CN108296605B - Welder for outputting alternating current or direct current - Google Patents
Welder for outputting alternating current or direct current Download PDFInfo
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- CN108296605B CN108296605B CN201810216242.2A CN201810216242A CN108296605B CN 108296605 B CN108296605 B CN 108296605B CN 201810216242 A CN201810216242 A CN 201810216242A CN 108296605 B CN108296605 B CN 108296605B
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- 208000037516 chromosome inversion disease Diseases 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims description 62
- 239000003990 capacitor Substances 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification 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
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The invention discloses a welder for outputting alternating current or direct current, which comprises: an input voltage, a direct current rectification output unit, the input voltage forming a direct current output through the direct current rectification output unit; a control unit for outputting a DC/AC control signal according to the input signal; and the output waveform switching unit outputs a direct current driving signal or an alternating current driving signal according to the direct current/alternating current control signal, and is connected with the direct current rectifying output unit and the secondary inversion unit.
Description
Technical Field
The invention relates to the technical field of welding machines, in particular to a welding machine capable of outputting alternating current or direct current and realizing various welding functions.
Background
The electric welder is a device which uses the high-temperature arc generated by the instant short circuit of the positive electrode and the negative electrode to melt the welding flux on the welding electrode and the welded material, so as to combine the contacted materials. A welder is an indispensable tool in industrial manufacturing, and is mainly used for generating atomic bonding of two separated metal objects to be connected into a whole. The welding machines commonly used in the market at present mainly comprise the following types: (1) classifying from the output types: the welding machine can be divided into a direct current welding machine and an alternating current welding machine; (2) categorize from the use of the welder: the method can be divided into manual welding, argon arc welding and gas shielded welding. Most of the current welding machines are direct current welding machines (a welding mode is adopted in most of the current welding machines, and a combination of two or three types is adopted in the minority of the current welding machines) or alternating current argon arc welding machines.
With the development of industry, the conventional welding machine cannot meet the market demand, and more demands of users are that one welding machine can realize multiple welding functions, so that different welding demands can be met by switching functions in different welding occasions instead of replacing different welding machine types. The welding machine comprehensively considers the above factors, adopts an advanced welding power supply technology, combines direct current manual welding, argon arc welding, gas shield welding and alternating current gas shield welding into one, and can realize various welding through the switching of the control end, thereby ensuring the intelligent integration of the welding machine.
Disclosure of Invention
In view of the above, the present invention provides a welding machine, which can selectively output direct current or alternating current by a user, and can be combined with various welding modes to realize the requirement of multifunctional welding.
In order to achieve the above object, the present invention discloses a welder for outputting alternating current or direct current, comprising: an input voltage, a direct current rectification output unit, the input voltage forming a direct current output through the direct current rectification output unit; a control unit for outputting a DC/AC control signal according to the input signal; and the output waveform switching unit outputs a direct current driving signal or an alternating current driving signal according to the direct current/alternating current control signal, and is connected with the direct current rectifying output unit and the secondary inversion unit.
Further, the input voltage is 110V or 220V ac voltage.
Further, the direct current rectifying output unit comprises a bridge rectifying unit, a power factor correcting unit, a full-bridge inversion unit and an output rectifying unit.
Furthermore, the control unit comprises a control panel and a singlechip, and the singlechip converts an input signal of the control panel into the direct current/alternating current control signal.
Further, the output waveform switching unit comprises a triode, a relay and an alternating current driving unit; when the input signal is a direct current control signal, the triode is conducted, the relay is attracted, and the output waveform switching unit outputs a direct current driving signal; when the input signal is an alternating current control signal, the triode is not conducted, the relay is not attracted, and the alternating current driving unit outputs an alternating current driving signal.
Further, the ac driving unit includes driving resistors R7, R8, R12, R13 and insulated gate bipolar transistors IGBT1, IGBT2, IGBT3, IGBT4, one end of the driving resistor R7 is connected to the control unit, the other end is connected to the gate of the IGBT1, one end of the driving resistor R8 is connected to the control unit, the other end is connected to the gate of the IGBT2, one end of the driving resistor R12 is connected to the control unit, the other end is connected to the gate of the IGBT3, one end of R13 is connected to the control unit, and the other end is connected to the gate of the IGBT 4.
Still further, the ac driving unit further includes equalizing resistors R9 and R14, wherein both ends of the equalizing resistor R9 are connected to the collectors and the emitters of the IGBTs 1 and 2, and both ends of the equalizing resistor R14 are connected to the collectors and the emitters of the IGBTs 3 and 4.
Further, the ac driving unit further includes an absorption loop unit connected to the collector and the emitter of the insulated gate bipolar transistor.
Further, the absorption loop unit includes resistors C2 and C4, and resistors R10, R11, R15, and R16, wherein the capacitor C3 and the resistors R10 and R11 form the absorption loops of the IGBTs 1 and 2, and the capacitor C4 and the resistors R15 and R16 form the absorption loops of the IGBTs 3 and 4.
Further, the output waveform switching unit further includes a diode D11 and a capacitor C79, and a resistor R129, where one end of the resistor R129 is connected to the control unit, and the other end of the resistor R129 is connected to the capacitor C79 and the base of the triode, and the other end of the capacitor is grounded to the emitter of the triode, and one end of the diode D11 is connected to the collector of the triode and the relay, and the other end is connected to the power supply.
Compared with the prior art, the technical scheme provided by the invention can freely select the output mode of the welding machine by a user. After receiving the input of the user, the control panel outputs an AC/DC control signal after processing the input by the singlechip. The action of the relay is controlled through the triode by the AC/DC control signal to control the on state of the output DC bus, thereby realizing the switching of AC and DC. When the output is direct current, the machine can realize three welding modes of DC-MMA (direct current-manual welding), DC-TIG (direct current-non-consumable electrode inert gas tungsten electrode shielded welding) and DC-MIG (direct current-consumable electrode inert gas shielded welding) through the panel selection; when the output is alternating current, two welding modes of AC-MMA (alternating current-manual welding) and AC-TIG (alternating current-non-consumable electrode inert gas tungsten electrode protection welding) are realized through panel selection, so that the defect of a single welding mode of a previous welding machine is overcome, multiple welding modes are realized through one welding machine, and therefore different welding requirements can be met through switching functions in different welding occasions instead of changing different welding machine types.
Drawings
The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:
FIG. 1 is a schematic diagram of a welder for outputting AC or DC power;
FIG. 2 is a schematic circuit diagram of a welder outputting AC or DC power provided by the present invention;
FIG. 3 is a schematic diagram of the current of a bridge rectifier unit of the welding machine according to the present invention;
fig. 4 is a PFC power factor correction unit of the welder provided by the present invention;
fig. 5 is a full-bridge inverter unit of the welder provided by the invention;
FIG. 6 is an output rectifying unit of the welder provided by the present invention;
fig. 7 is an output waveform switching unit of the welder provided by the invention.
Detailed Description
The invention provides a welder for outputting alternating current or direct current, which adopts double voltages, the input alternating current voltage is rectified by a full bridge, the rectified pulsating direct current voltage is changed into smoother direct current after being rectified by a BOOST power factor, the direct current is changed into square wave after being output by full bridge inversion, the square wave is output to a secondary side through a transformer, then the square wave is output after being rectified by a secondary full bridge, and the output state can be switched by the selection of a panel.
In order to make the objects, advantages and features of the present invention more apparent, the welder capable of outputting both direct current and alternating current according to the present invention will be described in further detail with reference to fig. 1 to 7. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a welder outputting ac or dc power provided by the present invention. The invention discloses a welder for outputting alternating current or direct current, which comprises an input voltage and a direct current rectification output unit, wherein the input voltage forms direct current output through the direct current rectification output unit; a control unit for outputting a DC/AC control signal according to the input signal; and the output waveform switching unit outputs a direct current driving signal or an alternating current driving signal according to the direct current/alternating current control signal, and is connected with the direct current rectifying output unit and the secondary inversion unit. The dc rectifying output unit includes a bridge rectifying unit 20, a power factor correcting unit 30, a full-bridge inverter unit 40, and an output rectifying unit 50. The control unit includes a display panel 90, a control loop 80. The control circuit 80 is connected to the full-bridge inverter unit 40 and the output waveform switching unit 60. The dc driving signal and the ac driving signal output from the output waveform switching unit 60 are respectively connected to the output rectifying unit 50 and the secondary inverting unit 70 for outputting a dc unit or an ac unit.
The connection of the individual units and the specific circuit composition are described with reference to fig. 2-7.
Fig. 3 is a circuit schematic of the bridge rectifier unit. As shown in fig. 3, the bridge rectifier 20 has the main function of rectifying 1-110V/220V input to output a pulsating direct current, and in the positive half-cycle of the alternating current, D1 and D4 are turned on, and in the negative half-cycle, D2 and D3 are turned on, thereby realizing the rectifying function.
Fig. 4 is a circuit schematic of the power factor correction unit. As shown in fig. 4, the main function of the power factor correction unit 30 is to implement power factor correction. The rectified voltage, the voltage at two ends of the capacitor C5 and the current flowing through the loop are sampled, PWM modulation is realized through the PFC control circuit, and therefore IBGT (V8 and V8-1) is driven to realize power factor correction. When the insulated gate bipolar transistor IGBT is turned on, the rectified voltage passes through LT energy storage, and when the IGBT is turned off, the rectified voltage and LT energy storage inductance discharge charge a main capacitor C5 through a diode D5 (anti-reverse diode), so that the output voltage DC1 is higher than DC, and the boosting effect is realized. In fig. 4, the capacitor C1 and the diodes D6 and R5 are IGBT snubber circuits, the resistors R1 and R3 are driving resistors, and the resistor R6 and the capacitor C2 are diode D5 snubber circuits.
Fig. 5 is a circuit schematic of the full-bridge inverter unit. As shown in fig. 5, the full-bridge inverter unit 40 inverts the PFC-power-factor-corrected voltage into square-wave ac through a full bridge. When the inversion driving in the control loop is used for conducting signals of the triodes Q1 and Q4, the output is positive square waves, when the inversion driving in the control loop is used for conducting signals of the triodes Q2 and Q3, the output is negative square waves, and then the square wave voltage is reduced by the transformer ZBYQ and then is output to the secondary side.
Fig. 6 is a circuit schematic diagram of the output rectifying unit. As shown in fig. 6, the output rectifying unit 50 performs full-wave rectification of the transformer ZBYQ step-down ac to dc. Diodes D7, D10 are conductive when square wave is positive, and diodes D8, D9 are conductive when square wave is negative.
Fig. 7 is a circuit schematic diagram of the output waveform switching unit. As shown in fig. 7, the output waveform switching unit 60 is connected to a control circuit 80 to switch the output AC/DC. The control circuit 80 outputs an ac/dc control signal, and if the output is a dc control signal, the output waveform switching unit 60 outputs a dc drive signal; the output waveform switching unit 60 outputs an ac drive signal if the ac control signal is output.
When the AC/DC (alternating current/direct current) selection of the control panel 90 is determined, the signal is processed through the control loop 80 and then an AC/DC control signal is outputted. When a direct current is selected, the illustrated transistor T50 is turned on, and the relay J1 is turned on, thereby outputting a direct current. When the alternating current is selected, the triode T50 is not conducted, the relay J1 does not act, at the moment, the alternating current driving of the control loop outputs control pulses, the IGBT1, the IGBT2, the IGBT3 and the IGBT4 in the diagram are driven through the driving resistors R7, R8, R12 and R13, when the IGBT1 and the IGBT2 are conducted, the output is positive, and when the IGBT3 and the IGBT4 are conducted, the output is negative, so that the alternating current is output. In fig. 7, R9 and R14 are equalizing resistors, and the two ends of the equalizing resistor R9 are connected to the collectors and the emitters of the IGBTs 1 and 2, and the two ends of the equalizing resistor R14 are connected to the collectors and the emitters of the IGBTs 3 and 4.
In fig. 7, C3, R10, and R11 are absorption loops of IGBT1 and IGBT2, and C4, R15, and R16 are absorption loops of IGBT3 and IGBT 4. The output waveform switching unit further comprises a diode D11 and a capacitor C79, a resistor R129, one end of the resistor R129 is connected with the control unit, the other end of the resistor R129 is connected with the capacitor C79 and the base electrode of the triode, the other end of the capacitor is grounded with the emitting electrode of the triode, one end of the diode D11 is connected with the collector electrode of the triode and the relay, and the other end of the diode D11 is connected with the power supply. P2 and P3 are output interfaces.
When the welder is used, a user selects an output mode of the welder through the control panel. After receiving the input of the user, the control panel outputs an AC/DC control signal after processing the input by the singlechip. The action of the relay is controlled through the triode by the AC/DC control signal to control the on state of the output DC bus, thereby realizing the switching of AC and DC. When the output is direct current, the machine can realize three welding modes of DC-MMA (direct current-manual welding), DC-TIG (direct current-non-consumable electrode inert gas tungsten electrode shielded welding) and DC-MIG (direct current-consumable electrode inert gas shielded welding) through the panel selection; when the output is alternating current, two welding modes of AC-MMA (alternating current-manual welding) and AC-TIG (alternating current-non-consumable electrode inert gas tungsten electrode protection welding) are realized through panel selection, so that the defect of a single welding mode of the traditional welding machine is overcome, and the requirements of various occasions are met.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (5)
1. A welder for outputting alternating current or direct current, comprising: the input voltage forms direct current output through the direct current rectification output unit; a control unit for outputting a DC/AC control signal according to the input signal; the output waveform switching unit outputs a direct current drive signal or an alternating current drive signal according to the direct current/alternating current control signal, and is connected with the direct current rectification output unit and the secondary inversion unit;
the output waveform switching unit comprises a triode, a relay and an alternating current driving unit; when the input signal is a direct current control signal, the triode is conducted, the relay is attracted, and the output waveform switching unit outputs a direct current driving signal; when the input signal is an alternating current control signal, the triode is not conducted, the relay is not attracted, and the alternating current driving unit outputs an alternating current driving signal;
the alternating current driving unit comprises driving resistors R7, R8, R12 and R13 and insulated gate bipolar transistors IGBT1, IGBT2, IGBT3 and IGBT4, one end of the driving resistor R7 is connected with the control unit, the other end of the driving resistor R7 is connected with the grid of the IGBT1, one end of the driving resistor R8 is connected with the control unit, the other end of the driving resistor R8 is connected with the grid of the IGBT2, one end of the driving resistor R12 is connected with the control unit, the other end of the driving resistor R12 is connected with the grid of the IGBT3, one end of the driving resistor R13 is connected with the control unit, and the other end of the driving resistor R8 is connected with the grid of the IGBT 4;
the alternating current driving unit further comprises equalizing resistors R9 and R14, wherein two ends of the equalizing resistor R9 are connected with the collector and the emitter of the IGBT1 and the IGBT2, and two ends of the equalizing resistor R14 are connected with the collector and the emitter of the IGBT3 and the IGBT 4;
the alternating current driving unit further comprises an absorption loop unit, wherein the absorption loop unit is connected with a collector electrode and an emitter electrode of the insulated gate bipolar transistor;
the output waveform switching unit further comprises a diode D11 and a capacitor C79, a resistor R129, one end of the resistor R129 is connected with the control unit, the other end of the resistor R129 is connected with the capacitor C79 and the base electrode of the triode, the other end of the capacitor C79 is grounded with the emitter electrode of the triode, one end of the diode D11 is connected with the collector electrode of the triode and the relay, and the other end of the diode D11 is connected with the power supply.
2. The welder of claim 1 wherein the input voltage is 110V or 220V ac voltage.
3. The welder of claim 1 wherein the dc rectified output unit comprises a bridge rectification unit, a power factor correction unit, a full bridge inverter unit, and an output rectification unit.
4. The welding machine of claim 1, wherein the control unit comprises a control panel and a single-chip microcomputer, the single-chip microcomputer converting an input signal of the control panel into the direct current/alternating current control signal.
5. The welding machine according to claim 1, characterized in that the absorption loop unit comprises resistors C2, C4, resistors R10, R11, R15, R16, wherein the capacitor C3, the resistors R10, R11 constitute the absorption loop of the IGBT1, IGBT2, and the capacitor C4, the resistors R15, R16 constitute the absorption loop of the IGBT3, IGBT 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810216242.2A CN108296605B (en) | 2018-03-16 | 2018-03-16 | Welder for outputting alternating current or direct current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810216242.2A CN108296605B (en) | 2018-03-16 | 2018-03-16 | Welder for outputting alternating current or direct current |
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| Publication Number | Publication Date |
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| CN108296605A CN108296605A (en) | 2018-07-20 |
| CN108296605B true CN108296605B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810216242.2A Active CN108296605B (en) | 2018-03-16 | 2018-03-16 | Welder for outputting alternating current or direct current |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022127139A1 (en) * | 2020-12-14 | 2022-06-23 | 上海威特力焊接设备制造股份有限公司 | Multifunctional ac/dc welding machine capable of automatically changing polarity |
| CN112548271A (en) * | 2020-12-14 | 2021-03-26 | 上海威特力焊接设备制造股份有限公司 | Automatic change multi-functional AC/DC welding machine of polarity |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE732461A (en) * | 1968-05-03 | 1969-10-16 | ||
| CA2265278A1 (en) * | 1998-04-17 | 1999-10-17 | Lincoln Global, Inc. | Electric arc welder and controller therefor |
| CN1241466A (en) * | 1998-07-09 | 2000-01-19 | 伊利诺伊工具公司 | Power converter with low loss switching |
| CN1298778A (en) * | 1999-12-08 | 2001-06-13 | 林肯环球公司 | Welding machine driven by fuel cell |
| CN101274384A (en) * | 2007-03-29 | 2008-10-01 | 株式会社神户制钢所 | Consumable electrode type gas shielded arc welding control apparatus and welding control method |
| CN207952889U (en) * | 2018-03-16 | 2018-10-12 | 上海威特力焊接设备制造股份有限公司 | A kind of welding machine of output AC or DC |
-
2018
- 2018-03-16 CN CN201810216242.2A patent/CN108296605B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE732461A (en) * | 1968-05-03 | 1969-10-16 | ||
| CA2265278A1 (en) * | 1998-04-17 | 1999-10-17 | Lincoln Global, Inc. | Electric arc welder and controller therefor |
| CN1241466A (en) * | 1998-07-09 | 2000-01-19 | 伊利诺伊工具公司 | Power converter with low loss switching |
| CN1298778A (en) * | 1999-12-08 | 2001-06-13 | 林肯环球公司 | Welding machine driven by fuel cell |
| CN101274384A (en) * | 2007-03-29 | 2008-10-01 | 株式会社神户制钢所 | Consumable electrode type gas shielded arc welding control apparatus and welding control method |
| CN207952889U (en) * | 2018-03-16 | 2018-10-12 | 上海威特力焊接设备制造股份有限公司 | A kind of welding machine of output AC or DC |
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| CN108296605A (en) | 2018-07-20 |
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