CN204867869U - Turn over and swash small -size electric welding of formula based on UC3842 - Google Patents
Turn over and swash small -size electric welding of formula based on UC3842 Download PDFInfo
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- CN204867869U CN204867869U CN201520648261.4U CN201520648261U CN204867869U CN 204867869 U CN204867869 U CN 204867869U CN 201520648261 U CN201520648261 U CN 201520648261U CN 204867869 U CN204867869 U CN 204867869U
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Abstract
The utility model provides a turn over and swash small -size electric welding of formula based on UC3842 belongs to the welding machine field, including main circuit and control two parts, the main circuit includes rectifier module, filter module, high -frequency transformer module, rectifier module becomes rectified alternating current to ac inversion, filter module exchanges during filtering rectified alternating current presses, control section includes main control unit, PWM module, current feedback module, voltage feedback module, executable module, UC3842 carries out system analysis, logical decision and real time control to whole circuit for the main control unit, the PWM module is through changing the duty cycle to the switch control oil pipe, the duty cycle of current feedback module through change sampling and then control PWM to the electric current, the voltage feedback module is through sampling to voltage variation and then control PWM's duty cycle, time ratio, control transformer's state is opened, is closed to the executable module through the change switching element, the utility model discloses can make the electric welding in the no matter excessive pressure, under -voltage of when output, still overflow, the undercurrent, control that can both be automatic makes the welding machine recover normal operating conditions with adjusting.
Description
Technical field
The utility model belongs to electric welding machine field, is specifically related to a kind of inverse-excitation type miniature welding machine based on UC3842.
Background technology
In modern industry, electric welding machine is indispensable process equipment.Electric welding machine has consequence in machinery production and industrial circle, has the laudatory title of industrial sewing machine.In the industrial production, the stability that electric welding machine exports is necessary, because solder technology is a kind of accurate, reliable, permanent method for metal working, the core of electric welding machine is power supply, its quality directly can have influence on the quality of welding, reliability and operating efficiency, sometimes even relation engineering safety problem.It is unstable that electric welding machine on market exports, and in the size of current situation needed, can not settle out, and often occurs overcurrent, undercurrent and overvoltage, under-voltage situation, causes soldering opening to occur quality problems.
For the above situation, devise a kind of electric welding machine system of automatic regulation output herein, when output occurs deviation or is abnormal, automatic regulation output makes it in stable state.
Summary of the invention
The purpose of this utility model is to provide a kind of inverse-excitation type miniature welding machine based on UC3842, makes output stabilization, thus improves the quality of welding.
In order to achieve the above object, the technical scheme that the utility model adopts is:
Based on an inverse-excitation type miniature welding machine of UC3842, comprise main circuit and control two parts, main circuit part comprises rectification module, filtration module, high frequency transformer module, rectification module, filtration module.Control section comprises UC3842 master controller, and on described UC3842 master controller, link block comprises PWM module, current feedback module, voltage feedback module, Executive Module, and described PWM module is connected with UC3842 master controller and Executive Module; Described current feedback module is connected with UC3842 master controller and transformer primary; Described voltage feedback module is connected with linear coupling and electric welding machine output; Described Executive Module is connected with PWM module and transformer primary.
The utility model beneficial effect is compared with prior art embodied in:
The utility model adopts the high control performance of UC3842 control chip, ensure that the stable operation of whole device.The current feedback module adopted, voltage feedback module and PWM module, can play good effect in the course of work of electric welding machine, the electric energy making it export is more stable, if when occurring abnormal, system can regulate automatically, and the trend of the size of output is stablized,
And remain in certain scope, thus guarantee the quality of welding.
Accompanying drawing explanation
Fig. 1 is inverse-excitation type electric welding machine system construction drawing of the present utility model.
Fig. 2 is the utility model circuit theory sketch.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in detail:
As shown in Figure 1, a kind of inverse-excitation type miniature welding machine based on UC3842 of the present utility model comprises main circuit and controls two parts, and main circuit part comprises rectification module, filtration module, high frequency transformer module, rectification module, filtration module.Control section comprises UC3842 master controller, and on described UC3842 master controller, link block comprises PWM module, current feedback module, voltage feedback module, Executive Module, and described PWM module is connected with UC3842 master controller and Executive Module; Described current feedback module is connected with UC3842 master controller and transformer primary; Described voltage feedback module is connected with linear coupling and electric welding machine output; Described Executive Module is connected with PWM module and transformer primary.
