by the utility model, described ripple control circuit comprises inversion unit and secondary inverting unit, described inversion unit access power input, and jointly access power output end with secondary inverting unit, wherein:
In a described inversion unit, being at least provided with two IGBT parallel with one another and access power input manages, described two IGBT pipes access respectively transformer separately, for from transformer, the hf and hv pulse voltage after the inversion of IGBT pipe being become to high frequency low voltage pulse voltage and rectification is direct current, and transfer to respectively power output end and secondary inverting unit; In described secondary inverting unit, be at least provided with two secondary IGBT pipes parallel with one another, after described two secondary IGBT pipe is in parallel, be connected with the low-voltage direct loop after an inversion unit rectification, and access respectively two transformers by the first rectifier bridge separately, and described two secondary IGBT pipe also accesses the power output end of ripple control circuit simultaneously, for exporting in the lump the source of welding current after inversion with an inversion unit; In described ripple control circuit, also comprise embedded type control module, described embedded type control module accesses respectively two secondary IGBT pipes, and also by two PWM drive circuits of CC/CV Characteristics Control module access, described two PWM drive circuits access respectively two IGBT pipes, for by embedded type control module, an IGBT pipe being controlled with secondary IGBT pipe, positive-negative half-cycle amplitude, frequency and the pulse duty factor of its inverter current are carried out to independent adjusting.
As preferably, further technical scheme is: described embedded type control module also accesses the waveform control circuit of submerged arc welding carriage, for by coming from the waves AC control signal of submerged arc welding carriage, an inversion unit is implemented to control with an IGBT pipe in secondary inverting unit with secondary IGBT pipe.
Inversion waves AC control circuit for submerged-arc welding according to claim 1 and 2, it is characterized in that: two IGBT pipes in a described inversion unit access respectively the power input of ripple control circuit by the second rectifier bridge separately, for the direct current that is 540V by the 380V AC rectification of power input by the second rectifier bridge.
Further technical scheme is: described PWM drive circuit also accesses separately between the IGBT pipe and transformer connecting, for carrying out peak value sampling.
Further technical scheme is: between described two IGBT pipe and the second rectifier bridge separately, be also parallel with respectively electric capacity.
Further technical scheme is: described transformer is nano magnetic core transformer.
Further technical scheme is: described embedded type control module also accesses respectively the low-voltage direct loop after inversion unit rectification one time, for positive half cycle and negative half period to electric power outputting current, samples.
Further technical scheme is: described embedded type control module is also connected with the power output end of two secondary IGBT pipe access in secondary inverting unit, for carrying out output voltage sampling.
Compared with prior art, one of the beneficial effects of the utility model are: in circuit, the 380V normal voltage of AC power, after being converted into high voltage direct current, is re-used as source of welding current output through twice inversion, and feed back current required waves AC control signal to ripple control circuit by the control system of submerged arc welding carriage, by ripple control circuit, for current waves AC control signal, the inversion unit in circuit is controlled, thereby submerged arc welding carriage is become to amplitude to the given signal of main frame by single-chip microcomputer and relevant control circuit, dutycycle, the waves AC control signal that frequency all can independently regulate, realize waves AC control welding, and the flush bonding module in waves AC control circuit and the waves AC control signal between submerged arc welding carriage need carry out modulation and demodulation, increased the antijamming capability of inverter circuit when real-time waveform is controlled, between submerged arc welding carriage and main frame, wiring is simple, a kind of inversion waves AC control circuit for submerged-arc welding provided by the utility model is simple in structure simultaneously, the more suitable power circuit as main frame in waves AC control submerged-arc welding system, range of application is wide.
Accompanying drawing explanation
Fig. 1 is for the electrical block diagram of an embodiment of the utility model is described;
Fig. 2 is for the circuit control functional block diagram of another embodiment of the utility model is described;
Fig. 3 is for the circuit diagram of the utility model Another application example is described;
In figure, 1 be inversion unit, 2 for secondary inverting unit, 3 for transformer, 4 be that the first rectifier bridge, 5 is the second rectifier bridge.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further elaborated.
