CN104625368A - Control device of inverter transferred arc type cutting machine - Google Patents
Control device of inverter transferred arc type cutting machine Download PDFInfo
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- CN104625368A CN104625368A CN201410734850.4A CN201410734850A CN104625368A CN 104625368 A CN104625368 A CN 104625368A CN 201410734850 A CN201410734850 A CN 201410734850A CN 104625368 A CN104625368 A CN 104625368A
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- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 56
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 235000014676 Phragmites communis Nutrition 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/006—Control circuits therefor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
- Plasma Technology (AREA)
Abstract
The invention discloses a control device of an inverter transferred arc type cutting machine. The control device comprises an electromagnetic induction collecting module, a voltage switching circuit, a variable reference voltage circuit and a fixed reference voltage circuit. The electromagnetic induction collecting module is used for guiding currents on an arc lead to generate electromagnetic induction through a cutting gun of the inverter transferred arc type cutting machine. The variable reference voltage circuit is used for outputting variable reference voltages. The fixed reference voltage circuit is used for outputting fixed reference voltages. The fixed reference voltages and the variable reference voltages are used for controlling the pulse widths of PWM signals output by an inverter controller of the inverter transferred arc type cutting machine. The voltage switching circuit comprises a reed pipe which is switched on or switched off according to the intensity of electromagnetic induction. The control device lowers the manufacturing cost of the inverter transferred arc type cutting machine, and enables a switching control circuit to be greatly simplified.
Description
Technical field
The present invention relates to inversion transferred arc formula cutting machine technical field, particularly relate to a kind of inversion transferred arc formula cutting machine control device.
Background technology
Plasma cut utilizes the heat of high-temperature plasma electric arc to make the metallic member of workpiece incision or local melting and evaporation, and borrow the isoionic momentum of high speed to get rid of motlten metal to form a kind of processing method of otch.Plasma Are Cutting Machine is then the machinery processed metal material by plasma cutting technique.As a kind of important Plasma Are Cutting Machine, inversion transferred arc formula cutting machine is just obtaining to be applied more and more widely.
In existing inversion transferred arc formula cutting machine, the accurate control of ion arc is become in order to reach arc transfer, great majority are all adopt current mode Hall element to gather current signal, the current signal of collection is gone after amplifying process control relevant circuit, realize arc transfer and become the success of ion arc to turn arc.But because Hall element is expensive, therefore this way not only increases manufacturing cost, and make control circuit too complicated.
Summary of the invention
Based on this, be necessary to provide a kind of inversion transferred arc formula cutting machine control device.
Its technical scheme is as follows:
A kind of inversion transferred arc formula cutting machine control device, comprises electromagnetic induction acquisition module, voltage commutation circuit, variable reference voltage circuit and fixed reference potential circuit;
Described electromagnetic induction acquisition module, for producing electromagnetic induction, the current strength positive correlation on the intensity of described electromagnetic induction and described cutting gun pilot arc go between by the electric current on the cutting gun pilot arc lead-in wire of inversion transferred arc formula cutting machine;
Described voltage commutation circuit comprises tongue tube, and described tongue tube disconnects according to the intensity of described electromagnetic induction or closes;
Described variable reference voltage circuit is for exporting variable reference voltage; Wherein, the magnitude of voltage of described variable reference voltage is adjustable; When described tongue tube disconnects, described variable reference voltage is for controlling the pulse width of inverter controller institute output pwm signal in inversion transferred arc formula cutting machine;
Described fixed reference potential circuit is for exporting fixed reference voltage; When described tongue tube closes, described fixed reference voltage is for controlling the pulse width of inverter controller institute output pwm signal in inversion transferred arc formula cutting machine;
When the intensity of described electromagnetic induction does not reach the closure strength of described tongue tube, described tongue tube disconnects, and it is zero that the described fixed reference voltage that described voltage commutation circuit makes described fixed reference potential circuit export drags down; When the intensity of described electromagnetic induction reaches the closure strength of described tongue tube, described tongue tube closes, and it is zero that the described variable reference voltage that described voltage commutation circuit makes described variable reference voltage circuit export drags down.
Wherein in an embodiment, described electromagnetic induction acquisition module comprises sheet metal, and the electric current on described cutting gun pilot arc lead-in wire produces electromagnetic induction by described sheet metal.
Wherein in an embodiment, described sheet metal is semicircle silicon steel sheet or U-shaped silicon steel sheet, and described cutting gun pilot arc lead-in wire is through described semicircle silicon steel sheet or U-shaped silicon steel sheet.
Wherein in an embodiment, described sheet metal is semicircle silicon steel sheet, and the quantity of described semicircle silicon steel sheet is multi-disc.
Wherein in an embodiment, described voltage commutation circuit comprises tongue tube, the 3rd resistance, the 4th resistance, triode and the first dc source;
One end of described 3rd resistance connects described first dc source, the other end of described 3rd resistance connects one end of described tongue tube and one end of described 4th resistance respectively, the other end ground connection of described tongue tube, the other end of described 4th resistance connects the base stage of described triode, the grounded emitter of described triode, the colelctor electrode of described triode connects described fixed reference potential circuit.
Wherein in an embodiment, described fixed reference potential circuit comprises the first resistance, the second resistance, the second dc source and the first diode;
One end of described first resistance connects described second dc source, the other end of described first resistance connects one end of the colelctor electrode of triode described in described voltage commutation circuit, the positive pole of described first diode and described second resistance respectively, the other end ground connection of described second resistance, the negative pole of described first diode connects described variable reference voltage circuit and for exporting described fixed reference voltage.
Wherein in an embodiment, described variable reference voltage circuit comprises potentiometer, the 5th resistance and the 3rd dc source;
One end of described 5th resistance connects described 3rd dc source, the other end of described 5th resistance connects a stiff end of described potentiometer, another stiff end ground connection of described potentiometer, the adjustable side of described potentiometer connects described fixed reference potential circuit and for exporting described variable reference voltage.
Wherein in an embodiment, described variable reference voltage circuit also comprises the second diode, and the adjustable side of described potentiometer connects described fixed reference potential circuit by described second diode;
The positive pole of described second diode connects the adjustable side of described potentiometer, and the negative pole of described second diode connects the negative pole of described first diode.
Wherein in an embodiment, described variable reference voltage circuit also comprises the 3rd diode;
The positive pole of described 3rd diode connects the adjustable side of described potentiometer, and the negative pole of described 3rd diode is connected to one end that described 3rd resistance is connected with described tongue tube.
Wherein in an embodiment, described first dc source, described second dc source and described 3rd dc source are positive 15V.
Below the advantage of the technical program or principle are described.
Produce electromagnetic induction by the electric current on the cutting gun pilot arc lead-in wire of inversion transferred arc formula cutting machine, the intensity of this electromagnetic induction can be adjusted by the size of current on cutting gun pilot arc lead-in wire.By this flexibly electromagnetic intensity act on the tongue tube of magnetic induction sensitivity, under the state utilizing the sensitiveness of tongue tube to magnetic field intensity that tongue tube is operated in turn on and off, adjust the size of current that electric arc produces, and then control the conversion of electric arc and plasma arc.When described tongue tube disconnects, described variable reference voltage is for controlling the pulse width of inverter controller institute output pwm signal in inversion transferred arc formula cutting machine.When described tongue tube closes, described fixed reference voltage is for controlling the pulse width of inverter controller institute output pwm signal in inversion transferred arc formula cutting machine.The present invention not only reduces the manufacturing cost of inversion transferred arc formula cutting machine, and control switching circuit is simplified greatly.
Accompanying drawing explanation
Fig. 1 is the structural representation of inversion transferred arc formula cutting machine control device of the present invention;
Fig. 2 is the structural representation of a specific embodiment of inversion transferred arc formula cutting machine control device of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
Referring to Fig. 1, is the structural representation of inversion transferred arc formula cutting machine control device of the present invention.
Inversion transferred arc formula cutting machine control device of the present invention, comprises electromagnetic induction acquisition module 10, voltage commutation circuit 20, variable reference voltage circuit 30 and fixed reference potential circuit 40;
Described electromagnetic induction acquisition module 10, for producing electromagnetic induction, the current strength positive correlation on the intensity of described electromagnetic induction and described cutting gun pilot arc go between by the electric current on the cutting gun pilot arc lead-in wire of inversion transferred arc formula cutting machine;
Described voltage commutation circuit 20 comprises tongue tube, and described tongue tube disconnects according to the intensity of described electromagnetic induction or closes;
Described variable reference voltage circuit 30 is for exporting variable reference voltage; Wherein, the magnitude of voltage of described variable reference voltage is adjustable; When described tongue tube disconnects, described variable reference voltage is for controlling the pulse width of inverter controller institute output pwm signal in inversion transferred arc formula cutting machine;
Described fixed reference potential circuit 40 is for exporting fixed reference voltage; When described tongue tube closes, described fixed reference voltage is for controlling the pulse width of inverter controller institute output pwm signal in inversion transferred arc formula cutting machine;
When the intensity of described electromagnetic induction does not reach the closure strength of described tongue tube, described tongue tube disconnects, and it is zero that the described fixed reference voltage that described voltage commutation circuit 20 makes described fixed reference potential circuit 40 export drags down; When the intensity of described electromagnetic induction reaches the closure strength of described tongue tube, described tongue tube closes, and it is zero that the described variable reference voltage that described voltage commutation circuit 20 makes described variable reference voltage circuit 30 export drags down.
It is worthy of note, the inverter controller in Fig. 1 does not belong to the part of inversion transferred arc formula cutting machine control device of the present invention.For more clearly describing operation principle of the present invention, inverter controller is included in Fig. 1.
In addition, although described electromagnetic induction acquisition module 10 is connected by solid line with described voltage commutation circuit 20, and do not mean that they certainly exist the physical connection of parts.By hereinafter known, because described electromagnetic induction acquisition module 10 is contacted by the tongue tube in electromagnetic induction and described voltage commutation circuit 20, connect so both can be only magnetic strengths, do not need to produce actual physical connection.
When forming electric arc when between pole pin and nozzle, pilot arc has electric current to pass through just to create electromagnetic induction on going between, and changes electromagnetic intensity by the size of arc current.Do not reach the closure strength on tongue tube due to the intensity of described electromagnetic induction acquisition module 10 when forming electric arc when between pole pin and nozzle, tongue tube disconnects, at this moment variable reference voltage circuit 30 is supplied to inverter controller variable reference voltage to open PWM (Pulse Width Modulation, pulsewidth modulation) signal.Now, under cutting gun is operated in conditions at the arc.When cutting gun and workpiece come in contact, transferred arc is plasma arc, the intensity of described electromagnetic induction acquisition module 10 exceedes the closure strength on tongue tube, tongue tube closes, at this moment by described switching circuit, the circuit to inverter controller service voltage switches to fixed reference potential circuit by described variable reference voltage circuit.Fixed reference potential circuit 30 is supplied to inverter controller fixed reference voltage, and the magnitude of voltage due to described fixed reference voltage is greater than the magnitude of voltage of described variable reference voltage, and the pwm signal pulsewidth that inverter controller is exported is wider, and arc current increases.Also namely, the magnitude of voltage of described fixed reference voltage is enough large to such an extent as to can maintain under cutting gun is operated in ion arc state, and inversion transferred arc formula cutting machine transfers ion arc to by electric arc.
Wherein in an embodiment, described electromagnetic induction acquisition module comprises sheet metal, and the electric current on described cutting gun pilot arc lead-in wire produces electromagnetic induction by described sheet metal.
Described electromagnetic induction acquisition module adopts sheet metal, and metal and electric current can produce electromagnetic induction.When described cutting gun pilot arc lead-in wire having electric current, described electromagnetic induction acquisition module can produce the electromagnetic induction of respective strengths.
Wherein in an embodiment, described sheet metal is semicircle silicon steel sheet or U-shaped silicon steel sheet, and described cutting gun pilot arc lead-in wire is through described semicircle silicon steel sheet or U-shaped silicon steel sheet.
Semicircle silicon steel sheet or U-shaped silicon steel sheet, be more conducive to produce electromagnetic induction.Described cutting gun pilot arc lead-in wire, through described semicircle silicon steel sheet or U-shaped silicon steel sheet, when described cutting gun pilot arc lead-in wire there being electric current, can produce electromagnetic induction better.
Wherein in an embodiment, described sheet metal is semicircle silicon steel sheet, and the quantity of described semicircle silicon steel sheet is multi-disc.
The sheet number changing semicircle silicon steel sheet can change electromagnetic intensity.When semicircle silicon steel sheet is multi-disc, the size of the electric current on cutting machine pilot arc lead-in wire is constant, the electromagnetic intensity that described electromagnetic induction acquisition module produces will significantly increase, thus tongue tube is closed more easily.
Referring to Fig. 2, is the structural representation of a specific embodiment of inversion transferred arc formula cutting machine control device of the present invention.
In the embodiment shown in Figure 2, described voltage commutation circuit comprises tongue tube K
1, the 3rd resistance R
3, the 4th resistance R
4, triode Q
1with the first dc source VCC;
Described 3rd resistance R
3one end connect described first dc source VCC, described 3rd resistance R
3the other end connect described tongue tube K respectively
1one end and described 4th resistance R
4one end, described tongue tube K
1other end ground connection, described 4th resistance R
4the other end connect described triode Q
1base stage, described triode Q
1grounded emitter, described triode Q
1colelctor electrode connect described fixed reference potential circuit.
It is worthy of note, the label in Fig. 2 does not use subscript, but each label in description and each label in Fig. 2 have one-to-one relationship, such as, K in description
1k1 in corresponding diagram 2, the R in description
3r3 in corresponding diagram 2, and the Q in description
1q1 in corresponding diagram 2, by that analogy.Hereinafter repeat no more.
Embodiment illustrated in fig. 2ly comprise electromagnetic induction acquisition module, voltage commutation circuit and two-way reference voltage circuit (variable reference voltage circuit and fixed reference potential circuit).Cutting gun pilot arc lead-in wire forms electromagnetic induction acquisition module through semicircle silicon steel sheet, when forming electric arc when between pole pin and nozzle, pilot arc has electric current to pass through just to create electromagnetic induction on going between, and changes electromagnetic intensity by the size of arc current and the sheet number of semicircle silicon steel sheet.Described voltage commutation circuit comprises tongue tube K
1, the 3rd resistance R
3, the 4th resistance R
4, triode Q
1, because the intensity of electromagnetic induction acquisition module does not reach K when forming electric arc when between pole pin and nozzle
1k time upper closure strength (being also adhesive intensity)
1disconnect.When the intensity of electromagnetic induction acquisition module is more than K
1on closure strength time, K
1closed.
In the embodiment shown in Figure 2, described fixed reference potential circuit comprises the first resistance R
1, the second resistance R
2, the second dc source VCC (in Fig. 2, described first dc source, described second dc source are identical with described 3rd dc source, are VCC) and the first diode D
1;
Described first resistance R
1one end connect described second dc source VCC, described first resistance R
1the other end connect triode Q described in described voltage commutation circuit respectively
1colelctor electrode, described first diode D
1positive pole and described second resistance R
2one end, described second resistance R
2other end ground connection, described first diode D
1negative pole connect described variable reference voltage circuit and for exporting described fixed reference voltage.
Because the intensity of electromagnetic induction acquisition module does not reach K when forming electric arc when between pole pin and nozzle
1k time upper closure strength (being also adhesive intensity)
1disconnect, work as K
1during disconnection, triode Q
1be operated in saturation region.The voltage of TP1 point close to 0V, described first diode D
1cut-off.It is 0V that described fixed reference potential circuit exports described fixed reference voltage.
When the intensity of electromagnetic induction acquisition module is more than K
1on closure strength time, K
1closed, work as K
1time closed, triode Q
1be in cut-off state.Described first resistance R
1with described second resistance R
2composition bleeder circuit.The voltage of TP1 point is just, makes described first diode D
1conducting, described fixed reference potential circuit exports the voltage that described fixed reference voltage is TP1 point, exports inverter controller to control the pulse width of pwm signal.Work as K
1time closed, it is zero that described variable reference voltage (being also the voltage of the TP2 point in Fig. 2) is dragged down.Also be in Fig. 2, described first diode D
1negative pole and described second diode D
2negative pole be connected, the lref signal then exported.
In the embodiment shown in Figure 2, described variable reference voltage circuit comprises potentiometer VR
2, the 5th resistance R
5with the 3rd dc source VCC;
Described 5th resistance R
5one end connect described 3rd dc source VCC, described 5th resistance R
5the other end connect described potentiometer VR
2a stiff end, described potentiometer VR
2another stiff end ground connection, described potentiometer VR
2adjustable side connect described fixed reference potential circuit and for exporting described variable reference voltage.
The voltage of TP2 point, it is described variable reference voltage.Regulate described potentiometer VR
2the voltage of TP2 point can be changed, also namely change described variable reference voltage, work as K
1during disconnection, powered to inverter controller by variable reference voltage.And then regulate the pulse width of inverter controller institute output pwm signal, the size of cutting gun arc current is regulated.It is worthy of note, the change of the size of cutting gun arc current can be reacted in the change of described electromagnetic intensity.
In the embodiment shown in Figure 2, described variable reference voltage circuit also comprises the second diode D
2, described potentiometer VR
2adjustable side by described second diode D
2connect described fixed reference potential circuit;
Described second diode D
2positive pole connect described potentiometer VR
2adjustable side, described second diode D
2negative pole connect described first diode D
1negative pole.
Second diode D
2effectively can must isolate the impact between described variable reference voltage circuit and described fixed reference potential circuit, play the effect of stabilizing circuit.
In the embodiment shown in Figure 2, described variable reference voltage circuit also comprises the 3rd diode D
3;
Described 3rd diode D
3positive pole connect described potentiometer VR
2adjustable side, described 3rd diode D
3negative pole be connected to described 3rd resistance R
3with described tongue tube K
1the one end be connected.
3rd diode D
3effectively can must isolate the impact between described variable reference voltage circuit and described voltage commutation circuit, play the effect of stabilizing circuit.Work as K
1during disconnection, the voltage of TP2 point is also D
3cathode voltage be just, D
3cathode voltage higher than cathode voltage, D
3cut-off.Powered to inverter controller by the voltage (being also variable reference voltage) of TP2 point.Work as K
1time closed, D
3cathode voltage vanishing, D
3conducting thus to be dragged down by the voltage of TP2 point be zero.Due to K
1d time closed
1conducting, the voltage (being also fixed reference voltage) of TP1 point is just, so D
2cut-off.Powered to inverter controller by the voltage of TP1 point, and the voltage of TP1 point is a larger magnitude of voltage, the pwm signal that inverter controller can be made to export has larger pulse width, thus can maintain cutting gun and switch to larger current needed for ion arc.
Wherein in an embodiment, described first dc source, described second dc source and described 3rd dc source are positive 15V.
The positive 15V of dc source value in the present invention, is easy to realize, reduces hardware cost.Meanwhile, technology needs of the present invention are met again.
Below advantage of the present invention or principle are described.
Produce electromagnetic induction by the electric current on the cutting gun pilot arc lead-in wire of inversion transferred arc formula cutting machine, the intensity of this electromagnetic induction can be adjusted by the size of current on cutting gun pilot arc lead-in wire.By this flexibly electromagnetic intensity act on the tongue tube of magnetic induction sensitivity, under the state utilizing the sensitiveness of tongue tube to magnetic field intensity that tongue tube is operated in turn on and off, adjust the size of current that electric arc produces, and then control the conversion of electric arc and plasma arc.When described tongue tube disconnects, described variable reference voltage is for controlling the pulse width of inverter controller institute output pwm signal in inversion transferred arc formula cutting machine.When described tongue tube closes, described fixed reference voltage is for controlling the pulse width of inverter controller institute output pwm signal in inversion transferred arc formula cutting machine.The present invention not only reduces the manufacturing cost of inversion transferred arc formula cutting machine, and control switching circuit is simplified greatly.
Preferably, utilizing on cutting gun pilot arc lead-in wire has electric current to produce electromagnetic induction by semicircle silicon steel sheet, and by under the state that this tongue tube that electromagnetic intensity acts on magnetic induction sensitivity flexibly makes tongue tube be operated in turn on and off, directly go the conversion controlling electric arc and plasma arc.Simplify control circuit greatly, only need several semicircle silicon steel sheets can realize greatly reducing into manufacturing cost with a tongue tube.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. an inversion transferred arc formula cutting machine control device, is characterized in that, comprises electromagnetic induction acquisition module, voltage commutation circuit, variable reference voltage circuit and fixed reference potential circuit;
Described electromagnetic induction acquisition module, for producing electromagnetic induction, the current strength positive correlation on the intensity of described electromagnetic induction and described cutting gun pilot arc go between by the electric current on the cutting gun pilot arc lead-in wire of inversion transferred arc formula cutting machine;
Described voltage commutation circuit comprises tongue tube, and described tongue tube disconnects according to the intensity of described electromagnetic induction or closes;
Described variable reference voltage circuit is for exporting variable reference voltage; Wherein, the magnitude of voltage of described variable reference voltage is adjustable; When described tongue tube disconnects, described variable reference voltage is for controlling the pulse width of inverter controller institute output pwm signal in inversion transferred arc formula cutting machine;
Described fixed reference potential circuit is for exporting fixed reference voltage; When described tongue tube closes, described fixed reference voltage is for controlling the pulse width of inverter controller institute output pwm signal in inversion transferred arc formula cutting machine;
When the intensity of described electromagnetic induction does not reach the closure strength of described tongue tube, described tongue tube disconnects, and it is zero that the described fixed reference voltage that described voltage commutation circuit makes described fixed reference potential circuit export drags down; When the intensity of described electromagnetic induction reaches the closure strength of described tongue tube, described tongue tube closes, and it is zero that the described variable reference voltage that described voltage commutation circuit makes described variable reference voltage circuit export drags down.
2. inversion transferred arc formula cutting machine control device according to claim 1, it is characterized in that, described electromagnetic induction acquisition module comprises sheet metal, and the electric current on described cutting gun pilot arc lead-in wire produces electromagnetic induction by described sheet metal.
3. inversion transferred arc formula cutting machine control device according to claim 2, it is characterized in that, described sheet metal is semicircle silicon steel sheet or U-shaped silicon steel sheet, and described cutting gun pilot arc lead-in wire is through described semicircle silicon steel sheet or U-shaped silicon steel sheet.
4. inversion transferred arc formula cutting machine control device according to claim 3, it is characterized in that, described sheet metal is semicircle silicon steel sheet, and the quantity of described semicircle silicon steel sheet is multi-disc.
5. inversion transferred arc formula cutting machine control device according to claim 1, it is characterized in that, described voltage commutation circuit comprises tongue tube, the 3rd resistance, the 4th resistance, triode and the first dc source;
One end of described 3rd resistance connects described first dc source, the other end of described 3rd resistance connects one end of described tongue tube and one end of described 4th resistance respectively, the other end ground connection of described tongue tube, the other end of described 4th resistance connects the base stage of described triode, the grounded emitter of described triode, the colelctor electrode of described triode connects described fixed reference potential circuit.
