CN103128425B - Portable electric welder - Google Patents
Portable electric welder Download PDFInfo
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- CN103128425B CN103128425B CN201210509399.7A CN201210509399A CN103128425B CN 103128425 B CN103128425 B CN 103128425B CN 201210509399 A CN201210509399 A CN 201210509399A CN 103128425 B CN103128425 B CN 103128425B
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Abstract
The present invention relates to a kind of Portable electric welder, solve in existing Phase of Electric Power Projects and use Electricity generating welder, the floating voltage caused between electrode holder threatens personal safety, electric welding machine is not in electric welder's visual line of sight, the uncontrollable problem of intermediate link safety, comprise shell, rectification in the enclosure and filtration module are set, battery pack is provided with as dc source in shell, battery pack connects straight/friendship inversion module, directly/hand over inversion module to connect rectification and filtration module, rectification and filtration module connect IGBT device for power switching and carry out frequency modulation to direct current, IGBT device for power switching connecting welding module.Battery pack is as dc source, without external power supply, electric welding machine can be placed within the scope of electric welding location security, the length of bonding wire is proper, there will not be the scene that bonding wire is pullled, prevent dangerous generation, electric welding machine is also in the visual line of sight of electric welder all the time, be in controllable state, security is high.
Description
Technical field
The present invention relates to a kind of electric welding machine, especially a kind of easy to carry, Portable electric welder easy to use.
Background technology
In power construction, grounded screen makes, electrical equipment is fixed and crane span structure making etc. all needs to carry out electric welding field, in repairing work, relate to the work such as equipment replacement installation also need to carry out electric welding field, therefore electric welding construction becomes in power engineering than an indispensable procedure.
Current electric welding machine generally adopts AC network to power, and power supply is 380/200V.Because new construction construction environment is simple and crude, often need unit in charge of construction power autonomous, or needs of constructing under equipment fault power-off condition in repairing are power autonomous, weld job needs to adopt the Electricity generating welder with generator function.Existing Electricity generating welder needs gasoline driven, weight and volume is all larger, removes far away and places all constant, and needing to carry some auxiliary equipment, Electricity generating welder use cost is higher, comprises depreciation of equipment, gasoline expense, regular maintenance expense and equipment repair expense.Because placement location is limited, the displacement of bonding wire is also distant, and make Site Welding job execution labour intensity large, efficiency is low.Wire length one easily causes security incident greatly, according to safety evaluatio standard, electric welding machine wire length can not more than 30 meters, Electricity generating welder needs to consume a large amount of oxygen in running, the toxic gas such as carbon monoxide, nitrogen dioxide can be discharged simultaneously, therefore Electricity generating welder can not be placed in confined space and use, and needs like this to have ventilation unit at the construction field (site).Above-mentioned factor causes electric welding machine and electric welder to there is certain distance, the electric welder no-load time increases, between electrode holder, the floating voltage of 70-90V threatens personal safety, electric welder and electric welding machine are in different spaces, electric welding machine is not in electric welder's visual line of sight, intermediate link safety is uncontrollable, bonding wire reaches 30 meters, there is multiple solder joint in the weld jobs such as grounded screen, bonding wire is pullled more, adds job site dangerous spot, and Electricity generating welder running noises reaches more than 100 decibels, also can cause job site noise pollution, add site safety management difficulty.
Therefore need badly and to be a kind ofly convenient for carrying, to be convenient to the new equipment of attended operation without the need to gasoline driven.
Patent Office of the People's Republic of China discloses a CN102218584A document on October 19th, 2011, name is called that CPU controls high-power portable electric welding machine, comprise the CPU control circuit board, radiator, fan and the screen layer that are arranged in shell, in shell, be also provided with four IGBT power tube Q1, high frequency resonant soft-switching circuit that Q2, Q3, Q4, two resonant inductance L1, L2, high frequency transformer T1, two fast recovery diode D1, D2, input filter capacitor C1, resonant capacitance C2, output filter capacitor C3 and ferrite reactor L3 form.But this electric welding machine still uses alternating current as power supply, this makes troubles just to the power supply in using, and still can exist because of electric welding machine and the distant and safety problem that causes of electric welding.
Summary of the invention
The object of this invention is to provide a kind of Portable electric welder, have dc-battery as welding power supply, through straight/friendship inversion, rectification, be reverse into and for the welding dc source of welding, can be convenient for carrying again.
The invention solves use Electricity generating welder in existing Phase of Electric Power Projects and cause electric welding machine and electric welding positional distance far away, the floating voltage caused between electrode holder threatens personal safety, electric welding machine is not in electric welder's visual line of sight, the uncontrollable problem of intermediate link safety, a kind of Portable electric welder is provided, electric welding machine can be placed in the safe range of electric welding position, meets the optimum length of bonding wire, therefore electric welding machine is in the sight line of electric welder all the time, and safety coefficient is high.
This invention also solves electric welding machine in existing power construction and electric welding positional distance far away, bonding wire reaches 30 meters, there is multiple solder joint in the weld jobs such as grounded screen, bonding wire is pullled more, adds the defect of job site dangerous spot, provides a kind of Portable electric welder, electric welding machine can be placed in the safe range of electric welding position, shorten the length of bonding wire, there will not be bonding wire to pull phenomenon, prevent dangerous generation.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Portable electric welder, comprise shell, rectification in the enclosure and filtration module are set, battery pack is provided with as dc source in shell, battery pack connects straight/friendship inversion module, directly/hand over inversion module to connect rectification and filtration module, rectification and filtration module connect IGBT device for power switching and carry out frequency modulation to direct current, IGBT device for power switching connects inverter power output circuit, inverter power output circuit connection transformer, transformer connects output rectification circuit, inverter power output circuit connects main control unit and is controlled the pulse width of inverter power output circuit by main control unit, main control unit by sample circuit connection transformer armature winding, inverter power output circuit, transformer, output rectification circuit and main control unit constitute welding module.Using battery pack as dc source, without external power supply, electric welding machine can be placed within the scope of electric welding location security, the length of bonding wire is proper, there will not be the scene that bonding wire is pullled, prevent dangerous generation, electric welding machine is also in the visual line of sight of electric welder all the time, be in controllable state, security is high, battery pack is direct current, but voltage is not high, can not directly use as the source of welding current again, therefore need to process direct current, first direct current is passed through straight/friendship inversion module, obtain the alternating current of 220V, again alternating current is obtained+310V DC voltage through over commutation and filtration module, then PWM pulse modulation technology is adopted to carry out frequency modulation by IGBT device for power switching, high-frequency square-wave signal is converted to again through inverter power output circuit, output rectification circuit is transferred to through transformer, obtain the voltage signal only having positive pulse, finally export the DC voltage of 60-80V, frequency modulation is the instantaneous high frequency power in order to adapt to needed for electric welding striking, the controlled square-wave pulse of width is produced by main control unit, square-wave pulse is exported to inverter power output circuit, thus change the width that inverter power output circuit exports pulse, with stabilizing output current, sample circuit detects the electric current of the armature winding of output transformer, and the signal of detection send main control unit, in order to adjust pulse width in time, makes electric welding machine output current be operated in stable state.
As preferably, straight/to hand over inversion module to adopt 3 power inverter modules, 3 power inverter modules are arranged side by side after over commutation and filtration module separately, directly connect IGBT device for power switching side by side.The analog power entering welding module will carry out side by side, cannot be arranged side by side but exchange, and therefore the output of three power inverter modules needs arranged side by side again after each self-rectifying.
As preferably, rectification and filtration module are connected with overvoltage crowbar, and overvoltage crowbar adopts electronic current limiter, connect before electric current limiter straight/hand over inversion module, after connect and can recover thermistor, thermistor can be recovered and connect with rectification and filtration module.
As preferably, power inverter module adopts the power inverter module of 1kw specification, can recover thermistor and adopt 361KD07 piezo-resistance.Φ 3.2 welding rod Site Welding, input power is civil power 220V50Hz, in normal weld process, pincerlike meter measures input current scope is 6.0-12A, during work, input power is 1.32-2.5kW, wherein stable bonding power is 1.5-1.6 kW, based on above-mentioned calculation of measured data, power inverter module stability bonding power requires to be greater than 2.5kW, firm power is greater than 1.6kW, therefore need to select to be greater than the direct current of 2.5kW to ac converter modular converter, consider Capacity Margin, select 3 inversion module power schemes; Piezo-resistance has protective value of shoving preferably.
As preferably, main control unit comprises interconnective drive circuit and vibration and pulse-width modulation circuit, and drive circuit connects inverter power output circuit, and sample circuit is connected with vibration and pulse-width modulation circuit.
As preferably, main control unit is connected with transformer, by transformer for main control unit provides power supply by current rectifying and wave filtering circuit and mu balanced circuit; Main control unit also comprises overheating protection circuit, and overheating protection circuit connects vibration and pulse-width modulation circuit.
As preferably, the supply voltage of main control unit is+15V, and the electric welding machine start starting stage, transformer Non voltage output is to main control unit, and now mu balanced circuit is connected with rectification and filtration module, main control unit acquisition+18.6V voltage after step-down and voltage stabilizing.
As preferably, described battery pack adopts the plumbic acids of two joint 12V to turn around serial battery and forms; Directly/and hand over inversion module specification to be that DC24V turns AC220V-50Hz/60Hz, IGBT device for power switching is by the high frequency of 50Hz/60Hz power frequency furnishing 70KHz.Plumbic acid turns around that battery volume is little, and weight is little, and discharge performance is good, and instantaneous discharge ability is strong, has stronger impact resistance, and can be charged to battery pack by vehicle-mounted power supply, is conducive to the flying power improving work on the spot.
As preferably, inverter power output circuit adopts two-tube single-ended forward type circuit.In this circuit, main transformer is without the need to degaussing reset winding, and it is low that two-transistor forward converter has switching voltage stress, and inherent anti-bridge arm direct pass ability is strong.
In order to ensure power source performance, ensure instantaneous power needed for striking, as preferably, parallel voltage-stabilizing storage capacitor after rectification and filtration module, voltage stabilizing storage capacitor is the capacitor array that 10 450V/1000 μ F electrochemical capacitors compose in parallel.
The invention has the beneficial effects as follows: battery pack is as dc source, without external power supply, electric welding machine can be placed within the scope of electric welding location security, the length of bonding wire is proper, there will not be the scene that bonding wire is pullled, prevent dangerous generation, electric welding machine is also in the visual line of sight of electric welder all the time, be in controllable state, security is high; Frequency modulation is the instantaneous high frequency power in order to adapt to needed for electric welding striking, the controlled square-wave pulse of width is produced by main control unit, square-wave pulse is exported to inverter power output circuit, thus change the width that inverter power output circuit exports pulse, with stabilizing output current; Sample circuit detects the electric current of the armature winding of output transformer, and the signal of detection send main control unit, in order to adjust pulse width in time, makes electric welding machine output current be operated in stable state.
