CN204126938U - The draught fan control circuit of welding machine - Google Patents
The draught fan control circuit of welding machine Download PDFInfo
- Publication number
- CN204126938U CN204126938U CN201420575629.4U CN201420575629U CN204126938U CN 204126938 U CN204126938 U CN 204126938U CN 201420575629 U CN201420575629 U CN 201420575629U CN 204126938 U CN204126938 U CN 204126938U
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- CN
- China
- Prior art keywords
- resistance
- welding machine
- control circuit
- operational amplifier
- connects
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Abstract
The utility model discloses a kind of draught fan control circuit of welding machine, comprise the current feedback signal for receiving in welding machine and the feedback amplifier carrying out amplifying, for judge according to the current feedback signal after amplifying welding machine whether exist load load judgment circuit, for detecting the temperature sensing circuit of the temperature variation in welding machine and the running control circuit for the working state that controls welding machine inner blower; The blower fan that described running control circuit controls in welding machine when the welding machine temperature existed in load or welding machine exceedes preset temperature is started working, otherwise the blower fan that described running control circuit controls in welding machine quits work; Described feedback amplifier connects described load judgment circuit, and described load judgment circuit is connected described running control circuit with described temperature sensing circuit.The utility model can control fan operation and stopping flexibly, can reach energy-conservation effect again, reduces the loss of power grid energy.
Description
Technical field
The utility model relates to the blower fan technical field of inverter type welder, particularly relates to a kind of draught fan control circuit of welding machine.
Background technique
Increasingly mature along with inverter welding machine technology, due to its little, lightweight relative to traditional welding machine volume and energy-conservation etc. plurality of advantages, its using scope is also more and more wider.Meanwhile, the utilization ratio of inverter type welder energy consumption is had higher requirement.No matter conventional draught fan control circuit, as long as welding machine start the machine air blower is just started working, is load condition or unloaded state, and welding machine energy loss under unloaded idle state is increased, and obvious like this have energy to be greatly wasted.
Model utility content
Based on this, be necessary the draught fan control circuit that a kind of welding machine is provided.
Its technological scheme is as follows: a kind of draught fan control circuit of welding machine, comprise the current feedback signal for receiving in welding machine and the feedback amplifier carrying out amplifying, for judge according to the current feedback signal after amplifying welding machine whether exist load load judgment circuit, for detecting the temperature sensing circuit of the temperature variation in welding machine and the running control circuit for the working state that controls welding machine inner blower;
The blower fan that described running control circuit controls in welding machine when the welding machine temperature existed in load or welding machine exceedes preset temperature is started working, otherwise the blower fan that described running control circuit controls in welding machine quits work;
Described feedback amplifier connects described load judgment circuit, and described load judgment circuit is connected described running control circuit with described temperature sensing circuit.
Wherein in an embodiment, described feedback amplifier comprises the second operational amplifier, the 6th resistance, the 8th resistance and the 9th resistance;
One end of described 6th resistance is for receiving the current feedback signal in welding machine, the other end of described 6th resistance connects the in-phase input end of described second operational amplifier, the inverting input of described second operational amplifier connects one end of described 8th resistance and one end of described 9th resistance, the other end ground connection of described 9th resistance, the other end of described 8th resistance connects the output terminal of described second operational amplifier, and the output terminal of described second operational amplifier connects described load judgment circuit.
Wherein in an embodiment, described load judgment circuit comprises the 7th resistance and the 3rd operational amplifier;
One end of described 7th resistance connects described feedback amplifier, the other end of described 7th resistance connects the in-phase input end of described 3rd operational amplifier, the inverting input of described 3rd operational amplifier connects preset reference voltage, and the output terminal of described 3rd operational amplifier connects described running control circuit.
Wherein in an embodiment, described temperature sensing circuit comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, DC electrical source, the first electric capacity and the first operational amplifier;
One end of described first resistance connects described DC electrical source, the other end of described first resistance connects one end of described second resistance and the inverting input of described first operational amplifier, the other end ground connection of described second resistance, the in-phase input end of described first operational amplifier connects one end of described first electric capacity, one end of described 3rd resistance, one end of described 4th resistance and one end of described 5th resistance, the other end of described 3rd resistance connects described DC electrical source, the other end ground connection of described 5th resistance, the other end of described first electric capacity is connected the output terminal of described first operational amplifier with the other end of described 4th resistance, the output terminal of described first operational amplifier connects described running control circuit.
Wherein in an embodiment, described second resistance is thermistor.
Wherein in an embodiment, described running control circuit comprises the 12 resistance and the first triode;
One end of described 12 resistance connects described temperature sensing circuit and described load judgment circuit, the other end of described 12 resistance connects the base stage of described first triode, the grounded-emitter connection of described first triode, the collector electrode of described first triode connects the blower fan in welding machine.
Wherein in an embodiment, described load judgment circuit also comprises the second diode, and the output terminal of described 3rd operational amplifier connects described running control circuit by described second diode.
Wherein in an embodiment, described temperature sensing circuit also comprises the first diode, and the output terminal of described first operational amplifier connects described running control circuit by described first diode.
Wherein in an embodiment, the output terminal of described first operational amplifier connects the positive pole of described first diode, and the negative pole of described first diode connects described running control circuit.
Wherein in an embodiment, described first operational amplifier is TTL type operational amplifier or CMOS type operational amplifier.
Below the advantage of the technical program or principle are described.
During welding machine start work, the current feedback signal of generation amplifies through feedback amplifier, then through comparing output level with preset reference signal; When welding machine internal power component temperature changes, temperature sensing circuit can compare with preset temperature and export another one level.Above two kinds of level signal co-controlling fan operations and stopping.The utility model can control fan operation and stopping flexibly, can reach energy-conservation effect again, reduces the loss of power grid energy.
Accompanying drawing explanation
Fig. 1 is the structural representation of the draught fan control circuit of welding machine in the utility model embodiment;
Fig. 2 is the circuit diagram of the utility model embodiment.
Description of reference numerals: 10, feedback amplifier, 20, load judgment circuit, 30, temperature sensing circuit, 40, running control circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described in detail.
Referring to Fig. 1, is the structural representation of the draught fan control circuit of welding machine in the utility model embodiment.
A draught fan control circuit for welding machine, comprise the current feedback signal for receiving in welding machine and the feedback amplifier 10 carrying out amplifying, for judge according to the current feedback signal after amplifying welding machine whether exist load load judgment circuit 20, for detecting the temperature sensing circuit 30 of the temperature variation in welding machine and the running control circuit 40 for the working state that controls welding machine inner blower;
The blower fan that described running control circuit 40 controls in welding machine when the welding machine temperature existed in load or welding machine exceedes preset temperature is started working, otherwise the blower fan that described running control circuit 40 controls in welding machine quits work;
Described feedback amplifier 10 connects described load judgment circuit 20, and described load judgment circuit 20 is connected described running control circuit 40 with described temperature sensing circuit 30.
Particularly, referring to Fig. 2, is the circuit diagram of the utility model embodiment.
It is worthy of note, the label in Fig. 2 does not use subscript, but each label in specification and each label in Fig. 2 have one-to-one relationship, such as, U in specification
2u2 in corresponding diagram 2, the R in specification
6r6 in corresponding diagram 2, and the C in specification
1c1 in corresponding diagram 2, by that analogy.At this, repeat no more.
Wherein in an embodiment, described feedback amplifier comprises the second operational amplifier U
2, the 6th resistance R
6, the 8th resistance R
8with the 9th resistance R
9;
Described 6th resistance R
6one end for receiving the current feedback signal in welding machine, described 6th resistance R
6the other end connect described second operational amplifier U
2in-phase input end, described second operational amplifier U
2inverting input connect described 8th resistance R
8one end and described 9th resistance R
9one end, described 9th resistance R
9the other end ground connection, described 8th resistance R
8the other end connect described second operational amplifier U
2output terminal, described second operational amplifier U
2output terminal connect described load judgment circuit (in Fig. 2, described second operational amplifier U
2output terminal connect the 7th resistance R described in described load judgment circuit
7one end).
Wherein in an embodiment, described load judgment circuit comprises the 7th resistance R
7with the 3rd operational amplifier U
3;
Described 7th resistance R
7one end connect described feedback amplifier, described 7th resistance R
7the other end connect described 3rd operational amplifier U
3in-phase input end, described 3rd operational amplifier U
3inverting input connect preset reference voltage (also i.e. V in figure
rEF), described 3rd operational amplifier U
3output terminal connect described running control circuit (in Fig. 2, described 3rd operational amplifier U
3output terminal connect described second diode D
2positive pole, described second diode D
2negative pole connect the 12 resistance R described in described running control circuit
12one end).
Described load judgment circuit also comprises the second diode D
2, described 3rd operational amplifier U
3output terminal by described second diode D
2connect described running control circuit.
During welding machine start welding, the current feedback signal of generation amplifies through feedback amplifier, then with preset reference voltage V
rEFcompare and judge whether welding machine has load to export: when there being load current to export, U
3just export high level, when welding machine is at unloaded no-output electric current, U
3output low level.
Wherein in an embodiment, described temperature sensing circuit comprises the first resistance R
1, the second resistance R
2, the 3rd resistance R
3, the 4th resistance R
4, the 5th resistance R
5, DC electrical source VCC, the first electric capacity C
1with the first operational amplifier U
1;
Described first resistance R
1one end connect described DC electrical source VCC, described first resistance R
1the other end connect described second resistance R
2one end and described first operational amplifier U
1inverting input, described second resistance R
2the other end ground connection, described first operational amplifier U
1in-phase input end connect described first electric capacity C
1one end, described 3rd resistance R
3one end, described 4th resistance R
4one end and described 5th resistance R
5one end, described 3rd resistance R
3the other end connect described DC electrical source VCC, described 5th resistance R
5the other end ground connection, described first electric capacity C
1the other end and described 4th resistance R
4the other end connect described first operational amplifier U
1output terminal, described first operational amplifier U
1output terminal connect described running control circuit (in Fig. 2, described first operational amplifier U
1output terminal connect described first diode D
1positive pole, described first diode D
1negative pole connect the 12 resistance R described in described running control circuit
12one end).
Described second resistance R
2for thermistor.Described temperature sensing circuit also comprises the first diode D
1, described first operational amplifier U
1output terminal by described first diode D
1connect described running control circuit.
Described first operational amplifier U
1output terminal connect described first diode D
1positive pole, described first diode D
1negative pole connect described running control circuit.
Described first operational amplifier U
1for TTL type operational amplifier or CMOS type operational amplifier.
When the temperature variation of welding machine inside, thermistor R
2the voltage at two ends also changes thereupon, works as R
5the voltage at two ends is greater than R
2the U during voltage at two ends
1export high level, work as R
5the voltage at two ends is less than R
2the U during voltage at two ends
1output low level.By regulating R
5resistance, fan operation under different temperatures can be realized and control; By regulating R
4resistance, the out-of-work temperature value of blower fan can be set.
Wherein in an embodiment, described running control circuit comprises the 12 resistance R
12with the first triode Q
1; Described 12 resistance R
12one end connect described temperature sensing circuit and described load judgment circuit, described 12 resistance R
12the other end connect described first triode Q
1base stage, described first triode Q
1grounded-emitter connection, described first triode Q
1collector electrode connect blower fan in welding machine.
Described 12 resistance R
12one end connect the first diode D described in described temperature sensing circuit
1negative pole and described load judgment circuit described in the second diode D
2negative pole.
Use U
1and U
3the low and high level exported is by diode D
1, D
2(prevent U
1and U
3influence each other) conducting of co-controlling triode and cut-off, control blower fan efficiently, flexibly and normally work.Like this can at welder and welding machine internal power component temperature higher than making blower fan work during certain value, welding machine can be made again to quit work lower than during certain value at unloaded and welding machine internal power component temperature, thus reach the energy-conservation effect not affecting again welding machine reliability.
During welding machine start work, the current feedback signal of generation amplifies current feedback signal through feedback amplifier, then compares output low and high level through comparator and preset reference signal; When welding machine internal power component temperature is elevated to certain value, temperature sensing circuit also exports high level.The conducting of above two kinds of level co-controlling triodes and cut-off, reach efficiently, control fan operation and stopping flexibly.
Such as: 24V pressed by the blower fan of welding machine inside, 0.5A calculates, and a welding machine works one hour with regard to energy energy-conservation 4.3 degree of electricity every day, and 100 welding machines just can save 154800 degree of electricity for 1 year.Such energy-saving effect is not little.
U in Fig. 2
1, U
2and U
3all available TTL type amplifier or CMOS amplifier.Resistance in Fig. 2, electric capacity and diode can adopt general common components and parts.
Below advantage of the present utility model or principle are described.
During welding machine start work, the current feedback signal of generation amplifies through feedback amplifier, then through comparing output level with preset reference signal; When welding machine internal power component temperature changes, temperature sensing circuit can compare with preset temperature and export another one level.Above two kinds of level signal co-controlling fan operations and stopping.The utility model can control fan operation and stopping flexibly, can reach energy-conservation effect again, reduces the loss of power grid energy.
The above embodiment only have expressed several mode of execution of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (10)
1. the draught fan control circuit of a welding machine, it is characterized in that, comprise the current feedback signal for receiving in welding machine and the feedback amplifier carrying out amplifying, for judge according to the current feedback signal after amplifying welding machine whether exist load load judgment circuit, for detecting the temperature sensing circuit of the temperature variation in welding machine and the running control circuit for the working state that controls welding machine inner blower;
The blower fan that described running control circuit controls in welding machine when the welding machine temperature existed in load or welding machine exceedes preset temperature is started working, otherwise the blower fan that described running control circuit controls in welding machine quits work;
Described feedback amplifier connects described load judgment circuit, and described load judgment circuit is connected described running control circuit with described temperature sensing circuit.
2. the draught fan control circuit of welding machine according to claim 1, is characterized in that, described feedback amplifier comprises the second operational amplifier, the 6th resistance, the 8th resistance and the 9th resistance;
One end of described 6th resistance is for receiving the current feedback signal in welding machine, the other end of described 6th resistance connects the in-phase input end of described second operational amplifier, the inverting input of described second operational amplifier connects one end of described 8th resistance and one end of described 9th resistance, the other end ground connection of described 9th resistance, the other end of described 8th resistance connects the output terminal of described second operational amplifier, and the output terminal of described second operational amplifier connects described load judgment circuit.
3. the draught fan control circuit of welding machine according to claim 1, is characterized in that, described load judgment circuit comprises the 7th resistance and the 3rd operational amplifier;
One end of described 7th resistance connects described feedback amplifier, the other end of described 7th resistance connects the in-phase input end of described 3rd operational amplifier, the inverting input of described 3rd operational amplifier connects preset reference voltage, and the output terminal of described 3rd operational amplifier connects described running control circuit.
4. the draught fan control circuit of welding machine according to claim 1, is characterized in that, described temperature sensing circuit comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, DC electrical source, the first electric capacity and the first operational amplifier;
One end of described first resistance connects described DC electrical source, the other end of described first resistance connects one end of described second resistance and the inverting input of described first operational amplifier, the other end ground connection of described second resistance, the in-phase input end of described first operational amplifier connects one end of described first electric capacity, one end of described 3rd resistance, one end of described 4th resistance and one end of described 5th resistance, the other end of described 3rd resistance connects described DC electrical source, the other end ground connection of described 5th resistance, the other end of described first electric capacity is connected the output terminal of described first operational amplifier with the other end of described 4th resistance, the output terminal of described first operational amplifier connects described running control circuit.
5. the draught fan control circuit of welding machine according to claim 4, is characterized in that, described second resistance is thermistor.
6. the draught fan control circuit of welding machine according to claim 1, is characterized in that, described running control circuit comprises the 12 resistance and the first triode;
One end of described 12 resistance connects described temperature sensing circuit and described load judgment circuit, the other end of described 12 resistance connects the base stage of described first triode, the grounded-emitter connection of described first triode, the collector electrode of described first triode connects the blower fan in welding machine.
7. the draught fan control circuit of welding machine according to claim 3, is characterized in that, described load judgment circuit also comprises the second diode, and the output terminal of described 3rd operational amplifier connects described running control circuit by described second diode.
8. the draught fan control circuit of welding machine according to claim 4, is characterized in that, described temperature sensing circuit also comprises the first diode, and the output terminal of described first operational amplifier connects described running control circuit by described first diode.
9. the draught fan control circuit of welding machine according to claim 8, is characterized in that, the output terminal of described first operational amplifier connects the positive pole of described first diode, and the negative pole of described first diode connects described running control circuit.
10. the draught fan control circuit of welding machine according to claim 9, is characterized in that, described first operational amplifier is TTL type operational amplifier or CMOS type operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420575629.4U CN204126938U (en) | 2014-09-30 | 2014-09-30 | The draught fan control circuit of welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420575629.4U CN204126938U (en) | 2014-09-30 | 2014-09-30 | The draught fan control circuit of welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204126938U true CN204126938U (en) | 2015-01-28 |
Family
ID=52383297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420575629.4U Expired - Fee Related CN204126938U (en) | 2014-09-30 | 2014-09-30 | The draught fan control circuit of welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204126938U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107738021A (en) * | 2017-11-08 | 2018-02-27 | 浙江颐顿机电有限公司 | Fan intelligent cooling control circuit in a kind of inverter type welder |
-
2014
- 2014-09-30 CN CN201420575629.4U patent/CN204126938U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107738021A (en) * | 2017-11-08 | 2018-02-27 | 浙江颐顿机电有限公司 | Fan intelligent cooling control circuit in a kind of inverter type welder |
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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 |
Granted publication date: 20150128 Termination date: 20200930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |