CN202162481U - Self-adaptive inverter welding power source - Google Patents
Self-adaptive inverter welding power source Download PDFInfo
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- CN202162481U CN202162481U CN2011201738965U CN201120173896U CN202162481U CN 202162481 U CN202162481 U CN 202162481U CN 2011201738965 U CN2011201738965 U CN 2011201738965U CN 201120173896 U CN201120173896 U CN 201120173896U CN 202162481 U CN202162481 U CN 202162481U
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Abstract
The utility model provides a self-adaptive inverter welding power source, comprising a slow-start circuit, a rectifier filter circuit connected with the slow-start circuit, an inverter connected with the rectifier filter circuit, an auxiliary power circuit and a voltage doubling circuit that are connected with the rectifier filter circuit, a voltage sampling circuit connected with an output terminal of the auxiliary power circuit, and a voltage-doubling control circuit arranged between the voltage doubling circuit and the voltage sampling circuit. The self-adaptive inverter welding power source of the utility model solves the technical problems that welding power sources that are powered by a single electric network voltage are not suitable for multi-voltage power supply occasions, single-phase power supply leads to unbalanced electric network and affects operation of equipments, etc. In addition, the self-adaptive inverter welding power source provides convenience for users to a great extent, not only expanding the application range of the electric network voltage, but also preventing machine damage which may be caused due to connection to a voltage of a wrong class and guaranteeing the machine application safety. Furthermore, the self-adaptive inverter welding power source is simple in structure, low in cost and implementation cost, easy in manufacture process and excellent in performance and achieves the one-machine dual-purpose effect.
Description
Technical field
The utility model relates to electric welding machine and uses field of power supplies, is specifically related to a kind of self adaptation inversion source of welding current.
Background technology
In China, the power-frequency voltage grade is AC220V and AC380V, and is different in different occasion electric pressures, and some occasion has only a kind of situation of single-phase voltage.In the source of welding current industry, the general source of welding current can only adapt to single line voltage power supply and perhaps adopt the mode of manual switching switch to realize the manual switch of line voltage at present; The traditional welding power supply is to connect the effect that different voltages reach conversion with the mode that increases transformer tapping by different terminals; Conventional inversion welding source also can only be applicable to low voltage electric power system or high voltage power supply separately.
The patent that China's utility model patent publication number " CN 101733516 " name is called " direct-current inverter welding machine with dual supply voltage system " discloses a kind of supply voltage identification circuit, auxiliary power circuit, inversion major loop, electric current given circuit that comprises the circuit connection, and control circuit, and this supply voltage identification circuit comprises voltage sampling circuit, voltage identification circuit and the relay circuit that circuit connects; This auxiliary power circuit comprises rectification circuit that circuit connects, is equipped with volt circuit, power circuit; Voltage sampling circuit sampling input voltage signal is input to the voltage identification circuit with voltage signal, and identification is high pressure or low pressure; If high pressure; Then relay is failure to actuate, if low pressure, then relay adhesive; Be equipped with volt circuit work, bring up to commutating voltage the commutating voltage of high voltage power supply.
Above prior art has following shortcoming:
1, the source of welding current of single line voltage power supply can't adapt to multivoltage power supply occasion at all, and single phase power supply causes unbalanced power supply, influences its equipment work;
2, the mode of employing manual switching switch realizes the manual switch of line voltage, and artificial conversion can't realize the automatic conversion of line voltage and can damage welding equipment; Adopt the manual switching on-off mode can't well adapt to the frequent occasion of switching of supply voltage, lean on artificial conversion at every turn, not only loaded down with trivial details but also be easy to cause operating mistake, cause source of welding current fault;
3, the traditional welding power supply is to connect the effect that different voltages reach conversion with the mode that increases transformer tapping by different terminals, and the phenomenon that causes machine to burn because of the wrong terminal so often takes place; Increase input terminal and not only increase volume, and circuit is very complicated, cost also increases a lot, and security reduces on the contrary;
4, conventional inversion welding source also can only be applicable to low voltage electric power system or high voltage power supply separately; If receive the source of welding current of high voltage power supply on the low voltage electric power system; Then the source of welding current can not be worked; If receive the source of welding current of low voltage electric power system on the high voltage power supply, then the source of welding current can burn in overvoltage, has potential safety hazard;
5, Chinese utility model patent publication number " CN 101733516 " name is called the disclosed voltage identification circuit of patent of " direct-current inverter welding machine with dual supply voltage system " and is equipped with its structure of volt circuit very complicated; Implementation cost is higher; And the voltage range that adapts to is AC100V～240V; Scope is narrower, when power-frequency voltage 380V, can not work.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of self adaptation inversion source of welding current.
The technical scheme that the prior art problem that solves the utility model is adopted is: a kind of self adaptation inversion source of welding current is provided, comprises the slow-start circuit, the current rectifying and wave filtering circuit that is connected with the slow-start circuit, the inverter that is connected with current rectifying and wave filtering circuit; Also comprise the auxiliary power circuit and the voltage-multiplying circuit that are connected with current rectifying and wave filtering circuit,, be arranged at the multiplication of voltage control circuit between voltage-multiplying circuit and the voltage sampling circuit with the voltage sampling circuit that the output of auxiliary power circuit is connected.
Optimal technical scheme according to the utility model: said slow-start circuit comprises switching tube Q1, is arranged at the electrochemical capacitor C18 between switching tube Q1 base stage and the emitter stage, is arranged at switching tube Q1 base stage and collector diode D11 and diode D12; With diode D12 parallel resistor R22; The relay K 2 parallelly connected, and the thermistor RR1 parallelly connected with relay K 2 with diode D11.
Optimal technical scheme according to the utility model: said current rectifying and wave filtering circuit comprises rectifier bridge D1, electrochemical capacitor C1 and the electrochemical capacitor C2 parallelly connected with rectifier bridge D1; With electrochemical capacitor C1 parallel resistor R1, with electrochemical capacitor C2 parallel resistor R2.
Optimal technical scheme according to the utility model: said auxiliary power circuit comprises transformer T1; The former limit of said transformer T1 is one group; The secondary of said transformer T1 is made up of many groups secondary; Be connected with the RCD absorptive unit with the former limit of transformer T1, be connected with RC through resistance R 5 and RCD absorptive unit and store the unit; Said auxiliary power circuit also comprises driver element and switching tube Q2, and the base stage of said switching tube Q2 is connected with driver element, and colelctor electrode is connected with the RCD absorptive unit, and emitter stage is through resistance R 9 ground connection; Said driver element is connected with secondary.
Optimal technical scheme according to the utility model: said secondary is by first secondary, second secondary, and the 3rd secondary, fourth officer limit and the 5th secondary are formed; Said driver element is provided with-the V pin, R pin, G pin ,+24V pin; Said+24V pin is connected with the fourth officer limit; Said-V pin is connected with the RCD absorptive unit through R6; Said R pin is connected with the base stage of switching tube Q2.
Optimal technical scheme according to the utility model: said voltage sampling circuit is by inverting amplifier, and the comparator that is connected with inverting amplifier is formed.
Optimal technical scheme according to the utility model: said multiplication of voltage control circuit is by optocoupler U2, the switching tube Q4 that is connected with optocoupler U2, and the switching tube Q3 that is connected with switching tube Q4 forms.
Optimal technical scheme according to the utility model: said voltage-multiplying circuit is by relay K 1; With relay K 1 diode connected in parallel D2, the electrochemical capacitor C1 that is connected with relay K 1, electrochemical capacitor C2, and form with electrochemical capacitor C1 and electrochemical capacitor C2 parallel resistor R1 and resistance R 2 respectively.
Optimal technical scheme according to the utility model: also be provided with parallelly connected interlock circuit on the said inverting amplifier.
Optimal technical scheme according to the utility model: said parallelly connected interlock circuit is by switching tube Q5, the R16 that is connected with the base stage of switching tube Q5, and the D14 that is connected with the emitter stage of switching tube Q5 forms.
Implement the self adaptation inversion source of welding current of the utility model, have following beneficial effect:
1, the utility model designs a kind of inversion welding source of wide voltage adaptation ability; Particularly can operate as normal in line voltage AC160V～AC460V scope, all can operate as normal in the different occasions of single-phase 220V/380V, wrong voltage can not cause the inversion welding source of machine breakdown yet;
2, the error range of national standard line voltage be ± 10%, but some electricity consumption occasion line voltages can be on the low side or higher, not in error range.To such occasion, the utility model has been expanded the use occasion of the source of welding current, can operate as normal in line voltage AC160V～AC460V scope;
3, substitute traditional transformer tap, the dual-purpose source of welding current of the single-phase 220V/380V of controllable silicon; Power supply adopts 2 single-phase connecting lines, and it is convenient to connect electrical network, and volume is little; In light weight; Be more suitable for frequently moving occasion, also can be used for inversion direct current manual arc welding machine, also can be used for inversion direct current argon arc welding machine, inversion direct current CO
2Gas shielded welding machine, inversion direct current air plasma cutter and other welding and cutting device;
4, the utility model has made things convenient for the user to a great extent, has also enlarged the line voltage scope of application, also avoids simultaneously the machine breakdown that causes because of the wrong electric pressure, has guaranteed the safe in utilization of machine; Dual-use, cost is low, function admirable; And simple in structure, implementation cost is lower, manufacturing process is simple.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model.
Description of reference numerals:
Slow-start circuit 1; Current rectifying and wave filtering circuit 2; Inverter 3; Auxiliary power circuit 4; Voltage-multiplying circuit 5; Voltage sampling circuit 6; Multiplication of voltage control circuit 7.
The specific embodiment:
Referring to shown in Figure 1; The self adaptation inversion source of welding current that the utility model provides has wide electrical network adaptive capacity, substitutes traditional transformer tap, the dual-purpose source of welding current of the single-phase 220V/380V of controllable silicon, and power supply adopts 2 single-phase connecting lines; It is convenient to connect electrical network; Volume is little, and is in light weight, is more suitable for frequently moving occasion.Its principle is that at first line voltage is introduced into slow-start circuit 1, gets into inverter 3 through current rectifying and wave filtering circuit 2 backs then; Wherein, Current rectifying and wave filtering circuit 2 output dc voltage signals get into auxiliary power circuit 4; Auxiliary power circuit 4 work output ± 12V and+24V; Voltage sampling circuit 6 is sampled from auxiliary power circuit 4 and the supply voltage corresponding voltage signal, gets into multiplication of voltage control circuit 7, and whether multiplication of voltage control circuit 7 output control signal control voltage-multiplying circuits 5 work.
When line voltage is AC160V～AC250V, voltage-multiplying circuit 5 will be worked, and line voltage gets into current rectifying and wave filtering circuit 2 after improving twice, and the DC voltage of filtering gained gets into inverter 3; When line voltage was AC250V～AC460V, voltage-multiplying circuit 5 was not worked, and line voltage directly gets into inverters 3 through current rectifying and wave filtering circuit 2.
Referring to shown in Figure 2; When welding machine was started shooting, line voltage was introduced into slow-start circuit 1, and this slow-start circuit 1 comprises switching tube Q1; Be arranged at the electrochemical capacitor C18 between switching tube Q1 base stage and the emitter stage, be arranged at switching tube Q1 base stage and collector diode D11 and diode D12; With diode D12 parallel resistor R22; The relay K 2 parallelly connected, and the thermistor RR1 parallelly connected with relay K 2 with diode D11; Line voltage is given electrochemical capacitor C1, C2 charging through thermistor RR1, starts shooting after 1～2 second, and relay K 2 closures, line voltage gets into current rectifying and wave filtering circuit 2 through relay K 2, and the overshoot of can avoiding like this starting shooting causes machine breakdown.Current rectifying and wave filtering circuit 2 comprises rectifier bridge D1, electrochemical capacitor C1 and the electrochemical capacitor C2 parallelly connected with rectifier bridge D1; With electrochemical capacitor C1 parallel resistor R1, with electrochemical capacitor C2 parallel resistor R2.After line voltage got into current rectifying and wave filtering circuit 2, the DC voltage of rectification output got into inverter 3, required welding current and the weldingvoltage of inverter work output welding.Auxiliary power circuit 4 comprises transformer T1 and driver element, and the former limit of transformer T1 is one group, and the secondary of transformer T1 is made up of five groups of secondary, is connected with the RCD absorptive unit with the former limit of transformer T1, is connected with RC through resistance R 5 and RCD absorptive unit and stores the unit; Also comprise switching tube Q2, the base stage of this switching tube Q2 is connected with driver element, and colelctor electrode is connected with the RCD absorptive unit, and emitter stage is through resistance R 9 ground connection; Driver element is connected with secondary, and wherein secondary is specifically by first secondary, second secondary, and the 3rd secondary, fourth officer limit and the 5th secondary are formed; Driver element is provided with-the V pin, the R pin, the G pin and+24V pin etc.; Wherein+the 24V pin is connected with the fourth officer limit;-V pin is connected with the RCD absorptive unit through R6; The R pin is connected with the base stage of switching tube Q2.This auxiliary power circuit 4 obtains DC voltage from current rectifying and wave filtering circuit 2, auxiliary power circuit 4 work output ± 12V and+24V.Auxiliary power circuit 4 is made up of diode D3～D10, capacitor C 3～C15, resistance R 3～R10, transformer T1, switching tube Q2 and auxilliary electric module U1.Voltage sampling circuit 6 obtains voltage sampling signal from auxiliary power circuit 4, and this signal is corresponding with line voltage, and voltage sampling circuit 6 output control signals get into multiplication of voltage control circuit 7.Voltage sampling circuit 6 specifically is made up of capacitor C 16, C19, resistance R 11～R16, diode D14, switching tube Q5, chip U3.Voltage sampling signal is exported a voltage signal after getting into the inverting amplifier of being made up of U3A, capacitor C 16, C19, resistance R11, R12, and this voltage signal becomes positive correlation with line voltage.This voltage signal gets into the comparator of being made up of R13～R15 and U3B and compares, and when line voltage was AC160V～AC250V, comparator was exported high level, when line voltage is AC250V～AC460V, and the comparator output low level.The parallelly connected interlock circuit of forming by R16, D14 and switching tube Q5 again, when comparator output high level, the D14 conducting, the 5 pin current potentials of U3B are elevated, and 6 pin of U3B can be lower than the 5 pin current potentials of U3B always; When the comparator output low level, Q5 is with conducting, and the 5 pin current potentials of U3B are dragged down, and 6 pin of U3B are the 5 pin current potentials of high U3B always.Promptly after comparator is exported a kind of state, will be locked into this state, and can not change along with the variation of line voltage.Can guarantee that like this voltage-multiplying circuit 5 repeat circuit K1 can be along with the voltage ripple of power network frequent movement, thereby guarantee the life-span of relay.Then get into multiplication of voltage control circuit 7 by voltage sampling circuit 6 output control signals.Multiplication of voltage control circuit 7 is by optocoupler U2, resistance R 17～R21, diode D13, electrochemical capacitor C17, and switching tube Q4 and switching tube Q3 form.When voltage sampling circuit 6 output control signals are high level, optocoupler U2 conducting, switching tube Q4 conducting then, the switching tube Q3 conducting of delaying time; Otherwise, when voltage sampling circuit 6 output control signals are low level, not conducting of switching tube Q3.Get into the voltage-multiplying circuit of forming by diode D2, relay K 1, electrochemical capacitor C1, electrochemical capacitor C2, resistance R 1 and resistance R 25 by multiplication of voltage control circuit 7 output multiplication of voltage control signals at last.When the switching tube Q3 of multiplication of voltage control circuit 7 conducting, relay K 1 closure of voltage-multiplying circuit 5, voltage-multiplying circuit work, line voltage gets into current rectifying and wave filtering circuit 2 after being enhanced twice; When not conducting of the switching tube Q3 of multiplication of voltage control circuit 7, the relay K 1 of voltage-multiplying circuit 5 is not closed, and voltage-multiplying circuit is not worked, and line voltage directly gets into current rectifying and wave filtering circuit 2.
The utility model successfully has been used for two voltage inversion direct current manual arc welding machines; Can operate as normal in line voltage AC160V～AC460V scope; When input voltage was AC220V, line voltage obtained the 622V direct current through voltage-multiplying circuit and current rectifying and wave filtering circuit and sends into inverter; When input voltage was AC380V, line voltage directly obtained the 537V direct current through current rectifying and wave filtering circuit and sends into inverter work.Welder performance is stable, reliable operation.
Above embodiment only is that the utility model is described, yet the utility model is not limited thereto.For the one of ordinary skilled in the art, also be regarded as the protection domain of the utility model not breaking away from various improvement outside the utility model thought range.
Claims (10)
1. a self adaptation inversion source of welding current comprises the slow-start circuit, the current rectifying and wave filtering circuit that is connected with the slow-start circuit, the inverter that is connected with current rectifying and wave filtering circuit; It is characterized in that: also comprise the auxiliary power circuit and the voltage-multiplying circuit that are connected with current rectifying and wave filtering circuit,, be arranged at the multiplication of voltage control circuit between voltage-multiplying circuit and the voltage sampling circuit with the voltage sampling circuit that the output of auxiliary power circuit is connected.
2. the self adaptation inversion source of welding current according to claim 1; It is characterized in that: said slow-start circuit comprises switching tube Q1; Be arranged at the electrochemical capacitor C18 between switching tube Q1 base stage and the emitter stage, be arranged at switching tube Q1 base stage and collector diode D11 and diode D12; With diode D12 parallel resistor R22; The relay K 2 parallelly connected, and the thermistor RR1 parallelly connected with relay K 2 with diode D11.
3. the self adaptation inversion source of welding current according to claim 2, it is characterized in that: said current rectifying and wave filtering circuit comprises rectifier bridge D1, electrochemical capacitor C1 and the electrochemical capacitor C2 parallelly connected with rectifier bridge D1; With electrochemical capacitor C1 parallel resistor R1, with electrochemical capacitor C2 parallel resistor R2.
4. the self adaptation inversion source of welding current according to claim 3; It is characterized in that: said auxiliary power circuit comprises transformer T1; The former limit of said transformer T1 is one group; The secondary of said transformer T1 is made up of many groups secondary, is connected with the RCD absorptive unit with the former limit of transformer T1, is connected with RC through resistance R 5 and RCD absorptive unit and stores the unit; Said auxiliary power circuit also comprises driver element, and switching tube Q2, and the base stage of said switching tube Q2 is connected with driver element, and colelctor electrode is connected with the RCD absorptive unit, and emitter stage is through resistance R 9 ground connection; Said driver element is connected with secondary.
5. the self adaptation inversion source of welding current according to claim 4 is characterized in that: said secondary is by first secondary, second secondary, and the 3rd secondary, fourth officer limit and the 5th secondary are formed; Said driver element is provided with-the V pin, R pin, G pin ,+24V pin; Said+24V pin is connected with the fourth officer limit; Said-V pin is connected with the RCD absorptive unit through R6; Said R pin is connected with the base stage of switching tube Q2.
6. the self adaptation inversion source of welding current according to claim 5 is characterized in that: said voltage sampling circuit is by inverting amplifier, and the comparator that is connected with inverting amplifier is formed.
7. the self adaptation inversion source of welding current according to claim 6 is characterized in that: said multiplication of voltage control circuit is by optocoupler U2, the switching tube Q4 that is connected with optocoupler U2, and the switching tube Q3 that is connected with switching tube Q4 forms.
8. the self adaptation inversion source of welding current according to claim 7; It is characterized in that: said voltage-multiplying circuit is by relay K 1; With relay K 1 diode connected in parallel D2, the electrochemical capacitor C1 that is connected with relay K 1, electrochemical capacitor C2, and form with electrochemical capacitor C1 and electrochemical capacitor C2 parallel resistor R1 and resistance R 2 respectively.
9. the self adaptation inversion source of welding current according to claim 8 is characterized in that: also be provided with parallelly connected interlock circuit on the said inverting amplifier.
10. the self adaptation inversion source of welding current according to claim 9 is characterized in that: said parallelly connected interlock circuit is by switching tube Q5, the R16 that is connected with the base stage of switching tube Q5, and the D14 that is connected with the emitter stage of switching tube Q5 forms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201738965U CN202162481U (en) | 2011-05-26 | 2011-05-26 | Self-adaptive inverter welding power source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201738965U CN202162481U (en) | 2011-05-26 | 2011-05-26 | Self-adaptive inverter welding power source |
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| CN202162481U true CN202162481U (en) | 2012-03-14 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480946A (en) * | 2013-09-24 | 2014-01-01 | 永康市帝普特科技有限公司 | Circuit structure of double-voltage welding machine |
| CN106051263A (en) * | 2016-06-20 | 2016-10-26 | 航天科工哈尔滨风华有限公司电站设备分公司 | Double-power-source intelligent electric executing mechanism |
| CN106270943A (en) * | 2016-10-17 | 2017-01-04 | 浙江普尔尼机电有限公司 | A kind of twin voltage input automatic switching control circuit being applied to electric welding machine |
| CN107425708A (en) * | 2017-08-04 | 2017-12-01 | 温岭阿凡达机电有限公司 | Auxiliary power circuit and its control method |
| CN109066961A (en) * | 2018-08-24 | 2018-12-21 | 上海沪工焊接集团股份有限公司 | A kind of welding machine dual power supply handover control system and method |
| CN111585300A (en) * | 2019-02-18 | 2020-08-25 | 台达电子企业管理（上海）有限公司 | Method for automatically identifying type of power grid and inverter device thereof |
| CN111992847A (en) * | 2020-08-27 | 2020-11-27 | 上海沪工焊接集团股份有限公司 | Control method and device for wide-voltage multifunctional arc welding machine and storage medium thereof |
-
2011
- 2011-05-26 CN CN2011201738965U patent/CN202162481U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480946A (en) * | 2013-09-24 | 2014-01-01 | 永康市帝普特科技有限公司 | Circuit structure of double-voltage welding machine |
| CN103480946B (en) * | 2013-09-24 | 2015-04-29 | 永康市帝普特科技有限公司 | Circuit structure of double-voltage welding machine |
| CN106051263A (en) * | 2016-06-20 | 2016-10-26 | 航天科工哈尔滨风华有限公司电站设备分公司 | Double-power-source intelligent electric executing mechanism |
| CN106270943A (en) * | 2016-10-17 | 2017-01-04 | 浙江普尔尼机电有限公司 | A kind of twin voltage input automatic switching control circuit being applied to electric welding machine |
| CN107425708A (en) * | 2017-08-04 | 2017-12-01 | 温岭阿凡达机电有限公司 | Auxiliary power circuit and its control method |
| CN109066961A (en) * | 2018-08-24 | 2018-12-21 | 上海沪工焊接集团股份有限公司 | A kind of welding machine dual power supply handover control system and method |
| CN109066961B (en) * | 2018-08-24 | 2020-10-30 | 上海沪工焊接集团股份有限公司 | Welding machine dual-power switching control system and method |
| US11192201B2 (en) | 2018-08-24 | 2021-12-07 | Shanghai Hugong Electric (Group) Co., Ltd. | Double-power-supply switching control system for a welding machine and method |
| CN111585300A (en) * | 2019-02-18 | 2020-08-25 | 台达电子企业管理（上海）有限公司 | Method for automatically identifying type of power grid and inverter device thereof |
| CN111585300B (en) * | 2019-02-18 | 2024-04-12 | 台达电子企业管理（上海）有限公司 | Method for automatically identifying type of power grid and inverter device thereof |
| CN111992847A (en) * | 2020-08-27 | 2020-11-27 | 上海沪工焊接集团股份有限公司 | Control method and device for wide-voltage multifunctional arc welding machine and storage medium thereof |
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Granted publication date: 20120314 |