As shown in Figure 2, the utility model circuit theory sketch, described current feedback is exactly make the electric current of output in the scope of setting, when output current changes suddenly and when departing from setting value, also corresponding change can be there is in the electric current in the primary side of circuit medium/high frequency transformer, what will cause flowing through R19 has corresponding change, thus the voltage on C14 will change, at this moment the voltage on UC3842 pin 3 can change, the dutycycle that pin 6 is exported changes, the electric current of output and voltage trend is allowed to stablize, when wherein electric current changes larger suddenly, when voltage on pin 3 is greater than certain voltage, UC3842 quits work, protection electric welding machine and personal safety, described Voltage Feedback be exactly electric welding machine is exported by voltage monitor voltage in certain scope, when output overvoltage or under-voltage time, namely not when the scope of voltage monitor, PC817 linear optical coupling just quits work, guarantee welding machine and personal safety, wherein voltage monitor is made up of two TL431, and voltage range is:
Lower limit=(1+R7/R10) Vref
The upper limit=(1+R8/R11) Vref
Just do not start when voltage is less than voltage monitor lower limit settings, exceed voltage monitor upper limit settings would not work, thus ensure that no matter electric welding machine is that welding starts, work or unloaded time, the magnitude of voltage that electric welding machine exports will control in certain scope; Wherein PC817 linear optical coupling, electrical isolation effect, namely increases security, reduces circuit interference, simplifies circuit design.In Voltage Feedback, due to the effect of voltage monitor and PC817 linear optical coupling, ensure that the autoprotection of the relatively stable and electric welding machine that electric welding machine exports.
Claims (4)
1. the inverse-excitation type miniature welding machine based on UC3842, comprise main circuit and control two parts, main circuit part comprises rectification module, filtration module, high frequency transformer module, rectification module, filtration module, control section comprises UC3842 master controller, on described UC3842 master controller, link block comprises PWM module, current feedback module, voltage feedback module, Executive Module, and described PWM module is connected with UC3842 master controller and Executive Module; Described current feedback module is connected with UC3842 master controller and transformer primary; Described voltage feedback module is connected with linear coupling and electric welding machine output; Described Executive Module is connected with PWM module and transformer primary.
2. a kind of inverse-excitation type miniature welding machine based on UC3842 according to claim 1, is characterized in that: described Executive Module is MOSFET pipe; Described transformer module is intermediate frequency or high frequency R type transformer.
3. a kind of inverse-excitation type miniature welding machine based on UC3842 according to claim 1, is characterized in that: described linear coupling is PC817 linear coupling, has electrical isolation effect.
4. a kind of inverse-excitation type miniature welding machine based on UC3842 according to claim 1, is characterized in that: described voltage feedback module adopts the voltage monitor of two TL431 compositions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520648261.4U CN204867869U (en) | 2015-08-24 | 2015-08-24 | Turn over and swash small -size electric welding of formula based on UC3842 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520648261.4U CN204867869U (en) | 2015-08-24 | 2015-08-24 | Turn over and swash small -size electric welding of formula based on UC3842 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204867869U true CN204867869U (en) | 2015-12-16 |
Family
ID=54812293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520648261.4U Expired - Fee Related CN204867869U (en) | 2015-08-24 | 2015-08-24 | Turn over and swash small -size electric welding of formula based on UC3842 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204867869U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276436A (en) * | 2017-08-08 | 2017-10-20 | 广西南宁驰信电子科技有限公司 | A kind of single-end flyback switching power supply circuit |
| CN108322051A (en) * | 2017-12-29 | 2018-07-24 | 河南北瑞电子科技有限公司 | A kind of inverse-excitation type switch power-supply |
| CN116073679A (en) * | 2023-03-31 | 2023-05-05 | 合肥东昇机械科技有限公司 | Rectifying mechanism, heating device and method |
-
2015
- 2015-08-24 CN CN201520648261.4U patent/CN204867869U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276436A (en) * | 2017-08-08 | 2017-10-20 | 广西南宁驰信电子科技有限公司 | A kind of single-end flyback switching power supply circuit |
| CN108322051A (en) * | 2017-12-29 | 2018-07-24 | 河南北瑞电子科技有限公司 | A kind of inverse-excitation type switch power-supply |
| CN116073679A (en) * | 2023-03-31 | 2023-05-05 | 合肥东昇机械科技有限公司 | Rectifying mechanism, heating device and method |
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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: 20151216 Termination date: 20160824 |