CN211939444U - High-frequency arc striking circuit, device and inverter welding machine - Google Patents
High-frequency arc striking circuit, device and inverter welding machine Download PDFInfo
- Publication number
- CN211939444U CN211939444U CN202020218534.2U CN202020218534U CN211939444U CN 211939444 U CN211939444 U CN 211939444U CN 202020218534 U CN202020218534 U CN 202020218534U CN 211939444 U CN211939444 U CN 211939444U
- Authority
- CN
- China
- Prior art keywords
- circuit
- inverter
- voltage
- discharge
- frequency arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Inverter Devices (AREA)
- Arc Welding Control (AREA)
Abstract
The utility model discloses a high frequency arc striking circuit, device and contravariant welding machine, the circuit includes inverter circuit, boost circuit and discharge circuit, inverter circuit's control end receives a control signal, and converts the direct current voltage received into alternating voltage according to the control signal; the boosting circuit boosts the alternating voltage to obtain a discharge voltage; the discharge circuit receives the discharge voltage and discharges. The utility model discloses an input one and stabilize DC power supply, the high frequency high pressure that obtains does not change along with the change of net pressure, and stable output improves the striking success rate. In addition, the utility model also realizes the automatic disconnection of the high-frequency circuit by the drive control signal generated by the drive control circuit shared with the inverter welding machine, removes the switching of the relay and has long service life; the step-down transformer is removed for step-down, the circuit is simple, and the cost is lower.
Description
Technical Field
The utility model relates to an arc starting control technical field especially relates to a high frequency arc starting circuit, device and contravariant welding machine.
Background
At present, non-contact arc ignition is one of the key links for realizing non-consumable electrode argon arc welding, plasma arc welding and cutting processes, and the design of an arc ignition control circuit adopts a high-frequency and high-voltage mode. The inverter welding machine is widely applied due to the high frequency, energy conservation and easy realization of automation. When the inverter welding machine is applied to non-consumable electrode argon arc welding and plasma arc welding and cutting, the high-frequency arc initiator becomes an essential auxiliary device for the non-consumable electrode argon arc welding and the plasma arc welding and cutting because the high-frequency high-voltage breakdown is needed to ignite the electric arc in the gap between the non-consumable electrode and the workpiece.
The existing arc striking circuit mostly adopts the method of inverting the input network voltage, boosting and multiplying the inverted voltage, and generating high frequency and high voltage through LC oscillation. However, the high frequency and high voltage obtained can change along with the change of the input network voltage, and the success rate of arc striking is greatly influenced.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
A primary object of the utility model is to provide a high frequency striking circuit, device and contravariant welding machine, when aiming at striking among the solution prior art, the highly compressed output of high frequency changes along with the change of input net pressure the technical problem who changes.
In order to achieve the above object, the utility model provides a high frequency arc striking circuit, high frequency arc striking circuit includes inverter circuit, boost circuit and discharge circuit, a dc power supply is connected to inverter circuit's input, inverter circuit's output with boost circuit's input is connected, boost circuit's output with discharge circuit's input is connected, wherein:
the control end of the inverter circuit receives a control signal and converts the received direct-current voltage into alternating-current voltage according to the control signal;
the boosting circuit boosts the alternating voltage to obtain a discharge voltage;
the discharge circuit receives the discharge voltage and discharges.
Preferably, the high-frequency arc striking circuit is connected with an inverter welding machine, a control end of the inverter circuit is connected with an output end of a drive control circuit in the inverter welding machine, and the control signal is a drive control signal output by the drive control circuit to an inverter in the inverter welding machine.
Preferably, the dc power supply is a dc voltage output from the inverter welding machine.
Preferably, the inverter circuit includes a first field effect transistor, a second field effect transistor, a third field effect transistor, and a fourth field effect transistor, the first field effect transistor, the second field effect transistor, the third field effect transistor, and the fourth field effect transistor constitute an inverter bridge, an input end of the inverter bridge is connected to the dc power supply, a control end of the inverter bridge receives the control signal, and an output end of the inverter bridge is connected to an input end of the voltage boost circuit.
Preferably, the boost circuit comprises a high-voltage pack and a first capacitor, the input end of the high-voltage pack is connected with the output end of the inverter circuit, and the first capacitor is arranged between the input end of the high-voltage pack and the output end of the inverter circuit.
Preferably, the boost circuit further includes a first inductor, and the first inductor is disposed between the input end of the high voltage pack and the output end of the inverter circuit.
