CN202667881U - Energy-saving anti-electric shock protection circuit of inverted direct-current welding machine - Google Patents
Energy-saving anti-electric shock protection circuit of inverted direct-current welding machine Download PDFInfo
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- CN202667881U CN202667881U CN 201220397351 CN201220397351U CN202667881U CN 202667881 U CN202667881 U CN 202667881U CN 201220397351 CN201220397351 CN 201220397351 CN 201220397351 U CN201220397351 U CN 201220397351U CN 202667881 U CN202667881 U CN 202667881U
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Abstract
The utility model discloses an energy-saving anti-electric shock protection circuit of an inverted direct-current welding machine, which comprises a voltage comparator, a first bleeder circuit and a second bleeder circuit, wherein a non-inverting input end of the voltage comparator is connected with the first bleeder circuit; an inverting input end of the voltage comparator is connected with the second bleeder circuit; and an output end of the voltage comparator is connected with a pulse-width modulation controller. The energy-saving anti-electric shock protection circuit of the inverted direct-current welding machine utilizes a voltage feedback signal of a positive pole of the welding machine, controls the welding machine to operate or not by a logical judgment of the pulse-width modulation controller, and has the characteristics of simple structure and simple and convenient control mode. When the welding machine is not used for welding, no-load voltage is always not greater than 24V, the pulse-width modulation controller and a power tube of the welding machine are in an off state, and only components such as a supply transformer, a rectifier bridge, a fan and an indicator gauge are in operating states, so that energy is saved, the no-load ratio is reduced to some extent, the safety performance is improved, and the risk of electric shock of a worker does not occur.
Description
Technical field
The utility model relates to direct-current inverter welding machine, is specifically related to the energy-saving electric shock-proof holding circuit of direct-current inverter welding machine.
Background technology
Most of high-frequency inverter-type welder of at present user's use, it is the overall work that core technology is controlled welding machine that internal structure adopts PWM more, along with the dual test of technology and practice, the inverter type welder technology is constantly upgraded according to the requirement in market.Most of inverter type welder on the market also exists open circuit loss high, and unloaded output voltage is high, and the margin of power is not enough, the problems such as poor reliability.As time goes on, the requirement of market butt welding machine is also more and more higher, particularly security, the energy-conservation and stable mainstream technology of pursuing in the market that becomes.
The utility model content
The purpose of this utility model is to provide a kind of energy-saving electric shock-proof holding circuit of direct-current inverter welding machine, and this circuit structure is simple, and the energy-saving electric shock-proof effect is better.
The utility model to achieve these goals, the technical solution of employing is:
The energy-saving electric shock-proof holding circuit of direct-current inverter welding machine; comprise voltage comparator, the first bleeder circuit, reach the second bleeder circuit; the in-phase input end of voltage comparator connects the first bleeder circuit, and inverting input connects the second bleeder circuit, and output connects PDM keyer.
Preferably, described the first bleeder circuit comprises the first resistance and the second resistance that is in series, and the in-phase input end of voltage comparator is connected with the common port of the first resistance with the second resistance.
Preferably, described the second bleeder circuit comprises the 3rd resistance that is in series, the 4th resistance, the 5th resistance, and the 6th resistance, and the inverting input of voltage comparator is connected with the common port of the 4th resistance with the 5th resistance.
Preferably, the common port of described the 3rd resistance and the 4th resistance connects the welding machine positive pole.
Preferably, be connected with the first diode and the second diode on described the second bleeder circuit, the output of voltage comparator is connected with the 3rd diode.
Preferably, the in-phase input end current potential of Light Condition voltage comparator is lower than the anti-phase input terminal potential.
The beneficial effects of the utility model:
Whether the energy-saving electric shock-proof holding circuit of direct-current inverter welding machine is to utilize the voltage feedback signal of welding machine positive pole, judge to control inverter type welder by the logic of PDM keyer and work, have simple in structure, the characteristics that control mode is easy.When welding machine does not weld, no matter control whether switch of potentiometer, floating voltage is not higher than 24V all the time, and PDM keyer and welder power pipe are in closed condition.Only have the components and parts such as power transformer, rectifier bridge, blower fan, display list in running order, this has not only greatly reduced open circuit loss, has saved the energy, has also reduced to a certain extent no-load ratio, has improved security performance, and the danger that the workman gets an electric shock can not occur.
Description of drawings
Fig. 1 is the circuit theory diagrams of the energy-saving electric shock-proof holding circuit of direct-current inverter welding machine.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is elaborated:
In conjunction with Fig. 1; the energy-saving electric shock-proof holding circuit of direct-current inverter welding machine; comprise voltage comparator A, the first bleeder circuit, reach the second bleeder circuit; the in-phase input end of voltage comparator A connects the first bleeder circuit; inverting input connects the second bleeder circuit, and output connects PDM keyer.
