CN203791803U - Inverter arc welding power supply employing IGBT for secondary switching control - Google Patents
Inverter arc welding power supply employing IGBT for secondary switching control Download PDFInfo
- Publication number
- CN203791803U CN203791803U CN201420125785.0U CN201420125785U CN203791803U CN 203791803 U CN203791803 U CN 203791803U CN 201420125785 U CN201420125785 U CN 201420125785U CN 203791803 U CN203791803 U CN 203791803U
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- arc welding
- welding power
- igbt
- power source
- dsp
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- Arc Welding Control (AREA)
Abstract
The utility model discloses an inverter arc welding power supply employing an IGBT for secondary switching control. The IGBT Q1 serially connected to a secondary circuit of the inverter arc welding power supply with the IGBT full-bridge soft switch structure serves as a switching element; the IGBT Q1 is controlled by a control member in the inverter arc welding power supply with the IGBT full-bridge soft switch structure. The inverter arc welding power supply is simple and reliable for driving, high in current capacity, and high in control speed; welding waveform control is achieved effectively; welding spatter is greatly decreased.
Description
Technical field
The utility model relates to electric welding machine field, relates in particular to a kind of inverse type Arc Welding Power.
Background technology
Present stage adopts maximum control methods or by Current Feedback Control closed loop, change output current wave on the basis of inverter self-regulation speed and reaches and improve welding current waveform, reduce the object of splashing in the welding Waveform Control of gas metal-arc welding.This control method, due to the restriction in the control time of inverter hardware self, makes Current Control limited speed, finally spatter is had some improvement, but effect is obvious not.Lincoln STT welding machine adopts at a Darlington transistor of secondary circuit series connection and has obtained desirable control rate, effectively reduces the generation of spatter, but the driving of Darlington transistor have relatively high expectations, circuit is complicated, cost is high, pipe heating is also more serious.
Utility model content
The utility model aims to provide the contravariant arc welding power source that a kind of IGBT of employing controls as secondary switch, drives simple and reliablely, and current capacity is large, and control rate is fast, can effectively reach the object of welding Waveform Control, greatly reduces spatter.
For achieving the above object, the utility model is realized by the following technical solutions:
The contravariant arc welding power source that the disclosed employing of the utility model IGBT controls as secondary switch, be in the secondary circuit of the contravariant arc welding power source of IGBT full-bridge soft-switching structure, to connect an IGBT pipe Q1 as switch element, described IGBT pipe Q1 is controlled by the control assembly of the contravariant arc welding power source of IGBT full-bridge soft-switching structure.
Further, described control assembly is two DSP structures, comprises for controlling a DSP of contravariant arc welding power source inverter bridge and for the 2nd DSP of the welding circuit parameter of sampling, a described DSP, the 2nd DSP are connected and share dual port RAM.
Further, described IGBT pipe Q1 is provided with peak voltage absorbing circuit, and described peak voltage absorbing circuit is connected in parallel between the collector and emitter of IGBT pipe Q1.
Further, the utility model also comprises the overheated detection module for detection of contravariant arc welding power source inverter bridge temperature, and described overheated detection module is connected between contravariant arc welding power source inverter bridge and a DSP.
Preferably, described peak voltage absorbing circuit is RDC peak voltage absorbing circuit, and described RDC peak voltage absorbing circuit is that the shunt circuit that diode D1 series connection is comprised of resistance R 1, capacitor C 1 forms, the colelctor electrode of the anodic bonding IGBT pipe Q1 of diode D1.
Further, the utility model also comprises man-machine interface, and described man-machine interface connects the 2nd DSP by CAN bus or RS485 bus.
Further, the utility model also comprises liquid crystal display, wire feeder, and described liquid crystal display, wire feeder all connect the 2nd DSP.
Further, the utility model also comprises current sample module, voltage sample module, welding gun state detection module, and described current sample module, voltage sample module, welding gun state detection module all connect the 2nd DSP.
The utility model adopts the requirement that reaches control rate at IGBT of welding secondary circuit series connection, effectively reduces the loss of IGBT, and guarantees that by RDC peak voltage absorbing circuit IGBT, not by voltage breakdown, has guaranteed the reliability of IGBT; Use IGBT as secondary switching tube, drive simple and reliablely, current capacity is large, and control rate is fast, can effectively reach the object of welding Waveform Control, greatly reduces spatter.
Accompanying drawing explanation
Fig. 1 is the utility model theory diagram.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model is further elaborated.
As shown in Figure 1, the contravariant arc welding power source that the disclosed employing of the utility model IGBT controls as secondary switch, major loop adopts IGBT full-bridge soft-switching structure, the input 380V three-phase alternating current of input rectifying module, rectification outputs to IGBT full-bridge inverting module, the output of inversion module connects the former limit of high frequency voltage descending transformer, one end of the secondary of high frequency voltage descending transformer connects one end of out put reactor L1, the other end of out put reactor L1 connects the colelctor electrode of IGBT pipe Q1, the emitter stage of IGBT pipe Q1 connects welding gun, the other end of the secondary of high frequency voltage descending transformer connects workpiece.
Control assembly of the present utility model adopts two DSP to form, the one DSP controls inversion module and IGBT pipe Q1 by inversion driver module and secondary IGBT driver module respectively, and a DSP connects for detection of the overheated detection module of inversion module temperature with for detection of the primary current peak value sampling module of inverter output current, the 2nd DSP connects current sample module and the voltage sample module for detection of welding current and weldingvoltage, also connect the welding gun state detection module for detection of arc welding gun switch make-and-break signal, the 2nd DSP also connects for showing the liquid crystal display of welding parameter, for setting the man-machine interface of welding parameter, wire feeder for wire feed, the 2nd DSP also can connect host computer, by PC control work of the present utility model, wherein: man-machine interface can adopt text screen or touch-screen, host computer can be computer or PLC controller, man-machine interface, host computer adopts CAN bus or RS485 bus with being connected of the 2nd DSP.This utility model adopts dual port RAM simultaneously for a DSP and the 2nd DSP provide buffer-stored, guarantees read or write speed.
The working power of control assembly is controlled power supply and is taken from any two that three-phase 380V interchange is inputted, the utility model also comprises power supply detection module, power supply detection module comprises the testing circuits such as overvoltage, under-voltage, overcurrent, phase shortage, and power supply detection module is connected to three-phase 380V and exchanges between input and the 2nd DSP.
Operation principle of the present utility model is as follows: three-phase 380V exchanges input and obtain DC voltage after input rectifying filtering, the low-voltage direct that obtains again needs by obtaining high frequency low voltage AC signal after the inversion of IGBT full-bridge inverter after secondary filtering high-frequency rectifier is exported, after outputting inductance L1 filtering, by secondary IGBT switch Q1, control output current wave and make output current and droplet transfer want to mate, reduce and splash, improve appearance of weld.Output current/voltage signal is converted to by a DSP the given signal of current/voltage that data signal transmits by dual port RAM with the 2nd DSP and compares after sampling, thereby the ON time of operation result being delivered to inverse changing driving circuit control inverter by computing reaches the object of control output current/voltage swing.The control of welding waveform is by a DSP, the interpretation of result of sample rate current/voltage signal to be calculated the transient process of judgement molten drop, and by secondary IGBT, drive and control the variation that secondary switch I GBT pipe Q1 controls output current fast in good time, reach the object of controlling welding current waveform.The 2nd DSP is responsible for control, fault detect, Communication Control of welding machine duty, parameter setting, man-machine interface, wire feeder etc.
Certainly; the utility model also can have other various embodiments; in the situation that not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (8)
1. one kind adopts IGBT as the contravariant arc welding power source of secondary switch control, it is characterized in that: the IGBT pipe Q1 that connects in the secondary circuit of the contravariant arc welding power source of IGBT full-bridge soft-switching structure is as switch element, and described IGBT pipe Q1 is controlled by the control assembly of the contravariant arc welding power source of IGBT full-bridge soft-switching structure.
2. the contravariant arc welding power source that employing IGBT according to claim 1 controls as secondary switch, it is characterized in that: described control assembly is two DSP structures, comprise for controlling a DSP of contravariant arc welding power source inverter bridge and for the 2nd DSP of the welding circuit parameter of sampling, a described DSP, the 2nd DSP are connected and share dual port RAM.
3. the contravariant arc welding power source that employing IGBT according to claim 1 controls as secondary switch, it is characterized in that: described IGBT pipe Q1 is provided with peak voltage absorbing circuit, and described peak voltage absorbing circuit is connected in parallel between the collector and emitter of IGBT pipe Q1.
4. the contravariant arc welding power source that employing IGBT according to claim 1 controls as secondary switch, it is characterized in that: also comprise the overheated detection module for detection of contravariant arc welding power source inverter bridge temperature, described overheated detection module is connected between contravariant arc welding power source inverter bridge and a DSP.
5. the contravariant arc welding power source that employing IGBT according to claim 3 controls as secondary switch, it is characterized in that: described peak voltage absorbing circuit is RDC peak voltage absorbing circuit, described RDC peak voltage absorbing circuit is that the shunt circuit that diode D1 series connection is comprised of resistance R 1, capacitor C 1 forms, the colelctor electrode of the anodic bonding IGBT pipe Q1 of diode D1.
6. the contravariant arc welding power source that employing IGBT according to claim 2 controls as secondary switch, is characterized in that: also comprise man-machine interface, described man-machine interface connects the 2nd DSP by CAN bus or RS485 bus.
7. the contravariant arc welding power source that employing IGBT according to claim 2 controls as secondary switch, is characterized in that: also comprise liquid crystal display, wire feeder, described liquid crystal display, wire feeder all connect the 2nd DSP.
8. the contravariant arc welding power source that employing IGBT according to claim 2 controls as secondary switch, it is characterized in that: also comprise current sample module, voltage sample module, welding gun state detection module, described current sample module, voltage sample module, welding gun state detection module all connect the 2nd DSP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125785.0U CN203791803U (en) | 2014-03-19 | 2014-03-19 | Inverter arc welding power supply employing IGBT for secondary switching control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125785.0U CN203791803U (en) | 2014-03-19 | 2014-03-19 | Inverter arc welding power supply employing IGBT for secondary switching control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203791803U true CN203791803U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420125785.0U Expired - Fee Related CN203791803U (en) | 2014-03-19 | 2014-03-19 | Inverter arc welding power supply employing IGBT for secondary switching control |
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| CN (1) | CN203791803U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825860A (en) * | 2017-01-19 | 2017-06-13 | 南京力仕达焊接科技有限公司 | Inverter type welder failure detector |
| CN107309528A (en) * | 2017-04-24 | 2017-11-03 | 四川玛瑞焊业发展有限公司 | The double arc digitlization submerged arc welding electric powers of mariages |
-
2014
- 2014-03-19 CN CN201420125785.0U patent/CN203791803U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825860A (en) * | 2017-01-19 | 2017-06-13 | 南京力仕达焊接科技有限公司 | Inverter type welder failure detector |
| CN106825860B (en) * | 2017-01-19 | 2019-10-11 | 南京力仕达焊接科技有限公司 | Inverter type welder fault detection means |
| CN107309528A (en) * | 2017-04-24 | 2017-11-03 | 四川玛瑞焊业发展有限公司 | The double arc digitlization submerged arc welding electric powers of mariages |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20150319 |
|
| EXPY | Termination of patent right or utility model |