CN201967233U - Leading arc circuit controlled by single-tube IGBT - Google Patents
Leading arc circuit controlled by single-tube IGBT Download PDFInfo
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- CN201967233U CN201967233U CN2010206265605U CN201020626560U CN201967233U CN 201967233 U CN201967233 U CN 201967233U CN 2010206265605 U CN2010206265605 U CN 2010206265605U CN 201020626560 U CN201020626560 U CN 201020626560U CN 201967233 U CN201967233 U CN 201967233U
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- leading arc
- circuit
- tube igbt
- arc circuit
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Abstract
The utility model provides a leading arc circuit controlled by a single-tube IGBT (insulated-gate bipolar transistor), which belongs to a control circuit and is used for playing a control role in arcing of a non high frequency plasma cutting machine, The leading arc circuit has two functions to be completed, the first function is the on-off control upon both a spray nozzle and a power supply positive terminal, the second function is limiting the instantaneous high current between the spray nozzle and a electrode needle caused by short circuit. The traditional leading arc circuit realizes the functions through adopting both a relay and a current-limiting resistor, while the novel leading arc circuit aims to overcome the defects of the conventional leading arc circuit through realizing the two functions by adopting the single-tube IGBT to replace the relay and the current-limiting resistor. The novel leading arc circuit has the characteristics of good continuity of the leading arc, reliable stable property, low cost, small size and the like.
Description
Technical field
The leading arc circuit of the utility model single tube IGBT control belongs to a kind of control circuit, specifically is applied to the control of non-high frequency plasma cutting machine when the starting the arc.
Background technology
The starting the arc mode of plasma cutting machine has experienced high frequency contact, high-frequency transfer (HFT) arc formula, non-high-frequency transfer (HFT) arc formula several stages, wherein, non-high-frequency transfer (HFT) arc formula is relatively more novel at present a kind of method, though have starting the arc success rate height, to advantages such as the interference of system are little, safe and reliable, the subject matter that exists is that the leading arc duration is short.
Leading arc circuit generally need be finished two functions, and the one, the break-make control of nozzle and power positive end; The 2nd, the big electric current of limits nozzle and electrode needle transcient short circuit time, therefore, leading arc circuit is made up of switch and current-limiting circuit two parts usually.
See also shown in the diagram 1, traditional leading arc circuit generally adopts relay and current-limiting resistance to realize above-mentioned two kinds of functions.Adopt relay to control the break-make of leading arc, relay is mechanical switch, position change by the contact is realized break-make, this can produce the time-delay of Millisecond, current interruption phenomenon when this delay time is easy to cause and switches to leading arc by minor arc, simultaneously, the time-delay of Millisecond also can cause when switching to minor arc by leading arc has bigger electric current to flow through nozzle, to also having very big influence in useful life of nozzle.Adopt the current-limiting resistance current limliting, have problems such as volume is big, cost is high, heat radiation is bad.Traditional cutting machine is in order to limit the peak value of electric current, the resistance of selecting is generally more than 1 ohm, and (the striking electric current is little, and arcing initiation success rate is low as if calculating by pilot arc electric current 12 peaces, generally will 12 the peace more than), then need 144 watts resistance, select powerful current-limiting resistance like this for use, cost will be on 20 yuan, volume is bigger, and can not long time continuous working, otherwise need to increase bigger cooling system, complex structure.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that existing leading arc circuit exists, single tube IGBT is provided the leading arc circuit of control, replace relay and current-limiting resistance to realize two functions that leading arc circuit need be finished with single tube IGBT, thus effectively solve because of relay control current interruption problem that leading arc break-make produced, because of volume that current-limiting resistance causes is big, cost is high, the problem of heat radiation difficulty.
For achieving the above object, the utility model has adopted following technical scheme:
The leading arc circuit of the utility model single tube IGBT control, characteristics are: keeping using a single tube IGBT under the constant situation of traditional circuit, replace relay and current-limiting resistance in the traditional circuit.
As a kind of preferred version of the present utility model, utilize triode, photoelectrical coupler, two complementary triodes that single tube is controlled, thereby the grid of single tube IGBT can be changed between high level and low level, make single tube IGBT when work, have on off state, thereby finish the function of relay.
As another kind of preferred version of the present utility model, use single tube IGBT, himself had internal resistance originally, can realize the function of current limliting.It is characterized in that: only need in single tube IGBT, increase a fin, can realize heat sinking function, thereby can realize spraying continuously the function of arc.
Compared with prior art, characteristics of the present utility model are: adopt a single tube IGBT to replace relay and current-limiting resistance, have characteristics such as leading arc continuation is good, stable and reliable for performance, cost is low, volume is little.On the cost, the cost of single tube IGBT and fin will be lower than the cost of relay and current-limiting resistance; On the structure, the volume of single tube IGBT is 1/10 of relay and a current-limiting resistance, and the space of well having saved complete machine is suitable in the Circuits System of portable cutter very much.Complicated cooling system link because of having saved the device of current-limiting resistance, has also just been saved in the heat radiation aspect, for single tube IGBT, only need provide a fin, then is enough to finish good heat sinking function, can not cause the current interruption phenomenon.
Description of drawings
Fig. 1 is traditional leading arc circuit control chart
Fig. 2 is the leading arc circuit figure of the utility model single tube IGBT control
Fig. 3 is the complete machine of leading arc circuit of the utility model single tube IGBT control and the connection diagram of burning torch
Fig. 4 is the cut workpiece view of the leading arc circuit of the utility model single tube IGBT control
Embodiment
Below in conjunction with drawings and embodiments; further specify the utility model; but the utility model is not limited to these execution modes, any on the utility model essence spirit improvement or substitute, still belong to scope required for protection in the utility model claims.
In the present embodiment, see also shown in diagram 1 and the diagram 2, diagram 1 is traditional leading arc circuit control chart, is realized two functions of leading arc circuit by relay and current-limiting resistance.Diagram 2 is the leading arc circuit of the utility model single tube IGBT control, and relay and current-limiting resistance that the difference of diagram 1 is to be connected between OUT+ and the leading arc replace with a single tube IGBT (Q001).With this circuit application in CUT-12D type plasma cutting machine, when leading arc control end when being high, transistor collector Q106 is dragged down, at this moment photoelectrical coupler U108 interior light emitting diodes conducting, make the phototriode collector electrode of inside of photoelectrical coupler U108 and the resistance of emitter reduce, + 15V power supply is by the phototriode of photoelectrical coupler U108 inside, pass through resistance R 132 again, be added to the base stage of triode Q103, make collector electrode and the emitter conducting of triode Q103, thereby make the grid of single tube IGBT (Q001) become high level, the collector electrode of single tube IGBT (Q001) and emitter conducting, thereby make OUT+ be communicated with leading arc, leading arc forms.When the signal step-down of leading arc control end, opposite with above-mentioned situation just, single tube IGBT (Q001) shutoff, leading arc is turned off.R135 among the figure, D108 are used for leading arc indication.
In the present embodiment, single tube IGBT (Q001) opens the time-delay of hundreds of nanosecond, in this process, the resistance of single tube IGBT (Q001) reduces gradually, so moment of opening, between the collector electrode of single tube IGBT (Q001) and the emitter bigger resistance is arranged, effectively transient suppression impacts, and has played the purpose of current-limiting resistance.When minor arc switched to leading arc, the time-delay of hundreds of nanosecond can not cause the current interruption phenomenon, and was stable and reliable for performance.
In the present embodiment, see also shown in the diagram 3, diagram 3 be the complete machine of the leading arc circuit controlled of the utility model single tube IGBT and the connection diagram of burning torch, equally in CUT-12D type plasma cutting machine, to be embodied as example, after the burning torch switch is pressed, the OUT+ end is connected through the leading arc output of leading arc circuit and cutting machine, receive the nozzle of burning torch again, and the OUT-of cutting machine terminates to the electrode needle of burning torch, so just be equivalent between the nozzle and electrode that voltage is added to burning torch, and nozzle and electrode needle are to be in short-circuit condition before by the rifle switch, after pressing the burning torch switch, voltage will form electric current after forming between nozzle and electrode needle, next gas blows nozzle and electrode needle open, at this moment will form little arc between nozzle and electrode.
In the present embodiment, see also shown in the diagram 4, diagram 4 is the cut workpiece view of the leading arc circuit of the utility model single tube IGBT control.Equally in CUT-12D type plasma cutting machine, to be embodied as example, after leading arc forms, on the workpiece of the close directly connection of nozzle power positive end OUT+, just form the bigger electric arc of energy between electrode needle and workpiece, be minor arc, by leading arc circuit, nozzle was disconnected with being connected of power positive end OUT+, leading arc is cut off, and begins cutting.
Claims (2)
1. the leading arc circuit of single tube IGBT control mainly is made up of leading arc control end, and be primarily characterized in that: leading arc control end is made of photoelectrical coupler, triode, two complementary triodes, single tube IGBT successively.
2. the leading arc circuit of single tube IGBT control according to claim 1, described single tube IGBT is by the triode control of triode, photoelectrical coupler, two complementations, and the grid of described single tube IGBT can be changed between high level and low level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206265605U CN201967233U (en) | 2010-11-24 | 2010-11-24 | Leading arc circuit controlled by single-tube IGBT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206265605U CN201967233U (en) | 2010-11-24 | 2010-11-24 | Leading arc circuit controlled by single-tube IGBT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201967233U true CN201967233U (en) | 2011-09-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206265605U Expired - Fee Related CN201967233U (en) | 2010-11-24 | 2010-11-24 | Leading arc circuit controlled by single-tube IGBT |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201967233U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103747606A (en) * | 2013-12-27 | 2014-04-23 | 华中科技大学 | Circuit generated low temperature plasma |
| CN109807506A (en) * | 2018-12-30 | 2019-05-28 | 上海广为焊接设备有限公司 | For controlling the circuit of cutting machine cutting arc and pilot arc conversion |
-
2010
- 2010-11-24 CN CN2010206265605U patent/CN201967233U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103747606A (en) * | 2013-12-27 | 2014-04-23 | 华中科技大学 | Circuit generated low temperature plasma |
| CN109807506A (en) * | 2018-12-30 | 2019-05-28 | 上海广为焊接设备有限公司 | For controlling the circuit of cutting machine cutting arc and pilot arc conversion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI HUGONG WELDERING GROUP CO., LTD. Free format text: FORMER NAME: SHANGHAI HUGONG ELECTRIC WELDER (GROUP) CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 201700 No. 7177 Pine Road, Qingpu District, Shanghai Patentee after: Shanghai Hugong Welding Group Co., Ltd. Address before: 201700 No. 7177 Pine Road, Qingpu District, Shanghai Patentee before: Shanghai Hugong Electric Welding Machine (Group) Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20171124 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |