CN207464422U - The isolated keep-alive circuit of plasma cut - Google Patents
The isolated keep-alive circuit of plasma cut Download PDFInfo
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- CN207464422U CN207464422U CN201720947483.5U CN201720947483U CN207464422U CN 207464422 U CN207464422 U CN 207464422U CN 201720947483 U CN201720947483 U CN 201720947483U CN 207464422 U CN207464422 U CN 207464422U
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- circuit
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- major loop
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Abstract
The utility model belongs to cutting machine control field, is related to a kind of isolated keep-alive circuit of plasma cut.The keep-alive circuit is made of winding, current rectifying and wave filtering circuit and arc maintenance the control relay being linked in sequence；It is shared through Hall element and major loop Hall.The utility model is not in the case where changing major loop, install a winding additional on main transformer, form a new element loop, the voltage that this winding is exported is after bridge rectifier filters, output cathode connects the output of cutting machine anode through being shared with major loop Hall, cathode connects arc maintenance output terminal by reactor, and arc maintenance control is controlled by the relay of access winding.It works independently with keep-alive circuit, keep-alive circuit component wear after failure apparent, easy to maintenance, keep-alive circuit failure will not cause major loop damage the characteristics of relatively independent with major loop.The considerations of in terms of for stability, keep-alive circuit has accessed the reponse system of Hall element, safer.
Description
Technical field
The utility model belongs to cutting machine control field, is related to a kind of isolated keep-alive circuit of plasma cut.
Background technology
Plasma arc due to have the characteristics that energy density is high, impact force is big, arc stability and be used widely, such as
Ion arc-welding, plasma cut etc..But plasma arc uses transferred arc or associative form arc, and either direct current is still handed over
Stream, when igniting main arc or in main arc combustion process, is all utilized untransferable arc and burns between nozzle tungsten electrode
Electric arc, its effect is to provide conductive channel, stablizes main arc and as auxiliary thermal source etc., therefore also referred to as arc maintenance.Arc maintenance
Presence or absence and its form the stability of minor arc, welding and cutting process and product quality are suffered from it is extremely important
It influences.
The advantages of convenience practicability and secure context of plasma cutting machine, has promoted a wide range of popularization of the kind equipment,
And the striking mode of the kind equipment is divided into as high-frequency arc strike and the striking of arc maintenance mode (also known as transferred arc), it is most widely used just
It is arc maintenance mode striking.Patent about high-frequency arc strike is for example：Notification number：The patent of 202607044U《A kind of cutting machine control
Module》Disclosed cutting machine control module, including for high-voltage electricity to be converted to the decompression modular converter of low-voltage DC, is cut
Module, the high-frequency and high-voltage module for high-frequency high-voltage needed for being provided to cutting module are cut, for preventing high-frequency and high-voltage module
The isolation module of high-frequency high-voltage current interference decompression modular converter.The utility model passes through in cutting module and decompression modular converter
Between add isolation module, on the one hand so that the high-frequency current of the starting the arc does not interfere with decompression modular converter, on the other hand also make
When must cut workpiece, the small electric arc between nozzle and electrode needle disappears automatically, saves the energy, ensures safety.
Research about arc maintenance is also relatively more in recent years, such as notification number：201249327 patent《High-power MOS FET
Inverter type plasma cutting machine》The high high-power MOS FET inverter type plasma cutting machines of disclosed cyclic duration factor, including suitable
The EMC circuits of sequence connection, input rectifying filter circuit, inverter circuit, isolated buck circuit, secondary current rectifying and wave filtering circuit, control
Circuit, isolated drive circuit, and isolated drive circuit is connected with inverter circuit, particularly equipped with high frequency keep-alive circuit, the high frequency
Keep-alive circuit and the two-way unicom of secondary current rectifying and wave filtering circuit.The high frequency keep-alive circuit is connected and composed by relay and peripheral circuits.
Equipped with hand switch control circuit, host is made to form air channel structure equipped with pcb board and F shape cooling fins.
Notification number：201183170 patent《Low frequency pilot arc MOSFET inversion plasma cutting machine》Disclosed contravariant etc.
Ion cutting machine.Including the EMC circuits, input rectifying filter circuit, inverter circuit, isolated buck circuit, secondary being linked in sequence
Current rectifying and wave filtering circuit, control circuit, isolated drive circuit, and isolated drive circuit is connected with inverter circuit, is particularly provided with low frequency
Keep-alive circuit, the low frequency keep-alive circuit and the two-way unicom of secondary current rectifying and wave filtering circuit.The low frequency keep-alive circuit is by operational amplifier
LM358, field-effect tube VT11, triode Q3, relay (RELAY1, RELAY2) and peripheral circuits connect and compose.Equipped with full-bridge
Inverter circuit connects into air channel structure equipped with pcb board and F shape cooling fins.
Notification number：The patent of 202097491U《A kind of plasma cutting pilot arc circuit》Disclosed plasma cut arc maintenance electricity
Road includes the first detection circuit, the control circuit being connect with the first detection circuit；The second detection circuit being connect with control circuit,
The signal control circuit being connect with the second detection circuit, given circuit and signal generating circuit.The utility model solves tradition
Electric current is generated heat more serious by thermistor when cutting gun is due to work, and back ground current is prevented to repeat arc maintenance work(from continuing through
Can be also poor the technical issues of, by improved circuit, back ground current is constant when making cutting, and the electric arc of ejection is continuous, can
Repeated arc maintenance；And power dissipation is small, and back ground current is stablized, and arc transfer success rate is high.
And often occur, since keep-alive circuit design is not reasonable, to cause keep-alive circuit component damage in practical applications
The phenomenon that causing cutting machine that can not work or even major loop is caused to damage, and since major loop composition is general relatively complicated,
Troubleshooting and repair are more complicated, time-consuming, can substantially reduce working efficiency.Therefore one kind is developed to be relatively isolated with major loop
Keep-alive circuit problem to be solved in the utility model.
Utility model content
To solve the above problems, the utility model provides a kind of isolated keep-alive circuit of plasma cut.
To achieve the above object, the technical solution of the utility model is as follows：
A kind of isolated keep-alive circuit of plasma cut is controlled by the winding, current rectifying and wave filtering circuit and arc maintenance that are linked in sequence
Relay forms；The current rectifying and wave filtering circuit is made of unidirectional full-wave bridge rectifier circuit and LC filter circuits；Described in during use
The output cathode of current rectifying and wave filtering circuit connects the output of cutting machine anode, and the output negative pole of the current rectifying and wave filtering circuit connects arc maintenance output
End；
Plasma cut circuit is generally the major loop for including main transformer；The major loop is by the main transformer pressure that is linked in sequence
Device, current rectifying and wave filtering circuit and striking coil composition；The current rectifying and wave filtering circuit is filtered by unidirectional full-wave bridge rectifier circuit and LC
Circuit forms；The output cathode of the current rectifying and wave filtering circuit connects the output of cutting machine anode, the rectification through Hall element during use
The output negative pole of filter circuit connects cathode output through striking coil；
The keep-alive circuit is shared through Hall element and major loop Hall；
Further, the major loop further includes IGBT (Insulated Gate Bipolar Transistor), exchange system
The voltage of system inputs main transformer again after IGBT pressure control current limlitings, can adjust output voltage as needed, disclosure satisfy that a variety of
The requirement of operating mode.
The utility model installs a winding additional in the case where not changing major loop on main transformer, forms one newly
Element loop, the voltage that this winding is exported is after bridge rectifier filters, and output cathode is through Hall element (with major loop
Hall shares) output of cutting machine anode, general anode output ground wire are connect, cathode connects arc maintenance output terminal by arc maintenance reactor,
And arc maintenance control is controlled by the relay of access winding.The considerations of in terms of for stability, keep-alive circuit has accessed Hall element
Reponse system, it is safer.
Advantageous effect
The utility model works independently with keep-alive circuit, relatively independent with major loop, event after keep-alive circuit component wear
Hinder apparent, easy to maintenance, the characteristics of keep-alive circuit failure will not cause major loop to damage.The considerations of in terms of for stability, dimension
Arc circuit has accessed the reponse system of Hall element, safer.
Description of the drawings
Fig. 1 is the utility model circuit block diagram；
Fig. 2 is the utility model circuit diagram.
Specific embodiment
1 the utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1,
A kind of isolated keep-alive circuit of plasma cut is controlled by the winding, current rectifying and wave filtering circuit and arc maintenance that are linked in sequence
Relay forms；The current rectifying and wave filtering circuit is made of unidirectional full-wave bridge rectifier circuit and LC filter circuits；Described in during use
The output cathode of current rectifying and wave filtering circuit connects the output of cutting machine anode, and the output negative pole of the current rectifying and wave filtering circuit connects arc maintenance output
End；
Plasma cut circuit is generally the major loop for including main transformer；The major loop is by the main transformer pressure that is linked in sequence
Device, current rectifying and wave filtering circuit and striking coil composition；The current rectifying and wave filtering circuit is filtered by unidirectional full-wave bridge rectifier circuit and LC
Circuit forms；The output cathode of the current rectifying and wave filtering circuit connects the output of cutting machine anode, the rectification through Hall element during use
The output negative pole of filter circuit connects cathode output through striking coil；
The keep-alive circuit is shared through Hall element and major loop Hall；
Further, the major loop further includes IGBT (Insulated Gate Bipolar Transistor), exchange system
The voltage of system inputs main transformer again after IGBT pressure control current limlitings, can adjust output voltage as needed, disclosure satisfy that a variety of
The requirement of operating mode.
Above example is only to illustrate the technical solution of the utility model rather than its limitations, the common skill of fields
Art personnel are to be understood that：Those skilled in the art still can modify or wait to specific embodiment of the utility model
With replacement, but these modifications or change are among pending claims are applied for.
Claims (8)
1. a kind of isolated keep-alive circuit of plasma cut, by the winding, current rectifying and wave filtering circuit and the arc maintenance control that are linked in sequence after
Electric appliance forms；It is characterized in that, the keep-alive circuit is shared through Hall element and major loop Hall.
2. the isolated keep-alive circuit of plasma cut according to claim 1, which is characterized in that the current rectifying and wave filtering circuit by
Unidirectional full-wave bridge rectifier circuit and LC filter circuits composition.
3. the isolated keep-alive circuit of plasma cut according to claim 2, which is characterized in that the current rectifying and wave filtering circuit
Output cathode connects the output of cutting machine anode, and the output negative pole of the current rectifying and wave filtering circuit connects arc maintenance output terminal.
4. the isolated keep-alive circuit of plasma cut according to claim 1, which is characterized in that the major loop is to include master
The major loop of transformer.
5. the isolated keep-alive circuit of plasma cut according to claim 4, which is characterized in that the major loop is by sequentially connecting
Main transformer, current rectifying and wave filtering circuit and the striking coil composition connect.
6. the isolated keep-alive circuit of plasma cut according to claim 5, which is characterized in that the current rectifying and wave filtering circuit by
Unidirectional full-wave bridge rectifier circuit and LC filter circuits composition.
7. the isolated keep-alive circuit of plasma cut according to claim 6, which is characterized in that the current rectifying and wave filtering circuit
Output cathode connects the output of cutting machine anode through Hall element, and the output negative pole of the current rectifying and wave filtering circuit connects cathode through striking coil
Output.
8. according to any isolated keep-alive circuits of plasma cut of claim 4-7, which is characterized in that the major loop packet
IGBT (Insulated Gate Bipolar Transistor) is included, the voltage of AC system inputs main transformer pressure again after IGBT
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720947483.5U CN207464422U (en) | 2017-08-01 | 2017-08-01 | The isolated keep-alive circuit of plasma cut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720947483.5U CN207464422U (en) | 2017-08-01 | 2017-08-01 | The isolated keep-alive circuit of plasma cut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207464422U true CN207464422U (en) | 2018-06-08 |
Family
ID=62256318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720947483.5U Expired - Fee Related CN207464422U (en) | 2017-08-01 | 2017-08-01 | The isolated keep-alive circuit of plasma cut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207464422U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109048008A (en) * | 2018-09-21 | 2018-12-21 | 苏州惠捷迦装备科技有限公司 | A kind of Full-automatic plasma cutter device |
| CN110899936A (en) * | 2020-01-15 | 2020-03-24 | 上海焊煌电气有限公司 | Circuit for detecting welding current and transferred arc current of plasma cutting machine |
-
2017
- 2017-08-01 CN CN201720947483.5U patent/CN207464422U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109048008A (en) * | 2018-09-21 | 2018-12-21 | 苏州惠捷迦装备科技有限公司 | A kind of Full-automatic plasma cutter device |
| CN110899936A (en) * | 2020-01-15 | 2020-03-24 | 上海焊煌电气有限公司 | Circuit for detecting welding current and transferred arc current of plasma cutting machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180608 Termination date: 20190801 |