CN106891075B - Control inverter type welder arc ignition system and its working method - Google Patents
Control inverter type welder arc ignition system and its working method Download PDFInfo
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- CN106891075B CN106891075B CN201710039814.XA CN201710039814A CN106891075B CN 106891075 B CN106891075 B CN 106891075B CN 201710039814 A CN201710039814 A CN 201710039814A CN 106891075 B CN106891075 B CN 106891075B
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- 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
- B23K9/00—Arc welding or cutting
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/067—Starting the arc
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- 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
- B23K9/00—Arc welding or cutting
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
- B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The invention discloses a kind of control inverter type welder arc ignition system and its working methods, the system includes: arc welding gun switch control circuit, including the 1 118 resistance, 1 119 resistance, 220th resistance, 221st resistance, 222nd resistance, 1 117 capacitor, 1 118 capacitor, 6th optocoupler, 4th voltage comparator, second relay, second relay is in parallel with the 1 118 capacitor, 1 118 capacitor is connected with the 221st resistance, 221st resistance is connected with the 6th optocoupler second pin, 1 118 capacitor is connected with the 1 118 resistance, 1 118 resistance is connected with the 222nd resistance, 222nd resistance is connected with the 4th voltage comparator second pin.The present invention uses the pwm pulse of PWM modulation unit output, the different in width in unloaded and welding, and high-frequency high-voltage arc striking is started and closed after signal processing, to realize the control to arc initiation device.
Description
Technical field
The present invention relates to a kind of control system and its working methods, more particularly to a kind of control inverter type welder arc ignition system
And its working method.
Background technique
Inverter argon arc welding machine and plasma cutting machine need to increase a high-frequency arc strike device and carry out the starting the arc, pass through welding gun
On the switch control starting the arc, need to cut off this high-frequency high-voltage arc striking after forming welding current.Inversion argon arc at present
Welding machine and cutting machine are to judge to cut off high-frequency and high-voltage striking by detection welding arc voltage or detection welding circuit electric current
Device, both detection modes need signal isolation to handle.If using linear optical coupling, current divider or current Hall sensor
Then circuit is cumbersome, signal interference weight reliability is low, circuit cost is high.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of control inverter type welder arc ignition system and its working method,
The pwm pulse exported using PWM modulation unit draws high-frequency and high-voltage after the unloaded different in width with when welding, signal processing
The starting of arc device and closing, to realize the control to arc initiation device.
The present invention is to solve above-mentioned technical problem by following technical proposals: a kind of control inverter type welder arc ignition system
Include:
Arc welding gun switch control circuit, including the 1 118 resistance, the 1 119 resistance, the 220th resistance,
221 resistance, the 222nd resistance, the 1 117 capacitor, the 1 118 capacitor, the 6th optocoupler, the 4th electricity
Comparator, the second relay are pressed, the second relay is in parallel with the 1 118 capacitor, the 1 118 capacitor and the 220th
One resistance is connected, and the 221st resistance is connected with the 6th optocoupler second pin, the 1 118 capacitor and 1 118
Resistance is connected, and the 1 118 resistance is connected with the 222nd resistance, and the 222nd resistance is compared with the 4th voltage
The series connection of device second pin, the 4th voltage comparator third pin is connected with the 1 117 capacitor, the 1 117 capacitor and the
219 resistor coupled in parallel, the 1 119 resistance are connected with the 220th resistance, the 6th optocoupler third pin ground connection, and the 6th
The first pin of optocoupler is connected with the 1 118 resistance；
Pwm pulse width comparison circuit, including the 1 114 capacitor, the 1 115 capacitor, the 226th electricity
Resistance, the 227th resistance, the 228th resistance, the 230th resistance, the 1 111 diode, the 4th voltage
Comparator, the 5th pin of the 4th voltage comparator successively with the 226th resistance, the 1 111 Diode series, the 4th
The 6th pin of voltage comparator is connected with the 228th resistance, the 226th resistance and the 1 114 capacitor phase