Accompanying drawing explanation
Fig. 1 is a kind of principle schematic of the present invention;
Fig. 2 is a kind of functional schematic of the present invention;
Fig. 3 is a kind of inverter power output circuit of the present invention schematic diagram;
Fig. 4 is that the present invention's one exports rectified current schematic diagram;
Fig. 5 is a kind of main control unit structural representation of the present invention;
Fig. 6 is a kind of main control unit power supply of the present invention schematic diagram;
Fig. 7 is a kind of overvoltage crowbar schematic diagram of the present invention;
Detailed description of the invention
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: a kind of Portable electric welder (see accompanying drawing 1), comprise shell, be provided with 2 group 4 in shell and save the battery pack that 12V/24AH plumbic acid turns around serial battery, battery pack connects straight/friendship inversion module, rectification and filtration module is connected after directly/friendship inversion module parallel voltage-stabilizing storage capacitor, rectification and filtration module connect the IGBT device for power switching of frequency modulation, IGBT device for power switching connecting welding module.Welding module comprises inverter power output circuit, transformer, output rectification circuit and main control unit (see accompanying drawing 2).Inverter power output circuit connection transformer, transformer connects output rectification circuit, inverter power output circuit connects main control unit, the armature winding of transformer connects sample circuit, sample circuit is connected with main control unit, transformer is connected with main control unit by current rectifying and wave filtering circuit and mu balanced circuit, and mu balanced circuit is also directly connected with rectification and filter circuit.Export rectified current linked reactor, obtain DC voltage and tributary electric current by reactor filtering.Voltage stabilizing storage capacitor is the capacitor array that 10 450V/1000 μ F electrochemical capacitors compose in parallel.The direct current of 24V converts the alternating current of 220V/50Hz to through inversion, alternating current obtains the DC voltage of+310V through over commutation and filter circuit, the high-frequency square-wave signal of 70KHz is become again through frequency modulation, output rectification circuit is transferred to again through transformation, obtain the voltage signal only having positive pulse, obtain DC voltage, DC current through reactor filtering, when electric weld handle zero load, voltage is 60-80V, and after striking, voltage drop is to 20V.
Directly/hand over inversion module to adopt 3 1kw, DC24V to turn the power inverter module of AC220V-50Hz/60Hz specification, 3 power inverter modules are arranged side by side after over commutation and filtration module separately, directly connect IGBT device for power switching side by side, IGBT device for power switching is by the high frequency of 50Hz/60Hz power frequency furnishing 70KHz.Rectification and filtration module are connected with overvoltage crowbar (see accompanying drawing 7); overvoltage crowbar adopts electronic current limiter; connect before electric current limiter straight/hand over inversion module, after connect and can recover thermistor; thermistor can be recovered connect with rectification and filtration module, thermistor can be recovered and adopt 361KD07 piezo-resistance.
Inverter power output circuit adopts two-tube single-ended forward type circuit (see accompanying drawing 3).Inverter power output circuit connects output rectification circuit (see accompanying drawing 4) after transformer transformation, and Q1 and Q2 conducting simultaneously, turns off simultaneously: during Q1 and Q2 conducting simultaneously, transformer provides voltage to secondary windings, exports rectified current through diode D5; When Q1 and Q2 turns off simultaneously, output current is through diode D6 afterflow.Due to the conducting of diode D2 and D4, the voltage that Q1 and Q2 is born is only supply voltage value.Although this two-tube single ended forward circuit is a multiplex switching tube, it is added to the voltage of switching tube comparatively single-tube circuit is low half, and transformer has lacked a magnetic-reset winding, so this circuit is applicable to the situation with high-line input voltage simultaneously.
Main control unit (see accompanying drawing 5) comprises interconnective drive circuit, vibration and pulse-width modulation circuit and overheating protection circuit; drive circuit connects inverter power output circuit; sample circuit is connected with vibration and pulse-width modulation circuit; main control unit herein adopts PK-02-A1(AT89 S52) chip of model, drive circuit adopts B-XQDB driver module.Main control unit is connected with transformer, by transformer for main control unit provides power supply (see accompanying drawing 6) by current rectifying and wave filtering circuit and mu balanced circuit.VA+, VA-of transformer obtain+15V voltage through current rectifying and wave filtering circuit, mu balanced circuit.The electric welding machine start starting stage, transformer exports without VA+, VA-voltage, now obtains+18.6V voltage by+310V voltage through step-down and mu balanced circuit.
Above-described embodiment is a kind of preferred version of the present invention, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (9)
1. a Portable electric welder, comprise shell, rectification in the enclosure and filtration module are set, it is characterized in that being provided with battery pack in shell as dc source, battery pack connects straight/friendship inversion module, directly/hand over inversion module to connect rectification and filtration module, rectification and filtration module connect IGBT device for power switching and carry out frequency modulation to direct current, IGBT device for power switching connects inverter power output circuit, inverter power output circuit connection transformer, transformer connects output rectification circuit, inverter power output circuit connects main control unit and is controlled the pulse width of inverter power output circuit by main control unit, main control unit by sample circuit connection transformer armature winding, inverter power output circuit, transformer, output rectification circuit and main control unit constitute welding module, main control unit is connected with transformer, by transformer for main control unit provides power supply by current rectifying and wave filtering circuit and mu balanced circuit, the supply voltage of main control unit is+15V, and the electric welding machine start starting stage, transformer Non voltage output is to main control unit, and now mu balanced circuit is connected with rectification and filtration module, and after step-down and voltage stabilizing, main control unit obtains+18.6V voltage.
2. Portable electric welder according to claim 1, is characterized in that straight/friendship inversion module adopts 3 power inverter modules, and 3 power inverter modules are arranged side by side after over commutation and filtration module separately, directly connect IGBT device for power switching side by side.
3. Portable electric welder according to claim 2; it is characterized in that rectification and filtration module are connected with overvoltage crowbar; overvoltage crowbar adopts electronic current limiter; connect before electronic current limiter straight/hand over inversion module, after connect and can recover thermistor, thermistor can be recovered and connect with rectification and filtration module.
4. Portable electric welder according to claim 3, is characterized in that power inverter module adopts the power inverter module of 1kw specification, can recover thermistor and adopt 361KD07 piezo-resistance.
5. the Portable electric welder according to claim 1 or 2 or 3 or 4, it is characterized in that main control unit comprises interconnective drive circuit and vibration and pulse-width modulation circuit, drive circuit connects inverter power output circuit, and sample circuit is connected with vibration and pulse-width modulation circuit.
6. Portable electric welder according to claim 5, is characterized in that main control unit also comprises overheating protection circuit, and overheating protection circuit connects vibration and pulse-width modulation circuit.
7. the Portable electric welder according to claim 1 or 2 or 3 or 4, is characterized in that described battery pack adopts the plumbic acid of two joint 12V to turn around serial battery and forms; Directly/and hand over inversion module specification to be that DC24V turns AC220V-50Hz/60Hz, IGBT device for power switching is by the high frequency of 50Hz/60Hz power frequency furnishing 70KHz.
8. the Portable electric welder according to claim 1 or 2 or 3 or 4, is characterized in that inverter power output circuit adopts two-tube single-ended forward type circuit.
9. the Portable electric welder according to claim 1 or 2 or 3 or 4, it is characterized in that parallel voltage-stabilizing storage capacitor after rectification and filtration module, voltage stabilizing storage capacitor is the capacitor array that 10 450V/1000 μ F electrochemical capacitors compose in parallel.
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| CN201210509399.7A CN103128425B (en) | 2012-11-30 | 2012-11-30 | Portable electric welder |
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| CN201210509399.7A CN103128425B (en) | 2012-11-30 | 2012-11-30 | Portable electric welder |
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| CN103128425B true CN103128425B (en) | 2015-09-23 |
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| CN105414714B (en) * | 2015-12-31 | 2017-07-11 | 上海广为焊接设备有限公司 | A kind of primary constant-current circuit of inverter type welder |
| CN105553284A (en) * | 2016-03-07 | 2016-05-04 | 西安交通大学 | DC high-order energy-obtaining power supply with wide input voltage range |
| CN105897007A (en) * | 2016-04-16 | 2016-08-24 | 合肥博雷电气有限公司 | Large power microwave device testing power supply |
| CN106238893A (en) * | 2016-09-19 | 2016-12-21 | 广州皖力实业有限公司 | Innovation high frequency switched capacitances reserve energy spot welding machine |
| US11033977B2 (en) * | 2017-04-21 | 2021-06-15 | Illinois Tool Works Inc. | Welding type power supply with output rectifier and phase shift double forward converter |
| CN107813031A (en) * | 2017-12-08 | 2018-03-20 | 苏州绿恺动力电子科技有限公司 | Portable inverter arc welding system and its power control method |
| CN107900492B (en) * | 2017-12-21 | 2024-03-08 | 苍南县新源电子科技有限公司 | Numerical control type direct current electricity-taking electric welding machine |
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