Shown in figure 1, an embodiment of the present utility model is a kind of inversion waves AC control circuit for submerged-arc welding, this ripple control circuit comprises inversion unit 1 and secondary inverting unit 2, a described inversion unit 1 access power input, and jointly access power output end with secondary inverting unit 2, form the both positive and negative polarity of welding input power, specifically composed as follows:
In an above-mentioned inversion unit 1, being at least provided with two IGBT parallel with one another and access power input manages, and two IGBT pipes access respectively transformer 3 separately, its effect is from transformer 3, the hf and hv pulse voltage after the inversion of IGBT pipe to be become to high frequency low voltage pulse voltage and rectification is direct current, and transfers to respectively power output end and secondary inverting unit 2;
In above-mentioned secondary inverting unit 2, be at least provided with two secondary IGBT pipes parallel with one another, after described two secondary IGBT pipe is in parallel, be connected with the low-voltage direct loop after an inversion unit rectification, and access respectively two transformers 3 by the first rectifier bridge 4 separately, and described two secondary IGBT pipe also accesses the power output end of ripple control circuit simultaneously, and its effect is exported the source of welding current after inversion in the lump with an inversion unit 1;
Shown in Fig. 2, in described ripple control circuit, also comprise embedded type control module, described embedded type control module accesses respectively two secondary IGBT pipes, and also by two PWM drive circuits of CC/CV Characteristics Control module access, described two PWM drive circuits access respectively two IGBT pipes, for an IGBT pipe being controlled with secondary IGBT pipe by embedded type control module, positive-negative half-cycle amplitude to its inverter current, frequency and pulse duty factor are carried out independent adjusting, distinguish direct or indirect two IGBT pipes are managed and exported inverter control signal with secondary IGBT.
The IGBT that mentioned is in the present embodiment, the english abbreviation of insulated gate bipolar transistor (Insulated Gate Bipolar Transistor); And the preferential nano magnetic core transformer that adopts of above-mentioned transformer 3.
Go out as shown in Figure 2, in another embodiment of the present utility model, for making the power supply ripple control circuit output welding waveform corresponding with submerged arc welding carriage, above-mentioned embedded type control module preferably accesses the waveform control circuit of submerged arc welding carriage, be that its effect is by coming from the waves AC control signal of submerged arc welding carriage, an inversion unit 1 is implemented to control with secondary IGBT pipe with an IGBT pipe in secondary inverting unit 2.
Further, two IGBT pipes in an above-mentioned inversion unit 1 access respectively the power input of ripple control circuits by the second rectifier bridge 5 separately, for the direct current that is 540V by the 380V AC rectification of power input by the second rectifier bridge 5.Preferably, between above-mentioned two IGBT pipe and the second rectifier bridge 5 separately, be also parallel with respectively electric capacity.
The man-machine interactive system of the control cabinet of above-mentioned submerged arc welding carriage coordinates the given signal of output with main frame, submerged-arc welding out-put supply is carried out to ripple control, and trolley control system changes the information such as the set forward and reverse amplitude of voltage, electric current of operator, frequency, dutycycle into ripple control signal as the given signal of main frame.
In use procedure, it is the DC voltage of 540V that 380V three-phase alternating voltage divides the two-way three-phase commutation bridge rectification of respectively hanging oneself, and enters the soft switch of inverter welding machine system that independent IGBT forms separately after capacitor filtering again, realizes no-voltage and zero-current switching, reduce switching loss, the heating of effectively reduction system; By controlling the break-make of IGBT, produce high-frequency pulse voltage, after resonant inductance and resonant capacitance, enter nano magnetic core transformer 3, the high-frequency pulse voltage of 20KHZ is become to high frequency low voltage pulse voltage, the bridge rectifier forming through diode again, rectification is positive and negative two-way low-voltage DC, and two-way low-voltage DC positive pole and negative pole are delivered to the secondary inverter circuit output that two secondary IGBT pipes form after parallel connection respectively.By the control to two secondary IGBT pipes, can realize straight polarity direct current weldering, DC reverse connection weldering, ac square wave weldering etc., wherein can carry out independent adjusting to its positive-negative half-cycle amplitude, frequency and pulse duty factor during AC welding, meet different welding process requirement.
An embodiment who is more preferably for technical solution problem at the utility model, for making flush bonding module obtain more power information in ripple control circuit, preferably said PWM drive circuit is accessed again separately between the IGBT pipe and transformer 3 connecting, for carrying out peak value sampling; Above-mentioned embedded type control module is also accessed respectively to the low-voltage direct loop after inversion unit rectification one time, for positive half cycle and negative half period to electric power outputting current, sample.Above-mentioned embedded type control module is also connected with the power output end of two secondary IGBT pipes access, for carrying out output voltage sampling.
Shown in figure 3, in actual applications, engine control system, by reverser U5-1, follower U5-2, is picked up the compositions such as ripple diode D1, D2 and light lotus root U3, U4 to the above-mentioned preferred embodiment of the utility model.From the given waves AC control signal Vg1 of trolley control system after reverser U5-1, follower U5-2.Export separately square wave positive signal, export given signal Vg2 after picking up ripple diode D1, D2, this given signal goes to control the output size of an inversion; Given waves AC control signal Vg1 obtains the pulse signal of forward and reverse waveform through reverser U5-1, follower U5-2 rear drive light lotus root U3, U4, this signal removes to drive secondary inverting MOSFET power model again, changes main frame output polarity.Thereby make main frame output and given signal on all four waves AC control voltage or electric current.
" embodiment " that spoken of in this manual, " another embodiment ", " embodiment ", etc., refer to specific features, structure or the feature in conjunction with this embodiment, described and be included at least one embodiment that the application's generality describes.In description, a plurality of local appearance statement of the same race is not necessarily to refer to same embodiment.Furthermore, while describing a specific features, structure or feature in conjunction with arbitrary embodiment, what advocate is in conjunction with other embodiment, to realize this feature, structure or feature also to drop in scope of the present utility model.
