CN203356830U - High-frequency high-voltage arc-striking circuit of plasma cutting machine - Google Patents
High-frequency high-voltage arc-striking circuit of plasma cutting machine Download PDFInfo
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- CN203356830U CN203356830U CN 201320340831 CN201320340831U CN203356830U CN 203356830 U CN203356830 U CN 203356830U CN 201320340831 CN201320340831 CN 201320340831 CN 201320340831 U CN201320340831 U CN 201320340831U CN 203356830 U CN203356830 U CN 203356830U
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Abstract
The utility model relates to a high-frequency high-voltage arc-striking circuit of a plasma cutting machine. The high-frequency high-voltage arc-striking circuit of the plasma cutting machine is used in the plasma cutting machine. The high-frequency high-voltage arc-striking circuit of the plasma cutting machine comprises a filter circuit and a boosted circuit, wherein the boosted circuit comprises a boosted transformer, a spark discharge tube circuit, a resonance capacitive circuit, a high-frequency transformer and a second Y capacitive circuit. The output end of the boosted transformer is connected with the spark discharge tube circuit, the resonance capacitive circuit and one end of a primary winding of the high-frequency transformer, the resonance capacitive circuit is further connected with the other end of the primary winding of the high-frequency transformer, one end of a secondary winding of the high-frequency transformer is connected with the second Y capacitive circuit and is used for being connected with an output positive pole of a power source of the plasma cutting machine, and the other end of the secondary winding of the high-frequency transformer is used for being connected with a positive pole of a cutting torch. The input end of the boosted transformer is connected with the filter circuit, and the second Y capacitive circuit is further used for being connected with a shell of the plasma cutting machine and a negative pole of the cutting torch. The high-frequency high-voltage arc-striking circuit of the plasma cutting machine is reasonable in design, simple in circuit, large in arc-striking power, slight in interference and free of control.
Description
Technical field
The utility model relates to a kind of CUT high-frequency and high-voltage arc ignition circuit, for CUT.
Background technology
CUT comprises frame for movement and electrical control two large divisions, and electric part comprises again the parts such as supply unit, arc initiation device, air-control device, digital control system.The effect of arc initiation device is exactly to produce pilot arc before cutting arc occurs, and ionization occurs and produce plasma jet, and then transferring to smoothly cutting arc, produces cutting current, cut workpiece.In CUT application, arc ignition circuit is vital parts, thereby its research is continued to carry out always.Arc initiation device has polytype: high voltagehigh frequency striking and high pressure hang down frequency striking arc, and active striking and passive striking, respectively have pluses and minuses.Although the high voltagehigh frequency arc ignition circuit has certain interference, arcing initiation success rate is high, and the work period rate is high, thereby is widely used.The high voltagehigh frequency striking comprises series system and parallel way, because series system divides a flow problem without considering, thereby is generally used.
More document occurred up to now, introduced arc ignition circuit miscellaneous, the application scenario of having nothing in common with each other.
Through the retrieval of arc ignition circuit in article on plasma cutting machine power of chopping, find to mainly contain following representative document:
[1] Ding Qiang etc. " CUT striking mode is studied ". electric welding machine. in September, 2010, Vol.40, No.9, pp.:43-45. its technical characteristics is as follows: short circuit type and two kinds of structures of non-short circuit type of summary higher-order of oscillation type, and indirect non-high-frequency arc strike mode, i.e. contacting ignition arc or low frequency striking arc.
[2] Chang Yunlong. " design of novel high-frequency arc initiation device ". the journal .2002 of Shenyang University of Technology February, Vol.23, No.1, its technical characteristics of pp.:8-9. is as follows: proposed several novel high-frequency arc ignition circuits.
More than comprehensive, in the article on plasma cutting machine, the retrieval of arc ignition circuit is found, the party's surface technology has been obtained remarkable progress.But need to consider, to different power grade cutting machines, its arc ignition circuit requires different, as the power grade of arc ignition circuit should be supporting with steel plate thickness, cutting torch type and cutter power grade.In available data, less to introducing of big-and-middle-sized CUT arc ignition circuit, still need to continue to develop arc ignition circuit simple in structure, that parameter configuration is proper, striking is disturbed slightly, arcing initiation success rate is high.
The utility model content
Technical problem to be solved in the utility model be overcome deficiency of the prior art and provide that a kind of reasonable in design, circuit is simple, striking power is large, it is slight to disturb, without the CUT high-frequency and high-voltage arc ignition circuit of controlling.
The technical scheme in the invention for solving the above technical problem is: a kind of CUT high-frequency and high-voltage arc ignition circuit, comprise filter circuit and booster circuit, it is characterized in that: described booster circuit comprises step-up transformer, spark discharge pipe circuit, resonant capacitance circuit, high frequency transformer, the 2nd Y condenser network; The step-up transformer output is connected with armature winding one end of spark discharge pipe circuit, resonant capacitance circuit, high frequency transformer, and described resonant capacitance circuit also is connected with the armature winding other end of high frequency transformer; After one end of the secondary windings of described high frequency transformer and the 2nd Y condenser network are connected, for being connected the Inverter Used in Plasma Cutting output cathode, its other end is for connecting the cutting torch anode; The step-up transformer input is connected with filter circuit; The 2nd Y condenser network is also for connecting CUT housing and cutting torch negative electrode.
Spark discharge pipe circuit described in the utility model comprises the first spark discharge pipe and the second spark discharge pipe, the first spark discharge pipe and the second spark discharge pipe string connection, an output of described step-up transformer is connected with the first spark discharge pipe, and its another output is connected with the second spark discharge pipe.
Resonant capacitance circuit described in the utility model comprises the first resonant capacitance, the second resonant capacitance, the 3rd resonant capacitance, the first resonant capacitance, the second resonant capacitance, the 3rd resonant capacitance parallel connection; An output of described step-up transformer is connected with a common port of the first resonant capacitance, the second resonant capacitance, the 3rd resonant capacitance, and another common port of the first resonant capacitance, the second resonant capacitance, the 3rd resonant capacitance is connected with the armature winding of high frequency transformer.
The 2nd Y condenser network described in the utility model comprises the 3rd Y electric capacity and the 4th Y electric capacity, one end of the 3rd Y electric capacity is connected with an end of the 4th Y electric capacity, the other end of the 3rd Y electric capacity is for connecting the CUT housing, and the other end of the 4th Y electric capacity is for connecting the cutting torch negative electrode; One end of the secondary windings of described high frequency transformer is connected with the common port of the 4th Y electric capacity with the 3rd Y electric capacity.
Filter circuit described in the utility model comprises differential mode capacitor, common mode choke, damping resistance and a Y condenser network; The two ends of described differential mode capacitor are respectively used to connect live wire and the zero line of single phase alternating current power supply, and with two inputs of common mode choke, are connected respectively; Two outputs of described common mode choke are connected with two inputs, a Y condenser network of step-up transformer in the two ends of damping resistance, booster circuit respectively; A described Y condenser network is also for connecting protection ground.
A Y condenser network described in the utility model comprises a Y electric capacity and the 2nd Y electric capacity; two outputs of described common mode choke are connected with an end of the 2nd Y electric capacity with a Y electric capacity respectively, after the other end of a Y electric capacity and the 2nd Y electric capacity links together, for being connected, protect ground.
The utility model compared with prior art, there is following advantage and effect: organically design booster circuit and filter circuit, realize that high-frequency and high-voltage striking and EMMI suppress, can the striking of reliable and secure ground, can absorb consequent striking disturbs, have that striking voltage is high, arcing initiation success rate is high, antijamming capability is strong, with low cost, the characteristics that adapt to relative broad range striking power, big-and-middle-sized CUT on probation application scenario.
The accompanying drawing explanation
Fig. 1 is the utility model embodiment circuit theory diagrams.
The specific embodiment
Below in conjunction with accompanying drawing and by embodiment, the utility model is described in further detail.
Referring to Fig. 1, the utility model embodiment comprises filter circuit 1 and booster circuit 2.Filter circuit 1 is in order to carry out high frequency E MI inhibition, prevents its diffusion, and booster circuit 2 is converted to the alternating voltage of high voltagehigh frequency in order to the alternating voltage by the low pressure low frequency, is used for gas breakdown, produces in advance plasma jet.
Filter circuit 1 comprises differential mode capacitor CD1, common mode choke T1, damping resistance R1 and a Y condenser network; the one Y condenser network comprises a Y capacitor C Y1 and the 2nd Y capacitor C Y2; belong to single-phase three wire system: live wire, zero line and protection ground connect the 120V single phase poaer supply.