The first bleeder circuit comprises the first resistance R 1 and the second resistance R 2 that is in series, and the in-phase input end of voltage comparator is connected with the common port of the first resistance R 1 and the second resistance R 2.The second bleeder circuit comprises the 3rd resistance R 3 that is in series, the 4th resistance R 4, the 5th resistance R 5, and the 6th resistance R 6, and the inverting input of voltage comparator A is connected with the common port of the 4th resistance R 4 and the 5th resistance R 5.It is anodal that the common port of the 3rd resistance R 3 and the 4th resistance R 4 connects welding machine.Be connected with the first diode D1 and the second diode D2 on the second bleeder circuit, the output of voltage comparator A is connected with the 3rd diode D3.The in-phase input end current potential of Light Condition voltage comparator is lower than the anti-phase input terminal potential.
Whether the energy-saving electric shock-proof holding circuit of direct-current inverter welding machine is to utilize the voltage feedback signal of welding machine positive pole, judge to control inverter type welder by the logic of PDM keyer and work, have simple in structure, the characteristics that control mode is easy.
When welding machine does not weld, the in-phase input end current potential of voltage comparator is lower than the anti-phase input terminal potential, the output output low level, and PDM keyer is closed, measuring the welding machine output voltage is the common port of the 3rd resistance and the 4th resistance and the voltage between the negative pole, is 24 volts.When welding machine welded, voltage comparator anti-phase input terminal potential reduced owing to welding rod contacts with weldment, and the in-phase input end current potential is constant, and was higher than the anti-phase input terminal potential, output output high level, PDM keyer normal operation.
As seen when welding machine does not weld, no matter control whether switch of potentiometer, floating voltage is not higher than 24V all the time, and PDM keyer and welder power pipe are in closed condition.Only have the components and parts such as power transformer, rectifier bridge, blower fan, display list in running order, this has not only greatly reduced open circuit loss, has saved the energy, has also reduced to a certain extent no-load ratio, has improved security performance, and the danger that the workman gets an electric shock can not occur.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement also should belong to protection domain of the present utility model.
Claims (6)
1. the energy-saving electric shock-proof holding circuit of direct-current inverter welding machine; it is characterized in that; comprise voltage comparator, the first bleeder circuit, reach the second bleeder circuit; the in-phase input end of voltage comparator connects the first bleeder circuit; inverting input connects the second bleeder circuit, and output connects PDM keyer.
2. the energy-saving electric shock-proof holding circuit of direct-current inverter welding machine according to claim 1; it is characterized in that; described the first bleeder circuit comprises the first resistance and the second resistance that is in series, and the in-phase input end of voltage comparator is connected with the common port of the first resistance with the second resistance.
3. the energy-saving electric shock-proof holding circuit of direct-current inverter welding machine according to claim 1; it is characterized in that; described the second bleeder circuit comprises the 3rd resistance that is in series, the 4th resistance, the 5th resistance, and the 6th resistance, and the inverting input of voltage comparator is connected with the common port of the 4th resistance with the 5th resistance.
4. the energy-saving electric shock-proof holding circuit of direct-current inverter welding machine according to claim 3 is characterized in that, it is anodal that the common port of described the 3rd resistance and the 4th resistance connects welding machine.
5. according to claim 1 to the energy-saving electric shock-proof holding circuit of 4 each described direct-current inverter welding machines, it is characterized in that be connected with the first diode and the second diode on described the second bleeder circuit, the output of voltage comparator is connected with the 3rd diode.
6. the energy-saving electric shock-proof holding circuit of direct-current inverter welding machine according to claim 5 is characterized in that, the in-phase input end current potential of Light Condition voltage comparator is lower than the anti-phase input terminal potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220397351 CN202667881U (en) | 2012-08-10 | 2012-08-10 | Energy-saving anti-electric shock protection circuit of inverted direct-current welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220397351 CN202667881U (en) | 2012-08-10 | 2012-08-10 | Energy-saving anti-electric shock protection circuit of inverted direct-current welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202667881U true CN202667881U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220397351 Expired - Fee Related CN202667881U (en) | 2012-08-10 | 2012-08-10 | Energy-saving anti-electric shock protection circuit of inverted direct-current welding machine |
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| CN (1) | CN202667881U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104741748A (en) * | 2015-02-11 | 2015-07-01 | 上海广为焊接设备有限公司 | Control system for reducing inverter-type plasma cutting machine secondary side floating voltage |
| CN111618394A (en) * | 2020-05-23 | 2020-09-04 | 上海沪工焊接集团股份有限公司 | Electric shock prevention control circuit of inverter welding machine |
-
2012
- 2012-08-10 CN CN 201220397351 patent/CN202667881U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104741748A (en) * | 2015-02-11 | 2015-07-01 | 上海广为焊接设备有限公司 | Control system for reducing inverter-type plasma cutting machine secondary side floating voltage |
| CN104741748B (en) * | 2015-02-11 | 2017-01-11 | 上海广为焊接设备有限公司 | Control system for reducing inverter-type plasma cutting machine secondary side floating voltage |
| CN111618394A (en) * | 2020-05-23 | 2020-09-04 | 上海沪工焊接集团股份有限公司 | Electric shock prevention control circuit of inverter welding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20210810 |