Although the utility model is described with reference to a plurality of explanatory embodiment of the present utility model here, but, should be appreciated that, those skilled in the art can design a lot of other modification and embodiments, and these are revised and within embodiment will drop on the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to the building block of subject combination layout and/or layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes will be also obvious.
Claims (8)
1. the inversion waves AC control circuit for submerged-arc welding, it is characterized in that: described ripple control circuit comprises inversion unit and secondary inverting unit, described inversion unit access power input, and jointly access power output end with secondary inverting unit, wherein:
In a described inversion unit, being at least provided with two IGBT parallel with one another and access power input manages, described two IGBT pipes access respectively transformer separately, for from transformer, the hf and hv pulse voltage after the inversion of IGBT pipe being become to high frequency low voltage pulse voltage and rectification is direct current, and transfer to respectively power output end and secondary inverting unit;
In described secondary inverting unit, be at least provided with two secondary IGBT pipes parallel with one another, after described two secondary IGBT pipe is in parallel, be connected with the low-voltage direct loop after an inversion unit rectification, and access respectively two transformers by the first rectifier bridge separately, and described two secondary IGBT pipe also accesses the power output end of ripple control circuit simultaneously, for exporting in the lump the source of welding current after inversion with an inversion unit;
In described ripple control circuit, also comprise embedded type control module, described embedded type control module accesses respectively two secondary IGBT pipes, and also by two PWM drive circuits of CC/CV Characteristics Control module access, described two PWM drive circuits access respectively two IGBT pipes, for by embedded type control module, an IGBT pipe being controlled with secondary IGBT pipe, positive-negative half-cycle amplitude, frequency and the pulse duty factor of its inverter current are carried out to independent adjusting.
2. the inversion waves AC control circuit for submerged-arc welding according to claim 1, it is characterized in that: described embedded type control module also accesses the waveform control circuit of submerged arc welding carriage, for by coming from the waves AC control signal of submerged arc welding carriage, an inversion unit is implemented to control with an IGBT pipe in secondary inverting unit with secondary IGBT pipe.
3. the inversion waves AC control circuit for submerged-arc welding according to claim 1 and 2, it is characterized in that: two IGBT pipes in a described inversion unit access respectively the power input of ripple control circuit by the second rectifier bridge separately, for the direct current that is 540V by the 380V AC rectification of power input by the second rectifier bridge.
4. the inversion waves AC control circuit for submerged-arc welding according to claim 3, is characterized in that: described PWM drive circuit also accesses between the IGBT pipe and transformer connecting separately, for carrying out peak value sampling.
5. the inversion waves AC control circuit for submerged-arc welding according to claim 4, is characterized in that: between described two IGBT pipes and the second rectifier bridge separately, be also parallel with respectively electric capacity.
6. the inversion waves AC control circuit for submerged-arc welding according to claim 1, is characterized in that: described transformer is nano magnetic core transformer.
7. the inversion waves AC control circuit for submerged-arc welding according to claim 1, it is characterized in that: described embedded type control module also accesses respectively the low-voltage direct loop after inversion unit rectification one time, for positive half cycle and negative half period to electric power outputting current, samples.
8. according to the inversion waves AC control circuit for submerged-arc welding described in claim 1 or 7, it is characterized in that: described embedded type control module is also connected with the power output end of two secondary IGBT pipe access in secondary inverting unit, for carrying out output voltage sampling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320685905.8U CN203526771U (en) | 2013-10-31 | 2013-10-31 | Inverse alternating-current waveform control circuit for use in submerged arc welding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320685905.8U CN203526771U (en) | 2013-10-31 | 2013-10-31 | Inverse alternating-current waveform control circuit for use in submerged arc welding |
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| CN203526771U true CN203526771U (en) | 2014-04-09 |
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| CN201320685905.8U Expired - Lifetime CN203526771U (en) | 2013-10-31 | 2013-10-31 | Inverse alternating-current waveform control circuit for use in submerged arc welding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329947A (en) * | 2016-08-30 | 2017-01-11 | 浙江菲达环保科技股份有限公司 | High-frequency and high-voltage power supply |
| CN110401358A (en) * | 2018-04-25 | 2019-11-01 | 马春辉 | Inverter component, welding/cutting power supply output device and welding and cutting device |
-
2013
- 2013-10-31 CN CN201320685905.8U patent/CN203526771U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329947A (en) * | 2016-08-30 | 2017-01-11 | 浙江菲达环保科技股份有限公司 | High-frequency and high-voltage power supply |
| CN110401358A (en) * | 2018-04-25 | 2019-11-01 | 马春辉 | Inverter component, welding/cutting power supply output device and welding and cutting device |
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Granted publication date: 20140409 |