The two ends of differential mode capacitor CD1 are respectively used to connect live wire and the zero line of single phase alternating current power supply, and with two inputs of common mode choke T1, are connected respectively.
Two outputs of common mode choke T1 are connected with two inputs of step-up transformer T2 in the two ends of damping resistance R1, booster circuit respectively; two outputs of common mode choke T1 also are connected with the end of the 2nd Y capacitor C Y2 with a Y capacitor C Y1 respectively, after the other end of a Y capacitor C Y1 and the 2nd Y capacitor C Y2 links together, for being connected, protect ground.
In filter circuit 1, differential mode capacitor CD1 is for the filtering DM EMI, and common mode choke T1, a Y capacitor C Y1 and the 2nd Y capacitor C Y2 disturb for filtering common mode, and damping resistance R1 is for consuming clutter and suppressing vibration.This configuration mainly can prevent differential mode and the common mode strong jamming that rear class booster circuit 2 produces.
Booster circuit 2 comprises step-up transformer T2, spark discharge pipe circuit, resonant capacitance circuit, high frequency transformer T3, the 2nd Y condenser network.
Spark discharge pipe circuit comprises the first spark discharge pipe DT1 and the second spark discharge pipe DT2, the first spark discharge pipe DT1 and the second spark discharge pipe DT2 series connection.The output of step-up transformer T2 is connected with the first spark discharge pipe DT1, and its another output is connected with the second spark discharge pipe DT2.
The resonant capacitance circuit comprises the first resonant capacitance CR1, the second resonant capacitance CR2, the 3rd resonant capacitance CR3, the first resonant capacitance CR1, the second resonant capacitance CR2, the 3rd resonant capacitance CR3 parallel connection.The output of step-up transformer T2 is connected with the common port of the first resonant capacitance CR1, the second resonant capacitance CR2, the 3rd resonant capacitance CR3, another common port of the first resonant capacitance CR1, the second resonant capacitance CR2, the 3rd resonant capacitance CR3 is connected with armature winding one end of high frequency transformer T3, and the armature winding other end of high frequency transformer T3 is connected with the step-up transformer output.
The 2nd Y condenser network comprises the 3rd Y capacitor C Y3 and the 4th Y capacitor C Y4; the end of the 3rd Y capacitor C Y3 is connected with the end of the 4th Y capacitor C Y4; the other end of the 3rd Y capacitor C Y3 is for connecting the CUT housing; and then be connected with power protection ground, the other end of the 4th Y capacitor C Y4 is for connecting the cutting torch negative electrode.After the common port of one end of the secondary windings of high frequency transformer T3 and the 3rd Y capacitor C Y3 and the 4th Y capacitor C Y4 is connected, for being connected the Inverter Used in Plasma Cutting output cathode, its other end is for connecting the cutting torch anode.
In booster circuit 2, step-up transformer T2, for boosting, can boost to the 120V alternating voltage 3000V alternating voltage, the first spark discharge pipe DT1 and the second spark discharge pipe DT2 series connection, and the discharge voltage that can raise, realize reliably electric discharge.When the first spark discharge pipe DT1 and the second spark discharge pipe DT2 electric discharge, the secondary short circuit in short-term of step-up transformer T2, cause the higher-order of oscillation between three resonant capacitances and high frequency transformer T3 leakage inductance, produces high pressure, and conduct to high frequency transformer T3 secondary windings.High frequency transformer T3 secondary windings is superimposed upon on Inverter Used in Plasma Cutting negative pole circuit, produces ac high-voltage (15kV～20kV), punctures the gas between nozzle and electrode, produces plasma jet, realizes safe and reliable striking, is about to subsequently initial arc transfer process.The 3rd Y capacitor C Y3 and the 4th Y capacitor C Y4 play the effect of bypass common mode disturbances.
In conjunction with filter circuit 1 and booster circuit 2, the present embodiment input 120V single phase ac voltage, output high voltagehigh frequency voltage is 15kV～20kV.
Above content described in this specification is only to the explanation of the utility model structure example.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, all should belong to protection domain of the present utility model.
Claims (6)
1. a CUT high-frequency and high-voltage arc ignition circuit, comprise filter circuit and booster circuit, it is characterized in that: described booster circuit comprises step-up transformer, spark discharge pipe circuit, resonant capacitance circuit, high frequency transformer, the 2nd Y condenser network; The step-up transformer output is connected with armature winding one end of spark discharge pipe circuit, resonant capacitance circuit, high frequency transformer, and described resonant capacitance circuit also is connected with the armature winding other end of high frequency transformer; After one end of the secondary windings of described high frequency transformer and the 2nd Y condenser network are connected, for being connected the Inverter Used in Plasma Cutting output cathode, its other end is for connecting the cutting torch anode; The step-up transformer input is connected with filter circuit; The 2nd Y condenser network is also for connecting CUT housing and cutting torch negative electrode.
2. CUT high-frequency and high-voltage arc ignition circuit according to claim 1, it is characterized in that: described spark discharge pipe circuit comprises the first spark discharge pipe and the second spark discharge pipe, the first spark discharge pipe and the second spark discharge pipe string connection, an output of described step-up transformer is connected with the first spark discharge pipe, and its another output is connected with the second spark discharge pipe.
3. CUT high-frequency and high-voltage arc ignition circuit according to claim 1, it is characterized in that: described resonant capacitance circuit comprises the first resonant capacitance, the second resonant capacitance, the 3rd resonant capacitance, the first resonant capacitance, the second resonant capacitance, the 3rd resonant capacitance parallel connection; An output of described step-up transformer is connected with a common port of the first resonant capacitance, the second resonant capacitance, the 3rd resonant capacitance, and another common port of the first resonant capacitance, the second resonant capacitance, the 3rd resonant capacitance is connected with the armature winding of high frequency transformer.
4. CUT high-frequency and high-voltage arc ignition circuit according to claim 1, it is characterized in that: described the 2nd Y condenser network comprises the 3rd Y electric capacity and the 4th Y electric capacity, one end of the 3rd Y electric capacity is connected with an end of the 4th Y electric capacity, the other end of the 3rd Y electric capacity is for connecting the CUT housing, and the other end of the 4th Y electric capacity is for connecting the cutting torch negative electrode; One end of the secondary windings of described high frequency transformer is connected with the common port of the 4th Y electric capacity with the 3rd Y electric capacity.
5. CUT high-frequency and high-voltage arc ignition circuit according to claim 1, it is characterized in that: described filter circuit comprises differential mode capacitor, common mode choke, damping resistance and a Y condenser network; The two ends of described differential mode capacitor are respectively used to connect live wire and the zero line of single phase alternating current power supply, and with two inputs of common mode choke, are connected respectively; Two outputs of described common mode choke are connected with two inputs, a Y condenser network of step-up transformer in the two ends of damping resistance, booster circuit respectively; A described Y condenser network is also for connecting protection ground.
6. CUT high-frequency and high-voltage arc ignition circuit according to claim 5; it is characterized in that: a described Y condenser network comprises a Y electric capacity and the 2nd Y electric capacity; two outputs of described common mode choke are connected with an end of the 2nd Y electric capacity with a Y electric capacity respectively, after the other end of a Y electric capacity and the 2nd Y electric capacity links together, for being connected, protect ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320340831 CN203356830U (en) | 2013-06-14 | 2013-06-14 | High-frequency high-voltage arc-striking circuit of plasma cutting machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320340831 CN203356830U (en) | 2013-06-14 | 2013-06-14 | High-frequency high-voltage arc-striking circuit of plasma cutting machine |
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| CN203356830U true CN203356830U (en) | 2013-12-25 |
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| CN 201320340831 Expired - Lifetime CN203356830U (en) | 2013-06-14 | 2013-06-14 | High-frequency high-voltage arc-striking circuit of plasma cutting machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102297A (en) * | 2016-08-17 | 2016-11-09 | 衢州昀睿工业设计有限公司 | There is the control circuit of positive negative wave independence dead zone function element |
| CN109831112A (en) * | 2019-03-28 | 2019-05-31 | 苏州大学 | High-frequency and high-voltage low temperature plasma generating system |
-
2013
- 2013-06-14 CN CN 201320340831 patent/CN203356830U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102297A (en) * | 2016-08-17 | 2016-11-09 | 衢州昀睿工业设计有限公司 | There is the control circuit of positive negative wave independence dead zone function element |
| CN106102297B (en) * | 2016-08-17 | 2018-03-13 | 衢州昀睿工业设计有限公司 | Control circuit with positive negative wave independence dead zone function element |
| CN109831112A (en) * | 2019-03-28 | 2019-05-31 | 苏州大学 | High-frequency and high-voltage low temperature plasma generating system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |