CN2915348Y - Electric welding machine with input voltage self-adaptive circuit - Google Patents
Electric welding machine with input voltage self-adaptive circuit Download PDFInfo
- Publication number
- CN2915348Y CN2915348Y CN 200620024568 CN200620024568U CN2915348Y CN 2915348 Y CN2915348 Y CN 2915348Y CN 200620024568 CN200620024568 CN 200620024568 CN 200620024568 U CN200620024568 U CN 200620024568U CN 2915348 Y CN2915348 Y CN 2915348Y
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- circuit
- input voltage
- welding machine
- transformer
- automatic switching
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- Expired - Fee Related
Links
- 238000003466 welding Methods 0.000 title claims abstract description 55
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 239000010703 silicon Substances 0.000 claims abstract description 9
- 230000003044 adaptive effect Effects 0.000 claims abstract 7
- 239000003990 capacitor Substances 0.000 claims description 15
- 230000002457 bidirectional effect Effects 0.000 claims description 13
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 9
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Arc Welding Control (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The utility model relates to a welding machine with an input voltage adaptive circuit, belonging to a welding device field, which comprises a welding transformer connected with the two-way controllable silicon current adjustment unit in its primary side loop and is characterized in that the utility model is provided with a power transformer; the primary side of the power transformer and the primary side of the welding transformer are connected with the same voltage-level AC power supply; the primary side of the power transformer is provided with an input voltage identification unit; the output end of the input voltage identification unit is connected with an automatic switching unit; the output end of the automatic switching unit is connected with the pulsed triggering circuit of the two-way controllable silicon current adjustment unit. The voltage automatic identification and the automatic switching circuit are combined with the controllable silicon current adjustment circuit, which makes the AC welding machine have the input voltage adaptive function and avoids the damage of the electric equipments due to connecting with the unknown voltage-level power supply. The utility model can be widely used in the fields of the AC welding machine or various electric tools.
Description
Technical Field
The utility model belongs to the welding set field especially relates to an alternating current welding machine for arc welding or arc cutting.
Background
The electric welding machine is a low-voltage electrical equipment commonly used in the industries of construction, manufacturing and machining.
The working principle of the welding transformer is similar to that of a transformer, and the welding transformer is a step-down transformer; the two ends of the primary coil are connected with an alternating current power supply, the two ends of the secondary coil are a workpiece to be welded and a welding rod clamped on a welding clamp, and the gap of the workpiece and the welding rod are welded into a whole by igniting electric arcs between the workpiece to be welded and the welding rod and utilizing the high temperature of the electric arcs.
The existing ac welder is mainly composed of a housing, a welding transformer, input and output terminals thereof, and a cable connecting the electrode holders and the welder.
In order to adapt to different ac working power supply voltages, existing ac welding machines usually have different coil taps on the primary side of the welding transformer, which taps are led to terminals arranged on the outer casing of the welding machine to adapt to different working voltages.
Due to the fact that the conditions of a construction site are complex, power supplies of various voltage levels are mixed, and the situation that power supplies of different voltage levels are connected in a wrong mode often occurs. If a 380-volt power supply is connected to a 220-volt electric device, the fuse of the electric device is fused when the electric device is light, the electric device is burnt when the electric device is serious, the welding construction progress is influenced, and unnecessary economic loss is brought.
In addition, the welding current needs to be adjusted for welding parts and welding rods made of different materials.
In order to adjust the working current during welding, the conventional electric welding machine usually adopts the technical scheme that the depth of an iron core inserted into a coil is adjusted, and the magnitude of the working current is controlled by adjusting the inductance of the coil, and the technical scheme and the improvement thereof are disclosed in various Chinese patents (such as ZL01277019.1, ZL02291754.3, ZL03226346.5 and the like).
The current adjusting method is too extensive, cannot realize smooth and stepless adjustment of welding current, has high loss and is unfavorable for reducing welding construction cost.
The publication date is 9/26/2001, and chinese patent with publication number CN 2449856Y discloses a novel ac electric welding machine, which comprises a housing, an iron core, a primary coil, a secondary coil, and a triac current regulation circuit connected in series at the beginning of the primary coil. The electric welding machine has the advantages of small volume, light weight, wide current regulation range, convenient operation and good energy-saving effect, and can save energy by 3.27 KW/hour compared with the old electric welding machine and greatly reduce the labor intensity during operation.
But it has the disadvantage that the welding transformer of the electric welding machine cannot adapt to power supplies with different voltage levels.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an electric welding with input voltage self-adaptation circuit is provided. The welding current control device has the advantages of stepless regulation of welding current, energy conservation, high efficiency, small size of the whole machine and the like, and can automatically adapt to different alternating current working power supplies, thereby avoiding the damage to electric equipment caused by wrong connection of power supplies with different voltage levels.
The technical scheme of the utility model is that: the electric welding machine with the input voltage self-adaptive circuit comprises a welding transformer, wherein a bidirectional thyristor current adjusting unit is connected in series in a primary loop of the welding transformer, and the electric welding machine is characterized in that: arranging a power transformer; the primary side of the power transformer and the primary side of the welding transformer are connected to an alternating current power supply with the same voltage level; an input voltage identification unit is arranged on the secondary side of the power transformer; the output end of the input voltage identification unit is connected with an automatic switching unit; the output end of the automatic switching unit is connected with a pulse trigger circuit in the bidirectional controllable silicon current adjusting unit.
The input voltage identification unit at least comprises a rectifying circuit and a voltage-sensitive circuit; the automatic switching unit at least comprises an electric switching circuit; the pulse trigger circuit is a resistance-capacitance type oscillation circuit.
Furthermore, the output end of the automatic switching unit is connected in series between the pulse trigger circuit in the bidirectional controllable silicon current adjusting unit and the alternating current power supply.
Specifically, the input voltage identification unit includes a bridge rectifier circuit UR1, a capacitor C2, and a pull-in coil K of a relay; the automatic switching unit comprises output contacts K11, K12, K13 of the relay, and resistors R4 and R5; the pulse trigger circuit comprises an adjustable resistor W, a resistor R3, a capacitor C1 and a monocrystalline silicon tube D1.
The secondary sides T11 and T12 of the power transformer T1 are connected with the alternating current input ends 1 and 2 of the bridge rectifier circuit UR 1; a capacitor C2 and a pull-in coil K of a relay are connected in parallel between the direct current output ends 3 and 4 of the bridge rectification circuit UR 1; output contacts K12 and K13 of the relay are respectively connected with one end of an adjustable resistor W through resistors R4 and R5; the other end of the adjustable resistor W is connected with one end of an alternating current input power supply; an output contact K11 of the relay is connected with a capacitor C1 and one end of a monocrystalline silicon tube D1 through a resistor R3; the other end of the capacitor C1 is connected with the other end of the alternating current input power supply; the other end of the single crystal silicon tube D1 is connected with the control electrode of the bidirectional thyristor SCR.
Compared with the prior art, the utility model has the advantages that:
the combination of the automatic voltage identification and automatic switching circuit thereof and the bidirectional thyristor current regulation circuit is adopted, so that the alternating current welding machine has the function of self-adaption of input voltage, and the damage to electric equipment caused by accessing a power supply with unknown voltage grade is avoided.
Drawings
Fig. 1 is a block diagram of the circuit of the present invention;
fig. 2 is a circuit diagram of an embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
In fig. 1, a power transformer is provided; the primary side of the power transformer and the primary side of the welding transformer are connected to an alternating current power supply with the same voltage level; an input voltage identification unit is arranged on the secondary side of the power transformer; the output end of the input voltage identification unit is connected with an automatic switching unit; the output end of the automatic switching unit is connected with a pulse trigger circuit in the bidirectional controllable silicon current adjusting unit.
The input voltage identification unit at least comprises a rectifying circuit and a voltage-sensitive circuit; the automatic switching unit at least comprises an electric switching circuit; the pulse trigger circuit is a resistance-capacitance type oscillation circuit.
Furthermore, the output end of the automatic switching unit is connected in series between the pulse trigger circuit in the bidirectional controllable silicon current adjusting unit and the alternating current power supply.
In fig. 2, the input voltage identification unit includes a bridge rectifier circuit UR1, a capacitor C2 and a pull-in coil K of the relay; the automatic switching unit comprises output contacts K11, K12, K13 of the relay, and resistors R4 and R5; the pulse trigger circuit comprises an adjustable resistor W, a resistor R3, a capacitor C1 and a single crystal silicon tube D1.
The secondary sides T11 and T12 of the power transformer T1 are connected with the alternating current input ends 1 and 2 of the bridge rectifier circuit UR 1; a capacitor C2 and a pull-in coil K of a relay are connected in parallel between the direct current output ends 3 and 4 of the bridge rectification circuit UR 1; output contacts K12 and K13 of the relay are respectively connected with one end of an adjustable resistor W through resistors R4 and R5; the other end of the adjustable resistor W is connected with one end of an alternating current input power supply; an output contact K11 of the relay is connected with a capacitor C1 and one end of a monocrystalline silicon tube D1 through a resistor R3; the other end of the capacitor C1 is connected with the other end of the alternating current input power supply; the other end of the single crystal silicon tube D1 is connected with the control electrode of the bidirectional thyristor SCR.
The utility model discloses the working process brief notes:
by setting a proper secondary side output voltage of the power transformer, under the condition of 220/110V input voltage, the output voltage passing through the output end of the bridge rectifier circuit is not enough to pull in the relay K, and the series resistors in the pulse trigger circuit of the bidirectional thyristor current adjusting unit are W, R4 and R3; when the input voltage is 380V, the relay K is attracted by the output voltage of the output end of the bridge rectifier circuit, and the series resistors in the pulse trigger circuit of the bidirectional thyristor current adjusting unit are W, R5 and R3; the invention achieves the aim of automatically adapting to different input voltages by automatically adjusting the resistance value of the pulse trigger circuit (actually, a resistance-capacitance type oscillation circuit) according to the difference of the input voltages so as to further change the output characteristic of the pulse trigger circuit.
The utility model discloses a concrete implementation is not only limited to the specific circuit structure in above-mentioned embodiment, as technical staff in this field, can adopt the circuit or the module that have the same or similar function completely on the basis of understanding and mastering this technical scheme main points, constitutes because AC welding machine or various electric tools (such as electric cutting machine, electric emery wheel, electric drill etc.), have the circuit or the device of same function.
The utility model discloses can extensively be used for alternating current welding machine or various electric tool field.
Claims (6)
1. An electric welding machine with an input voltage self-adapting circuit comprises a welding transformer which is connected with a bidirectional controllable silicon current adjusting unit in series in a primary loop, and is characterized in that:
arranging a power transformer;
the primary side of the power transformer and the primary side of the welding transformer are connected to an alternating current power supply with the same voltage level;
an input voltage identification unit is arranged on the secondary side of the power transformer;
the output end of the input voltage identification unit is connected with an automatic switching unit;
the output end of the automatic switching unit is connected with a pulse trigger circuit in the bidirectional controllable silicon current adjusting unit.
2. The electric welding machine having an input voltage adaptive circuit according to claim 1 wherein said input voltage identification unit comprises at least a rectifying circuit and a voltage dependent circuit.
3. The electric welding machine having an input voltage adaptive circuit as set forth in claim 1 wherein said automatic switching unit comprises at least one electrical switching circuit.
4. The electric welding machine having an input voltage adaptive circuit according to claim 1 wherein said pulse trigger circuit is a resistance-capacitance type oscillating circuit.
5. The electric welding machine having an input voltage adaptive circuit according to claim 1 wherein the output of said automatic switching unit is connected in series between the pulse trigger circuit in the triac current regulation unit and the ac power source.
6. The electric welding machine with input voltage adaptive circuit according to claim 1, 2, 3, 4 or 5 wherein said input voltage identification unit comprises bridge rectifier circuit UR1, capacitor C2 and pull-in coil K of relay; the automatic switching unit comprises output contacts K11, K12, K13 of the relay, and resistors R4 and R5; the pulse trigger circuit comprises an adjustable resistor W, a resistor R3, a capacitor C1 and a monocrystalline silicon tube D1; wherein,
the secondary sides T11 and T12 of the power transformer T1 are connected with the alternating current input ends 1 and 2 of the bridge rectifier circuit UR 1;
a capacitor C2 and a pull-in coil K of a relay are connected in parallel between the direct current output ends 3 and 4 of the bridge rectification circuit UR 1;
output contacts K12 and K13 of the relay are respectively connected with one end of an adjustable resistor W through resistors R4 and R5;
the other end of the adjustable resistor W is connected with one end of an alternating current input power supply;
an output contact K11 of the relay is connected with a capacitor C1 and one end of a monocrystalline silicon tube D1 through a resistor R3;
the other end of the capacitor C1 is connected with the other end of the alternating current input power supply;
the other end of the single crystal silicon tube D1 is connected with the control electrode of the bidirectional thyristor SCR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620024568 CN2915348Y (en) | 2006-05-29 | 2006-05-29 | Electric welding machine with input voltage self-adaptive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620024568 CN2915348Y (en) | 2006-05-29 | 2006-05-29 | Electric welding machine with input voltage self-adaptive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2915348Y true CN2915348Y (en) | 2007-06-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620024568 Expired - Fee Related CN2915348Y (en) | 2006-05-29 | 2006-05-29 | Electric welding machine with input voltage self-adaptive circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN2915348Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944765A (en) * | 2010-11-04 | 2011-01-12 | 深圳市华意隆实业发展有限公司 | Dual-power automatic switching control device for electric welder |
| CN102079002A (en) * | 2011-01-26 | 2011-06-01 | 深圳华意隆电气股份有限公司 | Inverter welding and cutting machine with dual-voltage system |
| CN103221172A (en) * | 2011-10-05 | 2013-07-24 | 松下电器产业株式会社 | Welding machine |
| CN104600964A (en) * | 2013-10-31 | 2015-05-06 | 通用电气公司 | Voltage adapter system used in device |
| CN108994428A (en) * | 2018-08-03 | 2018-12-14 | 单超 | A kind of current regulator |
-
2006
- 2006-05-29 CN CN 200620024568 patent/CN2915348Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944765A (en) * | 2010-11-04 | 2011-01-12 | 深圳市华意隆实业发展有限公司 | Dual-power automatic switching control device for electric welder |
| CN102079002A (en) * | 2011-01-26 | 2011-06-01 | 深圳华意隆电气股份有限公司 | Inverter welding and cutting machine with dual-voltage system |
| CN103221172A (en) * | 2011-10-05 | 2013-07-24 | 松下电器产业株式会社 | Welding machine |
| CN103221172B (en) * | 2011-10-05 | 2015-03-18 | 松下电器产业株式会社 | Welding machine |
| CN104600964A (en) * | 2013-10-31 | 2015-05-06 | 通用电气公司 | Voltage adapter system used in device |
| CN108994428A (en) * | 2018-08-03 | 2018-12-14 | 单超 | A kind of current regulator |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |