CN101944765A - Dual-power automatic switching control device for electric welder - Google Patents
Dual-power automatic switching control device for electric welder Download PDFInfo
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- CN101944765A CN101944765A CN 201010531236 CN201010531236A CN101944765A CN 101944765 A CN101944765 A CN 101944765A CN 201010531236 CN201010531236 CN 201010531236 CN 201010531236 A CN201010531236 A CN 201010531236A CN 101944765 A CN101944765 A CN 101944765A
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Abstract
The invention discloses a dual-power automatic switching control device for an electric welder. The control device comprises a control transformer, an input voltage signal sampling unit, a signal processing unit and an output control circuit, wherein the control transformer is coupled to external voltage connected to the electric welder; the input voltage signal sampling unit is connected with a voltage output end of the control transformer; the signal processing unit is connected with the input voltage signal sampling unit; the output control circuit is connected with the signal processing unit; and the signal processing unit comprises a microprocessor, a first photoelectric coupler and a relay, wherein the microprocessor is connected with a signal output end of a voltage division circuit and is embedded with an executable code; the first photoelectric coupler is interactively connected with a microprocessor signal; the relay is connected with a control signal output end of the first photoelectric coupler; and a normally closed contact and a normally open contact of the relay are connected with a voltage transformation output end of the control transformer respectively. The dual-power automatic switching control device has the advantages of simple structure, low implementation cost, automatic dual-power switching, real-time control of the relay despite of the voltage state of a power grid due to detection of the power grid voltage, and capacity of implementing protection.
Description
Technical field
What the present invention relates to is the electric welding machine field, especially is applied to the duplicate supply control device of the inversion welding machine of different line voltages.
Background technology
Traditional electric welding machine can only be operated in a kind of electric network source or have the manual control switch to realize the manual switchover of line voltage, single electric network source can't be implemented under the multiple input power supply power supply occasion, single phase power supply, cause unbalanced power supply, influence its equipment work, manual switching simultaneously can't realize the automatic conversion of line voltage and can damage welding equipment that conventional direct-current inverter welding machine only is applicable to low voltage electric power system or high-pressure system separately.If the electric welding machine of high power-supply system is received on the low power-supply system, then welding machine can not be worked, if low power-supply system welding machine is received on the high power-supply system, then welding machine can burn in overvoltage, there is potential safety hazard, these situations all make the scope of application of electric welding machine reduce greatly, and this also is the drawback of prior art.
Be called as Chinese invention patent publication number " CN 101733516 " name " direct-current inverter welding machine " with dual supply voltage system patent disclosure a kind ofly comprise the supply voltage identification circuit that circuit connects, auxiliary power circuit, the inversion major loop, the electric current given circuit, and control circuit, this supply voltage identification circuit comprises the voltage sampling circuit that circuit connects, voltage identification circuit and relay circuit, this auxiliary power circuit comprises the rectification circuit that circuit connects, be equipped with volt circuit, power circuit, voltage sampling circuit sampling input voltage signal, voltage signal is input to the voltage identification circuit, 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, commutating voltage brought up to the commutating voltage of high voltage power supply.The voltage identification circuit of this patent disclosure and to be equipped with its structure of volt circuit very complicated, implementation cost is higher.
Summary of the invention
At above problem, technical problem to be solved by this invention is to overcome the deficiencies in the prior art, provides a kind of simple in structure, dual-power automatic switchover control device that is used for electric welding machine that implementation cost is lower, technical scheme of the present invention:
A kind of dual-power automatic switchover control device that is used for electric welding machine, comprise: with insert the control transformer that the electric welding machine external voltage is of coupled connections, the input voltage signal sampling unit that is connected with this control transformer voltage output end, with the signal processing unit that this input voltage signal sampling unit is connected, the output control circuit that is connected with signal processing unit;
Wherein, described input voltage signal sampling unit comprises: the bridge rectifier that is connected with described control control transformer T1 voltage output end, the filter that is connected with this bridge rectifier rectification output end, the bleeder circuit that is connected with this filter filtering output;
Described signal processing unit comprises: with described bleeder circuit signal output part microprocessor that be connected, that be built-in with executable code, first photoelectrical coupler that is connected alternately with this microprocessor signals, with the relay that this first photoelectrical coupler control signal output ends is connected, the normally-closed contact of this relay is connected with control transformer transformation output respectively with normally opened contact;
Described output control circuit comprises: with second photoelectrical coupler that described microprocessor signals output is connected, the signal output part of this second photoelectrical coupler is connected with the electric welding machine inverter.
The present invention adopts: with insert the control transformer that the electric welding machine external voltage is of coupled connections, the input voltage signal sampling unit that is connected with this control transformer voltage output end, with the signal processing unit that this input voltage signal sampling unit is connected, the output control circuit that is connected with signal processing unit; Described signal processing unit comprises: with described bleeder circuit signal output part microprocessor that be connected, that be built-in with executable code, first photoelectrical coupler that is connected alternately with this microprocessor signals, with the relay that this first photoelectrical coupler control signal output ends is connected, the normally-closed contact of this relay is connected with control transformer transformation output respectively with normally opened contact; The present invention is simple in structure, and implementation cost is low, has realized the duplicate supply automatic switchover, detects by the enforcement to line voltage, and no matter line voltage is operated in the sort of voltage status, realizes the real-time control to relay, and can realize protection.
Description of drawings
Fig. 1. the circuit theory diagrams of the embodiment of the dual-power automatic switchover control device that is used for electric welding machine of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is carried out describing in detail in the present embodiment below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 1, comprise: with insert the control transformer T1 that the electric welding machine external voltage is of coupled connections, the input voltage signal sampling unit that is connected with this control transformer T1 voltage output end, with the signal processing unit that this input voltage signal sampling unit is connected, the output control circuit that is connected with signal processing unit;
Wherein, described input voltage signal sampling unit comprises: the bridge rectifier that is connected with described control control transformer T1 voltage output end, the filter that is connected with this bridge rectifier rectification output end, the bleeder circuit that is connected with this filter filtering output;
Described signal processing unit comprises: with described bleeder circuit signal output part microprocessor U1 that be connected, that be built-in with executable code, the first photoelectrical coupler U2 that is connected alternately with this microprocessor U1 signal, with the relay K 1 that this first photoelectrical coupler U2 control signal output ends is connected, the normally-closed contact of this relay K 1 is connected with control transformer T1 transformation output respectively with normally opened contact;
Described output control circuit comprises: with the second photoelectrical coupler U3 that described microprocessor U1 signal output part is connected, the signal output part of this second photoelectrical coupler U3 is connected with the electric welding machine inverter.
In this embodiment, described control transformer T1 comprises: first lead-out terminal 1 ", second lead-out terminal 2 ", the 3rd lead-out terminal 3 " three lead-out terminals.
In this embodiment, in the described input voltage signal sampling unit, described bridge rectifier is by first, second, the 3rd, the 4th diode D1, D2, D3, D4 forms, described filter is filter capacitor C1, the positive pole of this filter capacitor C1 is connected with the negative pole of this first diode D1 and the 3rd diode D3, described bleeder circuit is the circuit that the first divider resistance R1 and the second divider resistance R2 compose in parallel, the positive pole of described filter capacitor C1 is connected and is inserted the positive pole of the second diode D2 and the 4th diode D4 behind the second divider resistance R2 again by the first divider resistance R1, is connected with microprocessor U1 after the first divider resistance R1 and the second divider resistance R2 parallel connection.
In this embodiment, in the described signal processing unit, described microprocessor comprises: the voltage signal input pin 24 that is connected with described bleeder circuit, the input output pin 27 that is connected with the described first photoelectrical coupler U2, the signal processing results output pin 28 that is connected with the second photoelectrical coupler U3.
In this embodiment, described signal processing unit also comprises: the 3rd resistance R 3, the 5th diode D5, the described first photoelectrical coupler U2 comprises first, second, third, fourth pin 1,2,3,4, described input output pin 27 is connected with first pin 1 of the described first photoelectrical coupler U2 by the 3rd resistance R 3, second, third pin 2,3 ground connection of the described first photoelectrical coupler U2, the 4th pin 4 of the described first photoelectrical coupler U2 is connected with relay K 1 with the positive pole of the 5th diode D5.
In this embodiment, in the described signal processing unit, described relay K 1 comprises: normally-closed contact 2 ' and normally opened contact 3 ', first relay K 1 are switched pin 1 ', working power inserts pin 5 ', control signal input pin 4 '; The 4th pin 4 of the described first photoelectrical coupler U2 is connected with the control signal input pin 4 ' of the positive pole of the 5th diode D5 and relay K 1, the working power of this relay K 1 inserts pin 5 ' and is connected cut-in operation power supply in back with the negative pole of the 5th diode D5, described first relay K 1 is switched pin 1 ' and is connected with the positive pole of the first diode C1, second lead-out terminal 2 of this first relay K, 1 normally-closed contact 2 ' and described control transformer T1 " be connected first lead-out terminal 1 of described this first relay K, 1 normally opened contact 3 ' and described control transformer T1 " be connected.
In this embodiment, described output control circuit also comprises the 4th resistance R 4 that is connected with the signal processing results output pin 28 of described microprocessor, the described second photoelectrical coupler U3 comprises 11,22,33,44 4 pins of the 4th, the 5th, the 6th, the 7th pin, the 4th pin 11 of the described second photoelectrical coupler U3 is connected in series with described the 4th resistance R 4, the 5th pin 22 of the described second photoelectrical coupler U3 and the 6th pin 33 ground connection, the 7th pin 44 of this second photoelectrical coupler U3 is connected with the electric welding machine inverter.
The present invention has realized the duplicate supply automatic switchover on the single power supply major loop of original electric welding machine; detect by enforcement line voltage; no matter line voltage is operated in the sort of voltage status; realization is to the real-time control of relay K 1; can realize the needed power supply quality of electric welding machine; simultaneously line voltage can be judged whether normally or whether unusual, and protection can be realized according to the data result of sampling.
The above only is preferred embodiment of the present invention, in order to restriction invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. dual-power automatic switchover control device that is used for electric welding machine, comprise: with insert the control transformer that the electric welding machine external voltage is of coupled connections, the input voltage signal sampling unit that is connected with this control transformer voltage output end, with the signal processing unit that this input voltage signal sampling unit is connected, the output control circuit that is connected with signal processing unit;
It is characterized in that, described input voltage signal sampling unit comprises: the bridge rectifier that is connected with described control control transformer voltage output end, the filter that is connected with this bridge rectifier rectification output end, the bleeder circuit that is connected with this filter filtering output;
Described signal processing unit comprises: with described bleeder circuit signal output part microprocessor that be connected, that be built-in with executable code, first photoelectrical coupler that is connected alternately with this microprocessor signals, with the relay that this first photoelectrical coupler control signal output ends is connected, the normally-closed contact of this relay is connected with control transformer transformation output respectively with normally opened contact;
Described output control circuit comprises: with second photoelectrical coupler that described microprocessor signals output is connected, the signal output part of this second photoelectrical coupler is connected with the electric welding machine inverter.
2. the dual-power automatic switchover control device that is used for electric welding machine according to claim 1 is characterized in that, described control transformer comprises: first lead-out terminal, second lead-out terminal, three lead-out terminals of the 3rd lead-out terminal.
3. the dual-power automatic switchover control device that is used for electric welding machine according to claim 2, it is characterized in that, in the described input voltage signal sampling unit, described bridge rectifier is by first, second, the 3rd, the 4th diode is formed, described filter is a filter capacitor, the positive pole of this filter capacitor is connected with the negative pole of this first diode and the 3rd diode, described bleeder circuit is the circuit that first divider resistance and second divider resistance compose in parallel, the positive pole of described filter capacitor is connected and is inserted the positive pole of second diode and the 4th diode behind second divider resistance again by first divider resistance, is connected with microprocessor after first divider resistance and the second divider resistance parallel connection.
4. the dual-power automatic switchover control device that is used for electric welding machine according to claim 3, it is characterized in that, in the described signal processing unit, described microprocessor comprises: the voltage signal input pin that is connected with described bleeder circuit, the input output pin that is connected with described first photoelectrical coupler, the signal processing results output pin that is connected with second photoelectrical coupler.
5. the dual-power automatic switchover control device that is used for electric welding machine as claimed in claim 4, it is characterized in that, described signal processing unit also comprises: the 3rd resistance, the 5th diode, described first photoelectrical coupler comprises first, second, third, fourth pin, described input output pin is connected with first pin of described first photoelectrical coupler by the 3rd resistance, second, third pin ground connection of described first photoelectrical coupler, the 4th pin of described first photoelectrical coupler is connected with relay with the positive pole of the 5th diode.
6. the dual-power automatic switchover control device that is used for electric welding machine as claimed in claim 5, it is characterized in that, in the described signal processing unit, described relay comprises: normally-closed contact and normally opened contact, first relay switch pin, working power inserts pin, control signal input pin; The 4th pin of described first photoelectrical coupler is connected with the control signal input pin of the positive pole of the 5th diode and relay, the working power of this relay inserts pin and is connected cut-in operation power supply in back with the negative pole of the 5th diode, described first relay switches pin and is connected with the positive pole of first diode, this first relay normally-closed contact is connected with second lead-out terminal of described control transformer, and first lead-out terminal of described this first relay normally open contact and described control transformer is connected.
7. the dual-power automatic switchover control device that is used for electric welding machine as claimed in claim 6, it is characterized in that, described output control circuit also comprises the 4th resistance that is connected with the signal processing results output pin of described microprocessor, described second photoelectrical coupler comprises four pins of the 4th, the 5th, the 6th, the 7th pin, the 4th pin of described second photoelectrical coupler is connected in series with described the 4th resistance, the 5th pin of described second photoelectrical coupler and the 6th pin ground connection, the 7th pin of this second photoelectrical coupler is connected with the electric welding machine inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010531236 CN101944765A (en) | 2010-11-04 | 2010-11-04 | Dual-power automatic switching control device for electric welder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010531236 CN101944765A (en) | 2010-11-04 | 2010-11-04 | Dual-power automatic switching control device for electric welder |
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| CN101944765A true CN101944765A (en) | 2011-01-12 |
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| CN 201010531236 Pending CN101944765A (en) | 2010-11-04 | 2010-11-04 | Dual-power automatic switching control device for electric welder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801205A (en) * | 2011-05-25 | 2012-11-28 | 深圳市富驰机电设备有限公司 | Dual-voltage power supply circuit and inverter welding machine comprising same |
| 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 |
| CN103970038A (en) * | 2013-02-05 | 2014-08-06 | 上海西门子医疗器械有限公司 | Compressor control circuit and medical device |
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| CN2915348Y (en) * | 2006-05-29 | 2007-06-27 | 孟蒙 | Electric welding machine with input voltage self-adaptive circuit |
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| CN201839071U (en) * | 2010-11-04 | 2011-05-18 | 深圳市华意隆实业发展有限公司 | Double-power supply automatic switching control device for electric welding machine |
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2010
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| CN2915348Y (en) * | 2006-05-29 | 2007-06-27 | 孟蒙 | Electric welding machine with input voltage self-adaptive circuit |
| CN201017216Y (en) * | 2007-03-29 | 2008-02-06 | 陈仁富 | Double electric voltages self-adaptive controllers used for arc welder |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801205A (en) * | 2011-05-25 | 2012-11-28 | 深圳市富驰机电设备有限公司 | Dual-voltage power supply circuit and inverter welding machine comprising same |
| CN102801205B (en) * | 2011-05-25 | 2015-05-27 | 深圳市中智投资有限公司 | Dual-voltage power supply circuit and inverter welding machine comprising same |
| CN103970038A (en) * | 2013-02-05 | 2014-08-06 | 上海西门子医疗器械有限公司 | Compressor control circuit and medical device |
| CN103970038B (en) * | 2013-02-05 | 2017-07-14 | 上海西门子医疗器械有限公司 | Compression device controls circuit and Medical Devices |
| 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 |
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Application publication date: 20110112 |