Preferably, the discharge circuit comprises a discharge nozzle, and the discharge nozzle is connected with the output end of the boost circuit, receives the discharge voltage, and discharges.
Preferably, the discharge nozzle is provided with a second capacitor and a second inductor in parallel, and the second capacitor and the second inductor form an oscillating circuit.
In order to achieve the above object, the present invention further provides a high frequency arc striking device, which includes the high frequency arc striking circuit as described above.
In order to achieve the above object, the utility model discloses still provide an contravariant welding machine, contravariant welding machine includes as above-mentioned high frequency arc striking device.
The utility model discloses in, constitute high frequency arc striking circuit through setting up inverter circuit, boost circuit and discharge circuit. The control end of the inverter circuit receives a control signal and converts the received direct-current voltage into alternating-current voltage according to the control signal; the boosting circuit boosts the alternating voltage to obtain a discharge voltage; the discharge circuit receives the discharge voltage and discharges. The utility model discloses an input one and stabilize DC power supply, the high frequency high pressure that obtains does not change along with the change of net pressure, and stable output improves the striking success rate. In addition, the utility model also realizes the automatic disconnection of the high-frequency circuit by the drive control signal generated by the drive control circuit shared with the inverter welding machine, removes the switching of the relay and has long service life; the step-down transformer is removed for step-down, the circuit is simple, and the cost is lower.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-frequency arc striking circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a high-frequency arc striking circuit according to an embodiment of the present invention;
the reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Inverter circuit | Q1～Q4 | First to fourth |
| 20 | Voltage booster circuit | C1～C2 | First to |
| 30 | Discharge circuit | L1～L2 | First to second inductors |
| DC | Direct current power supply | X1 | High-voltage bag |
| PWM | Control signal | Y1 | Discharge nozzle |
| PWM1～4 | First to fourth control signals |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the present invention.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a high-frequency arc striking circuit provided by an embodiment of the present invention, and fig. 2 is a schematic circuit diagram of the high-frequency arc striking circuit provided by an embodiment of the present invention.
As shown in fig. 1, in the present embodiment, the high-frequency arc striking circuit includes an inverter circuit 10, a voltage boosting circuit 20 and a discharge circuit 30, an input terminal of the inverter circuit 10 is connected to a DC power supply DC, an output terminal of the inverter circuit 10 is connected to an input terminal of the voltage boosting circuit 20, and an output terminal of the voltage boosting circuit 20 is connected to an input terminal of the discharge circuit 30, wherein:
the control end of the inverter circuit 10 receives a control signal PWM, and converts the received dc voltage into an ac voltage according to the control signal PWM.
It should be noted that, the power input of the conventional high-frequency arc striking circuit is the mains supply input, and therefore, when the mains supply input fluctuates, the generated high-frequency high voltage also fluctuates. In this embodiment, the input power source adopts stable dc auxiliary power to obtain stable high-frequency and high-voltage signals, thereby improving the success rate of arc striking. In a specific implementation, the DC power supply DC may use a separate power supply module.
In a specific implementation, the circuit schematic diagram of the inverter circuit 10 may refer to fig. 2, the inverter circuit includes a first field-effect transistor Q1, a second field-effect transistor Q2, a third field-effect transistor Q3, and a fourth field-effect transistor Q4, the first field-effect transistor Q1, the second field-effect transistor Q2, the third field-effect transistor Q3, and the fourth field-effect transistor Q4 form an inverter bridge, an input end of the inverter bridge is connected to the DC power supply DC, a control end of the inverter bridge receives the control signal, and an output end of the inverter bridge is connected to an input end of the voltage boost circuit 20.
In this embodiment, the control terminals of the inverter bridge are gates of four fets, and thus the control signals PWM are the first control signal PWM1 applied to the gate of the first fet Q1, the second control signal PWM2 applied to the gate of the second fet Q2, the third control signal PWM3 applied to the gate of the third fet Q3, and the fourth control signal PWM4 applied to the gate of the fourth fet Q4.
It can be understood that the field effect transistor is controlled to be turned on and off by the gate voltage, and the inverter bridge controls the field effect transistor according to the period to convert the received direct current voltage into the alternating current voltage, specifically: in the first period, the first field effect transistor Q1 and the fourth field effect transistor Q4 are turned on, and the second field effect transistor Q2 and the third field effect transistor Q3 are turned off; in the second period, all four field effect transistors are turned off; in the third period, the second field effect transistor Q2 and the third field effect transistor Q3 are turned on, and the first field effect transistor Q1 and the fourth field effect transistor Q4 are turned off; in the fourth period, all four field effect transistors are turned off. The first control signal PWM1, the second control signal PWM2, the third control signal PWM3 and the fourth control signal PWM4 can be implemented by a pulse modulator, which is a four-way independent and non-common pulse signal. The control circuit corresponding to the inverter bridge is the prior art and is not described herein.
The booster circuit 20 boosts the alternating voltage to obtain a discharge voltage.
In a specific implementation, referring to fig. 2, the boost circuit 20 includes a high voltage packet X1 and a first capacitor C1, an input end of the high voltage packet X1 is connected to an output end of the inverter circuit 10, and the first capacitor C1 is disposed between the input end of the high voltage packet X1 and the output end of the inverter circuit 10.
It is understood that the ac voltage output from the inverter circuit 10 is not a high voltage, and the discharge circuit 30 cannot be directly broken down into the gap. Therefore, the high voltage package X1 is used to boost the ac voltage output by the inverter circuit 10 to the discharge voltage required by the discharge circuit 30.
It is understood that, in the voltage output by the inverter bridge, there may be a dc component, and in order to ensure that the primary side of the high-voltage packet X1 is a pure ac voltage, the dc component is isolated by the first capacitor C1 in this embodiment.
In this embodiment, the boost circuit 20 further includes a first inductor L1, and the first inductor is disposed between the input end of the high voltage package X1 and the output end of the inverter circuit 10.
It should be noted that, since the discharge circuit 30 generates current after the discharge breakdown gap, the primary voltage of the high voltage packet X1 rises. The first inductor L1 is used for dividing voltage with the high-voltage package X1, so that the primary voltage of the high-voltage package is reduced, the voltage of the discharge circuit 30 is further reduced rapidly, and express high-voltage breaking is achieved.
The discharge circuit 30 receives the discharge voltage and discharges.
In the specific implementation, the discharge circuit 30 discharges by using a discharge nozzle Y1, and the discharge nozzle Y1 is directly connected with the output end of the high-voltage pack X1 to receive the high voltage output by the high-voltage pack X1 for discharging.
In addition, in this embodiment, the discharge tap Y1 is provided with a second capacitor C2 and a second inductor L2 in parallel, and the second capacitor C2 and the second inductor L2 form an oscillation circuit.
It can be understood that the boost circuit 20 outputs high voltage to charge the capacitor, the distance between the discharge nozzles Y1 determines the charging voltage and frequency across the second capacitor C2, when the voltage across the second capacitor C2 is charged to break down the air across the discharge nozzles, the second capacitor C2 starts to discharge, and simultaneously, since the current on the second inductor L2 cannot suddenly change, a high-frequency high-voltage signal is instantaneously generated across the two terminals.
The utility model discloses in, constitute high frequency arc striking circuit through setting up inverter circuit 10, boost circuit 20 and discharge circuit 30. The control end of the inverter circuit 10 receives a control signal and converts the received dc voltage into ac voltage according to the control signal; the boosting circuit 20 boosts the alternating voltage to obtain a discharge voltage; the discharge circuit 30 receives the discharge voltage and discharges. The utility model discloses an input one and stabilize DC power supply, the high frequency high voltage that obtains does not change along with input voltage's change, and stable output improves the striking success rate.
With continued reference to fig. 1 and 2, a second embodiment is also presented.
The high-frequency arc striking circuit comprises an inverter circuit 10, a booster circuit 20 and a discharge circuit 30, wherein an input end of the inverter circuit 10 is connected with a direct current power supply DC, an output end of the inverter circuit 10 is connected with an input end of the booster circuit 20, an output end of the booster circuit 20 is connected with an input end of the discharge circuit 30, and the high-frequency arc striking circuit comprises:
the control end of the inverter circuit 10 receives a control signal PWM, and converts the received dc voltage into an ac voltage according to the control signal PWM;
the boosting circuit 20 boosts the alternating voltage to obtain a discharge voltage;
the discharge circuit 30 receives the discharge voltage and discharges.
In this embodiment, the high-frequency arc striking circuit is connected to an inverter welding machine, a control end of the inverter circuit 10 is connected to an output end of a driving control circuit in the inverter welding machine, and the control signal PWM is a driving control signal output by the driving control circuit to an inverter in the inverter welding machine.
In the conventional high-frequency arc striking device, a relay cuts off a high frequency, a high-frequency current exists in a loop, the relay is easily damaged, and the service life is short. The embodiment can realize automatic high frequency interruption, and has contactless switching and long service life.
It should be noted that the inverter welding machine includes an inverter therein, and the inverter is controlled by a driving control signal output by a driving control circuit in the inverter welding machine. The driving control circuit adopts feedback control, and controls the voltage output by the inverter by collecting the current of the welding device. In this embodiment, the high-frequency arc striking circuit and the inverter welding machine share the driving control circuit, that is, when the pulse width of the driving control signal output by the driving control circuit changes, the voltages output by the inverter and the inverter circuit 10 both change.
In a specific implementation, the PWM signal output by the driving control circuit in the inverter welding machine controls the inverter circuit 10 to convert the received dc voltage into an ac voltage, and the booster circuit 20 boosts the ac voltage to obtain a discharge voltage. In the no-load state, that is, when the gap between the non-melting electrode and the workpiece is not broken down, the PWM signal has a large pulse width, and at this time, the voltage of the discharge voltage discharge circuit 30 is just the voltage required for breaking down the gap, so that a high-frequency high-voltage signal can be generated. After the gap is punctured, current is generated between the non-melting electrode and the workpiece, the driving control circuit is subjected to feedback regulation, and the pulse width is narrowed. Therefore, the pulse width of the control signal PWM received by the inverter circuit 10 is also narrowed, the output voltage of the inverter circuit 10 is decreased, the voltage of the discharge circuit 30 is decreased, and the air cannot be broken, so that the high frequency is automatically turned off.
In addition, since the inverter welding machine rectifies the ac input of the utility power to obtain a DC voltage, in this embodiment, the DC power supply DC may also be a DC voltage output by the inverter welding machine.
The utility model removes the switching of the relay, and has long service life; the step-down transformer is removed for step-down, and the drive control circuit driven by the welding machine is shared, so that the circuit is simple, and the cost is lower.
In order to achieve the above object, the present invention further provides a high frequency arc striking device, which includes the high frequency arc striking circuit as described above. The specific structure of the high-frequency arc striking circuit refers to the above embodiments, and since the device adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
In order to achieve the above object, the utility model discloses still provide an contravariant welding machine, contravariant welding machine includes as above-mentioned high frequency arc striking device. The specific structure of the high-frequency arc striking device refers to the above embodiments, and since the inverter welding machine adopts all the technical solutions of all the above embodiments, all the beneficial effects brought by the technical solutions of the above embodiments are at least achieved, and are not repeated herein.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A high-frequency arc ignition circuit, characterized in that the high-frequency arc ignition circuit comprises: inverter circuit, boost circuit and discharge circuit, a DC power supply is connected to inverter circuit's input, inverter circuit's output with boost circuit's input is connected, boost circuit's output with discharge circuit's input is connected, wherein:
the control end of the inverter circuit receives a control signal and converts the received direct-current voltage into alternating-current voltage according to the control signal;
the boosting circuit boosts the alternating voltage to obtain a discharge voltage;
the discharge circuit receives the discharge voltage and discharges.
2. The high-frequency arc striking circuit according to claim 1, wherein the high-frequency arc striking circuit is connected with an inverter welding machine, a control end of the inverter circuit is connected with an output end of a drive control circuit in the inverter welding machine, and the control signal is a drive control signal output by the drive control circuit to an inverter in the inverter welding machine.
3. The high frequency arc striking circuit according to claim 2, wherein said dc power source is a dc voltage outputted from said inverter welder.
4. The high-frequency arc striking circuit according to claim 1, wherein the inverter circuit comprises a first field effect transistor, a second field effect transistor, a third field effect transistor and a fourth field effect transistor, the first field effect transistor, the second field effect transistor, the third field effect transistor and the fourth field effect transistor form an inverter bridge, an input end of the inverter bridge is connected to the dc power supply, a control end of the inverter bridge receives the control signal, and an output end of the inverter bridge is connected to an input end of the voltage boosting circuit.
5. The high-frequency arc striking circuit according to claim 1, wherein the boost circuit comprises a high-voltage pack and a first capacitor, wherein an input end of the high-voltage pack is connected with an output end of the inverter circuit, and the first capacitor is arranged between the input end of the high-voltage pack and the output end of the inverter circuit.
6. The high frequency arc striking circuit according to claim 5, wherein said boost circuit further comprises a first inductor disposed between said high voltage packet input terminal and said inverter circuit output terminal.
7. The high-frequency arc ignition circuit according to claim 1, wherein the discharge circuit includes a discharge nozzle connected to an output terminal of the booster circuit, receives the discharge voltage, and performs discharge.
8. The high-frequency arc striking circuit according to claim 7, wherein said discharge nozzle is provided with a second capacitor and a second inductor in parallel, said second capacitor and said second inductor forming an oscillating circuit.
9. A high-frequency arc ignition device, characterized in that it comprises a high-frequency arc ignition circuit according to any one of claims 1 to 8.
10. An inverter welder, characterized in that it comprises a high-frequency arc starting device according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020218534.2U CN211939444U (en) | 2020-02-26 | 2020-02-26 | High-frequency arc striking circuit, device and inverter welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020218534.2U CN211939444U (en) | 2020-02-26 | 2020-02-26 | High-frequency arc striking circuit, device and inverter welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211939444U true CN211939444U (en) | 2020-11-17 |
Family
ID=73195221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020218534.2U Active CN211939444U (en) | 2020-02-26 | 2020-02-26 | High-frequency arc striking circuit, device and inverter welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211939444U (en) |
-
2020
- 2020-02-26 CN CN202020218534.2U patent/CN211939444U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103222344B (en) | High intensity light source | |
| EP1157772A3 (en) | Power supply for electric arc welding | |
| JPH06260291A (en) | Lighting circuit for vehicle discharge lamp | |
| CN101112732B (en) | Power supply apparatus for welder | |
| US20200153342A1 (en) | Power conversion apparatus | |
| CN104253544B (en) | A kind of compensation circuit of Switching Power Supply control chip | |
| JPH09172788A (en) | Discharge current supply method and discharge current supply device | |
| CN211939444U (en) | High-frequency arc striking circuit, device and inverter welding machine | |
| CN203245482U (en) | High-frequency arc starting circuit with direct-current voltage output | |
| CN103111719B (en) | High frequency arc ignition circuit with direct current voltage output | |
| EP3273589A1 (en) | Power supply system | |
| CN217563528U (en) | Novel plasma power supply arcing control circuit | |
| CN107538106A (en) | Welding machine arc-maintaining device | |
| CN109756120B (en) | A train that is used for safe power of train and has it | |
| KR970032299A (en) | Electronic ballast circuit | |
| CN216565097U (en) | Nanosecond high-voltage pulse generator | |
| CN100418029C (en) | Switching controller with outputting-power limitation and low-voltage protection | |
| CN113427104A (en) | High-frequency arc striking and maintaining circuit for argon arc welding machine | |
| US20070007905A1 (en) | Low frequency triggered electronic ballast | |
| CN202963766U (en) | Plasma gouging high-frequency circuit and plasma gouging torch comprising same | |
| JPS63309373A (en) | Arc welding source | |
| JP2010104076A (en) | Power converter circuit | |
| JPH0779505A (en) | Output controller of dc-dc converter for electric vehicle | |
| CN213782893U (en) | Pulse charging circuit | |
| CN210254656U (en) | Plasma cutting machine arc striking circuit for inhibiting high-frequency interference and harmonic waves |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518133 floor 501 (4-5), building B, Feiyang science and Technology Innovation Park, No.8, Longchang Road, 67 District, Xingdong community, Xin'an street, Bao'an District, Shenzhen City, Guangdong Province:No.4 factory building, Fenghuang fourth industrial zone, Fenghuang community, Fuyong street, Bao'an District, Shenzhen City) 518133 Room 501, building B, Feiyang science and Technology Innovation Park, No.8, Longchang Road, 67 District, Xingdong community, Xin'an street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Ruiling Industrial Group Co.,Ltd. Address before: Room 207, unit C, building A3, China Merchants Science Park, 3009 sightseeing Road, Guangming New District, Shenzhen, Guangdong 518103:2-6 / F, building B, Feiyang industrial technology plant, Liuxian 2nd Road, Xin'an street, Bao'an District, Shenzhen) 518103 room 207, unit C, building A3, China Merchants Science Park, 3009 sightseeing Road, Guangming New District, Shenzhen, Guangdong Province Patentee before: SHENZHEN RILAND INDUSTRY Co.,Ltd. |