6. inversion transferred arc formula cutting machine control device according to claim 5, it is characterized in that, described fixed reference potential circuit comprises the first resistance, the second resistance, the second dc source and the first diode;
One end of described first resistance connects described second dc source, the other end of described first resistance connects one end of the colelctor electrode of triode described in described voltage commutation circuit, the positive pole of described first diode and described second resistance respectively, the other end ground connection of described second resistance, the negative pole of described first diode connects described variable reference voltage circuit and for exporting described fixed reference voltage.
7. inversion transferred arc formula cutting machine control device according to claim 6, it is characterized in that, described variable reference voltage circuit comprises potentiometer, the 5th resistance and the 3rd dc source;
One end of described 5th resistance connects described 3rd dc source, the other end of described 5th resistance connects a stiff end of described potentiometer, another stiff end ground connection of described potentiometer, the adjustable side of described potentiometer connects described fixed reference potential circuit and for exporting described variable reference voltage.
8. inversion transferred arc formula cutting machine control device according to claim 7, it is characterized in that, described variable reference voltage circuit also comprises the second diode, and the adjustable side of described potentiometer connects described fixed reference potential circuit by described second diode;
The positive pole of described second diode connects the adjustable side of described potentiometer, and the negative pole of described second diode connects the negative pole of described first diode.
9. inversion transferred arc formula cutting machine control device according to claim 8, it is characterized in that, described variable reference voltage circuit also comprises the 3rd diode;
The positive pole of described 3rd diode connects the adjustable side of described potentiometer, and the negative pole of described 3rd diode is connected to one end that described 3rd resistance is connected with described tongue tube.
10. inversion transferred arc formula cutting machine control device according to claim 7, is characterized in that, described first dc source, described second dc source and described 3rd dc source are positive 15V.
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|---|---|---|---|
| CN201410734850.4A CN104625368B (en) | 2014-12-04 | 2014-12-04 | Inversion transferred arc formula cutting machine controls device |
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|---|---|---|---|
| CN201410734850.4A CN104625368B (en) | 2014-12-04 | 2014-12-04 | Inversion transferred arc formula cutting machine controls device |
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| CN104625368B CN104625368B (en) | 2016-07-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106141395A (en) * | 2016-08-12 | 2016-11-23 | 上海交通大学 | Step-down type dc plasma power supply cutting method |
| 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 |
| CN111007295A (en) * | 2019-11-15 | 2020-04-14 | 优利德科技(中国)股份有限公司 | Multimeter capable of automatically measuring |
| CN113927141A (en) * | 2021-09-15 | 2022-01-14 | 成都华远电器设备有限公司 | Arc control method, system and device |
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| CN201848643U (en) * | 2010-11-12 | 2011-06-01 | 深圳市华意隆实业发展有限公司 | Plasma cutting machine with forced transfer function between guiding arc and cutting arc |
| CN201913371U (en) * | 2010-11-16 | 2011-08-03 | 深圳华意隆电气股份有限公司 | Inverter plasma cutting machine with low-energy front guide arc |
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| CN203817607U (en) * | 2013-11-11 | 2014-09-10 | 浙江肯得机电股份有限公司 | Structure of inverter type air plasma arc cutting machine |
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| CN106141395A (en) * | 2016-08-12 | 2016-11-23 | 上海交通大学 | Step-down type dc plasma power supply cutting method |
| 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 |
| CN111007295A (en) * | 2019-11-15 | 2020-04-14 | 优利德科技(中国)股份有限公司 | Multimeter capable of automatically measuring |
| CN113927141A (en) * | 2021-09-15 | 2022-01-14 | 成都华远电器设备有限公司 | Arc control method, system and device |
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