Even, the 1 114 capacitor and the 227th resistor coupled in parallel, the 228th resistance are connected with the 1 115 capacitor,
1 115 capacitor and the 230th resistor coupled in parallel；
Control arc initiation device circuit, including the 1 111 resistance, the 1 112 resistance, the 1 114 resistance, the
215 resistance, the 202nd triode, the 207th diode and door, third relay, with 12 pin of the family status
Successively it is connected with the 1 112 resistance, the 7th pin of the 4th voltage comparator, with 13 pin of the family status successively with 1 110
One resistance, the 4th the first pin of voltage comparator are connected, and are connected with 11 pin of the family status with the 1 114 resistance, and 1 110
Four resistance are connected with the 1 115 resistance, the 1 114 resistance and the 1 115 resistance all with the 202nd triode
Base stage is connected, and the 202nd transistor emitter ground connection, the 202nd transistor collector is connected with third relay, the
Three relays and the 207th diodes in parallel；
PI adjusts circuit, including the 21st capacitor, the 24th capacitor, the 34th resistance, the 36th resistance, the
39 resistance, the 19th diode, the 20th diode, operational amplifier, first the first pin of chip, the 6th optocoupler the 4th
Pin is all connected with the 36th resistance, the 36th resistance successively with the 20th diode, the 19th Diode series, the tenth
Nine diodes and the 34th resistor coupled in parallel, the 34th resistance are connected with the 24th capacitor, the 24th capacitor and second
11 capacitors are in parallel, and the 21st capacitor is connected with the 39th resistance, the 7th pin of operational amplifier and the 39th resistance
It is connected, the 39th resistance is connected with the 21st capacitor；
Pwm pulse width modulation circuit, including the first chip, first resistor, first capacitor, the second capacitor, the first chip
8th pin is connected with the second capacitor, and the 5th pin of the first chip ground connection, first the first pin of chip draws with the 6th optocoupler the 4th
Foot is connected, and the first chip second pin ground connection, first resistor, first capacitor are all connected with the 4th pin of the first chip, the first electricity
Resistance, first capacitor series connection.
Preferably, the arc welding gun switch control circuit, pwm pulse width comparison circuit all connect with control arc initiation device circuit
It connects, arc welding gun switch control circuit, PI adjust circuit and connect with pwm pulse width modulation circuit.
The present invention also provides a kind of working methods for controlling inverter type welder arc ignition system comprising following steps:
Step 1 releases the pulse to pwm pulse width modulation circuit by arc welding gun switch triggering arc welding gun switch control circuit
Locking, while another way is sent to control arc initiation device circuit；
Step 2, pwm pulse width modulation circuit generate pwm pulse maximum pulse width and send to pwm pulse width comparison circuit,
Compared with a reference value that pwm pulse width comparison circuit sets pwm pulse processing with one, send greater than output after a reference value to control
Arc initiation device circuit processed；
Step 3, the signal of Butt welding gun ON-OFF control circuit and pwm pulse width compare control arc initiation device circuit simultaneously
Start high-frequency high-voltage arc striking after the signal processing of circuit；
Step 4 is sent after having welding current If to send to PI adjusting circuit and given value Ig progress operation adjusting after striking success
To pwm pulse width modulation circuit；
Step 5, pulsewidth is adjusted in pwm pulse width modulation circuit narrow after send it is more electric to pwm pulse width
Road；
Step 6, pwm pulse width comparison circuit handles compared with a reference value of setting modulated pwm pulse, small
It is not exported after a reference value and gives control arc initiation device circuit；
Step 7, control arc initiation device circuit lack the output of pwm pulse width comparison circuit, and it is high that high frequency is closed after processing
Press arc initiation device.
The positive effect of the present invention is that: the present invention uses the pwm pulse of PWM modulation unit output, unloaded and
Different in width when welding starts and closes to high-frequency high-voltage arc striking after signal processing, to realize to arc initiation device
Control.
Detailed description of the invention
Fig. 1 is the block flow diagram of present invention control inverter type welder arc ignition system and its working method.
Fig. 2 is circuit diagram of the invention.
Specific embodiment
Present pre-ferred embodiments are provided with reference to the accompanying drawing, in order to explain the technical scheme of the invention in detail.
As shown in Figure 1 to Figure 2, it includes arc welding gun switch control circuit 1, PWM arteries and veins that the present invention, which controls inverter type welder arc ignition system,
It rushes width comparison circuit 2, control arc initiation device circuit 3, PI and adjusts circuit 4, pwm pulse width modulation circuit 5, in which:
Arc welding gun switch control circuit 1 includes the 1 118 resistance R218, the 1 119 resistance R219, the 220th
Resistance R220, the 221st resistance R221, the 222nd resistance R222, the 1 117 capacitor C217, the 200th
18 capacitor C218, the 6th optocoupler U6, the 4th voltage comparator U4A, the second relay K2B, the second relay K2B and the 200th
18 capacitor C218 are in parallel, and the 1 118 capacitor C218 is connected with the 221st resistance R221, the 221st electricity
Resistance R221 is connected with the 6th optocoupler U6 second pin, and the 1 118 capacitor C218 is connected with the 1 118 resistance R218, the
220 resistance R220 are connected with the 222nd resistance R222, and the 222nd resistance R222 is compared with the 4th voltage
The series connection of device U4A second pin, the 4th voltage comparator U4A third pin are connected with the 1 117 capacitor C217, and 1 110
Seven capacitor C217 are in parallel with the 1 119 resistance R219, the 1 119 resistance R219 and the 220th resistance R220 phase
Even, the 6th optocoupler U6 third pin ground connection, the 6th the first pin of optocoupler U6 are connected with the 1 118 resistance R218；
Working principle: the 6th optocoupler, the 221st resistance, the 1 118 resistance built-up circuit are to the of UC3845
1 foot drags down block；4th voltage comparator is LM258, the 4th voltage comparator, the 1 119 resistance, the 1 118 electricity
Appearance, the 222nd resistance, the 220th resistance, the 1 119 resistance, the 1 117 capacitor, the second relay group
At comparator；Second relay is the relay of welding gun control, and the cut-off of the 6th optocoupler releases after the second relay, which triggers, to be closed
Output block to pwm pulse width modulation circuit, while comparator reverse input end voltage is lower than noninverting input, comparator
Output voltage U2 gives control arc initiation device circuit.
Pwm pulse width comparison circuit 2 includes the 1 114 capacitor C214, the 1 115 capacitor C215, the 200th
26 resistance R226, the 227th resistance R227, the 228th resistance R228, the 230th resistance R230,
1 111 diode D211, the 4th voltage comparator U4B, the 5th pin of the 4th voltage comparator U4B is successively with the 200th
26 resistance R226, the 1 111 diode D211 series connection, the 6th pin of the 4th voltage comparator U4B and the 220th
Eight resistance R228 are connected, and the 226th resistance R226 is connected with the 1 114 capacitor C214, the 1 114 capacitor
C214 is in parallel with the 227th resistance R227, and the 228th resistance R228 is connected with the 1 115 capacitor C215,
1 115 capacitor C215 is in parallel with the 230th resistance R230；
Working principle: the 4th voltage comparator is LM258, the 4th voltage comparator, the 1 111 diode, the 200th
26 resistance, the 1 114 electricity, the 227th resistance, the 228th resistance, the 230th resistance, second
A hundred or so five capacitor constitutes voltage comparator.Pwm pulse width modulation circuit send to PWM by the 1 111 diode rectification
226th resistance, the 227th electric resistance partial pressure, after the 1 114 capacitor filtering with the 228th resistance,
The reference voltage that 230th resistance, the 1 115 capacitance partial pressure form compares, and exports electricity if it is greater than reference voltage
U1 is pressed to give control arc initiation device circuit.
Controlling arc initiation device circuit 3 includes the 1 111 resistance R211, the 1 112 resistance R212,1 114
Resistance R214, the 1 115 resistance R215, the 202nd triode Q202, the 207th diode D207 and door
U5D, third relay K3B, with the 12nd pin of door U5D successively with the 1 112 resistance R212, the 4th voltage comparator U4B
7th pin be connected, with the 13rd pin of door U5D successively with the 1 111 resistance R211, the 4th voltage comparator U4A first
Pin is connected, and is connected with the 11st pin of door U5D with the 1 114 resistance R214, the 1 114 resistance R214 and the 200th
15 resistance R215 series connection, the 1 114 resistance R214 and the 1 115 resistance R215 all with the 202nd triode
Q202 base stage is connected, the 202nd triode Q202 emitter ground connection, the 202nd triode Q202 collector and third
Relay K3B series connection, third relay K3B are in parallel with the 207th diode D207；
Working principle: being CD4081, U5D, the 1 112 resistance, the 1 111 resistance, the 1 114 electricity with door
Resistance, the 1 115 resistance, the 202nd triode, the 207th diode and third relay composition control striking dress
Circuits.When arc welding gun switch control circuit 1 and pwm pulse width comparison circuit send to voltage U2, U1 be high level then U5D is defeated
High level out, the 202nd triode obtain electric positive bias conducting, and third relay is attracted, and connect high-frequency and high-voltage striking dress at this time
It sets, starts striking.
It includes the 21st capacitor C21, the 24th capacitor C24, the 34th resistance that PI (proportional integration), which adjusts circuit 4,
R34, the 36th resistance R36, the 39th resistance R39, the 19th diode D19, the 20th diode D20, operation amplifier
Device U3B, first the first pin of chip U1, the 4th pin of the 6th optocoupler U6 are all connected with the 36th resistance R36, the 36th electricity
Resistance R36 successively connects with the 20th diode D20, the 19th diode D19, the 19th diode D19 and the 34th resistance
R34 is in parallel, and the 34th resistance R34 is connected with the 24th capacitor C24, the 24th capacitor C24 and the 21st capacitor C21
Parallel connection, the 21st capacitor C21 are connected with the 39th resistance R39, the 7th pin of operational amplifier U3B and the 39th resistance
R39 is connected, and the 39th resistance R39 is connected with the 21st capacitor C21；
Working principle: operational amplifier MC33074D, operational amplifier, the 24th capacitor, the 34th resistance,
21 capacitors, the 20th diode, the 19th diode, the 36th resistance, the 39th resistance composition integral
(PI) adjuster, welding current given value Ig are sent to the noninverting input of operational amplifier, and welding current value of feedback If is sent to fortune
The inverse output terminal of amplifier is calculated, the operation result of adjuster is sent to pwm pulse width modulation circuit.
Pwm pulse width modulation circuit 5 includes the first chip U1, first resistor R01, first capacitor C1, the second capacitor C2,
The 8th pin of first chip U1 is connected with the second capacitor C2, the 5th pin of the first chip U1 ground connection, first the first pin of chip U1
It is connected with the 4th pin of the 6th optocoupler U6, the first chip U1 second pin ground connection, first resistor R01, first capacitor C1 are with the
The 4th pin of one chip U1 is connected, first resistor R01, first capacitor C1 series connection.
Working principle: the first chip is PWM chip UC3845, the first chip, first resistor, first capacitor, the second capacitor
The pwm pulse for forming fixed frequency lifts a blockade to it since welding gun is closed arc welding gun switch control circuit, at this time welding electric current
If, which does not establish PI and adjusts circuit, does not influence pwm pulse width modulation circuit, thus export the pulse PWM an of maximum pulse width to
Pwm pulse width comparison circuit.
Working principle of the present invention: the COMP port voltage of pwm pulse width modulation circuit reduces output PWM pulsewidth and narrows,
The a reference value set after the circuit filtering of pwm pulse width comparison circuit partial pressure lower than pwm pulse width comparison circuit,
Pwm pulse width comparison circuit not output voltage U1.Control arc initiation device circuit lacks the defeated of pwm pulse width comparison circuit
Out, it is not turned on door U5D output low level triode Q202, relay electric-loss disconnects high-frequency high-voltage arc striking at this time.
Arc welding gun switch control circuit 1, pwm pulse width comparison circuit 2 are all connect with control arc initiation device circuit 3, welding gun
ON-OFF control circuit 1, PI adjust circuit 4 and connect with pwm pulse width modulation circuit 5 so that it is convenient to connect.
As shown in Figure 1, the present invention controls the working method of inverter type welder arc ignition system comprising following steps:
Step 1 releases the pulse to pwm pulse width modulation circuit by arc welding gun switch triggering arc welding gun switch control circuit
Locking, while another way is sent to control arc initiation device circuit；
Step 2, pwm pulse width modulation circuit generate pwm pulse maximum pulse width and send to pwm pulse width comparison circuit,
Compared with a reference value that pwm pulse width comparison circuit sets pwm pulse processing with one, send greater than output after a reference value to control
Arc initiation device circuit processed；
Step 3, the signal of Butt welding gun ON-OFF control circuit and pwm pulse width compare control arc initiation device circuit simultaneously
Start high-frequency high-voltage arc striking after the signal processing of circuit；
Step 4 is sent after having welding current If to send to PI adjusting circuit and given value Ig progress operation adjusting after striking success
To pwm pulse width modulation circuit；
Step 5, pulsewidth is adjusted in pwm pulse width modulation circuit narrow after send it is more electric to pwm pulse width
Road；
Step 6, pwm pulse width comparison circuit handles compared with a reference value of setting modulated pwm pulse, small
It is not exported after a reference value and gives control arc initiation device circuit；
Step 7, control arc initiation device circuit lack the output of pwm pulse width comparison circuit, and it is high that high frequency is closed after processing
Press arc initiation device.
The invention is characterized in that reflecting arc voltage height by the pwm pulse width different in unloaded and welding and having
Welding electric current controls the opening and closing of arc initiation device to realize.
Particular embodiments described above, the technical issues of to solution of the invention, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to
The present invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (3)
1. a kind of control inverter type welder arc ignition system, characterized in that it comprises:
Arc welding gun switch control circuit, including the 1 118 resistance, the 1 119 resistance, the 220th resistance, the 200th
21 resistance, the 222nd resistance, the 1 117 capacitor, the 1 118 capacitor, the 6th optocoupler, the 4th voltage ratio
Compared with device U4A, the second relay, the second relay both ends are connected with the 1 118 capacitor both ends respectively, the 1 118 capacitor
One end is connected with the 222nd resistance one end, the 1 118 capacitor other end and the 221st resistance other end phase
Even, the 221st resistance one end is connected with the 6th optocoupler second pin, 1 118 capacitor one end and 1 118
Resistance one end is connected, and the 1 118 resistance other end is connected with VCC, the 220th resistance other end and the 222nd
The resistance other end is connected, and the 220th resistance one end is connected with VCC, the 222nd resistance other end and the 4th voltage ratio
It is connected compared with device U4A inverting input terminal, the 4th voltage comparator U4A non-inverting input terminal is connected with 1 117 capacitor one end, the
217 capacitor both ends are connected with the 1 119 resistance both ends respectively, 1 119 resistance one end and the 220th electricity
It hinders the other end to be connected, the 6th optocoupler third pin, the 1 119 resistance other end, the 1 118 capacitor other end all connect
Ground, the 6th the first pin of optocoupler are connected with 1 118 resistance one end, the 222nd resistance one end；
Pulse width compares circuit, including the 1 114 capacitor, the 1 115 capacitor, the 226th resistance, second
127 resistance, the 228th resistance, the 230th resistance, the 1 111 diode, the 4th voltage comparator
U4B, the 4th voltage comparator U4B non-inverting input terminal are connected with the 226th resistance other end, the 226th resistance
One end is connected with the 1 111 diode cathode, and the 1 111 diode cathode is connected with pwm pulse maximum pulse width, and the 4th
Voltage comparator U4B inverting input terminal is connected with the 228th resistance one end, the 226th resistance other end of and
The 214 capacitor other ends are connected, and 1 114 capacitor one end ground connection, the 1 114 capacitor both ends are respectively with the 200th
27 resistance both ends are connected, and the 228th resistance one end is connected with 1 115 capacitor one end, the 1 115 electricity
Hold both ends to be connected with the 230th resistance both ends；
Control arc initiation device circuit, including the 1 111 resistance, the 1 112 resistance, the 1 114 resistance, the 200th
15 resistance, the 202nd triode, the 207th diode and door, third relay, with one input terminal of door and second
A hundred or so two resistance one end is connected, and the 1 112 resistance other end is connected with the 4th voltage comparator U4B output end, another with door
Input terminal is successively connected with 1 111 resistance one end, the 4th voltage comparator U4A output end, with gate output terminal and the 200th
14 resistance one end are connected, and the 1 114 resistance other end is connected with 1 115 resistance one end, the 1 114 resistance
The other end, 1 115 resistance one end are all connected with the 202nd transistor base, the 202nd transistor emitter,
The 1 115 resistance other end is all grounded, and the 202nd transistor collector is connected with the third relay other end, third
Relay both ends are connected with the 207th diode cathode, cathode respectively, and third relay one end is connected with VCC；
PI adjusts circuit, including the 21st capacitor, the 24th capacitor, the 34th resistance, the 36th resistance, the 30th
Nine resistance, the 19th diode, the 20th diode, operational amplifier, first the first pin of chip, the 4th pin of the 6th optocoupler
All it is connected with the 36th resistance one end, the 36th resistance other end is connected with the 20th diode cathode, the 22nd pole
Pipe cathode is connected with the 19th diode cathode, and the 19th diode cathode is connected with the 34th resistance other end, and the 30th
Four resistance one end are connected with the 24th capacitor other end, and the 24th capacitor one end is connected with the 21st capacitor one end, the
21 capacitor one end are connected with the 39th resistance one end, and operational amplifier output terminal is connected with the 39th resistance one end,
39th resistance other end ground connection；
Pwm pulse width modulation circuit, including the first chip, first resistor, first capacitor, the second capacitor, the first chip the 8th
Pin is connected with the second capacitor other end, and second capacitor one end, the 5th pin of the first chip are all grounded, first the first pin of chip
It is connected with the 4th pin of the 6th optocoupler, the first chip second pin ground connection, the first resistor other end, first capacitor one end are all with the
The 4th pin of one chip is connected, and the first resistor other end is connected with first capacitor one end, and first resistor one end is connected with Vref, the
One capacitor other end ground connection.
2. control inverter type welder arc ignition system according to claim 1, which is characterized in that the arc welding gun switch control electricity
All with control arc initiation device circuit connection, arc welding gun switch control circuit, PI adjust circuit for road, pwm pulse width comparison circuit
It is connect with pwm pulse width modulation circuit.
3. it is a kind of control inverter type welder arc ignition system working method, which is characterized in that itself the following steps are included:
Step 1 releases the pulse to pwm pulse width modulation circuit by arc welding gun switch triggering arc welding gun switch control circuit and locks,
Another way is sent to control arc initiation device circuit simultaneously；
Step 2, pwm pulse width modulation circuit generate pwm pulse maximum pulse width and pwm pulse maximum pulse width are sent to PWM
Pulse width compares circuit, compared with a reference value that pwm pulse width comparison circuit sets pwm pulse maximum pulse width with one,
It send greater than output after a reference value to control arc initiation device circuit；
Step 3, the signal and pwm pulse width comparison circuit of control arc initiation device circuit while Butt welding gun ON-OFF control circuit
Signal processing after start high-frequency high-voltage arc striking；
Step 4, have after striking success welding current If send to PI adjust circuit and given value Ig send after operation adjusting to
Pwm pulse width modulation circuit；
Step 5, pulsewidth is adjusted in pwm pulse width modulation circuit narrow after send to pwm pulse width comparison circuit；
Step 6, pwm pulse width comparison circuit are compared modulated pwm pulse with a reference value of setting, are less than base
It is not exported after quasi- value and gives control arc initiation device circuit；
Step 7, control arc initiation device circuit lack the output of pwm pulse width comparison circuit, and high-frequency and high-voltage is closed after processing and is drawn
Arc device.
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| CN201710039814.XA CN106891075B (en) | 2017-01-19 | 2017-01-19 | Control inverter type welder arc ignition system and its working method |
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| CN201710039814.XA CN106891075B (en) | 2017-01-19 | 2017-01-19 | Control inverter type welder arc ignition system and its working method |
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| CN106891075B true CN106891075B (en) | 2019-07-12 |
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| CN110340488B (en) * | 2019-06-01 | 2021-02-09 | 上海沪工焊接集团股份有限公司 | Lifting arc striking control method of inverter welding machine |
| CN111478614B (en) * | 2020-04-20 | 2023-08-01 | 四川泛华航空仪表电器有限公司 | Low electromagnetic interference high reliable jet ignition power supply |
| CN114932299B (en) * | 2022-05-30 | 2024-05-03 | 上海米勒焊接设备有限公司 | Cutting arc voltage detection circuit of plasma cutting machine |
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| Publication number | Publication date |
|---|---|
| CN106891075A (en) | 2017-06-27 |
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